Journal of Vinyl & Additive Technology最新文献

{"title":"An experimental study on jute/banana fiber reinforced poly(vinyl alcohol) composites with nanofiller","authors":"Tasfia Tasnim,&nbsp;M. S. Rabbi,&nbsp;Md. Mahmudul Adil,&nbsp;Md. Abdul Hasib","doi":"10.1002/vnl.22127","DOIUrl":"10.1002/vnl.22127","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>The incorporation of nanoparticles into natural fiber composites has the potential to alter the characteristics of natural fiber composites. In this study, various properties of jute and banana fiber reinforced poly(vinyl alcohol) (PVA) composites with different nanofillers incorporation were investigated. Samples were prepared using the vacuum bagging technique. Inorganic nanoparticles (Al₂O₃, ZnO, MgO, CuO, and TiO₂) were synthesized using a ball milling machine and in each sample, 3 wt.% of nanofillers were incorporated. The maximum ultimate tensile strength and elongation percentage is found for TiO₂, which is 90.433% higher than pure PVA whereas MgO incorporated samples provides maximum flexural strength, which is 162.59% higher than PVA. The sample with Al₂O₃ provides strongest impact resistance, 17.3 J/cm². It was found that the decomposition temperatures were slightly higher for MgO and CuO doping than the undoped PVA composite. The FT-IR spectra exhibited notable hydroxyl groups and minor shifts indicating a reduction in hydrophilicity upon the introduction of nanoparticles. The water absorption exhibited a reduction of up to 36% in conjunction with an increase in density across all samples. The highest crystallinity is found for CuO nanofiller composite, validated by x-ray diffraction analysis. Additionally, morphological changes in the composites were seen through scanning electron microscopy and EDX shows a strong peak at 2.1 keV indicate some impurities present in the samples.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Jute/banana/PVA composites were prepared with 3 wt% nanoparticles incorporation.</li>\u0000 \u0000 <li>Metal oxides such as Al₂O₃, ZnO, MgO, CuO, and TiO₂ were used as nanoparticle.</li>\u0000 \u0000 <li>The use of nanoparticle improved the tensile, flexural, and impact properties.</li>\u0000 \u0000 <li>Decomposition temperatures were found higher for MgO and CuO incorporated composites.</li>\u0000 \u0000 <li>Upon nanoparticle incorporation, water absorption exhibited a reduction of upto 36%.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141649578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of flexible magneto-electric polyvinyl alcohol composites using hybrid filler particles of carbon quantum dots and cobalt nano for electromagnetic interference shielding application","authors":"T. Suresh,&nbsp;Sumanth Ratna Kandavalli,&nbsp;T. Rajendiran,&nbsp;K. Chanthirasekaran","doi":"10.1002/vnl.22107","DOIUrl":"10.1002/vnl.22107","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>The main objective of the study is to synthesis and characterization of flexible magneto-electric Polyvinyl Alcohol (PVA) composites for Electromagnetic Interference (EMI) shielding applications, by incorporating carbon quantum dots extracted from lychee fruit husks and cobalt nanoparticles sourced from <i>Plectranthus amboinicus</i>. Comprehensive mechanical, dielectrical, magnetic, and shielding tests were conducted to assess the performance of these novel materials. The mechanical characteristics of the composites were assessed to gauge their flexibility and robustness. In this regard, PV4 displayed a substantial tensile strength of 68 MPa, while PV6 exhibited an enhanced shore-D hardness rating of 47. PV6 demonstrates superior dielectric properties, including a higher dielectric constant and a lower loss tangent, which are crucial for optimizing EMI shielding efficiency. When it comes to magnetic characteristics such as magnetization, retentivity, and coercivity, the PV6 composite designation outperforms the other composites. Additionally, PV6 exhibits higher electromagnetic interference (EMI) shielding effectiveness, measuring at approximately 49.8 dB in the E band and 56.5 dB in the F band. Findings demonstrate that the integration of carbon quantum dots and cobalt nanoparticles into the matrix resulted in flexible composites with enhanced mechanical strength. The incorporation of cobalt contributed to notable magnetic properties, increasing the materials' magnetization and retentivity. The tests on electromagnetic interference (EMI) showed that the shielding effectiveness got improved. The composite materials were able to reduce interference from electromagnetic waves in the tested frequency ranges. These flexible magneto-electric PVA composites, developed using sustainable sources such as lychee fruit husks and <i>Plectranthus amboinicus</i>, exhibit promising potential for EMI shielding applications in diverse industries, including telecommunications, aerospace, and electronics, where reliable interference control is essential for optimal performance and safety.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Cobalt nanoparticles sourced from <i>Plectranthus amboinicus</i>.</li>\u0000 \u0000 <li>Carbon quantum dots are prepared from lychee fruit husks via controlled pyrolysis.</li>\u0000 \u0000 <li>High tensile strength PVA composites prepared.</li>\u0000 \u0000 <li>Highest dielectric constant of 8.2 achieved for composite PV6.</li>\u0000 \u0000 <li>Higher wave shielding up to 56.5 dB achieved in “E” band.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141570169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DL-Isoborneol esters as nontoxic main plasticizers for polyvinyl chloride with improved processability, thermal stability, and mechanical performance","authors":"Hong-ying Chu,&nbsp;Chuan Gao,&nbsp;Shuai Huang,&nbsp;Xin-Ding Yao","doi":"10.1002/vnl.22126","DOIUrl":"10.1002/vnl.22126","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>DL-Isoborneol is a forestry chemical product that can serve as an intermediate in the synthesis of value-added plasticizer products. In this study, three kinds of DL-Isoborneol esters (octanoic acid-DL-Isoborneol, decanoic acid-DL-Isoborneol ester, and lauric acid-DL-Isoborneol ester [LDE]) with different fatty hydrocarbon chains were synthesized via esterification reaction. Fourier transform infrared spectrometer (FT-IR) and Nuclear magnetic hydrogen spectrum (¹H NMR) indicated that DL-Isoborneol esters were successfully synthesized. The oral toxicity experiment of plasticizers in mice indicated that DL-Isoborneol esters have toxic doses of 5000 mg/kg and was environmentally friendly and nontoxic. DL-Isoborneol esters were used as main plasticizers to plasticize polyvinyl chloride (PVC) and compared with commercial plasticizer dioctyl phthalate (DOP). The results showed that DL-Isoborneol esters could improve thermoplastic processing performance and thermal stability of plasticized PVC than DOP. DL-Isoborneol esters and PVC showed more excellent compatibility compared with DOP. <i>T</i>_g of plasticized PVC reached 22°C, tensile strength and elongation at break of PVC plasticized with 40 wt% LDE reached 12.90 ± 0.83 MPa and 342 ± 13%, respectively. DL-Isoborneol esters with improved migration resistance performance and plasticization efficiency can completely replace DOP as main plasticizers for PVC.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>DL-Isoborneol esters with different fatty hydrocarbon chains were synthesized.</li>\u0000 \u0000 <li>DL-Isoborneol esters have toxic doses of 5000 mg/kg and are nontoxic.</li>\u0000 \u0000 <li>DL-Isoborneol esters can be used as main plasticizer for PVC.</li>\u0000 \u0000 <li>Plasticized PVC with improved processability.</li>\u0000 \u0000 <li>DOP can be completely replaced by DL-Isoborneol esters.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of recycled rubber in carbon black as a filler in ternary blends of NR/BR/SBR for the automotive tire industry","authors":"Slaviša Jovanović,&nbsp;Suzana Samaržija-Jovanović,&nbsp;Vojislav Jovanović,&nbsp;Gordana Marković,&nbsp;Jelena Vujaković,&nbsp;Milena Marinović-Cincović","doi":"10.1002/vnl.22128","DOIUrl":"https://doi.org/10.1002/vnl.22128","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This work aims to find the optimal ratio of recycled rubber (RR) in carbon black (CB)/RR filler and determine its influence on the mechanical properties, thermal behavior, and activation energy of ternary rubber based on polyisoprene (natural rubber [NR]), polybutadiene (butadiene rubber [BR]), and styrene–butadiene rubber (SBR) with a constant ratio of 40/40/20 parts per 100 of rubber (phr). The filler used was N330 (60 phr) and a mixture of CB/RR filler in the following proportions: 55/5, 50/10, and 40/20 phr. The activation energy of the examined samples was determined by the rheometric method. The samples were subjected to thermo-oxidative (at 100°C after 168 h) and γ-radiation aging (200 kGy). Hardness, tensile strength, and elongation at break were evaluated before and after thermo-oxidative and γ-radiation aging. SEM, attenuated total reflectance fourier-transform infrared (ATR-FTIR), and TG/DTG techniques were used to characterize NR/BR/SBR composites.</p>\u0000 \u0000 <p>The results show that the most optimal CB/RR ratio is 55/5 phr, which is confirmed by the mechanical properties before and after aging and the results for the activation energies of cross-linking and reversion. The thermal stability of the composite containing 60 phr of the CB and the composite reinforced with 5 phr of the RR in CB/RR filler is almost the same.</p>\u0000 \u0000 <p>The results of this research may be applicable in the automotive tire industry since NR/BR/SBR composites are used for automotive tire treads. Another benefit of this research is that the partial replacement of CB with RR contributes to the reduction of tire waste, and thus to the preservation of environmental protection.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Rubber composite NR/BR/SBR = 40/40/20 phr reinforced with CB/RR filler</li>\u0000 \u0000 <li>The amount of RR in the CB/RR filler has been changed to 5, 10 and 20 phr</li>\u0000 \u0000 <li>The lowest value for <i>E</i>_ac has the sample containing filler CB/RR = 55/5 phr</li>\u0000 \u0000 <li>The most thermally stable sample is the sample with 5 phr RR in CB/RR filler</li>\u0000 \u0000 <li>RR (5 phr) can be applied in CB/RR filler to reinforce NR/BR/SBR composites</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.22128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of solid lubricant reinforcing on drilling performance of castamide and thermal analysis","authors":"Eser Yarar,&nbsp;Tamer Sinmazçelik","doi":"10.1002/vnl.22124","DOIUrl":"10.1002/vnl.22124","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study addresses the pressing need for enhancing the machining performance and hole quality of castamide by investigating the effects of solid lubricant addition and drilling parameters. Castamide, a highly crystalline polyamide synthesized via anionic ring-opening polymerization, offers superior mechanical, physical, and chemical properties compared to conventional polyamide 6. However, its machining process, particularly drilling, remains a critical challenge due to its viscoelastic nature and sensitivity to heat generation. Using experimental investigations, thrust forces, drilling temperatures, hole geometry, and quality parameters are systematically analyzed and discussed. Notably, the study introduces Kestlub, a modified version of castamide with solid lubricant, and evaluates its drilling performance, a previously unexplored area in the literature. The research employs response surface methodology to model experimental data, considering both linear and quadratic effects of drilling parameters. Additionally, the significance of each parameter is assessed using ANOVA tables and Pareto charts, offering valuable insights into optimizing the drilling process for enhanced hole quality in castamide. It found that optimal drilling conditions occur at low rotational speeds and high feed rates, but thermal damage, influenced by factors like thermal conductivity and transition temperature, affects hole geometry and burr formation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Drilling performances of solid lubricant reinforced castamides were investigated.</li>\u0000 \u0000 <li>Drilling temperatures were recorded with a thermal camera and differential scanning calorimeter and thermal gravimetric analyses were performed.</li>\u0000 \u0000 <li>Drilling properties were analyzed statistically according to the response surface method.</li>\u0000 \u0000 <li>It found that optimal drilling conditions occur at low rotational speeds and high feed rates.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.22124","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141368228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrospun hexagonal boron nitride/CNT reinforced nanocomposite fiber mats for cosmic radiation shielding","authors":"Serra Ersoy,&nbsp;Mücahid Özcan,&nbsp;Cengiz Kaya,&nbsp;Figen Kaya","doi":"10.1002/vnl.22125","DOIUrl":"10.1002/vnl.22125","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>A novel methodology is introduced to asses the efficacy of cosmic radiation shielding through the fabrication of electrospun nanocomposite fiber mats reinforced with hexagonal boron nitride (h-BN) and carbon nanotubes (CNTs). These mats were fabricated using various h-BN particles synthesized with 1 M boric acid and four distinct 1 M nitrogen sources to produce polyethylene oxide (PEO) nanofibers via the electrospinning method at 15 kV, a 43.0 μL/min pumping rate, and a 20 cm distance with a maximum thickness of 10 μm. High neutron shielding capability nanocomposite fibers denoted BN-F4 (spun with h-BN [melamine]/CNT powders in a 5 wt% PEO solution) and BN-F5 (spun with h-BN [urea]/CNT powders in a 5 wt% PEO solution) were produced. By calculating the theoretical photon transmittance and evaluating the neutron shielding efficiency with an Am-Be neutron source and a BF₃ neutron detector, the cosmic radiation shielding capability of nanocomposite mats was discussed. BN-F4 and BN-F5 exhibited neutron shielding properties of 7.124% and 6.37% for 3.82 and 1.87 g/mL, respectively. This research establishes a new benchmark in the fabrication of flexible, ultrathin, and lightweight radiation shielding materials and enhances the practicality of nanocomposites reinforced with h-BN and CNTs by incorporating synthesizing and characterizing steps.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>In the study, hexagonal boron nitride production was carried out with four different nitrogen sources and which one showed better structural and morphological properties was supported by analysis.</li>\u0000 \u0000 <li>Additionally, an optimization study of nanofibers by electrospinning by adding CNT and h-BN particles with PEO polymer is included.</li>\u0000 \u0000 <li>It is thought that the production of h-BN and nanofiber work as a radiation shielding feature for use in space studies will be innovative and contribute to the deficiency in the literature.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.22125","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141372387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insight into the diffusion behaviors of SBS-compatibilizer-coupled modified asphalt: Molecular dynamics simulation and experimental validation","authors":"Fuqiang Dong,&nbsp;Jinli Lu,&nbsp;Xin Yu,&nbsp;Peixing Yang,&nbsp;Yong Jin,&nbsp;Lei Wan,&nbsp;Yongling Ding,&nbsp;Haonan Chen","doi":"10.1002/vnl.22123","DOIUrl":"10.1002/vnl.22123","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Compatibilizers play a crucial role in enhancing the compatibility between styrene–butadiene–styrene (SBS) polymer and asphalt, and the coupling of compatibilizers with SBS affects the motion behavior of asphalt molecules, which influences the performance of SBS modified asphalt. In this investigation, molecular dynamics simulation is employed to evaluate the impact of SBS coupling with compatibilizers on alterations in the self-motion behavior of asphalt molecules, changes in relative free volume, and modifications in system energy. The findings reveal that with the introduction of a compatibilizer, the combined effect of the compatibilizer and SBS coupling amplifies the mobility of the constituents within the modified asphalt. This amplification manifests as increased relative free volume within the system, heightened activation of modified asphalt molecules, and a simultaneous reduction in the interaction energy among these molecules. Following that, the high-temperature rheological properties of SBS modified asphalt were verified with the simulation results, coupled with temperature scanning experiments. This study describes the intrinsic mechanism of interaction of compatibilizers in SBS modified asphalt at the molecular scale.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Molecular dynamics simulations and experimental validation were implemented for styrene–butadiene–styrene (SBS)-modified asphalt.</li>\u0000 \u0000 <li>Compatibilizers can activate the activity of SBS modified asphalt.</li>\u0000 \u0000 <li>Compatibilizers allow a better release of the properties of the bitumen and SBS.</li>\u0000 \u0000 <li>Compatibilizers can replace bitumen and act with SBS to improve its modification efficiency.</li>\u0000 \u0000 <li>The optimum dosage of compatibilizer is 3%.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141382301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A self-assembled tannic acid-modified Zn-Al LDH supported Mg(OH)2 nanofiller for the preparation of bisphenol A based poly(amide-imide) nanocomposites","authors":"Mohsen Hajibeygi,&nbsp;Hesam Moradi","doi":"10.1002/vnl.22114","DOIUrl":"10.1002/vnl.22114","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>A multifunctional organic-inorganic nanofiller as a reinforcement of bisphenol A based poly(amide-imide) (BPAI) was assembled through the formation of electrostatic forces between tannic acid (TA)-modified Zn-Al LDH and Mg(OH)₂ nanoparticles (MDH). TA-modified MDH@Zn-Al LDH (TML) was fabricated using an in-situ, one-step co-precipitation method. This involved the growth of LDH layers in the TA/MDH suspension. The manner of surface modification and the placement of MDH along with LDH in the TML structure were confirmed using FTIR, XRD, FE-SEM, and TGA. The results exhibited that the modification has resulted in an intercalated structure with increased interlayer spacing of LDH. The Poly(amide-imide) nanocomposites were prepared by reinforcing BPAI with TML using the solution casting method. The best thermal stability of the nanocomposites, in both air and N₂ atmospheres, appeared in the sample with 2 wt% TML content. The <i>T</i>₁₀ and <i>T</i>_max values of this sample in the air atmosphere were found to be 45 and 37°C higher, respectively, than those of BPAI. Comparative to neat BPAI, the THR and HRC values of the mentioned sample were reduced by 43.6% and 45.7%, respectively. These results demonstrated the significant synergistic effect of the TML structure in enhancing the thermal and combustion resistance of BPAI.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Preparation of LDH on a Mg(OH)₂/tannic acid as multifunctional nanofiller.</li>\u0000 \u0000 <li>Self-assembling nanofiller including tannic acid-modified LDH-supported MDH.</li>\u0000 \u0000 <li>A synthesized bisphenol A based poly(amide-imide) (BPAI).</li>\u0000 \u0000 <li>Effect of the nanofiller on the thermal and combustion resistance of BPAI.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141191202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-based and effective: Cardanol-piperidine derivatives for enhanced polypropylene resistance against thermo- and photo-oxidative aging","authors":"Xuemei Zeng,&nbsp;Jianxiang Feng,&nbsp;Yulin He,&nbsp;Siyu Cao,&nbsp;Cheng Zhou,&nbsp;Kangqi Li,&nbsp;Jinjing Tan,&nbsp;Shuyi Chen,&nbsp;Yong Xia,&nbsp;Yuejun Liu,&nbsp;Pu Shi,&nbsp;Jin Zhu","doi":"10.1002/vnl.22113","DOIUrl":"10.1002/vnl.22113","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Bio-based antioxidants have garnered attention for their sustainability and environmental benefits. In this study, we designed and synthesized three cardanol-piperidine derivatives (HSs) by utilizing hydrogenated cardanol (HC) and piperidine derivatives to improve the aging inhibition of polypropylene (PP). These bio-based antioxidants were intended as eco-friendly alternatives to conventional synthetic antioxidants. The impact of these HSs on the thermal stability, thermo-oxidative stability, and light stability of PP was thoroughly evaluated. The results unveiled that after 5 h of interaction with 2,2-diphenyl-1-picrylhydrazyl free radical, HSs exhibited a remarkable over 5-fold increase in free radical scavenging efficiency as compared to HC. Moreover, the addition of HSs significantly increased the oxidation induction time and the initial oxidation temperature compared to pristine PP. After photo-oxidative aging and thermo-oxidative aging, the HS-dosed PP demonstrated remarkable retention of elongation at break, reaching more than 72% and 69%. From the comparison with physical mixtures and the density functional theory calculations, an intramolecular synergism mechanism is proposed. The intramolecular synergism between hydrogenated cardanol and piperidine derivatives may be the main reason for the inhibition of PP aging.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>A method for constructing simultaneous efficient light, thermal, and oxygen stable polypropylene.</li>\u0000 \u0000 <li>The mechanism for achieving simultaneous stabilization of light, heat, and oxygen is the intramolecular synergy of phenol piperidine.</li>\u0000 \u0000 <li>The essence of intramolecular synergy of cardanol and piperidine derivatives is its' reduced hydrogen bond dissociation energy and energy gap.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141122365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polyvinylpyrrolidone-functionalized graphene oxide as a nanocarrier for dual-drug delivery of quercetin and curcumin against HeLa cancer cells","authors":"Anita Rana,&nbsp;Monika Matiyani,&nbsp;Pushpa Bhakuni Negi,&nbsp;Himani Tiwari,&nbsp;Kamal Garwal,&nbsp;Souvik Basak,&nbsp;Nanda Gopal Sahoo","doi":"10.1002/vnl.22115","DOIUrl":"10.1002/vnl.22115","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study is to develop a nanocarrier based on polyvinylpyrrolidone (PVP)-functionalized graphene oxide (GO–PVP), loaded with both curcumin (CUR) and quercetin (QSR), and then its performance compared with nanocarriers carrying the drugs separately. The study also aimed to investigate the cytotoxic effects of these nanocarriers on HeLa cancer cells. To achieve this, GO was synthesized using a modified version of Hummer's method and subsequently functionalized with PVP. Drug loading onto the GO and GO–PVP nanocarriers was achieved through hydrophobic interactions. Furthermore, the ability of the nanocarriers to accommodate a single drug or a combination of drugs was examined. In our study, combined system shows higher drug loading, that is, 28.1% of QSR and 24.34% of CUR onto GO–PVP–QSR–CUR nanocarrier in comparison to single drug nanocarrier systems GO–PVP–QSR and GO–PVP–CUR which loaded 22.5% of QSR and 18.73% of CUR, respectively. Notably, the synthesized nanocarrier exhibited a pH-sensitive drug release pattern. These results collectively suggest that GO–PVP–CUR–QSR displayed significantly higher cytotoxicity against HeLa cancer cells compared to both single-drug nanocarrier systems at the specified concentrations. In addition, future pre-clinical and clinical studies to evaluate the safety and efficacy of GO–PVP–CUR–QSR for cancer treatment are strongly recommended.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Developed nanocarrier based on polyvinylpyrrolidone functionalized GO (GO–PVP).</li>\u0000 \u0000 <li>The GO–PVP nanocarrier was loaded with both curcumin (CUR) and quercetin (QSR).</li>\u0000 \u0000 <li>GO–PVP displays a higher loading capacity for both QSR and CUR compared to GO.</li>\u0000 \u0000 <li>QSR- and CUR-loaded GO–PVP nanocarriers exhibited higher cytotoxic effects.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140927043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}