Journal of Vinyl & Additive Technology最新文献

{"title":"Fluorinated-polyhedral oligomeric silsesquioxane (F-POSS) functionalized halloysite nanotubes (HNTs) as an antifouling additive for epoxy resin","authors":"Julieta Fabienne Uicich,&nbsp;Maryam Jouyandeh,&nbsp;Diana Fasce,&nbsp;Pablo Ezequiel Montemartini,&nbsp;Marcela Elisabeth Penoff,&nbsp;Henri Vahabi,&nbsp;Mohammad Reza Saeb","doi":"10.1002/vnl.22081","DOIUrl":"10.1002/vnl.22081","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Antifouling epoxy resin serves as a member of advanced nanocomposite coatings and engineered surfaces. Nevertheless, developing an antifouling epoxy composites is a state-of-the-art technology. Herein, a complex nanostructure is tailored to be served as an advanced additive giving the antifouling characteristics to the epoxy resin. F-POSS@HNT hybrid nanostructure, that is, halloysite nanotubes (HNTs) decorated with fluorinated polyhedral oligomericsil sesquioxane (F-POSS), was synthesized and characterized. Chemical structure changes, thermal stability and morphology of hydroxylated HNTs (hHNTs) intermediate and F-POSS@HNT ultimate nanostructures were analyzed by FTIR spectroscopy, TGA and TEM, respectively. The F-POSS@HNTs catalyzed the epoxy-amine crosslinking reaction, taking “<i>Good</i>” or “<i>Excellent</i>” crosslinking tags an quantified by the “<i>Cure Index</i>.” The apparent activation energy values were calculated for the epoxy (reference), epoxy/hHNTs, and epoxy/F-POSS@HNTs systems (26, 51, and 47 kJ mol⁻¹, respectively). Contact angle measurements were performed via dynamic tests demonstrating improved hydro- and oleophobicity of the thermoset composites. The advancing contact angle with diiodomethane increased 36% and 30% for nanocomposites containing 5 and 10 wt.% of the developed hybrid nanostructure, respectively, compared with the neat epoxy. Likewise, 54% and 67% reduction in paraffin fouling in the same order confirmed their antifouling ability. Regarding self-cleaning characteristics, 24% and 33% surface recovery were observed, respectively.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Antifouling surface was achieved in epoxy thermoset nanocomposites for potential industrial applications.</li>\u0000 \u0000 <li>Self-cleaning behavior correlated with low wetting and antifouling properties.</li>\u0000 \u0000 <li>F-POSS@HNT nanofillers were synthesized and successfully added to epoxy matrix.</li>\u0000 \u0000 <li>Both hHNT and F-POSS@HNT showed a beneficial autocatalytic effect on epoxy-amine reaction yielding satisfactory polymer crosslinking.</li>\u0000 \u0000 <li>Activation energy was reduced by incorporating F-POSS@HNT compared with hHNT, signature of facilitated crosslinking.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 3","pages":"727-747"},"PeriodicalIF":2.7,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139062564","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":"Influence of cesium bromide nanoparticles on the structural, optical, electrical, and antibacterial properties of polyvinyl alcohol/sodium alginate for biological applications","authors":"N. S. Diab,&nbsp;H. M. Ragab,&nbsp;Fatma A. Hamada,&nbsp;Rosilah Ab Aziz,&nbsp;Azzah M. Alghamdi,&nbsp;M. O. Farea","doi":"10.1002/vnl.22086","DOIUrl":"10.1002/vnl.22086","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study investigates the use of organic and inorganic nanostructures to create innovative functional materials with applications in optoelectronics devices. Specifically, nanocomposite films were created by incorporating different concentrations of cesium bromide nanoparticles (5, 10, and 15 wt%) into a polyvinyl alcohol (PVA) and sodium alginate (SA) polymer blend (50/50 wt%) through a solution casting process. The impact of CsBr NPs on the structural, optical, and electrical properties of the virgin PVA/SA matrix was systematically investigated. x-ray crystallography investigation verified the semicrystalline nature of the PVA/SA. FTIR spectra showed the main vibrational peaks of PVA/SA, with their intensity decreasing after the addition of cesium bromide. Scanning electron microscopy images showed the formation of aggregations and the increase of roughness for the PVA/SA-CsBr NPs 15 wt% nanocomposite sample. The UV/vis. absorption spectrum showed a decrease in the energy gap values, which decreased from 4.25 to 3.89 eV in the direct transition and decreased from 4.12 to 3.77 eV in the indirect transition. Furthermore, the electrical conductivity and dielectric properties demonstrated improvement with increasing concentration of CsBr NPs. The antibacterial efficacy against <i>Staphylococcus aureus</i> and <i>Escherichia coli</i> exhibited an upward trend with an increase in CsBr nanoparticle concentration. Overall, the results suggest the promising potential of these nanocomposite films for applications in optoelectronics and biological applications.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>XRD shows that the amorphousity is increased after addition CsBr NPs.</li>\u0000 \u0000 <li>FT-IR confirms the interactions/complexation between PVA/SA polymeric matrix filled with CsBr NPs.</li>\u0000 \u0000 <li>Optical energy gap is decreased with increasing CsBr concentrations.</li>\u0000 \u0000 <li>SEM images show the prepared samples have a smooth surface and only have a few defects.</li>\u0000 \u0000 <li>By adding CsBr NPs the electrical conductivity is tremendously improved.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 3","pages":"801-813"},"PeriodicalIF":2.7,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139052424","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":"Effect of aluminum diisobutyl hypophosphate in polyethylene terephthalate and its flame retardant mechanism","authors":"Yushu Xiang,&nbsp;Yun Gao,&nbsp;Guomin Xu,&nbsp;Wentao He,&nbsp;Lijuan Long,&nbsp;Shuhao Qin,&nbsp;Jie Yu","doi":"10.1002/vnl.22083","DOIUrl":"10.1002/vnl.22083","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Alkyl hypophosphate flame retardants have aroused intense research interests in flame retardancy of polymers owing to the combined effect of gas phase and condensed phase. In this work, aluminum diisobutyl hypophosphate (APBA) was incorporated into polyethylene glycol terephthalate (PET) to investigate its flame retardant effect and mechanism. PET achieved a V-2 level in UL-94, with a low LOI of 21.2%. In contrast, PET/APBA-15% composites showed a 51% increase of LOI value and a V-0 level, accompanied with the significant reduction of melt droplets. Gas phase analysis by Py-GC/MS and TG-FTIR indicated that the phosphorous free radicals and nonflammable gases were generated during the cracking of APBA, resulting in the radical quenching and dilution of combustible gas. Condensed phase analysis by SEM, Raman, and XPS results revealed that APBA could effectively facilitate the formation of dense char layers consisting of aluminophosphate and graphitic structures due to the interaction with PET matrix. The compact barrier layer could insulate heat and inhibit the volatilization of combustible materials, leading to improved flame retardant properties. Furthermore, the introduction of APBA increased the melt viscosity of PET/APBA composites according to rheological analysis, which further promoted the formation of a char barrier layer to further enhance the flame retardant properties.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Aluminum diisobutyl hypophosphate is used as an efficient flame retardant for PET.</li>\u0000 \u0000 <li>The flame retardant can degrade to release the phosphorous free radicals.</li>\u0000 \u0000 <li>The flame retardant can interact with the PET matrix and promote the charring.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 3","pages":"760-771"},"PeriodicalIF":2.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139052481","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":"Sliding wear characterization of epoxy composites filled with wood apple dust using Taguchi analysis and finite element method","authors":"Abhilash Purohit,&nbsp;Priyabrat Pradhan,&nbsp;Gaurav Gupta,&nbsp;Hemalata Jena,&nbsp;Jayshree Singh","doi":"10.1002/vnl.22085","DOIUrl":"10.1002/vnl.22085","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>In this research, a new class of composite made up of wood apple dust (WAD) and epoxy is developed using the hand lay-up process. The impact of WAD filler on the physical and wear characteristics of epoxy-based composites are examined. The composite samples are prepared by varying the weight content of WAD (0, 3, 6, 9, and 12 wt%). The composites are subjected to dry sliding wear testing in accordance with the L₂₅ Taguchi design to calculate the specific wear rate (SWR). An optimum parametric combination of control factors is established for the composites to have the least amount of wear loss. The SWR of WAD/epoxy composites is also predicted using commercial finite element method (FEM) software ANSYS 2019 R2. The experimental findings are compared with the predicted wear rates of the composites. The results revealed that addition of WAD powder improved the wear resistance of the composites. A remarkable increase in tensile, compressive and flexural strength values of 34.79%, 10.12%, and 22.66% respectively, is observed. Neat polymer has tensile, compressive and flexural strengths of 48, 82, and 22.5 MPa respectively, and the values increased to 64.7, 90.3, and 27.6 MPa with addition of 12 wt% WAD. It is further observed that out of the four control factors the most influencing control factor affecting the wear rate of the composites in decreasing order are WAD content, sliding velocity, sliding distance, and normal load.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>In this study a natural fiber-based waste, wood apple dust (WAD) is successfully used as a potential filler material in epoxy matrix.</li>\u0000 \u0000 <li>Physical and mechanical properties of the epoxy-WAD composites are analyzed.</li>\u0000 \u0000 <li>Effects of filler contents on the wear behavior are studied using design of experiment.</li>\u0000 \u0000 <li>The wear rate of WAD/epoxy composites is predicted using finite element method.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 3","pages":"788-800"},"PeriodicalIF":2.7,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138825503","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":"Polyvinyl alcohol-based fiber membranes with high strength and ultraviolet shielding properties for enhancing the shelf life of grapes","authors":"Keying Gao,&nbsp;Xinmei Li,&nbsp;Xiaohui Wang,&nbsp;Rui Yang","doi":"10.1002/vnl.22082","DOIUrl":"10.1002/vnl.22082","url":null,"abstract":"<p>Currently, the rising environmental concerns caused by nonbiodegradable food packaging materials have promoted the research and development of biodegradable alternatives. Polyvinyl alcohol (PVA) was selected as the substrate, and zinc oxide nanoparticles (ZnONPs) and titanium dioxide nanoparticles (TiO₂NPs) were blended and modified with PVA, respectively. Based on the electrostatic spinning technology to prepare fiber membranes with high strength and UV blocking properties for grapes preservation. The study indicated that the tensile strength of PVA fiber membranes increased by 243% and 209% when ZnONPs and TiO₂NPs were added at 1%, respectively. Under UV radiation, the PVA/ZnO composite membranes exhibited superior UV absorption than the PVA/TiO₂ composite membranes. After conducting TG tests, it was found that the addition of ZnONPs decreased the thermal stability of the fiber membranes, while TiO₂NPs could improve the thermal stability. Both composite membranes could extend grapes' shelf life, but the PVA/ZnO composite membranes were more effective at maintaining freshness than the PVA/TiO₂ composite membranes.</p>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 3","pages":"748-759"},"PeriodicalIF":2.7,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138685422","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":"Hydrothermal aging of glass fiber epoxy-carbon nanocomposites and its service life predictions based on tensile strength","authors":"Madhu B M,&nbsp;Rashmi Aradhya,&nbsp;Sundara Rajan J.","doi":"10.1002/vnl.22084","DOIUrl":"10.1002/vnl.22084","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This paper investigates the hydrothermal aging of pultruded glass-fiber reinforced epoxy nanocomposite rods with carbon nanofillers. The nanocomposites developed in this study are proposed for the core of high-tension low-sag conductors in power transmission. Nanocomposites were fabricated with a nanomodified matrix containing 0.2 wt.% of multi-walled carbon nanotubes and 0.6 wt.% of graphene nanoplatelets. The epoxy nanocomposites tensile strength and life predictions were determined under different water aging conditions. Objective of the study is to evaluate the water absorption kinetics and its impact on tensile strength, microstructure and to compute the service life under hydrothermal aging by predictive techniques. Nanocomposites were aged in water at 30, 50, and 80°C for a duration of 3000 h, and the microstructure and chemical composition were investigated. Based on Arrhenius's theory, a service life prediction model based on the tensile-strength of the nanocomposite is established for hydrothermal aging. The results have shown that the addition of carbon nanofillers to the epoxy matrix improves the hydrophobicity and reduces the water diffusion coefficient. Water absorptions of the nanocomposites are observed to follow Fick's law, and its influence on the mechanical properties of the nanocomposite is evident and is more significant in epoxy composites without carbon nanofillers. After 3000 h of immersion at 50 and 80°C, the tensile strength retention is above 85%. The hydrothermal environment accelerates the development of micro-voids and cracks, which are initially formed and observed to be the primary reason for the degradation in mechanical strength under service conditions, in addition to debonding of the fibers.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Carbon nanocomposites were aged at different temperatures and durations.</li>\u0000 \u0000 <li>Service life prediction model established based on Arrhenius's theory.</li>\u0000 \u0000 <li>Addition of carbon nanofillers enhances hydrophobicity and reduces water diffusion.</li>\u0000 \u0000 <li>Tensile strength retention above 85% after 3000 h of aging.</li>\u0000 \u0000 <li>Hydrothermal aging accelerates aging contributing to strength degradation.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 3","pages":"772-787"},"PeriodicalIF":2.7,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138631365","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":"Preparation of thermochromic bioplastic composite filaments for 3D printing process","authors":"Anchan Khankhuean,&nbsp;Kankavee Sukthavorn,&nbsp;Nollapan Nootsuwan,&nbsp;Chatchai Veranitisagul,&nbsp;Apirat Laobuthee","doi":"10.1002/vnl.22077","DOIUrl":"10.1002/vnl.22077","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This research aimed to produce thermochromic composite filaments by utilizing poly(lactic acid) (PLA) as a matrix and two distinct thermochromic additives (red and yellow colors). To produce thermochromic composite filaments with ratios ranging from 10 to 40 phr, different quantities of a thermochromic masterbatch were integrated into the PLA matrix through an extrusion process. The physical, mechanical, thermal properties, and thermochromic behavior of the composite filaments were further examined. The results indicated that the thermochromic additives had minimal impact on thermal and mechanical properties, while also revealing a two-phase separation between the smooth matrix and the spherical particle additives in the thermochromic composite filaments. Moreover, the analysis of thermochromic behavior revealed that an increase in the ratio of thermochromic masterbatches led to more pronounced coloration and clearer color changes, especially with red and yellow thermochromics indicating temperature variations below 22°C and over 65°C, respectively. The sample containing 40 phr exhibited the most intense color and noticeable color change. Furthermore, these thermochromic composite filaments can be utilized to 3D print various prototype products.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Thermochromic bioplastic composite filaments for 3D printing were successfully prepared.</li>\u0000 \u0000 <li>The thermochromic behavior analysis unveiled vivid coloration with distinct and more pronounced color changes.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 3","pages":"663-676"},"PeriodicalIF":2.7,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138631273","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":"Ball milling-assisted exfoliation and deposition to prepare few-layer graphene/PVC nanocomposites with enhanced thermal stability","authors":"Jinyun Li,&nbsp;Jingwei Xu,&nbsp;Wenhua Chen,&nbsp;Chen Ma,&nbsp;Guohua Chen","doi":"10.1002/vnl.22080","DOIUrl":"10.1002/vnl.22080","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>It is still a great challenge to prepare high-performance graphene/polymer nanocomposites by fully utilizing the large surface area, high tensile strength, and high thermal stability. Herein, a simple but efficient approach based on ball milling was developed to in situ exfoliate graphite into single-layer graphene and simultaneously deposit them onto polyvinyl chloride (PVC) surface. Graphene/PVC nanocomposites were prepared via the plasticized molding and followed by hot pressing. Resulting from incorporation of highly exfoliated and evenly distributed graphene nanosheets, the obtained graphene/PVC nanocomposites displayed a significantly enhanced thermal stability. In contrast with neat PVC, the temperature of maximum weight loss (<i>T</i>_max), glass transition temperature (<i>T</i>_g), and residual content of composite with 2.0 wt% graphene were increased by 10, 13°C, and 4.4%, respectively. Based on the deep analysis on heat releasing behavior and structure of residue, we proposed the related enhancing mechanism. Large-area and highly exfoliated graphene sheets effectively inhibited the heat/mass transfer in composite system and prevented the degradation of PVC, as well as promoted the compact residue formation from polymer itself at high temperatures. In short, this work provided an environmentally friendly strategy to prepare high-performance graphene/polymer nanocomposites with using low additive amount of single-layer graphene.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>A simple graphite exfoliation method based on ball milling was proposed.</li>\u0000 \u0000 <li>Strong shearing and compact force induce graphene exfoliation and deposition.</li>\u0000 \u0000 <li>Graphene/PVC nanocomposites with enhanced thermal stability was prepared.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 3","pages":"715-726"},"PeriodicalIF":2.7,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138585105","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":"Active antioxidant and aromatic films blended with persimmon (Diospyros kaki L.) and orange peel flour (Citrus sinensis) as sustainable packaging","authors":"Andreza Salles Barone,&nbsp;Julia Rabelo Vaz Matheus,&nbsp;Cláudia Leites Luchese,&nbsp;Mônica Regina da Costa Marques,&nbsp;Ana Maria Furtado de Souza,&nbsp;Willian Hermogenes Ferreira,&nbsp;Ricardo Felipe Alves Moreira,&nbsp;Ana Elizabeth Cavalcante Fai","doi":"10.1002/vnl.22075","DOIUrl":"10.1002/vnl.22075","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Active antioxidant and aromatic films based on persimmon (<i>Diospyros kaki</i> L.) cultivated according to agroecological precepts with orange peel flour (<i>Citrus sinensis</i>) and glycerol addition were developed by casting technique and characterized. The films were largely red and yellow appearance color, indicating a natural tendency to maintain the color of the persimmon pulp ripe. Scanning electron microscopy revealed a homogeneous and compact structure of the films, which obtained a rougher texture with the addition of glycerol. The addition of orange peel flour to the film-forming solution proportionally increased the total phenolic content and antioxidant capacity of the persimmon puree films. Volatile compounds belonging to different chemical classes were identified, including limonene, β-ionone, linolenic acid, palmitic acid, and vaccenic acid, which influence the overall aroma, as they were detected above their odor thresholds, and the functional properties of these films. Furthermore, the thermogravimetric analysis showed two important degradation steps related to glycerol and pectin (130–230°C) and decomposition of the polymer structure (above 300°C), guaranteeing the processability of the raw materials under conditions of higher temperatures than those normally used in industrial food packaging products in a circular economy context. This study indicates the potential for formation of persimmon-based films incorporated into orange peel flour as active antioxidant films for use in drinks and tea bags as a flavoring or as intermediate layers used between slices of cheese, avoiding direct contact with food, facilitating its separation, as some application examples.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Persimmon and orange peel flour films were developed by casting.</li>\u0000 \u0000 <li>Antioxidant and sensorial properties of blended films were evaluated.</li>\u0000 \u0000 <li>Volatile compounds were identified, including limonene and vaccenic acid.</li>\u0000 \u0000 <li>Circular economy principles were used to avoid postharvest fruit losses.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 2","pages":"635-650"},"PeriodicalIF":2.7,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138593982","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":"Effect of interfacial modification on functional properties of polyethylene and polypropylene—Fibrous silica nanocomposites","authors":"Aziz Fihri,&nbsp;Jevgenij Lazko,&nbsp;Fouad Laoutid,&nbsp;Jérôme Mariage,&nbsp;Julie Passion,&nbsp;Tim Schow,&nbsp;Yassine Malajati,&nbsp;Ruchi Rastogi,&nbsp;Haleema Alamri,&nbsp;Philippe Dubois","doi":"10.1002/vnl.22076","DOIUrl":"10.1002/vnl.22076","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This paper reports the results of polyethylene (PE) and polypropylene (PP) composites containing 5 and 10 wt.% dendritic fibrous nanosilica (DFNS) synthesized by a hydrothermal process. The objective of this investigation is to provide a better understanding of the relationship between the structure, composition, matrix-nanofiller interfaces, and the properties of these nanocomposites. These materials have been prepared by twin-screw extrusion and injection molding. Their structural, thermal, mechanical, rheological, and electrical properties were evaluated, both alone and when combined with an organic compatibilizing agent. Findings have shown that the unique morphology of fibrous silica nanoparticles was preserved and not altered by melt processing, indicating the high thermal and mechanical stability of these fibrous materials. The nanocomposites containing DFNS alone exhibited higher mechanical performances compared to those containing the surface modifier, with no observable effect on their thermal properties. Findings also showed that the interactions between the nanoparticles and polymer may influence the functional properties of the final nanocomposites, and that they are dependent on both the nature of the host polymer along with the presence of the surface modifier agent.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Well-defined DFNS were successfully prepared.</li>\u0000 \u0000 <li>PE and PP based nanocomposites were successfully designed by twin-screw extrusion.</li>\u0000 \u0000 <li>Good interfacial interactions were obtained with PP.</li>\u0000 \u0000 <li>Functional properties of the nanocomposites were influenced by the interfacial adhesion.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 3","pages":"653-662"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138513823","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}