Journal of Applied Polymer Science最新文献

{"title":"Preparation of high-performance polymer sensitive membrane for rapid and sensitive detection of ammonium ions in aqueous solution","authors":"Tianbing Li,&nbsp;Xiaozhen Lu,&nbsp;Haonan Chen,&nbsp;Junlong Cai,&nbsp;Hongbo Gao,&nbsp;Xuewu Zhu,&nbsp;Jian Yu,&nbsp;Guangchao Li","doi":"10.1002/app.56362","DOIUrl":"https://doi.org/10.1002/app.56362","url":null,"abstract":"<p>Polymer sensitive membrane is a key component of the ammonium ion selective electrode (ISE). Developing a high-performance ammonium ion polymer sensitive membrane can promote production and application of the electrode, reducing costs and simplifying ammonia nitrogen detection. In this study, we modified the surface of the ammonium ion selective membrane and synthesized a low-cost antimicrobial material by anchoring the broad-spectrum antimicrobial agent, silver nanoparticles (AgNPs), on the surface of two-dimensional transition metal car- bides (Ti₃C₂Tx MXene). This material can be used as a carrier to avoid the release of AgNPs. The inorganic antimicrobial agent AgNPs@MXene was adhered to the surface of the ammonium ion-selective membrane by polydopamine, forming an antimicrobial coating. The modified ammonium ion-selective electrode had a rapid response time of 12 s, with an average response time of 12.4 s. After repeated tests, a lower detection limit of 5.89 × 10⁻⁷ (10^−6.23) mol/L was achieved in ammonium chloride solution. These results indicate that the ammonium ion monitoring electrode we prepared can effectively monitor ammonia nitrogen concentration in sewage and wastewater over a long period of time. This also enhances the service life of the ammonium ISE and reduces maintenance costs for the sensor.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Triptycene based microporous hypercrosslinked polymer with amino functionality for selective CO2 capture","authors":"Mosim Ansari,&nbsp;Aasif Helal,&nbsp;Mahmoud Mohamed Abdelnaby,&nbsp;Abbas Saeed Hakeem,&nbsp;Mohd Yusuf Khan","doi":"10.1002/app.56383","DOIUrl":"https://doi.org/10.1002/app.56383","url":null,"abstract":"<p>The increasing CO₂ concentration in the atmosphere contributes significantly to global warming, necessitating effective capture techniques. Though amine-based solvents are commonly used, they have drawbacks like high energy consumption and corrosion. Physical adsorption using microporous sorbents with polar groups emerges as a promising alternative, offering high efficiency and selectivity for CO₂ capture. This work presents the design of a new microporous hypercrosslinked polymer with amino groups derived from the 3D molecular building block triptycene (TBMP-NH₂), for CO₂ capture applications. The triptycene unit in the polymer backbone provides high surface area, thermal stability, and microporosity. TBMP-NH₂ demonstrates excellent thermal stability (<i>T</i>_d &gt; 350°C), considerable microporosity, and a high BET-specific surface area of 866 m²/g, making it a promising microporous adsorbent. It exhibits a high CO₂ adsorption capacity of 1.86 mmol/g at 273 K and 1.23 mmol/g at 298 K, with a <i>Q</i>_st value of 33.95 kJ/mol, indicating a physisorption mechanism where the micropore volume (<i>V</i>_mic = 0.359 cm³/g) plays a crucial role. TBMP-NH₂ displays good CO₂/N₂ and CO₂/CH₄ selectivity, outperforming several reported porous polymers. Owing to its high physiochemical and thermal properties, and efficient and selective CO₂ capture ability, TBMP-NH₂ can be considered a promising material for CO₂ capture and environmental remediation application.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of succinonitrile on the structural, ion conductivity, and dielectric properties of PVDF-HFP based solid polymer electrolytes","authors":"Iqra Rani,&nbsp;Sajal Arwish,&nbsp;Khizar Hayat Khan,&nbsp;Muddassir Zamurad,&nbsp;Syed Mujtaba Shah,&nbsp;Hazrat Hussain","doi":"10.1002/app.56331","DOIUrl":"https://doi.org/10.1002/app.56331","url":null,"abstract":"<p>A detailed account of the poly(vinylidene difluoride-co-hexafluoropropylene) (PVDF-HFP)/succinonitrile (SN)/lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) based solid polymer electrolytes (SPEs) of various compositions is reported. SN is incorporated as plasticizer, while LiTFSI is employed as the source of lithium ions. Fourier transfer infrared (FTIR) spectroscopy reveals the formation of polar and electroactive γ crystal phase by PVDF in pristine PVDF-HFP and the prepared SPE films. FTIR further confirms the interaction between the host polymer and the salt and between the salt and the plasticizer. The interaction between the salt and plasticizer suggests that SN not only offers the plasticization effect but also facilitates salt dissociation. The ion conductivity increases with increasing salt content up to 20 wt% but beyond that concentration a decline in ion conductivity is observed, which could be attributed to the ion pair association or cluster formation due to the excess salt concentration that reduces the availability of free ions and ultimately leads to the reduction in ion conductivity. After including SN in the SPE formulation, electrochemical impedance spectroscopy reveals a substantial increase in room temperature ion conductivity of the SPE from ~1.08 × 10⁻⁵ S cm⁻¹ for pristine SPE with 20 wt% salt to ~2.7 × 10⁻⁴ S cm⁻¹ for plasticized SPE with 40 wt% SN and 20 wt% salt. This is attributed to the plasticizing effect of SN that enhances ion mobility through the matrix and to the increased charge carrier concentration (SN facilities salt dissociation). The fabricated SPEs exhibit a significant enhancement in ion conductivity with increasing temperature and the maximum ion conductivity of 1.1 × 10⁻³ S cm⁻¹ is attained at 393 K by plasticized SPE with 40 wt% SN content. The ion conductivity of all the prepared SPEs follows the temperature dependent Arrhenius behavior, suggesting the thermally activated ion hopping mechanism of ionic conduction. Further, the plasticized SPEs display near unity ion transference number indicating the predominance of the ionic mode of conduction. The dielectric and electric modulus analysis reveal a faster relaxation phenomenon and hence higher ion conductivity of the prepared SPEs with increasing salt and plasticizer content.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of DPG/KH550 modified pyrolysis carbon black in oil and high temperature-resistant NBR composites","authors":"Yaqi Ge,&nbsp;Pengfei Diao,&nbsp;Xiangxu Li,&nbsp;Yukun Zhou,&nbsp;Zhenchun Xu,&nbsp;Huiguang Bian,&nbsp;Yao Xiao,&nbsp;Chuansheng Wang","doi":"10.1002/app.56377","DOIUrl":"https://doi.org/10.1002/app.56377","url":null,"abstract":"<p>In this paper, pyrolysis carbon black (CBp) was introduced into nitrile butadiene rubber (NBR), the effects of the ratio of CBp and carbon black (N326) on the properties of NBR composites were investigated, and the optimal ratio was determined. On this basis, the accelerator DPG, coupling agent KH550 and CBp were modified by ball milling and plasma. The results showed that when the ratio of CBp to N326 was 40:15, the overall properties of NBR composites was better. Compared with the unmodified CBp/NBR composites, the change rate of tensile product, resilience and DIN abrasion of ball milling-plasma modified CBp/NBR composites in oil environment were reduced by 52.96%, 12.81%, and 27.19%, respectively, and the tear strength after double damage by high temperature and oil bath was increased by 15.63%, which resulted in better oil and high temperature-resistance. In summary, the ball milling-plasma combined with DPG/KH550 modified CBp can not only replace N326 carbon black, but also realize the preparation of NBR composites with better oil and high temperature-resistance.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Convenient synthesis of phthalonitrile-containing mono-benzoxazines with exceptional thermal stability and improved curing activity","authors":"Shuai Zhang,&nbsp;Yike Wang,&nbsp;Huachun Wang,&nbsp;Yifei Luo,&nbsp;Ao Yang,&nbsp;Jiajia Ye,&nbsp;Yumin Huang,&nbsp;Ju Fu","doi":"10.1002/app.56379","DOIUrl":"https://doi.org/10.1002/app.56379","url":null,"abstract":"<p>Simple synthesis and high performance are eternal pursuit for polymers. To lower the curing temperature, lower the melt viscosity and improve the processability of high performance phthalonitrile resins, a solvent-free method was applied to synthesize three from different phenols. Their chemical structure was confirmed by FTIR and NMR spectra, the curing behavior was investigated by DSC and rheology. It was found that the polymerization of phthalonitrile groups could be effectively promoted by benzoxazine moieties and the curing temperature of phthalonitrile groups dropped to around 240°C. Consequently, owing to the high curing reactivity, polymers obtained at relatively low curing temperature possessed high crosslinking density and extremely high thermal stability. P-apn-200, which was cured at 200°C, showed 5 wt% weightloss temperature (<i>T</i>_d5) of 472°C and char yield (<i>Y</i>_c) of 75.77% at 800°C. Moreover, the polymers obtained after curing at 280°C showed superior dimensional stability, CN-apn-280 showed extremely low linear expansion coefficient (CTE) of 10.7 ppm/°C. And <i>m</i>P-apn-280 showed HR capacity of 3.99 J/g‧K, peak HRR of 4.0 W/K and total HR of 0.8 kJ/g.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of polymeric nanoparticles with different functionalities to produce new biocatalysts","authors":"Stefanni S. Everton,&nbsp;Martina C. C. Pinto,&nbsp;Thalita Neves,&nbsp;Eliane Pereira Cipolatti,&nbsp;Evelin Andrade Manoel,&nbsp;Denise Maria Guimarães Freire,&nbsp;Martin Schmal,&nbsp;José Carlos Pinto","doi":"10.1002/app.56306","DOIUrl":"https://doi.org/10.1002/app.56306","url":null,"abstract":"<p>This study aimed to synthesize functionalized nanosupports via emulsion polymerization to develop new promising nanobiocatalyts via enzyme immobilizations. The co-monomers methyl methacrylate, divinylbenzene and the epoxy monomer glycidyl methacrylate (GMA) were used. The performance of the nanobiocatlysts was evaluated in hydrolysis and esterification reactions after the immobilization of lipase B from <i>Candida antarctica</i> (CAL B). Firstly, the nanosupports functionalized in situ with 25% and 50% w/w of GMA were successfully synthesized. In esterification reactions, the nanobiocatalysts containing 25% (w/w) of GMA were more active, achieving 254 U.g⁻¹, or an enzyme activity per area of 2.8 U.m⁻²; such value was higher than the one obtained when the commercial matrix Octadecyl Sepabeads was used (328 U.g⁻¹, 2.4 U.m⁻²). Such results point out that there is an optimum concentration of GMA epoxide groups that should be incorporated into the supports. The greater enzymatic activity obtained for 25% of GMA nanobiocatalyst was achieved not only because of their textural properties, but also due to a favorable interaction between the epoxide groups and CAL B. These results highlight the potential use of the heterofunctional matrices for the synthesis of new market-competitive biocatalysts.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A biodegradable bi-layer nano fibrous membrane fabricated by centrifugal spinning for active food packaging","authors":"Dongchen Chen,&nbsp;Yan Li,&nbsp;Jinzhe Li,&nbsp;Yaru Wang,&nbsp;Hao Ye,&nbsp;Mengyao Zhao,&nbsp;Wanjing Li,&nbsp;Bin Yang,&nbsp;Xianglong Li","doi":"10.1002/app.56342","DOIUrl":"https://doi.org/10.1002/app.56342","url":null,"abstract":"<p>To solve the problem of cytotoxicity for most antimicrobial agents loaded in packaging materials, we developed a novel bi-layer fibrous membrane by using centrifugal spinning, which of the outer layer was submicron native potato starch/polyvinyl alcohol (ST/PVA) composite fibers loaded with ZnO nanoparticles (ZnO NPs) for providing high antibacterial activity. The inner layer was nano-based calcium alginate/polyethylene oxide (CA/PEO) fiber for providing excellent biocompatibility. The addition of ZnO caused the semicrystalline structures of ST/PVA fibers, while the CA/PEO fibers were shown semicrystalline structures due to the PEO. Fourier transform infrared indicated that posttreatment had not effect on the structures of ST/PVA/ZnO fiber, but the structure of CA/PEO fibers were affected by interaction between COO<span></span> groups of alginate and Ca²⁺ ions. The results of mechanical property demonstrated that CA/PEO fibers showed highest stress of 3.83 ± 0.25 MPa and helpful for improving the stress of bi-layer fibrous membrane. The obtained fibrous membrane had excellent antibacterial property with diameters of bacteriostatic zone against <i>E. coli</i> and <i>S. aureus</i> of 20.5 and 21.5 mm, respectively. On this basis, the shelf life of strawberry was improved up to 6th day by inhibit the growth of microorganisms, which indicated that the obtained fibrous membrane showed great potential for food packaging.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crystallization-correlated phase separation of polypropylene random copolymers","authors":"Jiajun Guo,&nbsp;Liuxin Liu,&nbsp;Xiaoying Lu,&nbsp;Min Nie,&nbsp;Ying Wu,&nbsp;Jinyu Wu,&nbsp;Yuan Gao","doi":"10.1002/app.56371","DOIUrl":"https://doi.org/10.1002/app.56371","url":null,"abstract":"<p>Ethylene segments are incorporated into stereoregular propylene-propylene-propylene (PPP) homo-sequences to create locally disordered ethylene-propylene (EP) segments in polypropylene random copolymer (PPR) through a phase separation process, resulting in large quantities of spherical EP rubbery particles for improving impact toughness. However, the manipulation on size and distribution of these spherical EP rubbery phases remains insufficiently understood. In this study, the phase separation of PPR and the influence of crystallization on phase separation were investigated using rheological measurements and small-angle x-ray scattering (SAXS) methods. Combined with the isothermal crystallization method, phase separation was differentiated by the crystallization rate. The molecular chain states corresponding to different crystallization conditions were studied to interpret the varying rubbery particle sizes resulting from phase separation. The results showed that phase separation of EP segments from PPP is highly related to crystallization. Isothermal crystallization at temperatures ranging from 110 to 130°C leads to a high degree of phase separation due to the fast crystallization rate, as evidenced by the presence of small quantities of large pores in microscopic observations. This work provides insights into the phase separation of random copolymers and establishes correlations for manipulating the low-temperature toughness of PPR.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cover Image, Volume 141, Issue 43","authors":"Theogene Barayavuga,&nbsp;Cui Jianlei,&nbsp;Fengqi wei,&nbsp;Huanhuan Mei,&nbsp;Mostafizur Rahman,&nbsp;Zhijun Wang,&nbsp;Xuesong Mei","doi":"10.1002/app.54195","DOIUrl":"https://doi.org/10.1002/app.54195","url":null,"abstract":"<p>The cover image is based on the Article <i>Enhancing durable electrical conductivity in multiwalled carbon nanotubes-epoxy composites via laser repetition rate nanojoining for flexible electronics</i> by Theogene Barayavuga et al., https://doi.org/10.1002/app.56135.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"141 43","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.54195","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Poly(4-methoxyaniline) composites: Investigating structure–property relationship towards semiconducting applications","authors":"Diogo de Carvalho Menezes,&nbsp;Pedro Henrique de Oliveira Santiago,&nbsp;Paulo Nunes Souza,&nbsp;Marcelo Barbosa Andrade,&nbsp;Cristiano Luis Pinto Oliveira,&nbsp;Sérgio Michielon Souza,&nbsp;Edgar Aparecido Sanches,&nbsp;Yvonne Primerano Mascarenhas","doi":"10.1002/app.56313","DOIUrl":"https://doi.org/10.1002/app.56313","url":null,"abstract":"<div>\u0000 \u0000 <p>Conjugated polymers are essential materials for the organic optoelectronic industry, serving a pivotal role in cutting-edge technologies. In this study, we conducted an integrated characterization approach, including spectroscopic techniques coupled with X-ray diffraction analysis to explore the structure–property relationship of poly(4-methoxyaniline), commonly referred to as poly(p-anisidine) or PPA, along with two distinct ceramic composites: PPA/α-Al₂O₃ and PPA/Eu₂O₃. From powder X-ray diffraction analysis, a triclinic unit cell in space group P1 is proposed, after the whole powder pattern decomposition (WPPD) refinement is employed for the semicrystalline regions of the polymeric phases. Fractal-like structures are observed, following analysis of small-angle X-ray scattering (SAXS) data and scanning electron microscopy (SEM) from which we could infer the approximate sizes of the fractal clusters. Pure PPA displays a glass transition temperature (<i>T</i>_g) of approximately 80°C and an electrical conductivity slightly above 10⁻⁵ S/cm. In contrast, the composite materials do not exhibit a glass transition temperature but perform better in terms of crystallinity and thermal stability. PPA/Eu₂O₃ present conductivity enhancement exceeding tenfold, surpassing 10⁻⁴ S/cm. These findings provide the baseline for further explorations on the development of organic electronic devices and sensors.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}