JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 43
·e57679
·
IF 2.8
Wenchao Shi,Xuanlin Li,Shili Zhao,Tian He,Bi Yang,Beibei Chen
Developing low-friction, high wear-resistant epoxy-based self-lubricating composites is crucial for reducing friction and wear in transmission components of advanced equipment. However, the shortcomings of brittleness in hence and poor wear resistance of epoxy limit its tribological application under harsh sliding conditions. In this study, the nanohybrid of h-BN nanosheets (BNNSs)-supporting-α-Fe 2 O 3 was designed to harness their synergistic reinforcement and lubricating effect on the tribological performance of epoxy. The feature of α-Fe 2 O 3 /BNNSs was analyzed, and its tribological enhancement on epoxy nanocomposites was explored systematically. Results demonstrated that the α-Fe 2 O 3 of size less than 50 nm was uniformly loaded on the BNNSs surface to form a rough microstructure, which was conducive to perfecting the interfacial compatibility of the epoxy composite. Moreover, the α-Fe 2 O 3 /BNNSs significantly improved the capacity for antifriction and anti-wear of epoxy. Only by filling 0.7 wt% α-Fe 2 O 3 /BNNSs, the coefficient of friction (COF) of the corresponding composite coating was reduced by 85.1%, and its wear rate was significantly reduced, nearly 96.7%. More importantly, the epoxy-0.7 wt%α-Fe 2 O 3 /BNNSs kept reasonable tribological performance under high loads/speeds. By analyzing the worn surface of friction pairs, the tribological synergism of α-Fe 2 O 3 /BNNSs on epoxy coatings was discussed. This study might offer novel insights into the design of high-performance epoxy self-lubricating nanocomposite coatings.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Wei Zhao,Yifan Song,Zhen Song,Jiaxin Li,Yuanjing Zhang,Wenxia Zhao,Huaijun Chen,Yangyang An,Ziyan Wang,Siyu Ma,Haoxian Li,Wenzhuo Ma,Kaihong Hui
Polycarbonate-acrylonitrile-butadiene-styrene (PC-ABS) has been treated with an aqueous solution of N -methylpyrrolidone (NMP) and ethanol (C 2 H 5 OH) under conditions that achieve a controlled level of polymer swelling. In addition, the micro-etching effect of alkaline potassium permanganate on PC-ABS was investigated using a low environmental impact binary micro-etching system. The effect of NaOH concentration, etching time, and temperature on surface roughness, morphology, wettability, and PC-ABS adhesion strength has been examined. The PC-ABS surface characteristics were analyzed using field emission scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform-infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results have demonstrated that the surface morphology was altered after micro-etching, with an increase in surface roughness ( R a ) from 9.69 to 316 nm. In addition, the contact angle decreased from 92.2° to 30.1°, and the adhesion strength increased to 0.88 kN/m. The findings of this study have established an effective micro-etching process using alkaline potassium permanganate that enhances the wettability, surface roughness, and adhesion strength of the PC-ABS copolymer.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 17
·e56781
·
IF 2.8
Yanru Chen,Linbo Wu
2,2,4,4-Tetramethyl-1,3-cyclobutanediol (CBDO) based copolyesters like poly(cyclohexane dimethylene-co-2,2,4,4-tetramethyl cyclobutylene terephthalate) (PCcBT) has high transparency, heat-resistance and safety and has been commercialized to replace bisphenol A polycarbonate in food contact applications. However, its synthesis and processing suffer from CBDO sublimation, composition deviation and relatively poor thermal stability. In order to obtain transparent heat-resistant CBDO-based copolyesters with improved synthesis robustness and thermal stability, poly(ethylene co-tetramethyl cyclobutene terephthalate (PEcBT)) copolyesters were synthesized from ethylene glycol (EG), CBDO, and terephthalic acid (TPA) via direct esterification route, and the structure–property was studied. It is found that the presence of EG effectively inhibited the sublimation of CBDO, and the resulting PEcBT copolyesters had reasonably good thermal stability so that the melt polycondensation proceeded smoothly without serious foaming. PEcBT copolyesters with intrinsic viscosity ([η]) over 0.60 dL/g were successfully synthesized at copolymer composition ( ϕ cBT ) up to 67 mol%. A quantitative relationship between T g and its influence factors is established. The copolyesters with ϕ cBT of 48–62 mol% displayed T g of 126°C–144°C, flexible tensile behavior, satisfactory tensile properties and reasonably good impact performance. Ternary PEPecBT copolyesters were also synthesized using 1,5-pentanediol as another diol comonomer to improve toughness of the materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 14
·e56693
·
IF 2.8
Zi-Ang Xia,Long Wang,Chaojie Li,Xue Li,Jingxue Yang,Baoming Xu,Heng Zhang
The augmentation of chitosan's (CS) antioxidative and antibacterial properties via grafting with phenolic acids constitutes a significant method for expanding the utility of chitosan. In this investigation, four phenolic acids (gallic acid, GA; protocatechuic acid, PCA; hydroxybenzoic acid, HA; and salicylic acid, SA) were conjugated with CS utilizing carbodiimide (EDC)-mediated grafting. The resultant phenolic acid-CS graft copolymers underwent characterization employing infrared spectroscopy, x-ray diffraction, and thermogravimetric analysis. Furthermore, ex vivo antioxidative and antibacterial assays were performed. Findings revealed that among the synthesized phenolic acid-chitosan graft copolymers, gallic acid-chitosan (GA-CS) demonstrated the highest antioxidative and antibacterial efficacy, primarily attributed to its elevated grafting ratio and abundance of hydroxyl groups. The antioxidative and antibacterial performances of the remaining three graft copolymers followed this order: CS-PCA > CS-HA > CS-SA, aligning with the trend in grafting ratios. This correlation arises from the higher grafting ratios of copolymers yielding more active OH groups, thereby exhibiting enhanced antioxidative and antibacterial properties. Phenolic acid-chitosan graft polymers exhibit promising antioxidative and antibacterial attributes, making them suitable additives for application in the food preservation packaging industry.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Jiayao Wang,Jingguo Li,Shaokui Cao,Yingliang Liu,Jun Shi
In recent years, the remotely multi-responsive chitosan (CS) hydrogel has been garnering extensive attention owing to its remarkable potential in biomedical applications. Meanwhile, it presents a wide range of uses in the realm of controlled drug delivery and photothermal chemical combination therapy. In this paper, the CS/β-glycerophosphate disodium salt (β-GP) physical crosslinked network was employed as the framework to encapsulate near-infrared (NIR) responsive hollow copper sulfide (CuS)/polydopamine (PDA) nanoparticles, and the NIR/pH synergistic responsive CS/CuS/PDA hydrogel was fabricated. The negatively charged β-GP, along with the hollow CuS/PDA nanoparticles, played a key role in promoting the creation of abundant electronegative cavities. As a result, the hybrid hydrogel achieved an impressively high DOX loading rate, reaching up to 95.5%. The CS/CuS/PDA hydrogel exhibits excellent pH responsiveness, which could be attributed to the disintegration of the CS/β-GP network under acidic buffer solution. In addition, hollow CuS/PDA nanoparticles embedded in the hydrogel endow the hydrogel with excellent NIR photothermal responsiveness, which significantly promotes the release of DOX. Consequently, the CS/CuS/PDA hydrogel reveals excellent synergistically enhanced NIR, pH, and thermal triple-responsiveness, indicating its tremendous promise in the field of controlled drug release.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Chaoquan Wei,Yu Han,Ting Wang,En Zeng
To overcome the persistent issue of poor water resistance in single-component waterborne automotive varnish coatings, a novel AAEM (acetoacetoxyethyl methacrylate)-modified acrylic resin has been developed for single-component, waterborne automotive coatings, delivering exceptional improvements in water resistance, thermal stability, and corrosion protection. By precisely adjusting the ratio of methyl methacrylate to butyl acrylate and integrating methacrylic acid and N , N -dimethylethanolamine to enhance hydration stability, the resin achieves optimal hardness, flexibility, and adhesion. The incorporation of 10% acetoacetoxyethyl methacrylate dramatically enhances water resistance, extending beyond 10 days, while improving thermal durability and barrier performance, as confirmed by thermogravimetric and electrochemical analyses. Remarkably, the varnish achieved a high crosslinking density at just 110°C, resulting in a durable coating with 2H hardness. These advancements deliver superior weatherability and longevity, positioning this eco-friendly varnish as an innovative solution that meets the automotive industry's growing demand for sustainable, high-performance coatings.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Lele Liu,Aofei Li,Xiaogang Luo,Xuejing Zheng,Keyong Tang,Ying Pei
The cross-linked collagen sponge (CCS) was fabricated by crosslinking mesoscopic collagen fibrils using glutaraldehyde as a crosslinking agent. The structure of CCS was analyzed using scanning electron microscopy (SEM), Fourier infrared spectroscopy (FTIR), and thermal analysis (TA). Static adsorption experiments were conducted with Congo red (CR) as an anionic dye model to assess the adsorption capability. The findings indicate that the adsorption behavior of CCS follows the Langmuir isothermal adsorption model, quasi-second-order kinetic model, and molecular diffusion model. At 333 K, CCS demonstrates a remarkable maximum adsorption capacity ( Q max ) of 232.1 mg/g, surpassing other reported bio-based materials in terms of its exceptional performance as an adsorbent. Thermodynamic analysis confirms the spontaneous uptake of CR by CCS. Additionally, repeated tests involving both adsorption and desorption validate the outstanding stability and reusability of CCS for sorption of anionic dyes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Chunyuan Huang,Xindan Dai,Xiang Shao,Peicheng Xu,Miao Cao,Wen Wu
The growing demand for flexible electronic devices in diverse applications has driven increased attention to conductive polymer-based materials. In this study, we fabricated composite hydrogel fibers with excellent conductivity and sensing stability via wet spinning using sodium polyacrylate (PAAS), sodium alginate (SA), and graphene oxide (GO). The effects of polymer mass ratio, conductive particle concentration, and cross-linker on fiber performance were systematically investigated through orthogonal experiments. Optimal conductivity and elastic modulus were achieved at PAAS/SA = 1:1, CaCl 2 = 3%, and GO = 0.05 g. The intrinsic correlations between morphology/thermal properties (characterized by SEM, FTIR, and TG) and comprehensive performance were elucidated. Electromechanical tests and human motion sensing trials demonstrated excellent sensing sensitivity (GF = 3.17) and stability within a 0% – 100% strain range.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Mingwang Fan,Zengfu Jiao,Xinjie Sun,Shilong Cong,Lingli Jia,Xia Liu,Runbin Xue,Yanfu Pi,Jun Xu
In this study, poly(octadecyl acrylate-co-maleic anhydride) (POM) was synthesized via reversible addition–fragmentation chain transfer (RAFT) polymerization, followed by grafting green biomass with maleic anhydride. The chemical structures of the synthesized polymers were characterized by Fourier transform infrared spectroscopy (FT-IR), Proton nuclear magnetic resonance ( 1 H NMR), and Gel permeation chromatography (GPC). The effects of these polymers on the crystallization behavior and cold flowability of waxy crude oil were examined using X-ray diffraction (XRD), differential scanning calorimetry (DSC), polarized light microscopy, and rheological analysis. Addition of octadecyl acrylate-maleic anhydride glyceryl monostearate (OM-GMS) the crystallization activation energy increasing largely from 1.422 to 8.420 kJ mol −1 . When POM was grafted with saturated fatty acids, the crystallinity index ( CI ) decreased by 4.14% compared to unsaturated fatty acids. Viscosity first decreased by 95.4% with OM-GMS addition, then increased with more long-chain alkanes in glyceride. Viscosity first decreased and then increased with increasing grafting rate. At a grafting ratio of 0.4, viscosity decreased by 93.4%. Incorporating green biomass into polymer design is recommended to further reduce reliance on fossil fuels. Future efforts should prioritize replacing conventional monomers in pour point depressants with sustainable biomass-based alternatives, enhancing crude oil flowability while advancing environmental stewardship.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Fangzhou Hu,Xin He,Weize Lv,Yong Fang,Guodong Jiang,Yucai Shen
Manganese phytate decorated kaolinite (PA-Mn@Kaol) was synthesized as a novel flame retardant synergist in combination with piperazine pyrophosphate (PAPP) for polyethylene (PE). It demonstrated that the addition of PA-Mn@Kaol significantly reduced the total heat release, peak heat release rate, and total smoke production. Notably, the fire growth index (FGI) of PE/PAPP/PA-Mn@Kaol composites decreased by 66.7% relative to the PE/PAPP composite, and the PE/PAPP/PA-Mn@Kaol composites had great advantages in terms of FGI and fire performance index compared to other PE/intumescent flame retardant systems reported in the literature. Moreover, the gas and condensed phases fire retardant mechanisms of the PE/PAPP/PA-Mn@Kaol composite were explored. This study presented a viable approach for designing synergistic fire retardants, effectively enhancing the fire safety performance of PE.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xiongfei Zhang,Yana Shi,Chunxiao Qu,Xiang Shi,Qianya Tan
Various recycling methods of epoxy resins were proposed, but they most involve harsh reaction conditions. Herein, it was reported on a mild and efficient method for the complete degradation of amine cured epoxy resin, and it explored the potential reuse of the degradation products. Formic acid was used as a swelling agent, and a mixture solution of nitric acid and acetic acid served as an oxidizing agent. The amine cured epoxy resin was completely degraded at 100°C within 40 min, and the degradation yielded oligomers with high molecular weight. The degraded oligomers were used as fillers to make new epoxy materials with fresh epoxy resins. The mechanical properties and the thermal stability are similar to those of the original epoxy resins. This work provides a mild but efficient way to dispose of waste epoxy products under mild conditions.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhen-wei Guo,Yan-fen Mo,Meng-yuan Luo,Yu-hui Xie,Dong Feng,Feng Wu,Yi Mei,Delong Xie
Ammonia is commonly used as a preservative for natural rubber, but its high volatility and strong irritation to the human respiratory tract pose significant health risks. In this study, we utilized the layered two-dimensional nanomaterial Ti 3 C 2 T x (MXene) as an antimicrobial agent and synthesized MXene-SiO 2 nanocomposites by intercalating KH550-modified silica nanoparticles into MXene. This nanocomposite was then incorporated into a MXene-SiO 2 /low-ammonia preservation system. The results demonstrated that this novel system effectively preserved concentrated natural latex over a four-month period. Throughout this time, the volatile fatty acid (VFA) values remained below 0.1, the pH was stable at approximately 10, the mechanical stability time (MST) exceeded 700 s, and viscosity remained around 300 mPa·s—meeting the requirements for subsequent processing. The introduction of the MXene-SiO 2 nanocomposite into the preservation system had no adverse effects on the structure or performance of the dry film. The system exhibited excellent film-forming properties and promoted the formation of a cross-linked network in the vulcanized film. As a result, the tensile strength of the vulcanized film reached 22.87 MPa, a 64% increase compared to pure natural latex vulcanized film. this study provides an effective and environmentally friendly approach for preserving natural latex while simultaneously enhancing the mechanical properties of its vulcanized film.
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高影响因子
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