JOURNAL OF APPLIED POLYMER SCIENCE
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2024
·Vol. 142
·期 3
·e56362
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IF 2.7
Tianbing Li,Xiaozhen Lu,Haonan Chen,Junlong Cai,Hongbo Gao,Xuewu Zhu,Jian Yu,Guangchao Li
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 (Ti 3 C 2 Tx 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.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 2
·e56338
·
IF 2.7
Zeyu You,Xiaoan Nie,Min Yu,Renli Fu,Jie Chen
A novel epoxy plasticizer (HCEP) with a hyperbranched polyglycerol structure was synthesized using reduced glycerol and cashew phenol as raw materials. Then it was grafted onto poly(vinyl chloride) (PVC) through click reaction to form self-plasticized PVC. The structure of the product was characterized with various methods. The effects of the degree of internal plasticizer substitution on the properties of PVC were tested through dynamic mechanical, mechanical property, and thermogravimetric analyses. The amorphous dendritic structure of HCEP effectively enhances the free volume of grafted PVC, leading to a reduction in the glass transition temperature and a significant enhancement in flexibility at room temperature. The maximum elongation at break is 289.89%. The grafting of plasticizers onto PVC avoids the leaching of plasticizers during usage, providing a viable solution for reducing reliance on phthalate-based plasticizers.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Jianhua Zhou,Yan Li,Sitong Li,Mengyuan Zhou,Kai Lu,Jiarui Yu
Light-responsive cellulose nanocrystal@polydopamine (CNC@PDA) modified fluorinated polyacrylate was synthesized by Pickering emulsion polymerization with light-responsive block copolymer modified CNC@PDA as stabilizer. The epoxy groups in poly(acrylic acid- co -acrylamide)- b -poly(glycidyl methacrylate)- b -poly(hexafluorobutyl acrylate- co -coumarin) amphiphilic triblock copolymer reacted with the hydroxyl and amino groups on the surface of CNC@PDA to form the modified CNC@PDA. The successful preparation of modified CNC@PDA was confirmed by means of FT-IR, XRD, TG, UV–Vis, surface tension measurement, and X-ray photoelectron spectroscopy (XPS) techniques. The results showed that the modified CNC@PDA had light-responsive and amphiphilic properties, and could be used as stabilizer to form stable Pickering emulsion. And the influence of modified CNC@PDA dosage on emulsion polymerization and film performance was systematically studied. The latex particle size decreased initially with increasing modified CNC@PDA dosage, from 0.6 to 1.0 wt%, and then increased. The mechanical, self-healing, and water–oil repellent properties of film were enhanced initially with increasing modified CNC@PDA dosage, from 0.6 to 1.0 wt%, and then declined. Atomic force microscope confirmed that the latex film had a rough surface. Moreover, the latex film comprising 1.0 wt% modified CNC@PDA presented not only high tensile strength (4.92 MPa), large elongation at break (657.70%), and superior oil/water repellency but also excellent self-healing property.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 31
·e55723
·
IF 2.7
Xiaoxuan Li,Zheng Yin,Yanru Zhao,Penghui Li,Shengli Wu
Isocyanate-based monomers and polymers have found widespread industrial application; however, the realization of green water-based products via the preparation of stable isocyanate aqueous emulsions remains challenging. Herein, a series of organosilicon and organofluorine synergistically modified amphiphilic branched polyurethanes (HBWPU), synthesized by grafting perfluorohexyl ethanol semi-terminated isophorone diisocyanate (IPDI) onto a hydrophilic polyurethane prepolymer, is presented. Subsequently, using a physical mixing method, stable diisocyanate emulsions are fabricated by preparing diisocyanate latex particles with IPDI as the core and hyperbranched water-based polyurethanes (HBWPU) as the shell. Structural investigations showed that the branching degree and fluorine content of the HBWPU significantly affects the stability of the diisocyanate emulsions. Increasing the degree of branching from 0.34 to 0.86 causes the amount of residual isocyanate ( NCO) groups to decrease from 20.1% to 16.7%. In contrast, an increase in the fluorine content from 0% to 17.8% increases the amount of residual NCO groups from 11.5% to 24.6%. Thus, HBWPU can be used as an emulsifier to prepare waterborne diisocyanate cross-linking agents. Such polyurethane-coated isocyanate aqueous emulsions can increase the hardness and significantly improve the acetone resistance of hydroxyl polyacrylate resins.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Jiaqi Huang,Jian Zhang,Xiujun Wang,Bo Huang,Zhao Hua,Shenwen Fang
Improving the stability of CO 2 foam is a core concern in CO 2 foam flooding oil recovery technology. Using hydrophobic nano-SiO 2 to enhance the stability of CO 2 foam is a common approach, but hydrophobic nano-SiO 2 faces challenges, such as easy aggregation, difficult dispersion, and performance needs to improve. In this article, a novel dispersion of styrene-phenylamine monomer copolymer (PSSN) nanosphere with primary amine groups on the surface was synthesized. The synthesis conditions of PSSN were optimized, and its performance for stabilizing CO 2 foam was evaluated. The experimental results demonstrated that PSSN had better performance for stabilizing CO 2 foam than that of hydrophobic nano-SiO 2 when using cocamidopropyl betaine (CAB) as the foaming agent. With the CAB concentration of 4000 mg/L and PSSN concentration of 100 mg/L in the brine having salinity of 8460 mg/L, the half-life of CO 2 foam at 90°C was 131 min, which was 43 min longer than that stabilized by hydrophobic nano-SiO 2 under the same conditions. This is for the first time that polystyrene microspheres with amine groups on the surface was used to stabilize CO 2 foam. The study provides a new nanoparticle option for stabilizing CO 2 foam.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 23
·e55480
·
IF 2.7
Chuan Yan,HongHua Wang,LiXin Song,GuangYuan Zhou
Aiming at the problem of phase separation between thermoplastic toughener and epoxy after curing, which leads to the reduction of mechanical properties, in this paper we improve the compatibility of the two phases by introducing reactive groups into the molecular chain of thermoplastic resins, thus improving the impact strength of the epoxy system. Phenolphthalein polyether sulfone (C-PESC) with designable and controllable carboxyl group content was prepared via SN 2 nucleophilic substitution copolymerization. Further C-PESC was evaluated for epoxy toughening, and the effects of carboxyl group content of C-PESC on mechanical properties and thermal stability of the resin system were investigated. The results show that C-PESC resin has good compatibility with E51 epoxy resin. Carboxyl group accelerates the dissolution rate of thermoplastic resins in epoxy and also participates in the curing reaction with epoxy to enhance the interfacial bonding ability between the toughening component and the matrix resin. The reactive toughener C-PESC can not only improve the impact properties of E51 epoxy, but also maintain the high T g and thermal properties of the resin system. Among them, the addition of 5 PHR of C-PESC3 increased the impact strength of the modified resin by 45%, with uniform fracture surface and tough fracture shape.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yilin Li,Jinsheng Duan,Zhaogang Liu,Feng Guo,Peijie Jia,Junchang Fan,Shuxin Wu,Yanhong Hu,Jinxiu Wu,Xiaowei Zhang,Jianfei Li
To address the thermal instability of polyvinyl chloride (PVC) and the environmental risks of conventional stabilizers, cyanurate-intercalated layered double hydroxides (LDHs), including MgAl-LDH (MA), La-doped MgAl-LDH (MAL), and Ca/La-doped MgAl-LDH (CMAL), were synthesized. Comprehensive XRD, FTIR, TGA, and SEM characterization confirmed the structural integrity of the samples. These LDHs were incorporated into PVC to fabricate composite materials, whose thermal stabilization efficiency was systematically evaluated through accelerated aging, Congo red, and dynamic thermal stability tests. Thermogravimetric analysis revealed that CMAL/PVC exhibited the highest initial decomposition temperature (281°C), surpassing MA/PVC (270°C), MAL/PVC (274°C), and neat PVC (256°C). Consistent enhancements were observed in color retention and HCl scavenging capacity, which correlated with increased thermal degradation resistance. Mechanistic studies demonstrated that cyanuric acid-modified LDHs effectively suppressed autocatalytic HCl elimination and conjugated polyene formation during the thermal aging process at 180°C and the HCl absorption experiment. The multimetal synergy in CMAL enhanced Cl − coordination and acid neutralization, thereby inhibiting PVC degradation cascades. This work provides fundamental insights into designing eco-friendly LDH-based thermal stabilizers for high-performance PVC applications, demonstrating significant potential for sustainable polymer engineering.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Hao Zhang,Shengtai Zhou,Liwei Yan,Mei Liang,Huawei Zou
This study relies on the high ablation resistance strategy of char layer expansion ceramization to strengthen the char layer and improve ablation performance. The use of phase change material, that is, paraffin wax, was effective in simultaneously improving the ablation resistance and thermal insulation performance of liquid methyl vinyl silicone rubber (LMVSR) composites, which was attributed to the low density, enhanced char layer, and improved heat-absorption capacity. The introduction of paraffin wax lowered the ablation temperature and increased the specific heat capacity of LVMSR-based composites, thereby enhancing heat dissipation and reducing thermal erosion. In addition, paraffin wax was able to promote the ceramization reaction. The mass erosion rate, pyrolysis rate, and graphitization degree of the char layer were significantly improved when the content of paraffin wax was increased from 5 to 15 phr. The composites with 15 phr paraffin wax demonstrated the best performance and the highest modification effect. The paraffin modification was effective in reducing the mass ablation rate, especially at 10 phr, which showed a decrease of 34.43% when compared with that of the L-P0 counterpart. The maximum back-face temperature was reduced by 29.63% upon adding 15 phr paraffin wax when compared with L-P0, exhibiting excellent thermal insulation performance. The above results showed that the ablative resistance, internal erosion resistance, and thermal insulation properties of silicone rubber-based composites were significantly improved by using the strategy of expansion ceramization and enhanced heat absorption/dissipation by adding phase change materials, which shows potential application in preparing flexible thermal ablative material for thermal protection purposes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Mengke Liu,Shiqiang Wang,Mengbai Ma,Tianrun Yuan,Xiaolei Bi,Bin Tao,Xiaobin Liu,Zhe Yang
The integration of intermittent renewable energy with alkaline water electrolysis (AWE) for green hydrogen production has emerged as a critical technological trend. However, conventional hydrophobic polyphenylene sulfide (PPS) diaphragms suffer from high ionic resistance and excessive gas crossover under low/variable load operations and rapid start-stop cycles, leading to elevated energy consumption and critical safety risks. Herein, we engineered a hydrophilic graphene oxide (GO)-modified composite diaphragm via a scalable one-step phase inversion casting process. The composite diaphragm integrates a robust PPS fabric support with a functional layer comprising polysulfone (PSU), zirconia (ZrO 2 ) nanoparticles, polyvinylpyrrolidone (PVP), and GO. The synergistic interaction between GO nanosheets and PVP enhances hydrophilicity, optimizes pore architecture, and improves gas-blocking performance. The resulting diaphragm demonstrates an ultralow area resistance of 0.11 Ω·cm 2 and an elevated bubble point pressure of 2 bar. At 2 V, the PVP/GO-modified composite diaphragm reached 600 mA cm −2 . It demonstrated stability over 200 h at 80°C in 30 wt% KOH under 300 mA cm −2 constant current. This work provides a scalable and efficient strategy for designing high-performance diaphragms that harmonize hydrophilicity, ionic conductivity, and gas-blocking capabilities, demonstrating significant potential for efficient hydrogen production.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yong Yang,Qingliang Meng,Zhenghong Guo,Juan Li,Zhengping Fang
A series of bio-based 2,5-thiophenedicarboxylates were successfully synthesized, and their chemical structures were characterized using Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR). The influence of alkyl chain length and branching on the plasticizing properties of 2,5-thiophenedicarboxylates in poly(vinyl chloride) (PVC) was evaluated through dynamic mechanical analysis (DMA), hardness measurements, and tensile testing. It was found that the plasticizing efficiency of 2,5-thiophenedicarboxylates decreased as the alkyl chain length increased, as reflected by the gradual increase in glass transition temperature ( T g ), hardness, and elastic modulus. Additionally, among 2,5-thiophenedicarboxylate isomers with the same molecular weight, those with branched alkyl chains exhibited superior plasticizing efficiency compared to those with linear alkyl chains. The above results suggested that optimizing alkyl chain length and branching could further improve the plasticizing efficiency of 2,5-thiophenedicarboxylate plasticizers in PVC. Notably, 2,5-thiophenedicarboxylates showed greater polarity and improved migration resistance in non-polar solvents than commercial dioctyl phthalate (DOP), suggesting their potential application in PVC products exposed to non-polar environments.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Ming Gao,Teng Feng,Xiaoqian Zhang,Junfei Li,Ligang Tang,Donghua Liu,Xuan Zhou,Fengwen Yao
Solid superacid possesses high acidity and thermal stability, which can effectively improve the flame retardant properties of materials by promoting catalytic dehydration and charring. On the other hand, montmorillonite (MMT) has a good synergistic effect with the flame retardant due to its unique two-dimensional nanosheet structure. To combine both advantages to get high performance, in this study, a solid superacid structure was introduced into the MMT to obtain a montmorillonite solid superacid (Ti-MSS). Its structure, morphology, and acidity were characterized by XRD, EDS, TEM, and Hammett indicator method. This Ti-MSS was then combined with ammonium polyphosphate (APP) for the flame retardant treatment of unsaturated polyester resin (UPR). The results showed that when the UPR composite containing 0.1 wt% Ti-MSS and 9.9 wt% APP, its limiting oxygen index (LOI) value reached 28.9%, and UL-94 achieved a V-0 rating. CCT data showed that, compared with the APP/UPR composites, the peak heat release rate and total heat release were reduced by 8.99% and 12.47%, respectively. Moreover, smoke and gas release were also reduced after the addition of Ti-MSS. TG, SEM, XPS, and Raman data results showed that Ti-MSS promoted carbonization of the UPR to obtain more residual char and make it more continuous and denser. It was suggested that Ti-MSS had a good synergistic flame retardant effect with APP on UPR.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xian Cheng,Wenhao Zhang,Chenxi Wang,Shuo Chen,Zihao Tang,Leyuan Zhang
Polyimide (PI) has been extensively employed in flexible insulation applications for electrical equipment due to its exceptional mechanical properties, thermal stability, and superior electrical insulation performance. This study employed two-dimensional (2D) tungsten disulfide (WS 2 ) with varying surface dimensions and thickness to modify PI for the first time, exploring the mechanism of the interfacial effect of WS 2 in the matrix on the performance enhancement of composite films. The 2D WS 2 , owing to its low interlayer friction characteristics and the formation of a continuous interfacial phase within the polymer matrix, facilitates efficient stress transfer between the filler and matrix. Additionally, the high thermal conductivity of WS 2 mitigates localized overheating, which in turn increases the thermal decomposition temperature of the polyimide film. Moreover, the uniformly dispersed lamellar architecture introduces a high density of interfacial charge traps; the confinement effect of these traps on the charge effectively inhibits the development of discharge channels. The WS 2 /PI composite film prepared by in situ polymerization shows excellent performance, with significant increases of 162.9% in elongation at break and 12.8% in breakdown strength. This work provides critical insights into the design and preparation of advanced flexible insulating materials for high-voltage electrical applications.
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高影响因子
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