JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 4
·e56423
·
IF 2.7
Xinqiu Hong,Haifeng Li
Polyvinyl alcohol (PVA) fibers were manufactured by gel spinning with reinforcing of attapulgite (ATT) and cross-linking of boric acid (PVA/B/ATT fibers), in order to improve the mechanical properties. Furthermore, the final fibers were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR), differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), powder x-ray diffraction (XRD) and tensile strength tester. In addition, when ATT amount was no more than 2.0 wt%, FTIR analyses suggested that the degrees of cooperation combining of ATT and boric acid with PVA macromolecules were enhanced. SEM images indicated that PVA/B/ATT fibers had smooth surfaces. DSC, TGA and XRD results illustrated that the melting temperatures and maximum thermal decomposition temperatures first increased and then dropped as the content of ATT increased. Moreover, mechanical properties results indicated that the optimal ATT amount was 2.0 wt%, and the tensile strength of PVA/B/ATT-2 fiber reached the highest of 14.2 ± 0.3 cN/dtex. It was largely because that the cooperation combining of boric acid and ATT with PVA molecules improved the mechanical properties of PVA/B/ATT fibers.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Haosen Ma,Zhenyu Zhang,Yu He,Yan Zhou,Xiwen Zhang,Xiangdong Liu,Yuming Yang
This study introduces a series of novel passive-cooling polyurethane materials (SiTPUs) by incorporating hydroxybutane-terminated polydimethylsiloxane (OH-PDMS)/polytetrahydrofuran (PTMG)-mixed soft segments. Wide-angle x-ray scattering (WAXS) and small-angle x-ray scattering (SAXS) analyses revealed that with an increase in the OH-PDMS content, the material exhibited enlarged grain sizes, reduced crystallinity, and the formation of larger-sized microphase “structures with different compatibilities. The sample with a PDMS proportion of 40% (SiTPU-40) demonstrates outstanding passive cooling performance, achieving a reflectance of 70.2% in the solar spectrum and a high atmospheric window emissivity of 91.6% without needing metal additives, resulting in a cooling effect of 10.8°C compared with that of pure thermoplastic polyurethane (TPU). Static contact angle tests indicated that introducing OH-PDMS considerably enhanced the self-cleaning performance of the material, with a PDMS proportion of 50% (SiTPU-50) achieving the highest contact angle of 112°. Overall, this multi-soft segment design optimizes passive cooling performance and enhances self-cleaning capabilities, thus offering new possibilities for extensive material applications, especially in wearable technology and architectural surface coatings.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yuansong Ye,Yuchi Zhang,Huazhong Wu,Run Fang
Herein, a cationic hydrogel microsphere (CHMS) was prepared by inverse suspension polymerization and freeze-drying and was applied to the adsorptive removal of hexavalent chromium (Cr(VI)) from aqueous solution. Morphological characterization shows that there are lots of folds and pores on the surface of CHMS with a unique petal-like appearance. According to the chemical structure analysis, CHMS contains plenty of functional groups such as amine and hydroxyl groups. These features give CHMS a larger specific surface area, faster adsorption rate, and higher adsorption capacity than the conventional cationic hydrogel microparticle (CHMP) adsorbent. The adsorption of Cr(VI) in water by CHMS is mainly based on the combination of electrostatic adsorption and redox reaction, with the electrostatic interaction between the protonated amine and Cr(VI) serving as the predominant adsorption mechanism. Experimental results reveal that CHMS can efficiently remove Cr(VI) from simulated wastewater in both batch and continuous adsorption modes, which is primarily due to its distinctive surface morphology and rich functional groups. Furthermore, the common coexisting metal ions in Cr(VI)-containing wastewater have no substantial negative influence on the adsorption. Therefore, it can be concluded that CHMS has a promising application prospect in the treatment of Cr(VI)-containing wastewater.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Mingxing Chen,Jiawang Sun,Qian Hu,Xinya Wang,Wei Zhang,Yonggui Li
Particulate matter (PM) pollution is widely recognized as a major threat to public health, making the development of thermally stable filters for particulate removal in high-temperature environments critically important. However, the common polymer-based nanofiber air filters are inadequate stability when exposed to high temperature. In this study, the poly (m-phenylene isophthalamide) (PMIA) and nano barium titanate (BaTiO 3 ) which showed remarkable thermal endurance was utilized to prepare the PMIA/BaTiO 3 composite nanofiber air filter. The structure and performance of nanofibers were regulated by changing the addition of BaTiO 3 . The PMIA/BaTiO 3 nanofiber air filter with nano-protrusion structure exhibits high PM2.5 filtration efficiency (98.7%) and low pressure drop (60.4 Pa). Even after being exposed to treatment at 250°C, the PMIA/BaTiO 3 composite nanofiber air filter can still maintain stable filtration performance. The results showed that PMIA/BaTiO 3 nanofiber materials hold promise for eliminating particulate matter in high-temperature environments.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Tengfei Cai,Fangzheng Li,Chen Qian,Chen Shi,Jian Han
The mismatch of flame retardancy and mechanical properties is still a challenge for developing high-performance epoxy resin (EP) and its aramid fiber (AF) composite. In this study, bi-DOPO compound (ABD) was prepared by reacting DOPO with acrolein, Na-MMT was modified by octadecyltrimethylammonium chloride to prepare organic MMT(@MMT), and finally, ABD-@MMT nano-flame retardant was prepared by using ABD to intercalate @MMT to solve this problem. After introducing ABD-@MMT into AF/EP composites, it exhibited good thermal stability, excellent flame retardancy, and enhanced mechanical properties. The intercalation and exfoliation of the @MMT layer within the ABD and EP matrix indicated a uniform dispersion of the flame retardant. Especially for the sample of 3%ABD-@MMT/AF/EP composites, the limiting oxygen index (LOI) value increased from 23.8% to 34.7% accompanied by the V-0 rating in the UL-94 test. Scanning electron microscopy (SEM) analysis of residual carbon postcone calorimetry test and the degree of graphitization after muffle calcination supported the superior flame retardant properties of ABD-@MMT nanocompounds. Furthermore, the tensile strength of 3%ABD-@MMT/AF/EP composites measured at 38.3 MPa, representing an 8.5% increase compared to 3%ABD/AF/EP, only decreased by 7% compared to pure AF/EP composites. The incorporation of ABD-@MMT improved both the burning behavior and mechanical properties of the composite, reflecting reduced burning intensity, increased tensile strength, and impact strength. This study presents a novel approach for developing AF/EP composites with enhanced mechanical strength and flame retardancy.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Wenjian Li,Fubin Luo,Yumei Dai,Denglong Chen,Hongzhou Li
In this study, to improve the flame-retardant properties of ramie fabrics (RFs), a polyelectrolyte complex (PEC) was prepared in a one-step process using biobased guar gum (GG), polyethyleneimine (PEI), and ammonium polyphosphate (APP) and deposited on the surface of the RF to construct an intumescent flame-retardant coating. Fabrics treated with PEC coatings exhibited excellent flame-retardant properties. Specifically, the cone calorimeter test results revealed that an increase in sample weight of only 13.23 wt% resulted in significant reductions in the peak heat release rate (pHRR), total heat release (THR), and fire growth rate (FGR) of 91.37%, 65.12%, and 95.28%, respectively. Additionally, the limiting oxygen index (LOI) increased from 19.4% to 33.5%, and the fabrics self-extinguished immediately after the ignition source was removed during the UL-94 test. Scanning electron microscopy (SEM) of the char residue revealed expansion bubbles on the surface, suggesting that the PEC coating provides flame retardancy through a synergistic effect involving both the gas phase and the condensed phase. This study provides a simple and convenient solution for realizing green and efficient flame-retardant coatings on RF.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Minghang Yang,Qiongxia Liu,Mingguang Zhang,Yu Deng,Cheng Liu,Fangyuan Hu,Xigao Jian,Yousi Chen
The rapid development of flexible electronic devices has placed higher demands on the development of high-performance flexible supercapacitors. In this work, a safe and simple method was developed to prepare cobalt–nickel layered double hydroxide (CoNi-LDH) flexible electrodes. Metal–organic framework (MOF)-derived CoNi-LDH was successfully grown on the surface of polypropylene nonwoven flexible carbon fiber membranes through plasma oxidation treatment, grafting of cobalt-based MOFs, and room-temperature etching in Ni 2+ solution. The prepared flexible modified carbon fiber membrane (CPO-CoNi-40-0.5) has good mechanical properties with a tensile strength of 159.26 ± 63.03 kPa. In addition, the CPO-CoNi-40-0.5 electrode has a high specific capacitance of 580 F g −1 at 1 A g −1 . The assembled supercapacitor maintains 99% of the initial specific capacity after 7000 cycles and 98% of the initial specific capacity when it is folded at 90°, showing excellent long cycle stability and bending resistance. This paper provides a new way to promote the development of high-performance and low-cost flexible electrodes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Xiangliang Zhang,Yu Zhang,Xiaohong Li,Zhijun Zhang,Zhiwei Li
To address the shortcomings of poor thermal stability, easy migration, and over-plasticization of the liquid organic phosphorus flame retardant, cresyl diphenyl phosphate (CDP), we employed halloysite nanotube (HNT) as a carrier to load CDP, thus forming a novel composite (HNT-CDP). The results demonstrated that the CDP loaded into HNT channels was 41 wt%. HNT-CDP composites exhibited higher thermal stability, water resistance, and flame retardancy than mixtures of HNT and CDP in epoxy resin (EP). With a loading of 15 wt%, the limiting oxygen index of EP/HNT-CDP increased to 48.3 and achieved a V-0 rating in UL94 tests. Additionally, HNT-CDP exhibited better inhibitory effects on the peak heat release rate and total heat release of EP, as well as a longer time to ignition, compared with the mixture. Moreover, as opposed to EP/HNT + CDP, EP/HNT-CDP exhibited a significant 114.5% increase in tensile strength. These excellent thermal, water resistance, and mechanical properties can be primarily attributed to the loading of CDP by HNT channels. HNT effectively utilizes the channel confinement effect to isolate CDP from directly interacting with EP. The outstanding flame retardancy is mainly due to the synergistic effect between HNT and CDP after the formation of the composite.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
YuMei Luo,QingGuo Shang,Hua Hu,Xiaodong Bai
In order to reduce the economic loss caused by well leakage and the lag of drilling progress, it is very important to use plugging materials reasonably and effectively. Expandable polymer materials can better fill cracks and holes of different sizes by absorbing water expansion and deforming. In this article, an expandable polymer plugging agent (PSMAN) was prepared by soap-free emulsion polymerization using methyl methacrylate (MMA), styrene (St), 2-acrylamide-2-methylpropanesulfonic acid (AMPS) as reaction monomers, N -hydroxymethyl acrylamide (NMA) as a cross-linking agent, and ammonium persulfate (APS) as initiator. The optimal synthesis conditions were determined by designing the orthogonal experiments, and the various properties of the materials were tested and evaluated. The experimental results show that PSMAN has good high temperature resistance, spherical structure, and median particle size of 15.099 μm, and the water absorption rate of room temperature at 24 h reaches 37.8 g/g, and pressure bearing capacity can reach 5 MPa. The addition of polymer to water-based drilling fluid can increase the viscosity of drilling fluid and improve the rheological properties of drilling fluid by a small amount. Under normal temperature and medium pressure, the polymer can form a dense film on the surface of the mud cake, thereby reducing the filtration of drilling fluid and effectively improving the stability of the wellbore.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Denghui Ren,Hao Jiang,Shencheng Fan,Liu Song,Yating Luo,Fang Lai,Ruinan Pei,Qingzhao Yang,Jing Li
This study developed UV-responsive microcapsules to enhance the self-healing properties of asphalt, addressing the limitations of low survival rates and single-release mechanisms in current encapsulated rejuvenators. The microcapsules, featuring a urea-formaldehyde shell embedded with polydopamine-coated black phosphorus nanosheets (BP/DA) and microalgae bio-oil as the core, can convert solar energy into thermal energy, promoting proactive self-healing in asphalt materials. BP/DA expands the microcapsules' light absorption range, enhancing their photothermal conversion efficiency. When incorporated into styrene-butadiene-styrene (SBS)-modified asphalt at a 1.5% dosage, the microcapsules (BP/DA/MC) improved the mechanical properties: ductility increased by 13.7%, softening point rose by 2%, and penetration decreased by 3.3%. The storage modulus (G′) at 46 and 64°C increased by 35.9% and 24.3%, respectively, compared to SBS asphalt. Additionally, the ductility self-healing rate of BP/DA/MC/SBS asphalt improved by 209.7%, with a healing index (HI) of 78.16%. The microcapsules also demonstrated excellent photothermal conversion, increasing the asphalt's temperature by 22.6% under identical lighting conditions. This research offers a new method for developing intelligent self-healing asphalt with multi-mechanism activation, providing theoretical support for future third-generation microcapsule-based asphalt with remote-controlled release and activation response.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Mingyu Zhang,Mohammed Kamal Hadi,Dongli Guo,Tao Yao,Fen Ran
In recent years, a series of high-performance ultrafiltration membranes have been developed, but maintaining high flux and high pollutant retention rate without sacrificing service life remains a long-standing challenge. In this study, a porous polyethersulfone ultrafiltration membrane enriched with ZIF-8 and TiO 2 additives is prepared based on a non-solvent induced phase separation method. During the phase transition process, the addition of organic nanocrystals ZIF-8 and inorganic nanocrystals TiO 2 delayed the phase transition rate, resulting in the transformation of the polyethersulfone modified membrane from a finger-like pore structure to a sponge-like pore structure. Compared to other structures, the sponge-like modified membrane has a uniform and narrow pore size distribution, fewer surface defects, stable retention performance, and can simultaneously improve membrane permeability and mechanical strength. Therefore, the polyethersulfone modified membrane with a sponge-like pore structure prepared in this research exhibits high flux for small molecules and good retention rate for large molecules. Long-term cycling stability tests of the modified membrane shows high retention rate (over 98%), high flux, long service life, and good cycling stability for solute molecules. The study indicates that the prepared polyethersulfone modified membrane has high potential for application in relevant environmental separation processes.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 33
·e55829
·
IF 2.7
Tianyu Liu,Dandan Chen,Feng Gao,Yuchen Song,Zhuo Zheng,Jian Kang,Ruizhang Xu,Xiaojun Zhang,Yue Zhang,Zhihui Xie,Ming Xiang
Polyethylene-supported nanofiltration (NF) membranes have been reported for several cases in recent years. However, few have disclosed a NF membrane which achieves a high salt/water separation efficiency. Here, a novel polyamide NF membrane was prepared by conducting interfacial polymerization on poly(vinyl alcohol)-decorated polyethylene separator. The polyethylene-supported NF membranes were systematically investigated with respect to chemical structures, microscopic morphology, surface properties, as well as desalination performance. In particular, a distinctive morphology transformation occurred on the polyamide layers through regulating poly(vinyl alcohol) loading amounts. Performance testings demonstrated the optimal membrane reaches a water permeance over 17.4 L·m −2 ·h −1 ·bar −1 and Na 2 SO 4 rejection above 98.7%, as well as favorable performance stability. This work may provide some consideration for fabricating NF membranes with new support layers and good desalination performance.
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高影响因子
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