JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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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
·
2024
·
IF 2.7
Yuejiao Wu,Jian Yang,Ke Shen,Liyan Liu,Jing Cao,Zhaomei Wang
Curcumin (Cur) is a bioactive nutraceutical with great potential in biological, nutritional, and medical applications. However, these applications are limited by various factors such as insufficient ingestion, low aqueous solubility, and relatively high toxicity to normal cells. To tackle these obstacles, we synthesized a novel Cur-modified-rhamnogalacturonan (RG-C) nano-micelle carrier to target-deliver Cur to hepatocellular carcinoma HepG2 cells via specific recognition of RG-I by the overexpressed surface galactin-3 receptor. Fourier transfer infrared, UV–vis, and 1 H NMR analyses confirmed the conjugation between RG and Cur RG-C loaded with Cur (RG-CC) was formed via self-assembly in an aqueous solution with a drug loading efficiency of 12.2%. RG-CC micelle was ellipsoidal or cubic with a size ranging between 100 and 200 nm by scanning electron microscopy observation. Cur release from RG-CC exhibited a controlled and pH-dependent manner with 50% at pH 5.0 in contrast to 5% at pH 7.4 after 24 h exposure. RG-CC possessed more potent anti-proliferative activity against HepG2 cells than normal embryonic kidney 293T cells. Compared to free Cur, both the anti-proliferative effect and uptake of RG-CC were significantly higher in HepG2 cells as revealed from laser confocal microscopy and flow cytometry analyses. RG-CC was a promising anticancer candidate and deserves further preclinical and clinical investigations.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Yun Hong,Chunjie Li,Feng Zhang,Xiaoye Ma,Dingxiao Jiang,Rizhe Jin,Chuanqing Kang
The incorporation of fillers into waterborne polyurethane (WPU) can endow the composites with improved physicochemical and physiological properties for biomedical applications. Silk fibroin possesses excellent mechanical properties and biocompatibility owing to its unique hierarchical structure comprising β-sheet crystallites and amorphous matrix. To mimic its structure, a crystalline tetrapeptide Gly-Ala-Gly-Ala (GAGA) derived from the repetitive segments of the primary sequence of fibroins was grafted onto the WPU backbone. The tetrapeptides aggregated via additional hydrogen bonds to form crystalline domains, which served as physical crosslinking points to significantly improve the mechanical properties of WPU. Compared with the pristine WPU, the modification enhanced the maximum tensile strength (from 13.1 to 25.4 MPa) and hydrophilicity (the water contact angle from 80.6° to 38.8°). In addition, the modified WPU with the optimal proportion of the tetrapeptide remained structurally stable under physiological environments and showed improved biocompatibility including good cell and protein adhesion, noncytotoxicity, and nonhemolysis. The excellent performance confirms the effectiveness of peptides in WPU modification and sheds light on the potential of modified WPU in biomedical applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 16
·e55254
·
IF 2.7
Saifei Fang,Xin Pu,Ali Usman,Jiawen Hu,Xin Han,Lei Ye,Yunlong Qin,Pengpeng Liu,Bo Luan,Jichang Liu
Asphaltenes and waxes are the primary factors affecting the cold flow properties of crude oil. In this paper, based on the binary polymer of acrylate-maleic anhydride (PM 22 -MA), different third polar groups of acrylamide, N -(hydroxymethyl) acrylamide, N -phenylacrylamide (NPA), and styrene (SM) were introduced to synthesize a series of ternary pour point depressants (PPDs) to explore the effect of asphaltene on the cold flow properties of Xijiang (XJ) crude oil. Thereinto, PM 22 -MA-NPA containing amide group and benzene ring exhibited the best depressive effect, which decreased pour point by 14°C at 1500 ppm. The mechanism of interaction of the polar groups in PPDs with asphaltene was studied. The polar groups could form stronger hydrogen bonds with asphaltene, delaying the asphaltene macromolecule bonding, allowing the synergistic effect of PPDs and asphaltene to be better utilized to improve the cold flow properties of crude oil. Furthermore, the dipole moment magnitude and electron cloud density were calculated with Gaussian. It was found that the polar group with a dipole moment magnitude of 3.2244 debye and an electron cloud density ranging from −1.6364 to 1.9944 eV was the most suitable third polar monomer for the PPDs of XJ crude oil.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2024
·
IF 2.7
Yihui Xu,Yudong Liu,Ling Liu,Jun Liu
The blending of different elastomers can greatly broaden the application range of rubber materials. However, due to the poor compatibility between polar elastomers and non-polar elastomers, severe phase separation occurs during the blending process, which severely degrades their processing performance and mechanical properties. In this paper, we prepared SBR-P/XNBR blends by emulsion blending polar modified styrene-butadiene rubber (SBR-P) latex with carboxylated nitrile rubber (XNBR) latex. The effects of the blending ratios on the vulcanization behavior, mechanical strength, dynamic mechanical properties, and oil resistance of the rubber compounds were studied. Experimental results showed that the mechanical strength and oil resistance of the modified SBR-P/XNBR blends are significantly higher than the unmodified SBR and XNBR blends. The dynamic mechanical analysis curve results of the rubber compounds showed that SBR-P has good compatibility with XNBR. With the increasing addition of XNBR, the oil resistance of the rubber compounds improves, and the solvent adsorption is reduced by over 60%.This study proposes a solution for utilizing non-polar rubbers, which are typically not oil-resistant, in oily environments. The proposed solution enables the preparation of composites with excellent mechanical properties in such environments.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zhisong Li,Linbo Wu
Poly(ethylene 2,5-furandicarboxylate) (PEF) is an important biobased polyester with better thermal, mechanical, and gas barrier properties than poly(ethylene terephthalate). In PEF synthesis, diethylene glycol furandicarboxylate (DF) is inevitably formed via etherification side reaction. Taking advantage of the side reaction, poly(ethylene-co-diethylene furandicarboxylate) (PEDF) poly(ether-ester)s were synthesized only from 2,5-furandicarboxylic acid (FDCA) and ethylene glycol (EG), using a cheap binary propanedisulfonic acid/dibutyltin oxide (PSA/DBTO) catalyst. The polymers were characterized by 1 H NMR, intrinsic viscosity, solubility, differential scanning calorimetry, thermogravimetric analysis, tensile, and gas barrier test. Due to strong acidity of PSA, not only major DF but also minor oligoethylene glycol furandicarboxylate ether-containing units were formed. Their total content can be adjusted up to 78 mol% by simply increasing the dosage of PSA from 0 to 0.4 wt%. The effect of ether-containing units on the solubility, thermal transition, mechanical, and oxygen barrier properties of the poly(ether-ester)s were examined and compared with the poly(ether-ester)s synthesized via copolycondensation.
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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
·
2024
·
IF 2.7
Huiying Li,Shuichang Chen,Hongjian Huang,Yan Fang,Yunxiang Weng,Qinhui Chen,Xinqing Liu,Haiqing Liu
In circumstances of severe traumatic bleeding, urgent bleeding control is vital to the wellness and life of the wounded person. Among many hemostatic measures, gauze is widely used because of cost-effectiveness, safety and efficiency. However, it may suck a large amount of blood before bleeding stops. Thus, advanced hemostatic gauzes less blood loss and quick hemostatic rate and is greatly demanded. Herein, a novel tissue adhesive gauze (TA-gauze) is developed by coating a thin layer of polyethyleneimine/poly(acrylic acid) (PEI/PAA) on the plain cotton gauze. This TA-gauze has a reduced hydrophilicity and gets a new trait of wet tissue adhesiveness from the PEI/PAA coating layer. The TA-gauze shows much improved hemostatic performance in the rat injury models, that is, its blood loss in the rat femoral artery model is just 13% that of the cotton gauze, due to it can retard the blood movement in the gauze and at the seam of gauze/tissue through a synergistic effect of tissue adhesion and hygroscopicity. It is biocompatible and on-demand detachable. The simple preparation procedure and high hemostatic efficiency of the TA-gauze may promise a bright future for an ideal hemostatic dressing for bleeding control.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yan Zhu,Minhan Chen,Yibo Wu,Ruofan Liu,Wei Ding,Hao Zhang,Yanhong Song,Yushun Jin,Jiwei Li
Poly(styrene- b -isobutylene- b -styrene) (SIBS) is a biomedical elastomer with excellent overall properties. However, the low surface energy and the surface hydrophobicity of SIBS have limited its application as a human implantable material. To improve its biocompatibility, in this work, hyaluronic acid (HA) was introduced onto the surface of SIBS. Firstly, glycidyl methacrylate (GMA) and HA were employed to prepare GMA-modified HA (GMHA) via grafting reaction. Due to the introduction of carbon–carbon double bonds on the side chain of HA, the GMHA could be used for free radical polymerization between SIBS. The effects of UV illumination time, GMHA concentration, and initiator concentration on the grafting ratio were investigated. FTIR, 1H NMR, and XPS confirmed the successful grafting of HA onto SIBS. The experimental results showed that the surface modification method not only ensured that the excellent properties of the SIBS would not be destroyed but also improved its surface properties successfully. Besides, the MTT assay indicated that the GMHA-modified SIBS was not bio-toxic, so it could meet the need to expand its use in the biomedical fields.
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高影响因子
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