JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 3
·48301
·
IF 2.188
Xin Li,Zhuang Liu,LunYu Zhu,ShanShan Miao,Zheng Fang,LiHuan Zhao,Kai Guo
Welan gum has disadvantages such as poor solubility, low viscosity, and poor crosslinking property, when it is applied in petroleum industry, comparing to guar gum. Two methods for the carboxylic modification of welan gum were developed, carboxyethyl modification and citric acid modification, to improve the solubility in water, viscosity, and crosslinking ability of welan gum in the borax crosslinking system. The solubility time of carboxyethyl modified and citric acid modified welan gum were shortened to 30 and 90 min, respectively. The highest viscosity of citric acid modified product was 49.4 mPa s, the viscosity after crosslinking was raised at least 1.2 times to the highest four times than that before crosslinking. The results indicated three factors affecting the properties of modified products: (1) how many function groups in the modifying agent; (2) the way to connect the function group; and (3) the whole structure of the modifying agent. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48301.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 20
·50424
·
IF 2.52
Junfeng Qian,Tingting Wu,Jianqun Shi,Hao Chang,Donghui Liu,Yichang Pan
Membrane-based technology is an attractive alternative in terms of CO 2 separation. Pebax-based membranes are regarded as potential candidates for CO 2 separation due to the favorable interaction between its poly (ethylene oxide) chains with CO 2 molecules and inorganic fillers. However, the separation performance for CO 2 /CH 4 mixture is still suffered from the moderate gas permeability and selectivity. To overcome this problem, in this work, amino-functionalized zeolite imidazolate framework (ZIF-7-NH 2 ) nanocrystals were used as fillers to blend with Pebax 1657 for fabricating mixed-matrix membranes (MMMs). XRD, Brunauer–Emmett–Teller (BET), scanning electron microscope, and 1 H nuclear magnetic resonance characterization indicated that ZIF-7-NH 2 with the highest crystallinity was synthesized. Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry (DSC), and Young's modulus showed that it has good interfacial interaction. Gas separation test results showed that both the CO 2 permeability and CO 2 /CH 4 selectivity of the 31 wt% ZIF-7-NH 2 /Pebax MMMs increased by 80 and 170%, respectively. The improved performance is attributed to the addition of ZIF-7-NH 2 nanocrystals and the favorable interfacial interactions between the polymer and ZIF-7-NH 2 nanocrystals. Furthermore, the polyvinylidene fluoride supported hollow fiber composite membranes also exhibit the long-term stability for CO 2 /CH 4 separation.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 8
·45839
·
IF 1.86
Gang Wei,Kaijie Dong,Qinze Liu,Tingting Gao,Jinshui Yao
A silica-sphere–poly(catechol hexamethylenediamine) (PCHA–SiO 2 ) composite was prepared via the one-step facile polymerization of catechol and hexamethylenediamine; this method uses a silica sphere as a hard template. The chemical structures and morphologies of this composite were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, and transmission electron microscopy. The adsorption experiments indicated that the PCHA–SiO 2 composite served as a very attractive adsorbent for Pb(II)-, Cu(II)-, and Cd(II)-ion removal at lower concentrations and had very good selective adsorption abilities for Pb(II) and Cu(II) ions in a solution contaminated with these three ions at higher concentrations. These interesting results may have been due to the reversible H + adsorption–desorption properties of the characteristic phenol amine structure of the PCHA–SiO 2 composite. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45839.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 47
·e53180
·
IF 3.057
Yue Wang,Zhipeng Fang,Adeel Ahmed,Qiubo Wang,Hailin Cong,Youqing Shen,Bing Yu
In order to better realize the separation of chiral enantiomers and prevent chiral compounds with toxic side effects from causing harm to human beings, porous microspheres were modified to improve their chromatographic separation performance. In this paper, in order to verify the chromatographic performance of porous polymer microspheres, the precise and controllable synthesis of poly (styrene-divinylbenzene) (PS-DVB) microspheres was realized based on the two-step swelling method. Then, the porous PS-DVB microspheres were sulfonated with concentrated sulfuric acid. The sulfonated microspheres were grafted with diazo resin (DR), and then the 3,5-dichlorobenzene isocyanate modified β -cyclodextrin ( β -CD-DCIPI) was bonded to the sulfonated PS-DVB microspheres by the DR. Finally, the bond inversion occurred after UV irradiation. We have successfully solved the toxic effect of traditional coupling agents by using the unique photo-crosslinking reaction of DR. This novel and environmentally friendly chromatographic packing can be used to separate chiral compounds. The results showed that all of the eight compounds (chlorpheniramine; ibuprofen; benzoin; 2-phenylcyclohexanone; trans-stilbene oxide; Cobalt [III] acetylacetonate; Hesperetin; DL-Mandelic acid) can be separated. It is worth noting that the modified microspheres can achieve good separation of chiral compounds with the concentration of 1 mg/ml in 3 min.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 11
·48473
·
IF 2.188
Desheng Qi,Jiayu Wang,Yugang Qi,Jing Wen,Shu Wei,Dajun Liu,Shuangjiang Yu
In this work, we present a new type of glutathione (GSH)-responsive polyurethane-based core‑shell nanogels (RS-CS-PUNGs) with hydrophilic methoxypolyethylene glycols (mPEG) shell, which was prepared by a one-pot synthetic method. The obtained RS-CS-PUNGs not only show a good size distribution with the hydrodynamic radii around of 20 nm, but also exhibit good stability in the organic solvent. The results demonstrate that GSH (10 mM) trigger the nanogel swelling and accelerate the loaded drug release in PBS (pH = 7.4). Although the RS-CS-PUNGs loaded with DOX show a slower cellular uptake behavior than the free doxorubicin (DOX), which is likely caused by the controlled drug release property of the nanocarrier, the enhanced cellular uptake fluorescence intensity of RS-CS-PUNGs loaded with DOX is still observed compared to the control group. Both MTT and CCK-8 assay indicate that although an obvious lower initial cytotoxicity is observed compared to free DOX at 24 h postincubation, the cytotoxicity of the RS-CS-PUNGs loaded with DOX is obvious enhanced after treated 72 h, which stayed at the similar level with free DOX. Attributing to the easy preparation progress and GSH-responsive property, RS-CS-PUNGs maybe hold the potential for further application in the field of drug delivery. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48473.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 13
·50127
·
IF 2.52
Yuanfu Tian,Yehua Yang,Jinqiang Tan,Dachuan Ding,Zhiyuan Song,Qian Tao,Xuan Zheng,Tao Hu,Xinghou Gong,Chonggang Wu
To enhance the compatibility of poly(ethylene terephthalate) (PET)/liquid crystalline polymer (LCP) composite, thereby mechanically strengthening the PET matrix, an optimally compatibilized composite of chain-extended and -carboxylated PET ionomer and poly(4-hydroxybenzoic acid– ran –6-hydroxy-2-naphthoic acid) (HBA–HNA) was successfully prepared. Upon PET carboxylated chain extension with pyromellitic dianhydride and subsequent ionization with Zn(OH) 2 , the compatibility of the composite was distinctly improved, as verified by the refined dispersed-phase morphology, increased number of refined HBA–HNA fibrils, reduced crystallinity, and improved complex viscosity. Compared with PET, the optimally compatibilized composite displayed a 70.1 and 148.7% increase in Young's modulus and tensile strength, respectively. Tentatively mechanistically, the interfacial interaction may change from weak hydrogen bonding to strong ion–dipole interactions due to the introduction of ionic groups, which remarkably boosts the interfacial compatibility, thereby achieving synergistic effects of the ionization and HBA–HNA inclusion to maximally strengthen PET. It seems that the synergistic ionization/LCP inclusion by a one-pot method establishes a promising preparation approach to commercial PET engineering resins.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 11
·50043
·
IF 2.52
Haitao Meng,Tong Xu,Mingyuan Gao,Jie Bai,Chunping Li
Oil–water separation is an urgent issue due to the frequently occurred oil leakages and increasing discharge of oily wastewater. The pollutional and wastewater can not only damage the environment, but endanger human health. Owing to the small particle size of the oil contamination, it is still a challenge for the separation of oil–water emulsion. In this study, we developed a facile strategy to prepare a hydrophilic polyvinylpyrrolidone/polyacrylonitrile (PVP/PAN) nanofibrous membrane for oil–water mixture and emulsion separation. The lowest water contact angle on the membrane surface can achieve 16.7°, thus the membranes can effectively resist the oil contamination on them. Moreover, the membrane can efficiently separate oil–water mixtures and emulsion by gravity. In addition, it can separate oil–water mixtures in harsh conditions (pH = 1 and 14). Membranes prepared in this work would hold a great potential in the practical use of water treatment and environmental industry.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 34
·50853
·
IF 3.125
Junzhi Ma,Dong Wang,Shaohai Fu
To improve flame-retardant properties of unsaturated polyester resin (UPR), two phosphorus-containing vinyl monomers with different chemical structures were synthesized to replace styrene molecules and then copolymerized with UPR oligomers to prepare flame-retardant phosphatized UPRs. Curing behavior of phosphatized UPRs was investigated by DSC non-isothermal curing curves, deducing the best curing conditions. Cone calorimeter results demonstrated the obvious reduction of heat release rate and smoke production rate by comparing phosphatized UPRs with flammable UPR. TG-IR-MS coupling technique was utilized to reveal thermal degradation and pyrolytic volatiles including aromatic compounds, hydrocarbons, CO, PO 4 ˙, and so forth, providing more information of smoke toxicity and the gas phase flame- retardant mechanism of phosphatized UPRs. Moreover, the yield, compactness and graphitic degree of char residues of phosphatized UPRs were increased, strengthening the barrier effect to inhibit the permeation of combustion heat and the effusion of pyrolytic volatiles in the condensed phase.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 18
·52084
·
IF 3.125
Tao Chen,Cheng Cai,Yan-ting Zhang,Zeng Zhao,Shu-yan Zhang,Chong-gang Wu,Xing-hou Gong,Jiang Hong,Tao Hu
The paradox of obtaining dielectric elastomers (DEs) with both low modulus and high-dielectric properties has long been puzzling researchers in this field. To solve this problem, a preliminary attempt is made here by solution compounding polyphenol nanoparticles modified multiwalled carbon nanotube (PNs@MWCNT) with polydimethylsiloxane (PDMS) to obtain PDMS based DEs with excellent electromechanical properties. The PNs layer can improve the interfacial interaction between MWCNT and PDMS probably through interfacial hydrogen bonding, thus improving the dispersion of PNs@MWCNT in PDMS. Compared with pure MWCNT filled PDMS nanocomposites, despite the hardening effect brought by the filler network, a softening effect (i.e., decreased cross-linking) by the finer filler-dispersion enhances in PNs@MWCNT/PDMS, resulting in lower moduli. Meanwhile, the as-prepared PNs@MWCNT/PDMS composites exhibit high permittivity, low-dielectric loss and high-breakdown strength. Finally, the PNs@MWCNT/PDMS nanocomposites show excellent electromechanical properties with a largest actuated strain of 7.4% at a breakdown strength of 13.1 kV/mm, which is 2.2 times that (3.3%@13.3 kV/mm) of MWCNT/PDMS and 3.9 times that (1.9%@18.8 kV/mm) of neat PDMS.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 20
·52144
·
IF 3.057
Jingyu Ren,Xiangbin Dong,Yanjie Duan,Lin Lin,Xiaowei Xu,Jichao Shi,Runping Jia,Dandan Wu,Xinyao He
A series of self-healing waterborne polyurethane (WPU) films utilizing reversible covalent bond acylhydrazones diol (PA) as chain extender were successfully synthesized. The self-healing performance of WPU with different content of chain extender PA has been systemically characterized via cut-and-healing tests and mechanical quantitative evaluation. The film can repair cracks through acylhydrazone exchange reactions within 12 h. When the content of PA is 1.5 wt%, the WPU has the highest self-healing efficiency of 90.5%. Meanwhile, the effect of PA mass fraction on the particle size distribution, mechanical ability, crystallization, water resistance properties, and thermal stability of WPU were evaluated. With the introduction of acylhydrazone bonds, the hydrophobicity of the WPU material was enhanced, while achieving self-healing performance, which solves the problem of aging and replacement of materials. These results indicated that the self-healing WPU exhibited great application prospect as a versatile material.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 47
·e53178
·
IF 3.057
Fenghua Li,Man Liu,Dexiang Yan,Zonggong Yin,Jiahong Xiao,Bin Sun,Yuhong Shen,Tingting Gao,Qinze Liu,Guowei Zhou
With the current situation of high-energy consumption and high pollution in the textile industry, developing an eco-friendly and universal dyeing technology is urgently required. Towards this goal, in this study, the dyeing technology with room temperature, salt-free, zero release, and rapid cycle dyeing for 20 min was realized using a polymer of catechol and polyethyleneimine as a dye. The dyed fabrics exhibited washing, rubbing, and perspiration fastness characteristics for practical needs, mainly attributing to the hydrogen bonding and π–π interaction between the dye molecules and the fabrics. Benefiting from the unique dyeing technology, the dyed fabrics show excellent leveling properties and adjustable chromaticity. Importantly, the mussel-inspired coating strategies are universally applicable, so the dyeing technology can be applied to various fabrics. Consequently, the environmentally friendly dyeing process based on low-cost catecholamine polymers as a dye will have a broad application prospect in the printing and dyeing industry. Moreover, the antibacterial tests showed that dyed cotton cloth, mulberry silk, and polyester fabrics all have favorable antibacterial properties, especially dyed mulberry silk fabrics have a greater than 90% bacterial reduction rate for both Escherichia coli and Staphylococcus aureus .
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 12
·48485
·
IF 2.188
Dan Meng,Jiazhuo Xie,Geoffrey I. N. Waterhouse,Kun Zhang,Qinghua Zhao,Shuo Wang,Shuo Qiu,Kaijun Chen,Jinxi Li,Chizhen Ma,Yue Pan,Jing Xu
The accumulation of nonbiodegradable petrochemical-based polymers in the environment motivates the development and use of low-cost, eco-friendly, and biodegradable polymers. A series of biodegradable poly(butylene adipate-co-terephthalate) composites reinforced by sustainably sourced nanochitin were successfully prepared using melt blending and compression molding methods. Structural, thermal, and mechanical characterizations of poly(butylene adipate-co-terephthalate) (PBAT)/nanochitin composites were performed. SEM revealed that the nanochitin was uniformly dispersed throughout the PBAT matrix at low contents (<2 wt %), while DSC analyses revealed a corresponding increase in the crystallinity (32.6% enhancement) of the PBAT matrix. The tensile strength and elongation at break of the PBAT/nanochitin composite containing 0.5 wt % nanochitin were higher by 82.5 and 64.2%, respectively, compared with pristine PBAT. The Chitin-0.5 composite also showed improved thermal stability compared with PBAT (the char yield improved by 8%) due to the uniform dispersion of nanochitin in the PBAT matrix. The enhanced performance of the PBAT/nanochitin composites, prepared without an added compatibilizer, informs the development of improved biodegradable PBAT-based polymers. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48485.
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高影响因子
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