JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 6
·48355
·
IF 2.188
Yu Xia,Xiaojun Dai,Jing-Gang Gai
Aiming at preparing high-performance polyamide (PA) reverse osmosis (RO) membrane in a facile and high effective way, the codeposition strategy of dopamine and zwitterionic polymer was first applied to modify PA RO membrane. The noncovalent bonds between dopamine and Poly [2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide (PSPE) act to fix PSPE onto the membrane surface and simultaneously destroy the interaction force between dopamine aggregations so that the modified layer could equably form on the PA layer. PSPE significantly improved the hydrophilicity [the water contact angle (WCA) of S-D-3 is 25.3°] of the modified membrane. And, the smoother surface was noticed on the modified membrane. All of these endow the PSPE/dopamine modified membrane superb water flux (the maximum water flux is 51.86 L m −1 h −1 at 1.6 MPa and 25 °C) and impressive antifouling and anti-adhesion properties to bovine serum albumin (BSA) (protein), sodium dodecyl sulfate (anionic surfactant), and dodecyl trimethyl ammonium bromide (cationic surfactant) with salt retention was well maintained. Notably, in the BSA fouling test, nearly 100% of the flux recovery ratio was achieved. This method is promising to be employed in industrial scale-up production. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48355.
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 26
·
IF 1.86
Xiaosheng Du,Haibo Wang,Yan Wu,Zongliang Du,Xu Cheng
A hyperbranched polyol (HBP) was synthesized with poly(ethylene glycol) (PEG) as the core molecule and 2,2-bis(hydroxymethyl) propionic acid as the chain extender. Then, a series of hyperbranched polyurethane phase-change materials (HP-PCMs) with different crosslinking densities was synthesized with isophorone diisocyanate and HBP as a molecular skeleton and PEG 6000 as a phase-change ingredient. 1 H-NMR, gel permeation chromatography, and Fourier transform infrared spectroscopy confirmed the successful synthesis of the HBP and HP-PCMs. The polarization optical microscopy and wide-angle X-ray diffraction results show that the HP-PCM exhibited good crystallization properties, but the crystallinity was lower than that of PEG 6000. The analysis results from differential scanning calorimetry indicated that the HP-PCMs were typical solid–solid phase-change materials with suitable phase-transition temperatures. In addition, HP-PCM-3, with an appropriate degree of hyperbranched structure, possessed the highest thermal transition enthalpy of 123.5 J/g. Moreover, thermal cycling testing and thermogravimetric analysis showed that the HP-PCMs exhibited good thermal reliability and stability. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45014.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 46
·
IF 1.768
Fubin Luo,Kun Wu,Yinwen Li,Jian Zheng,Huilong Guo,Mangeng Lu
With a shell of poly (methyl methacrylate-co-hydroxyl ethyl acrylate) (PMMA-HA), microencapsulated ammonium polyphosphate (MHAPP) is prepared by in situ polymerization. The core-shell structure of the reactive flame retardant (FR) is characterized by Fourier transform infrared (FTIR) and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS). The results of water leaching rate and water contact angle measurements show that ammonium polyphosphate (APP) is well coated by a hydrophobic shell. Due to the presence of active groups (–OH) and hydrophobic groups (–CH 3 ) in shell, MHAPP exhibits better compatibility, flame retardancy, and water resistance compared with neat ammonium polyphosphate (APP) in rigid polyurethane foam (PU). Compression strength of PU/MHAPP with suitable loading is higher than that of PU/APP and PU, the reason is that the active groups in shell can improve the compatibility of MHAPP in PU composite. From thermal stability and residue analysis, it can be seen that the presence of reactive flame retardant shows positive effect on thermal stability of PU composite at high temperature, results also indicate that MHAPP can promote the carbonization formation efficiency of PU composite during combustion process compared with APP. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42800.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 30
·47811
·
IF 2.188
Biao Yang,Wen-Qiang Hua,Lei Li,Zi-Han Zhou,Ling Xu,Feng-Gang Bian,Xu Ji,Gan-Ji Zhong,Zhong-Ming Li
Regenerated cellulose/polyacrylamide (RC/PAAm) double network (DN) hydrogels are composed of cellulose crosslinked by epichlorohydrin (ECH) and chemical-crosslinked PAAm. The prepared RC/PAAm DN hydrogels present enhanced strength, good shape recovery property, excellent energy dissipation properties, decreased equilibrium water content, and low equilibrium swelling ratio (SR). The compressive strength and modulus of RC/PAAm hydrogel are about 4.3 and 11.5 times compared to that of RC hydrogel, respectively. Intriguingly, the chemical crosslinking between ECH and cellulose chains could increase the distance between cellulose chains. Consequently, the increasing molar ratio of ECH to glucose leads to larger SRs and decreased mechanical strength of the hydrogels. Additionally, higher PAAm contents lead to more densely crosslinked networks, and thus decreasing the SRs and improving the mechanical strength of the hydrogels. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47811.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 31
·50774
·
IF 3.125
Jia-Le Li,Quan-Ping Zhang,Xue Liu,Rui-Chao Chen,Wei-Di Xu,Nan Sun,Yin-Tao Li,Wen-Bin Yang,Dui-Gong Xu,Yuan-Lin Zhou
Flexible materials with excellent radiation shielding and flexibility are essential to the personal protective equipments (PPEs) for protecting workers from nuclear radiations. However, it is an enormous challenge to obtain the desired materials since high loading filler in polymer nanocomposites usually promotes radiation shielding while restrains its flexibility. Here, a facile “thiol-ene click” means is applied to chemically bond high loading boron nitride (BN) nanoparticles with silicone rubber (SR) in SR/BN nanocomposites for thermal neutron shielding. Uniform dispersion of BN nanoparticles and good compatibility of interfaces in the nanocomposites with high loading filler lead to increased flexibility instead of decrease. In particular, the nanocomposite with 40 wt% BN displays 911% of elongation at break that is about 50% enhancement to that of neat SR. Furthermore, higher loading BN in the nanocomposites means better thermal neutron shielding. Namely, enhanced thermal neutron shielding and flexibility is achieved at SR/BN nanocomposite with 40 wt% BN. The present work provides a facile strategy towards superior integrated performance of flexible materials for radiation shielding, such as wearable devices.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 38
·50971
·
IF 3.125
Yanqing Zhao,Yingli Su,Wangcai Zou,Gang Chen,Yiqing Deng,Jun Cheng,Haisheng Ren,Qiang Zhao
In order to prepare waterborne polyurethane with excellent water resistance and thermodynamic properties, a series of side chain fluorinated waterborne polyurethane-urea (FWPU-UA) was synthesized with polytetramethylene ether glycol, N -(2-methyl-1,3-propanediol-2′-)-perfluoro-1-butanesulfonyl amine (NPBA), isophorone diisocyanate, and isophoronediamine. With the increase of NPBA content, the weight loss temperature, glass transition temperature, and tensile strength of FWPU-UA were all improved. Gaussian fitting analysis of infrared data and density functional theory simulation proved that the introduction of fluorine side chains increased the interaction of hydrogen bonding in the FWPU-UA. X-ray photoelectron spectroscopy analysis indicated that the aggregation of fluorine atoms on the surface of film were caused by the migration and enrichment of fluorine side chains. Furthermore, the water resistance of polyurethane-urea film could be significantly improved by adding a small amount of NPBA, and the seven-day water absorption rate of polyurethane-urea film was reduced from 30.13% to 12.55%.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 13
·48497
·
IF 2.188
Yi Wang,Anqian Yuan,Yuanyang Zhao,Qinfeng Liu,Jingxin Lei
The utilization of renewable energy through phase change materials (PCMs) is particularly attractive for the realization of sustainable society. Herein, a flexible but reliable solid–solid PCM was successfully synthesized by the integration of quadruple H-bonding crosslinks with polyethylene glycol (PEG)-based polyurethanes. The strong quadruple H-bonding from the dimerization of 2-ureido-4 [1H]-pyrimidinone (UPy) units could act as dynamic cross-links to maintain shape stability. PEG chains in flexible polymer network serve as phase change ingredients, affording thermal energy storage capacity. The physical crosslink density and phase change enthalpy can be adjusted. In contrast to chemical crosslinks, the physical crosslinks of UPy provide reprocessability of the prepared PCMs and show little hindrance on the crystallization of PEG chains. The chemical structure, phase transformation, crystallization, and thermal properties of prepared PCMs were characterized by fourier transform infrared spectroscopy, differential scanning calorimetry (DSC), X-ray diffraction, polarizing microscope, and thermogravimetric analysis. DSC analysis shows that the prepared PCM can store 101.9 J g −1 when PCMs undergo phase change process. Moreover, the accelerated thermal cycling test and leakage test are also conducted to illustrate the thermal reliability and shape-stable properties. These PCMs that possess high phase change enthalpy and outstanding reprocessability are alternative for solar energy collection and waste heat recovery. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48497.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 19
·52132
·
IF 3.057
Jinzhao Li,Mengdi Chen,Yuechuan Wang
Demand for electronic materials with improved dielectric properties are increasing. One of the ways to reduce the dielectric constant is to incorporate fluorine atoms. In this article, a novel fluorinated epoxy resin (diglycidol ether of 2,4-bis (1,1,1,3,3,3-hexafluoroisopropyl) fluorobenzene (FB-EP)) with 45.7 wt% fluorine content was synthesized from fluorobenzene, epichlorohydrin and hexafluoroacetone. The structures of desired monomers were characterized by NMR and FTIR. The epoxy resin FB-EP was cured by copolymerization with hexahydrophthalic anhydride (HHPA) and by homopolymerization catalyzed with boron trifluoride ethylamine (BF 3 MEA), respectively. The curing reaction kinetics of the fluorinated epoxy and the properties of the cured materials were studied in comparison with those of common diglycidol ether epoxy resin (BADGE). The results of curing activation energy indicate that FB-EP is reactive as the BADGE, and the four-trifluoromethyl groups on FB-EP do not negatively affect the cationic polymerization reactivity of the epoxy groups. The cured FB-EP materials had lower moisture absorption, and especially lower dielectric constant ( D k , 2.23) and lower dielectric loss ( D f , 0.011) in the frequency range of 8.2–12.4 GHz. This article provides a base for further study of fluorinated epoxy resin as advanced electronic materials.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 18
·47436
·
IF 2.188
Xiuzhen Wei,Xufeng Xu,Jiawei Wu,Cuixia Li,Jinyuan Chen,Bosheng Lv,Baoku Zhu,Hai Xiang
Thin-film nanocomposite (TFN) nanofiltration (NF) membranes with superior properties were prepared using hydrophilic SiO 2 (HGPN-SiO 2 ) nanoparticles as the inorganic modifying monomer by an interfacial polymerization (IP) process. The effects of HGPN-SiO 2 on the morphology and surface properties of the prepared NF membranes were characterized by attenuated total reflectance–Fourier transform infrared spectroscopy, field emission scanning electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy, surface zeta potential, and static contact angle. The addition of HGPN-SiO 2 can effectively improve the permeate flux of the NF membranes. When the HGPN-SiO 2 concentration in the aqueous phase was 0.08 wt %, the permeate flux of the TFN-NF membrane was twice that of the pure NF membrane. Furthermore, the acid resistance of the TFN-NF membrane was clearly improved with the addition of HGPN-SiO 2 . Under neutral conditions, the TFN-NF membrane showed superior flux and salt rejection stability in a long-running operation. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47436.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 39
·e52937
·
IF 3.057
Hao He,Qiang Liu,Bing-Bing Gao,Shui-Dong Zhang,Hong-Bing Chen
In order to overcome the hydrophilic problem of aerogels based on soluble polymer, the transition of aerogel composites from hydrophilic to hydrophobic was achieved by grafting 1H, 1H, 2H, 2H-Perfluorodecyltrimethoxysilane (FAS). Simply immersing in FAS ethanol solution and then ambient drying, this method is universal and efficient, we successfully achieved the soluble polymer aerogels hydrophobic transition. Taking polyvinyl alcohol (PVOH)/SiO 2 as an example, the changes of structure and properties of aerogels before and after modification were characterized in detail. It was proved that FAS was successfully grafted and ethanol evaporation had little effect on the microstructure of aerogel. The resulting aerogels possess very good hydrophobicity, with water contact angle of up to 147.5° (3 wt.% FAS). The aerogel exhibits good stability in maintaining hydrophobicity in a harsh environment, such as in extreme pH and temperature. We introduced a universal method for hydrophobic modification, which is of great significance for the practical application of aerogels.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 45
·e53111
·
IF 3.057
Wei Lu,Huilin Zhang,Guansheng Qi,Xiangming Hu,Lulu Sun,Hao Su,Qian Zhang
In this paper, a new kind of environmental friendly double-network gel material was prepared. The first network structure was formed by the graft copolymerization of sodium lignosulfonate (LS) and acrylic acid (AA), and the second network structure was formed by the chelation reaction of sodium alginate (SA) and carbide slag clarified solution (Ca 2+ ). Through an orthogonal experiment, the effects of raw material addition on the compressive strength and apparent viscosity of the gel were analyzed. According to the analysis results, the optimal experimental ratio was obtained, i.e., 2 wt% of LS, 0.25 wt% of SA, 15 wt% of AA, 0.1 wt% of MBA and 0.3 wt% of APS. Furthermore, the structure of the gel are characterized by FTIR, XRD, SEM, XPS, and TG-DTG, and the results prove that the gel successfully polymerized and a stable three-dimensional network structure is formed. The results of water absorption experiment disclose that the gel is sensitive to ions and pH, and the water absorption rate reaches 121.25 times. In addition, the results of the air leakage experiment and fire extinguishing experiment show that the gel can effectively cover the surface of crushed coal and densely fill the gaps, demonstrating a good plugging capability and fire extinguishing capability.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 134
·期 8
·
IF 1.866
Defa Hou,Hanbing Ma,Xiuyun Li,Jie He,Huiwei Liao
A novel easily curing system of 2,2- bis (4-cyanatophenyl) propane(BACY) was prepared by employing 4,4′-(Hexafluoroisopropylidene) Diphenol (BPAF) as modifier. The curing efficiency of BPAF was evaluated by means of differential scanning calorimetry (DSC) and Fourier translation infrared spectroscopy analysis (FTIR). It was found that the exothermic peak temperature ( T p ) was 168 °C when the content of BPAF/BACY was 15/85 by weight, while the temperature of BACY was 215 °C under the same conditions when trace of cobalt(III) acetylacetonate(CoAt(III)) was added. Besides, BPAF/BACY system owned outstanding properties including excellent curing characteristics, high shear strength, remarkable dielectric properties and high thermal stability in contrast to BACY, 4,4′-(1-methylethylidene) bisphenol(BPA)/BACY, and nonylphenol(NoP)/BACY systems. Moreover, the properties of cured BPAF/BACY modified by different proportions of BPAF were studied in detail. It was shown that moderate BPAF was conducive to most properties of polycyanurate, and the optimal proportion of BPAF/BACY was 15/85 by weight. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44518.
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高影响因子
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