JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 20
·48691
·
IF 2.188
Shuning Chen,Jie Ai,Jiawen Chen,Jianrong Lin,Qinhui Chen
People are always puzzled by “white pollution” in recent decade. Recycling of waste styrofoam as a coating is a good sustainable solution to resolve this problem. However, the poor compatibility between inorganic additives and polymer hinders the application of recycled polystyrene. In this article, anisotropic Janus particles were used to increase the compatibility of titanium dioxide/waste styrofoam coatings. SEM results show that Janus particles can be anchored at the interface between styrofoam and titanium dioxide, increasing the dispersion of titanium dioxide, and improving the compatibility of inorganic particles and organic polymer. The glass-transition temperature of styrofoam coating increases from 77 °C to 89 °C in titanium dioxide/styrofoam contained 1 wt % of Janus particles, which certified that Janus particles have compatibilization on titanium dioxide/styrofoam coating. Attributing to this compatibilization, the tensile strength of titanium dioxide/styrofoam with 1 wt % of Janus particles rises about 45% compared with titanium dioxide/styrofoam. The yield stress, storage modulus, and viscosity of titanium dioxide/styrofoam contained 1 wt % of Janus particles are the smallest and the closest to Newtonian fluid. Janus particles used in the recycled styrofoam coating is benefit to expand the application of waste styrofoam and the new anisotropic Janus compatibilizer. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 137 , 48691.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 4
·48316
·
IF 2.188
Ruijun Gao,Yan Yao,Ling Wang,Hao Wu
Graphene oxide (GO) was modified by in situ esterification reaction with isopentenol polyoxyethylene ether (IPEG) to obtain GO precursor (GO-IPEG) with some polymerization activity. GO-modified polycarboxylic (GO-PCE) was prepared by GO-IPEG and acrylic acid (AA) using the method of in situ polymerization. The molecular structure of GO-IPEG and GO-PCE was characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectra, and nuclear magnetic resonance (NMR). The dispersion properties and dispersion stability of GO-IPEG and GO-PCE in water solution were studied by ultraviolet–visible (UV–vis) absorption spectra, zeta potential, and atomic force microscope. The results of FTIR, Raman, 1 H-NMR, and 13 C-NMR indicate that IPEG was successfully grafted onto the surface of GO and then fabricated with AA by in situ free-radical polymerization. The results of UV–vis and zeta potential show that GO nanosheets have a better dispersion in GO-IPEG or GO-PCE system when the reaction time of GO and IPEG is 1 h, and the dispersion stability can reach up to 1 month. The better dispersion and application property are confirmed by atomic force microscopy image and cement fluidity, water reducing rate, and compression strength. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48316.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 134
·期 8
·
IF 1.866
Rui Bao,Shilin Yan,Ying Qin,Man Lu
This study investigates the effect of the thiol-ene click reaction on thermal conductivity and shear strength of the epoxy composites reinforced by various silane-functionalized hybrids of sulfhydryl-grafted multi-walled carbon nanotubes (SH-MWCNTs) and vinyl-grafted MWCNTs (CC-MWCNTs). The results of Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, thermal gravimetric analysis (TGA), and transmission electron microscopy (TEM) show that the sulfhydryl groups and vinyl groups are successfully grafted onto the surface of MWCNTs, after treatment of MWCNT with triethoxyvinylsilane and 3-mercaptopropyltrimethoxysilane, respectively. Scanning electron microscopy (SEM), HotDisk thermal constant analyzer (HotDisk), optical microscope, and differential scanning calorimetry (DSC) are used to characterize the resultant composites. It is demonstrated that the hybrid of 75 wt % SH-MWCNTs and 25 wt % CC-MWCNTs has better dispersion and stability in epoxy matrix, and shows a stronger synergistic effect in improving the thermal conductivity of epoxy composite via the thiol-ene click reaction with 2,2′-azobis(2-methylpropionitrile) as thermal initiator. Furthermore, the tensile shear strength results of MWCNT/epoxy composites and the optical microscopy photographs of shear failure section indicate that the composite with the hybrid MWCNTs has higher shear strength than that with raw MWCNTs. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44579.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 28
·
IF 1.768
Hang Xu,Haicun Yang,Liu Zhang,Qingting Ni,Fanghong Gong
The Core-shell hybrid particles with attapulgite (ATP) as the core and polymethylmethacrylate (PMMA) as the shell (ATP- g -PMMA) were prepared via reversible addition-fragmentation chain transfer (RAFT) polymerization method. The diameter of ATP- g -PMMA was increased to 50–60 nm, and the surface hygroscopicity was decreased observably after surface grafting. Then, ATP- g -PMMA hybrid particles were filled into the polycarbonate (PC) by melt mixing to afford nanocomposites, and the mechanical properties, microstructures, thermal stability, and rheological behavior of nanocomposites were investigated by varying ATP- g -PMMA concentration in the range 1, 3, 5, and 7 wt % in PC. Fourier Transform infrared spectroscopy (FTIR) suggested that there is no esterification reaction between particles and matrix. Slight changes in tensile strength, and noticeable decrease of elongation and impact strength were observed with the increase in ATP- g -PMMA particles loading. The morphology evaluated by field-emission scanning electron microscopy (FESEM) indicated that ATP- g -PMMA was dispersed with a diameter range of 80–100 nm, and phase separation was appeared with increasing ATP- g -PMMA loadings. Thermogravimetric analysis (TGA) results revealed the thermal stability of composites was strengthened. The disentanglement and interface slip induced by preferred orientation and directional arrangement of ATP- g -PMMA resulted in lower complex viscosity (η*) and higher loss factor (tan δ) compared with the pristine PC. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42262.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 23
·48781
·
IF 2.188
Bengang Li,Chao Wu,Chengyu Wang,Zhenyang Luo,Jianpeng Cao
Developing electrically conductive hydrogels with good electronic properties and excellent mechanical performance is significant to their potential applications. In this article, we present a strategy to fabricate tough, self-recoverable and electrically conductive hydrogels containing reduced graphene oxide (rGO). Poly(acrylic acid) grafted graphene oxide (GO-g-PAA) was synthesized and incorporated into chemically crosslinked polyacrylamide (PAM) networks to obtain GO-g-PAA/PAM hydrogels, which were further treated with ascorbic acid solution at ambient temperature to give rGO-g-PAA/PAM hydrogels. The interfacial interaction between GO/rGO and hydrogel matrix was improved by reversible hydrogen bonds between the grafted PAA chains and PAM matrix. Consequently, both GO-g-PAA/PAM and rGO-g-PAA/PAM hydrogels exhibited improved tensile properties, excellent energy dissipation, and rapid self-recovery. The in situ chemical reduction of GO-g-PAA in hydrogel matrix endowed rGO-g-PAA/PAM hydrogels with satisfactory electrical conductivity and obvious resistance change upon stretching. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48781.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 48
·51367
·
IF 3.125
Yujiao Gao,Dongning Liu,Yuanyuan Xie,Yiheng Song,Enwen Zhu,Zhuqun Shi,Quanling Yang,Chuanxi Xiong
In recent years, the wearable electronic skin (E-skin) has attracted more and more attention due to high sensitivity, good portability and flexibility. In this work, we used the 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibril (TOCN) as the substrate, and used the in-situ polymerization method to introduce polypyrrole (PPy) into the TOCN substrate. Then, the nylon gauze was used as microstructure template to prepare a TOCN/PPy E-skin with a surface microstructure. This E-skin possessed excellent sensing and mechanical properties. In the pressure range of 0–600 Pa, the sensitivity of E-skin was 3.13 kPa −1 . In addition, the E-skin exhibited ultrafast response/recovery time (≤10 ms), ultralow detection limit of 0.3 Pa, good stability (>9000 cycles) and mechanical strength of up to 117 MPa. Therefore, the TOCN/PPy E-skin has broad development prospects in the fields of artificial intelligence and health monitoring.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 4
·47005
·
IF 1.901
C. Jiang,W. Liu,Y. Sun,C. Liu,M. Yang,Z. Wang
Superhydrophobic and superoleophilic cotton fabric was successfully prepared with fluorinated silica sol via a facile sol–gel method. A fluorinated polymeric sol–gel precursor (PHFBMA-MTS) was synthesized via free-radical polymerization by using hexafluorobutyl methacrylate (HFBMA) in the presence of (3-mercaptopropyl)trimethoxysilane (MTS) as the chain transfer agent, which led to the formation of fluoropolymer with alkoxysilane end groups. Then the fluorinated silica sol was prepared by introducing PHFBMA-MTS as the co-precursor of tetraethylorthosilicate (TEOS) in the sol–gel process with ammonium hydroxide as the catalyst, which was then used to fabricate superhydrophobic and superoleophilic fabric coatings through a simple dip-coating method. The coated fabrics showed superhydrophobic property with a high water contact angle of 154.1° and superoleophilic property with an oil contact angle of 0°. Moreover, the coated fabrics still kept superhydrophobicity even after ultrasonic treatment, as well as for organic solutions, acidic solutions. Thus, the coated fabrics were successfully applied to separate oil–water mixture with separation efficiency up to 99.8%. More importantly, the separation efficiency had no significant change after 20 cycles of oil–water separation. These present a simple, low-cost, and durable approach to achieve industrialized application of coated fabrics in oil–water separation. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47005.
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 22
·52254
·
IF 3.057
Zhangcheng Gao,Lianfang Feng,Xueping Gu,Jintang Duan,Cailiang Zhang
Copolyureas have a variety of sequence structures because of the diversity of monomer types and quantities, which directly determine their properties. 4,4′-diphenylmethane diisocyanate (MDI), m-phenylenediamine (MPD), and polyoxypropylenediamine (D2000) are used as monomers to study the influence of mixing on the sequence structure of as-prepared copolyurea. D2000 as a macromolecular aliphatic diamine has an extremely high reactivity with MDI, which is two to three orders of magnitude higher than that of MPD with MDI. While the molecular chain of D2000 is much longer than that of MPD, resulting in that the reaction between D2000 and MDI is much easier to change from reaction control to diffusion control than that between MPD and MDI. It is verified that the enhanced mixing can dramatically reduce the hindered effect of diffusion, and promote the reaction of MDI and D2000 to change the sequence structure of as-synthesized copolyurea. Specifically, as the stirring speed increased from 100 to 800 rpm, the content of MPD-MDI-MPD segment decreased from 57 to 15 mol%, while that of MPD-MDI-D2000 and D2000-MDI-D2000 segments increased from 39 and 4 mol% to 64 and 21 mol%, respectively. As a result, the as-synthesized copolyureas become more ductile from the high tensile strength and hardness. More specifically, the Shore A hardness, tensile strength, and the broken elongation of the as-synthesized copolyureas were changed from 81, 56 MPa and 65% to 68, 40 MPa and 188%, respectively.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 44
·e53070
·
IF 3.057
Yuanyu Ge,Zhenming Qi,Desheng Sha,Xiaosai Hu,Shiwen Liu
Intumescent flame retardant (IFR) is the new generation of environmentally friendly flame retardant. The improved water solubility of IFR enhances its application in cellulose-based textiles. A water-soluble carbon–nitrogen–phosphorus (C–N–P) ternary IFR (PTETP) was synthesized using cyanuric chloride (TCT), ethylene glycol (EG), and O-phosphoethanolamine (O-PEA) as starting materials. The burning performance of untreated and PTETP treated cotton fabrics was evaluated using vertical flammability test (VFT), limiting oxygen index (LOI), and cone calorimetry. The results indicate that with the increase of PTETP content, the flame retardant performance of cotton fabrics is gradually enhanced. The cotton fabric treated with 10 wt% PTETP shows no afterflame combustion, has a char length of 98 mm, and a LOI of 30.8%. Compared with pristine cotton fabric, the peak heat release rate (PHRR) and total heat release (THR) of the treated cotton fabric were reduced by 52.6% and 28.2%, respectively. Thermogravimetric (TG) shows that PTETP effectively improves the thermal stability and reduces the thermal decomposition temperature of cotton fabric, and even can increases the residual carbon rate by 20%. In addition, the employment of PTETP shows no harm on the tensile strength of cotton fabrics. After washing 20 times, LOI of flame-retardant cotton fabric still remained almost 26%.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 3
·49689
·
IF 2.52
Beijie Zhong,Liming Shen,Xiaoyan Zhang,Chang Li,Ningzhong Bao
Reduced graphene oxide-silica (rGO/SiO 2 ) nanocomposite filler was prepared with a ball milling process and then modified using a coupling agent of NH 2 C 3 H 6 Si(OC 2 H 5 ) 3 (KH-550) to improve its dispersion in the fluoroethylene vinyl ether (FEVE) coating. The surface properties and morphologies of the modified rGO/SiO 2 (M-rGO/SiO 2 ) nanocomposite filler and M-rGO/SiO 2 -reinforced FEVE coating were characterized by using Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Electrochemical impedance spectroscopy (EIS) and Tafel polarization curves were applied to illustrate the corrosion resistance of the coating. The results showed that the M-rGO/SiO 2 composite can disperse well in the coating and efficiently extend the corrosion path, enhancing the anti-corrosion property of the FEVE coating. Therefore, the |Z| 0.01 Hz of M-rGO/SiO 2 reinforced FEVE coating maintained at around 10 10 Ω·cm 2 in the 30 days test cycle and a protection efficiency of up to 95.18% was achieved.
研究领域:
材料科学
·
腐蚀与防护
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 26
·e52453
·
IF 3.057
Qingtao Zeng,Dehui Lai,Piming Ma,Xuejun Lai,Xingrong Zeng,Hongqiang Li
In recent years, piezoresistive pressure sensors with superhydrophobicity have aroused considerable attention. In addition, to comply with “sustainable development” strategy, the sensors fabricated with eco-friendly materials is of great theoretical and practical significance. Herein, tannic acid (TA) was first absorbed on the surface of poly(lactic acid) (PLA) nonwoven fabric by simple dipping method. After that, silver (Ag) particles were in situ generated on the surface to construct roughness with the reduction role of TA by immersing the fabric into silver nitrate aqueous solution. Finally, n-lauryl mercaptan was grafted on the Ag particles via Ag–S bonds to provide low surface energy, and a conductive and superhydrophobic PLA (CSPLA) nonwoven fabric was fabricated. The obtained CSPLA nonwoven fabric had a high water contact angle of 150.3°. The fabric-based piezoresistive pressure sensor possessed high sensitivity, fast response, good stability, and excellent reusability, and was successfully applied for detecting various human motions including voice recognition, joint bending, stomping, walking, and jumping. The fabricated sensor has great application potential in the fields of touchable displays, electronic skins, intelligent robotics, and wearable devices.
研究领域:
材料科学
·
传感器技术
·
可持续发展
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 30
·48910
·
IF 2.188
Kai An,Huiting Kang,Dating Tian
By combining the controllable core/shell strategy with graft copolymerization of polysaccharides, controllable core/shell magnetic molecularly imprinted polymers (MIPs) based on konjac glucomannan for selective recognition and enrichment of trichlorfon were fabricated and evaluated. By varying the dose of the polymeric precursors, the shell thickness of the core/shell structure could be regulated over a wide range. The magnetic nanoparticles encapsulated by polymers still had high magnetic performance and could be easily separated by an external magnetic field. The results of adsorption experiments showed that the MIPs could specifically recognize and adsorb trichlorfon with excellent selectivity, repeatability, and stability. The adsorption isotherm of MIPs could be fitted by the Langmuir equation. In addition, magnetic MIPs have been successfully applied to the detection of trichlorfon in real samples. Eco-friendly MIPs would be particularly suitable for the enrichment and separation of pesticide residues in food samples. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 137 , 48910.
研究领域:
食品科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）