JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 16
·
IF 1.768
Zhiyong Lv,Chonggang Wu,Jing Li,Xiao Fang,Dongdong Yu,Huchuan Qin,Peng Yu,Xuhuang Chen
A new high-ultraviolet (UV)-transmission silicone-resin polymeric material was prepared via curing during hydrosilylation of tetramethyltetravinylcyclotetrasiloxane with tetramethylcyclotetrasiloxane by a liquid-surface supernatant method, using a stepwise heating program to avoid spontaneous combustion of the reaction mixture. The relationships were investigated in detail between reactive groups, cross-linking density, mechanical and UV-transmission properties. For this purpose, UV transmittance and dynamic mechanical properties, respectively, of the silicone resin were measured with UV–visible spectrophotometry and dynamic mechanical thermal analysis. In addition, surface roughness was evaluated with an atomic force microscope as well as an interferometer. The curing process was monitored by Fourier transform infrared spectroscopy and rotational rheometry. The cyclic silicone oils were compared with linear ones in structure and product properties. The results indicated that stepwise temperature control during curing process was particularly indispensible due to the presence of active Si H bonds, and that the silicone resin of high modulus, high UV transmittance (92.7%) and low surface-roughness was largely homogeneous in cross-linking points distribution. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43308.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 35
·e55889
·
IF 2.7
Xiaohong Wang,Bin Yang,Yue Zhang,Yuqing Yang,Huijie Lu,Hao Wang,Ziyi Wang,Jiasheng Qian,Ru Xia,Ning Jia,Yuchao Ke
Phase-change materials (PCMs) have become a hot spot in the development of modern thermal management materials because of their absorbing and releasing heat while keeping the temperature constant during phase change process. However, their relatively low thermal conductivity (TC) considerably restricts their further application. In this work, graphene nanosheets (GNS) were initially nickel-plated to increase the contact area between adjacent GNS (in the form of Ni@GNS) by constructing a “point-surface” structure. Then, the prepared Ni@GNS was coated with polydopamine (PDA) to prepare PDA-Ni@GNS, which helped to effectively reduce the interface thermal resistance (ITR) between the filler and the matrix, and also made the prepared filler more easily dispersed in the polymer matrix. By constructing well-defined three-dimensional (3D) thermally conductive pathways in the matrix, the PCMs exhibited excellent TC and effectively prevented the leakage of polyethylene glycol (PEG) even at low filler loading. The results of thermogravimetry (TG), differential scanning calorimeter (DSC), and cyclic DSC tests jointly showed that the PDA-Ni@GNS/CNF-C/SA/PEG PCMs displayed excellent thermal storage properties, high latent heat as well as good cyclic thermal stability. The present study provides a facile way of preparing PEG-based PCMs, which are applicable in thermal management area.
研究领域:
材料科学
·
热能工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 15
·48558
·
IF 2.188
Yingzhe Li,Zhuo Li,Yang Gao,Lin Li,Yihan Yang
The weak interaction between the basalt fiber (BF) and acrylonitrile-butadiene rubber (NBR) weakens the BFs' effects on improving the tribological performances of the NBR composites. To solve this problem, (3-aminopropyl)triethoxysilane (APTES) was introduced via mixing into the matrix or grafting on the BF surface, respectively. The characteristics, mechanical, and tribological properties of the composites were evaluated, and the effects of the APTES and its introduction methods on the tribological properties were the main focus. The APTES mixed in the rubber matrix decreased the friction coefficient (COF) of the NBR-based composites under both dry friction and water-lubricated conditions. Especially, the APTES hydrolysis under water-lubricated condition was conducive to the formation of the water film and thus dramatically decreased the COF. The COF of the BF0-A3 and the BF12-A3 were 51% and 30% lower than that of the BF0-A0 and the BF12-A0 under water lubrication, respectively. The APTES grafted on the BF surface increased the wear resistance of the BF/NBR composites attributed to the improvement of the interaction between the BFs and the NBR matrix. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48558.
研究领域:
材料科学
·
摩擦学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 32
·e52774
·
IF 3.057
Mohamadou Al Hassan,Mehdi Derradji,Mohsen M. M. Ali,Abdullah Rawashdeh,Jun Wang,Zhong-Cheng Pan,Wen-Bin Liu
Polybenzoxazine (BA-a) based nanocomposites with varying amounts of Bi 2 O 3 particles reinforcement (10, 20, and 30 wt%) were produced. The structures of the Bi 2 O 3 before and after surface silane treatment, as well as the structures of the BA-a matrix and its nanocomposites, were all evaluated using Fourier transform infrared spectroscopy (FTIR). The thermal stability of the samples was evaluated by thermogravimetric analysis (TGA) and the resistance to bending was studied using the three-point bending test. Then, an artificial neural network approach was used to estimate the thermal degradation and flexural strengths of the polybenzoxazine matrix and its nanocomposites. The results of the TGA analysis showed that when Bi 2 O 3 content increased, the char yield ( Y c ) of the nanocomposites also increased from 27.98% to 43.53% for the experimental data and from 27.95% to 43 0.57% for the prediction, with all SD s less than 0.02. Moreover, both the experimental and predicted values of the flexural strengths for the unfilled BA-a displayed 100.40 and 102.96 MPa, respectively and these values increased to 119.65 and 114.95 MPa when 10 wt% of fillers were incorporated into the matrix. However, for higher filler contents, 20 and 30 wt%, these values decreased to 112.94 and 108.01 MPa for the experiments, and 106.35 and 103.20 MPa for the prediction, respectively. The very small deviations (<0.05) between the experimental and predicted values demonstrated that the prediction approach using the artificial neural network is reliable and accurate.
研究领域:
材料科学
·
化学工程
·
人工智能
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 10
·49970
·
IF 2.52
Zhijia Zhang,Hao Jiang,Rui Li,Shan Gao,Qiang Wang,Guojun Wang,Xiao Ouyang,Hao Wei
The high-damping property of polyurethane elastomers and the low density of the hollow glass microspheres (HGM) were used to prepare the sound insulation materials in the present work. The transmission loss (TL) was measured to evaluate the HGM content on the sound insulation properties. The experimental results showed that the addition of HGM improved the hardness and compression modulus of the HGM-filled polyurethane composites, and the loss factor (tan δ ) of polyurethane composites were greater than 0.9. The average transmission loss (ATL, from 63 to 6300 Hz) reached 37.32 dB when the content of HGM was 10 wt%. The ATL of the HGM-filled polyurethane composites with 15 wt% HGM in the damping control region and the mass control region were 31.94 and 46.78 dB, respectively. The synergistic effect of the microphase separation, the interfacial effect and the rigidity of polyurethane composites resulted in the improvement on sound insulation property. The polyurethane composite has a great potential application for the field of sound insulation materials.
研究领域:
材料科学
·
声学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 1
·49636
·
IF 2.52
Wei Xu,Shuangyang Li,Zhanpeng Ye,Jianhua Zhang,Liandong Deng,Anjie Dong
Although poly(vinyl chloride) (PVC) has been widely used as blood-contacting materials in extracorporeal circuits and indwelling medical devices, its hydrophobicity also is a limitation due to the adsorption of plasma proteins and the immediately followed thrombosis cascade and bacterial infections. Herein, we developed a mild and simple strategy for improving the hydrophilicity and antifouling properties of the surface via mussel-inspired chemistry. Different amounts of 1,3-Propanesultone (1,3-PS) were attached onto the polyethyleneimine (PEI), so as to modify it into the zwitterion, called PES X . Two layer-by-layer approaches about PES X grafting on PVC substrates were designed. One strategy was by coating PES X after coating polydopamine (PDA) on PVC surface, obtaining PDA-PES X coatings. The other was by grafting PES X after co-deposition treatment of PDA and PES X with appropriate feeding ratio on PVC, obtaining PDA/PES X -PES X coatings. The study results indicated that the PDA/PES 0.5 -PES 0.5 coatings with optimized PEI molecular weight and sulfonation degree, presented about 2.5–3 times reduction in BSA adsorption (0.77 μg/cm 2 ) compared with PDA/PES 0.5 (1.93 μg/cm 2 ) and PDA-PES 0.5 (2.26 μg/cm 2 ), and kept long time antifouling stability. Moreover, the more excellent antifouling performance of PDA/PES 0.5 -PES 0.5 was also seen on fibrinogen (Fg), γ-globulin (γ-GL), and the mixture of these proteins. Meanwhile, PDA/PES 0.5 -PES 0.5 could prevent the adhesion of blood components and bacteria on the surface as well as maintain excellent hemocompatibility and cytocompatibility. We had hopes that our simple and mild strategy will find practical application in surface engineering of clinical use in blood-contacting medical devices.
研究领域:
生物医学工程
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 31
·48919
·
IF 2.52
Ting Guo,Hongyuan Zhou,Yong Yu,Hongjie Dai,Yuhao Zhang,Liang Ma
A novel recognition material for detection of kinds of pyrethroids was successfully synthesized by molecular imprinting technology. 3-Phenoxybenzoic acid (PBA) usually could be the antigen to prepare the polyclonal antibody. In this work, the recognition material was prepared utilizing PBA as the template, methacrylicacid as the functional monomer and ethylene glycol dimethacrylate as the crosslinker. The recognition material was characterized by atomic force microscope, adsorption equilibrium and selectivity experiments. The results showed that the recognition material has been successfully prepared and recognized four pyrethroids (fenpropathrin, deltamethrin, fenvalerate, and cyhalothrin). The recognition material was utilized as sorbents in solid-phase extraction for separation and detection of pyrethroids in practically samples. Under the optimal conditions, the recoveries were ranging from 74.3 to 111.0%. Therefore, novel materials for pyrethroids are very promising for future applications. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48919.
研究领域:
分析化学
·
环境科学
·
农药检测
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 5
·49767
·
IF 2.52
Chengtian Xiong,Xiaoqing Li,Hezhi He,Bin Xue,Yi Wang,Jiqian Li,Zhiwen Zhu
Due to the disadvantages of lower tensile strength and fracture toughness, the widely application of Ethylene-propylene-diene-monomer rubber (EPDM) has been limited. In this study, a thermally reversible healing EPDM based elastomer with H-bonding and Zn-based-bonding dynamic cross-link network was prepared. The influence of mole ratio of ATA/MAH on tensile strength and fracture energy of mEPDM 0 -xATA was investigated. The results showed that increasing the content of ATA brings about a gradual improvement in tensile strength of the mEPDM 0 -xATA. Especially when the mole ratio of ATA/MAH is 1, the fracture energy of mEPDM 0 -ATA is dramatically enhanced to 33.9 MJ/m 3 , which is best among the ratios studied in our research. After curing, the effect of ZnCl 2 content on tensile strength and fracture energy of mEPDM-ATA-nZn was also studied. Meanwhile, the uniaxial cyclic loading-unloading tensile test was used to study the viscous damping properties of mEPDM-ATA-0.4Zn, which showed reversible repair properties after heat treatment. The results of dynamic rheological measurement showed that the damping properties were improved.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 33
·e52797
·
IF 3.057
Guanfei Liu,Meiling Guo,Shishan Xue,Xi Yang,Li Wang,Chuanxia Zhao,Dong Xiang,Hui Li,Jingjuan Lai,Zhenyu Li,Yuanpeng Wu
Recently, the wearable electronic devices have attracted extensive attention while the low stretchability and freezing-induced performance deterioration largely limit the applications in many fields. In this work, the poly(acrylamide- co -maleic acid) hydrogels are immersed in the triethylene glycol/sodium chloride/water solution to establish the dual-crosslinked organohydrogels, which present the extraordinary stretchability (1322 ± 75%) ascribed to the energy dissipation of physical interactions and stability of chemical crosslinked networks. Triethylene glycol forms strong hydrogen bonds with water, which interfere with the formation of intermolecular hydrogen bonds among water molecules at low temperatures and inhibit the formation of ice crystals in the organohydrogel networks. Sodium chloride imparts excellent electrical conductivity to the organohydrogel. As a result, a stretchable electronic sensor based on the organohydrogel is fabricated, which is strain-sensitive with a wide strain sensing window (0%–440%) and excellent stability. More importantly, the sensor based on the as-prepared organohydrogel could precisely detect various activities of the human model at −30°C leading to the widely application prospects.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 33
·50809
·
IF 3.125
Fei Song,Caoxing Huang,Xinbao Zhu,Chengguo Liu,Yonghong Zhou,Puyou Jia
An epoxidized cardanol tungoleate (ECT) based on tung oil and cardanol was synthesized through esterification and epoxidation. The chemical structure of the compound was verified by Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance ( 1 H-NMR). The plasticizing effects of ECT as the main plasticizer in poly(vinyl chloride) (PVC) was studied and compared with the commercial plasticizer dioctyl phthalate (DOP). The thermal migration stabilities, the thermal degradation process and the mechanical properties of PVC samples and the plasticization mechanism of ECT for PVC were investigated through the use of volatility, extraction, discoloration, and tensile tests as well as thermal gravity analysis (TGA), TGA–FTIR analysis, electronic universal testing machine and dynamic mechanical analysis (DMA). Compared with DOP, the ECT plasticized PVC can exhibits better thermal stability, more excellent tensile strength (17.28 MPa) and higher stretchability (629.41%), which is 1161% higher than DOP (1.37 MPa) plasticized PVC film. In addition, the migration resistance and volatility stability of ECT are much better than DOP. Therefore, this fully bio-based plasticizer based on tung oil and cardanol is a promising alternative plasticizer for PVC and may be an excellent phthalate substitute from the perspective of human health and sustainable development.
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
·
2022
·Vol. 139
·期 30
·e52676
·
IF 3.057
Jie Li,Shufen Zhang,Benzhi Ju
Most of the vitrimers based on transesterification (TE) highly rely on the usage of large amounts of catalysts to promote exchange reactions to obtain re-processability, which brings additional concerns on human health or environmental issues. Herein, we demonstrate that TE vitrimers with soft networks (low T g ), though free of catalysts nor any other special design, can be still dynamic enough to be easily re-processed. In this paper, fully bio-based and catalyst-free thermosets from epoxidized soybean oil (ESO) and bio-dicarboxylic acids (DA) were synthesized and found to possess decent re-processability. By means of compressive remolding (10 MPa, 160°C), the ESO-DA thermosets heal visible defects within 30 min and restore the mechanical strength within 3 h. Upon 3 times of mechanical recycling, the mechanical strengths remain nearly unchanged compared with those of pristine thermosets. Stress relaxation experiments confirm the network rearrangement at high temperatures (≥150°C) as well as vitrimeric flow of the materials. The materials are also capable of being welded without solvents under a small pressure. Lastly, a facile fusion method was employed to tune the mechanical strength of the recycled ESO vitrimers.
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 30
·50713
·
IF 3.125
Qian-Qian Gu,Cui-Liu Fu,Zhao-Yan Sun
To avoid the peeling-off of ceramic nanoparticles (NPs) from polyolefin membranes usually occurred in commercially available ceramic NPs coated polyolefin separators for lithium batteries, we propose a simple one-pot in-situ reaction method to modify commercial polyethylene (PE) separators by surface grafting 3-Aminophenol/formaldehyde (AF)/silica (SiO 2 ) composite NPs. The AF/SiO 2 composite NPs form self-supporting connected pores on the modified layer of the separator surface, which ensures the transportation of Li + . Moreover, the PE@AF/SiO 2 separators has higher electrolyte wettability and compatibility than neat PE separators attributed to the plentiful polar functional groups in the AF/SiO 2 layer and AF/SiO 2 composite NPs, resulting in higher lithium ion transference number ( = 0.62) and ionic conductivity (σ = 0.722 mS cm −1 ). More importantly, the discharge capacity, capacity retention rate and coulombic efficiency (136.2 mA h g −1 , 87.9% and 99%, respectively) after 200 cycles of Li|NMC half batteries with PE@AF/SiO 2 separators, are all more excellent than that with the pure PE separator (125 mA h g −1 , 83.1% and 85%, respectively). Our results show that the PE@AF/SiO 2 separators obtained by this modification method have higher electrochemical stability in the lithium battery system.
研究领域:
材料科学
·
电化学
·
纳米技术
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）