JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Jiyuan Feng,Nan Lv,Cheng Liu,Zhiwei Lyu,Yuteng Zhang,Haifeng Zhang
Facing increasing electromagnetic radiation pollution, soft sensors with electromagnetic interference (EMI) shielding is highly desirable. Here, flexible electromagnetic shielding [polyacrylonitrile/Fe 3 O 4 /polyaniline]//[multiwalled carbon nanotube/polyvinyl pyrrolidone] (denoted [PAN/Fe 3 O 4 /PANI]//[MWCNT/PVP]) Janus membrane is reported for pressure and sliding sensing. The [PAN/Fe 3 O 4 /PANI] layer of Janus membrane as the force and sliding sensing unit can generate direct current-type (DC-type) voltage signals by conducting polymer/metal Schottky junction, whereas [MWCNT/PVP] layer serves as main electromagnetic shielding unit. Under the vertical force and horizontal sliding of aluminum (Al) foil, it can output DC-type voltage signals based on the Schottky contact. The performance of [PAN/Fe 3 O 4 /PANI]//[MWCNT/PVP] Janus membrane for pressure and sliding sensing is appropriately explored and assessed. Moreover, the Janus membrane exhibits excellent shielding effects with average EMI shielding effectiveness (SE) of 37.54 dB in 8.2–12.4 GHz (X-Band) frequency ranges. Thus, based on the asymmetrical double-layer structure, soft DC-type sensor with EMI shielding is achieved, showing utilization potential in wearable electronics and intelligent robots.
研究领域:
材料科学
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电气工程
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传感器
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纳米技术
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可穿戴技术
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Mingti Wang,Shixun Hu,Wenjia Zhang,Yuxiao Zhou,Shangshi Huang,Jiahui Zhang,Qi Zhang,Changlong Yang,Qi Li,Hao Yuan,Jinliang He
Polypropylene (PP) is believed to be a rather promising cable insulating material for high-capacity electric power system with low carbon emission due to its decent thermo-resistance and recyclable nature. In this paper, a new dually chemical grafting modification strategy by methyl acrylate (MA) and acrylic acid (AA) is put forward to tailor the charge transportation behavior in PP, thus further enhancing the electrical properties. Experimental results indicate that the dually grafted PP with 2.3 weight percent (wt%) MA and 1.9 wt% AA shows enhanced volume resistivity and electrical breakdown strength than pure PP, and the space charge injection is significantly suppressed. This work further adopts thermally stimulated depolarization current (TSDC) test and computational analysis based on density functional theory (DFT) to reveal the mechanism of enhancement. The analysis shows that grafted chemical groups can introduce quantities of deep traps and electrostatic potential wells which are strongly correlated with the carbonyl group and would hinder the charge transportation thus improving the electrical insulating performances of PP. This work would provide a new route of PP-based dually grafting modification for the development of high-voltage cable insulation.
研究领域:
材料科学
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电气工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yijiang You,Li Liu,Guangfeng Wu
With the rapid advancement of the printing and dyeing industry, water pollution has emerged as a prominent environmental issue, particularly dye wastewater. In order to construct polymeric adsorbents with rich functional groups for efficient adsorption of dye wastewater, hydrogel spherical adsorbent SA/CMC-Kaolin was prepared by using sodium alginate (SA) as the hydrogel skeleton material, carboxymethyl cellulose (CMC) and kaolin as the strength-reinforcing materials. FT-IR, SEM, XRD, and TG were utilized for comprehensive characterization of the microbeads' characteristics and adsorption mechanism. SA/CMC-K composite microbeads were investigated for the adsorption characteristics of methylene blue (MB) in aqueous solution. Adsorption kinetics and thermodynamic models were employed to analyze the adsorption process. Under optimal conditions, SA/CMC-K microbeads demonstrated superior adsorption efficiency for MB, with a maximum adsorption capacity of 84.63 mg/g, a bio-based adsorbent with a high adsorption capacity. The adsorption process exhibited better agreement with the Langmuir isotherm equation and the pseudo-second-order kinetic model. Besides, SA/CMC-K composite microbeads maintained 71.74% adsorption efficiency after five cycles. Overall, the prepared microbeads, which are economical and environmentally friendly, are promising for the absorption of dye wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xinjian Zheng,Fei Qi,Qiao Zhang,Xianghua Yu,Huabo Huang,Jiayou Ji,Liang Li
As the demand for high-performance energy storage devices continues to boom, the electrode materials with large specific capacitance and long-term stability for supercapacitors have garnered significant attention. In this study, gallic acid (GA)-incorporated polyaniline (GA/PANI) nanomaterials were prepared through in situ polymerization in different reaction temperatures and different feed proportions. The formation and physicochemical features of GA/PANI were certified by XRD, FTIR, UV-Vis, and SEM analysis. The electrochemical analysis revealed an enhanced specific capacitance of 635 F g −1 at 0.5 A g −1 and a capacitance retention of 96.0% after 10,000 cyclic voltammetry tests at a scan rate of 200 mV s −1 for GA/PANI1:10. The assembled supercapacitor based on GA/PANI1:10 displays a high energy density of 49.2 Wh kg −1 at a power density of 301 W kg −1 . Therefore, these results verified the suitability of GA/PANI nanomaterial as an electrode material for the practical application in supercapacitor with long-term reliability and rate capacity.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Dongyu You,Dengyue Mao,Xiuhua Li,Yigang Yu
Exploring the interplay between side-chain structures of ionomers and “active” micro/nanoporous substrates, along with its impact on the structure and performance of composite membranes, is beneficial for developing high-performance anion exchange membranes (AEMs) for electrodialysis desalination. Herein, a series of tandem di-cation ionomers with hydrophobic alkyl side chains of varied lengths were synthesized, and pore-filled composite AEMs were developed using ultrathin microporous polyethylene (PE) as substrate. The structural and functional properties of these composites were systematically studied benchmarking with their ionomer membranes. The results reveal that space binding of pore walls restricts water uptake and swelling of conductive phases in composites with short side chains (≤ 6 carbons), leading to marginally enhanced mechanical strength and ion selectivity but slightly reduced conductivity. Pore-filling with longer side-chain ionomers induces interface-induced assembly, improving the interface connection between the ionomers and substrate. The space binding and interface-induced assembly collectively change the ionomer phase structures of composites. Notably, QPT-C18@PE with the longest hydrophobic side chains achieves exceptional performance including 95.45% current efficiency, high salt flux (81.02 mg m −2 s −1 ), low energy consumption (1.61 kWh kg −1 NaCl), and robust stability during electrodialysis. This work provides insights into designing advanced composite AEMs for efficient desalination applications.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 43
·e56146
·
IF 2.7
Shuang Zhao,Gongying Ding,Xin Yu,JingJing Si,Junyan Wang
The aim of this research was to investigate asphalt effects on the storage stability, mechanical properties and micro-properties of cold-mixed epoxy asphalt binder (CEAB). Firstly, four CEAB were prepared with four base asphalt types and storage stability, miscibility analyses were performed by fluorescence microscopy (FM). Then, cured CEAB and epoxy resin (ER) were treated by ultraviolet aging. Tensile test, dynamic mechanical analysis (DMA), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy were applied to clarify the mechanical properties and micro-properties of aged and unaged CEAB. Also, bending beam rheometer (BBR) tests were conducted to study low-temperature performance of CEAB. The results revealed that the CEAB prepared with asphalt with penetration grade 60 ~ 80 presented superior storage stability, miscibility, mechanical properties and that prepared with penetration graded 80 ~ 100 showed slightly better low-temperature performance. Moreover, asphalt properties were found to have little impacts while epoxy resin played a key role in the mechanical properties of CEAB. Glass transition temperature ( T g ) of the CEAB containing penetration-graded asphalt 80 ~ 100 decreased more significantly than that with penetration-graded asphalt 60 ~ 80, and it was also found that the CEAB prepared with base asphalt with higher molecular weight polydispersity index had better ductility performance.
研究领域:
材料科学
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土木工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 26
·e55574
·
IF 2.7
Wang Zhan,Jinhong Mo,Xin Feng,Zhiyuan Xu,Lixia Li,Le Chen,Qinghong Kong,Qingwu Zhang,Mingyi Chen,Juncheng Jiang
Silk fibroin was used to enhance the properties of the fireproof coating, ensuring the safe evacuation of occupants in a fire accident. The effects of biomaterial on the properties of the coatings were investigated by fire protection test, thermogravimetric analysis, limited oxygen index, vertical flame test, water resistance test, and mechanical properties test. The carbon layers were characterized after the fire protection test by scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy to analyze the microstructure and chemical composition. The results show that the coating with 6% SF demonstrated the best fire protection, thermal stability, and water resistance. The temperature on the backside is only 255.9°C, and the residual weight is 37.52%. However, the coating with 4% SF exhibits good mechanical properties.
研究领域:
材料科学
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火灾安全工程
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生物材料学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Tao Wang,Jiajia Ye,Shuning Liu,Xiaobo Liu,Lifen Tong
Melamine-based benzoxazine resins overcome the disadvantages of conventional polybenzoxazine, such as high brittleness and difficult processing. However, the reactivity is too high to be easily processed. In this work, phenolphthalein-type melamine-based benzoxazine (PTma-BG) was synthesized from paraformaldehyde, phenolphthalein, melamine, and benzeneguanoamine. The chemical structure of PTma-BGs was characterized by fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance ( 1 H NMR), and the curing behavior and properties of the resulting polymers were verified. The results demonstrate that the incorporation of benzeneguanoamine facilitates the formation of the oxazine ring while simultaneously reducing the reactivity of the PTma-BGs precursor, prolonging the gelation time, and expanding the processing window. Poly(PTma-40BG) has good thermal stability; it has been observed that the T d5 of Poly(PTma-40ma) reaches 328°C, which is higher than that of Poly(PTma). Furthermore, Poly(PTma-BG)s demonstrate exceptional heat resistance, with a glass transition temperature exceeding 285°C. The introduction of benzeneguanoamine results in a reduction in the number of polar groups, which in turn leads to a decrease in both water absorption and dielectric constant.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Wu Yang,Wenhao Liu,Mengze Zheng,Cong Zhu,Tianqi Li,Yunjun Luo
A polyol bonding agent (BA) was utilized to enhance the mechanical properties of propellant with low aluminum content. Through scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) analysis, it was discovered that BA can physically bond to the surfaces of ammonium perchlorate (AP) and hexogen (RDX). The results of mechanical testing showed that the use of BA can significantly improve the mechanical properties of propellants. Specifically, as the amount of BA increases, the maximum tensile strength ( σ m ) of the propellant also increases, the fracture elongation ( ε b ) initially increases and then decreases, the “dewetting ratio” continuously decreases, and the creep resistance of the propellant also increases. At a BA content of 0.2%, the σ m of the propellant reaches 0.6 MPa, the ε b exceeds 50%, and the “dewetting ratio” is less than 1.1.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Song Wang,Rumeng Ma
Two phosphorus-containing silane coupling agents (PSCAs), KH550-P and KH560-P, are successfully prepared by reacting 10-hydroxy-9,10-dihydro-9-oxa-10-phosphorus-10-oxide (DOPO OH) with (3-aminopropyl) triethoxysilane (KH550) and 3-glycidyloxypropyltrimethoxysilane (KH560), respectively. These two PSCAs are used as the surface modification agents of ammonium polyphosphate (APP). The flame retardancy and mechanical properties of epoxy resin (EP) with PSCA-modified APP are investigated. When the weight ratio of APP to PSCAs is 18:2 and the addition amount of PSCA-modified APPs, APP-KH550-P 18:2 and APP-KH560-P 18:2 , in EP reaches 8%, the resulting flame-retardant EP composite materials, EP/APP-KH550-P 18:2 and EP/APP-KH560-P 18:2 , exhibit good flame retardancy of a V-0 rating in the vertical combustion test (UL-94). The limiting oxygen index values of both EP/APP-KH550-P 18:2 and EP/APP-KH560-P 18:2 are higher than 30%. The peak heat release rates of EP/APP-KH550-P 18:2 and EP/APP-KH560-P 18:2 decrease by 13.8% and 28.5%, respectively, compared to EP containing 8% APP (EP/APP). Both KH550-P and KH560-P demonstrate similar performance in enhancing the flame retardancy of APP. When APP-KH550-P 18:2 is added to EP, the mechanical properties of EP/APP-KH550-P 18:2 are found to be similar to those of EP/APP. Conversely, the tensile strength and impact strength of EP/APP-KH560-P 18:2 increase by 23.8% and 74.3%, respectively, compared to EP/APP. KH560-P shows significantly better performance in the flame-retardant EP.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 36
·e55923
·
IF 2.7
Wenxuan Zheng,Guoliang Zhang,Jian Qi,Shichao Lu,Yang Li
The functional group in the molecular chain of lubricants is a key factor for a boundary lubricating film, which can further enhance the friction performance by interfacial tribochemistry. In this paper, the tribological behavior of epoxy/graphene (EP/Gra) composites was investigated through varying lubrication conditions, including dry friction, or different lubricants (such as water, hexadecane, oleylamine, and oleic acid). The porosity and Shore hardness (SHD) of the EP composites were significantly improved by the addition of graphene. Results showed that the porosity of the EP/0.75 wt.% Gra composites was reduced by 75.6% and their SHD increased by 5.4 compared with the EP/0.05 wt.% Gra composites. The average coefficient of friction (COF) of the composites was reduced by at least 27.3% under dry friction conditions. For water as lubricant, the EP/0.5 wt.% Gra composite exhibited the lowest COF (0.0455). The EP/0.75 wt.% Gra composite displayed the lowest COF (0.0466) when hexadecane acted as lubricant. By contrast, EP/0.05 wt.% Gra showed the lowest COF (0.0389) with oleylamine as lubricant, and the EP/0.25 wt.% Gra composites gave the lowest COF (0.0433) under oleic acid. The amine group of oleylamine reacted with the EP group to form a hydroxyl group, resulting in a polymer with low friction adhered to the friction interface. Simultaneously, the EP group reacted with the carboxyl group, forming a network of hydrogen bonds with graphene, which reduced the shear stress on the friction interface. Therefore, the functional groups of lubricants have a vital influence on the tribological properties of frictional composites, which may provide a new approach to solving the problem of wear.
研究领域:
材料科学
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摩擦学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Man Liu,Tong Song,Xuan Wu,Qian Li,Shiwei Wang
In this paper, the foamed polylactic acid (PLA) composites with different ratios of titanium dioxide (TiO 2 ) and lignin (Lg) are prepared. Molecular dynamics simulation analysis indicates that the fillers enhance the mechanical properties of the composites. The optimal foaming temperatures for PLA/Lg and PLA/TiO 2 composites are found to be 110 and 100°C, respectively. The supercritical carbon dioxide foaming process is applied to get the foamed composites, and their mechanical and thermal properties are analyzed. The results show that the addition of TiO 2 improves the melting point and compression properties of the PLA composites. Furthermore, the inclusion of Lg increases the molecular chain mobility, foaming multiplicity, and compression strength of the composite materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）