Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Yanming Wang,Yao Wang,Bihai Su,Feibo Li,Linlin Shi,Xiaojing Wang,Lingwei Li,Jiale Zhao,Tianlong Wang,Ping Li,Xiaoliang Zhang,Jingbo Mu,Gai Zhao,Yu Dong
Proton exchange membrane (PEM) is widely implemented as a pivotal component in fuel cell technology. However, cost-effectiveness and complex preparation protocols of commercial PEMs remain major challenges for PEM applications. In this paper, a variety of sulfonated polyimide (SPI) composite films filled with ionic liquids @ molybdenum sulfide (ILs@MoS 2 ) are prepared, which simultaneously yield superior proton conductivity and reduced pollution with feasibility. It is found that with increasing the ILs@MoS 2 ratio, composite films with an ILs@MoS 2 content of 1.5 wt% exhibit a significant improvement of 68 % in proton conductivity, increasing from 0.0778 to 0.1308 S/cm at 80 °C under 100 % relative humidity (RH). This result is believed to be partly attributed to the presence of the dense network of active sites and hydrogen bonds promoted by ILs@MoS 2 . Overall, SPI composite films modified by ILs@MoS 2 demonstrate potential as alternatives for applications in PEM technologies.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
RSC Advances
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2024
·Vol. 14
·期 24
·16828-16834
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IF 3.9
Hangdong Chen,Xun Sun,Ying Wang,Lixian Shi,Xuan Liu,Nantao Hu
Particulate air pollution is a global environmental problem, with PM2.5 being the primary pollutant. One of the most effective ways to remove particles from the air is through filtration. Therefore, high-performance air filters are urgently needed to combat the harm caused by PM2.5. This study uses an electrospinning technique to prepare high-efficiency polyvinylidene fluoride/graphene oxide/polyimide nanofiber membranes. These composite nanofiber membranes demonstrate high filtration efficiency (99.6%), low pressure drop (123 Pa), remarkable thermal stability (450 °C), and excellent mechanical strength (7 MPa). Considering the advantages, these highly efficient nanofiber membranes can find advanced applications in industrial and civil infrastructures.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2024
·
IF 5.3
Jing Yan,Kaibo Wang,Yaqian Wang,Mengdie Lv,Guang Yang
The triboelectric nanogenerator (TENG) has been considered as an effective way to convert various mechanical energies into electrical energy. However, the energy output needs continuous improvement for potential applications. In this study, triboelectric layers composed of polyimide (PI) matrix and carbon nanotube@barium titanate (CNT@BTO) nanoparticles were developed to achieve the performance enhancement through the synergistic coupling of piezoelectric and triboelectric effects as well as the microcapacitor function. To achieve the purpose, CNT@BTO nanoparticles were synthesized by the chemical vapor deposition method and then incorporated into a flexible PI triboelectric layer prepared using electrospinning technology and thermal imidization. The results showed that when the BTO content was 26 wt % and the CNT content was 2 wt %, the open-circuit voltage and short-circuit current of a TENG based on a PI/CNT@BTO nanofiber membrane reached 305 V and 104 μA, which were 3 times higher than those of a pure PI-based TENG. The TENG demonstrated sufficient power to drive small electronic devices, such as calculators, and to light up 124 commercial green LED and 18 blue COB light sources. Additionally, the TENG was integrated into a real-time temperature-sensing alarm system, showcasing its potential application in safety-related fields. The study demonstrated the feasible methods for TENGs’ performance enhancement and provided potential application fields of energy-harvesting and self-powered sensing systems.
研究领域:
材料科学
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纳米技术
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能量转换
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传感器
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Hongmei Qin,Ziwei Li,Shiyu Qin,Yanda Jiang,Man Liu,Ling Zhou,Siyu Yu,Shan Wang,Chuanxi Xiong
High-temperature polymer dielectric capacitors are urgently needed in the new-generation electronic and electrical systems. Whereas, current commercial polymer represented by polyimide (PI) suffer from exponentially growing conduction loss at high temperatures and high electric fields, and hence extremely low discharged energy density and sharply declined charge-discharge efficiency. In this work, we developed superior Al 2 O 3 /PI/Al 2 O 3 sandwich films with drastically improved capacitive energy storage performance via atomic layer deposition (ALD) technology. Notably, resultant PI hybrid dielectrics deposited by 130 nm-thickness Al 2 O 3 (Al 2 O 3 /PI/Al 2 O 3 -130nm) exhibits the highest breakdown strength and the lowest leakage current density compared to pristine PI. Consequently, Al 2 O 3 /PI/Al 2 O 3 -130nm delivers a discharged energy density of 4.9 J/cm 3 at 25 °C and 3.3 J/cm 3 at 150 °C, as high as 2.7 times and 3.3 times respectively that of near PI film. Moreover, PI hybrid dielectrics can operate steadily under 200 MV/m and 150 °C during 10,000 cycle measurements. The excellent performance is mainly attributed to the improved barrier height of the electrode/PI interface endowed by deposited large-bandgap Al 2 O 3 .This work provides a scalable approach to enable excellent high-temperature energy storage performance of polymer dielectrics and promising to promote the application of PI for capacitive energy storage under harsh conditions.
研究领域:
材料科学
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电气工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Feng Wang,Hao Wang,Xiaoming Shi,Chunli Diao,Chaolong Li,Weikun Li,Xu Liu,Haiwu Zheng,Houbing Huang,Xiaoguang Li
High-temperature polymer-based dielectric capacitors are crucial for application in electronic power systems. However, the storage performance of conventional dielectrics polymer dramatically deteriorates due to the thermal breakdown under concurrent high temperatures and electric fields, and there are hardly reports on the causes of thermal breakdown from the aspects of the high-temperature conduction loss and Joule heat dissipation. Herein, a combined strategy of crosslinking and compositing for polyimide-based composites is proposed, which minimizes the thermal breakdown by significantly inhibiting the high-temperature conduction loss and enhancing the thermal conductivity. Furthermore, the rationale of the strategy was theoretically and experimentally verified from multiple perspectives. The charge-trapping effect is directly observed by Kelvin probe force microscopy probed (KPFM) with nano-level resolution and quantitatively by thermally stimulated depolarization current measurements, indicating that the crosslinking network introduces local deep traps and effectively suppresses the charge transport. The thermal conductivity of the composites inhibits the high-temperature thermal breakdown, which is confirmed by phase-field simulations. Consequently, the optimized composites possess an ultra-high discharge energy density ( U d ) of 5.45 J/cm 3 and 3.54 J/cm 3 with a charge–discharge efficiency ( η ) of 80 % at 150 and 200 °C, respectively, which outperforms the reported polyimide-based dielectric composites. This work provides a scalable direction for high-temperature polymer-based capacitors with excellent performance.
研究领域:
材料科学
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电子工程
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Bo Mu,Yun'an Li,Kang Du,Xiaoqin Dai,Li Tian,Junhong Guo,Baoping Yang,Jinfeng Cui,Xuemei Bao
Dimensionally stable and high strength Polyimide(PI)/nKevlar composite aerogels are fabricated by the inclusion of nano Kevlar fibers with PI precursor polyamide acid via solution mixing and subsequent vacuum drying. The rigid macromolecular structure of nKevlars and the intermolecular hydrogen bonding result in lower shrinkage/density and larger porosity. The PI/nKevlar composite aerogels demonstrate a 23.4% reduction in the linear shrinkage. Compared with pure polyimide aerogel, the friction coefficient and wear rate of composite aerogel decreased significantly, with the dry friction wear rate of the PI/nKevlar-1.0 reduced by 34.14% and the friction coefficient of the oil-containing aerogel reduced by 28.29% ascribing to the increased loading bearing of the composite.
研究领域:
材料科学
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摩擦学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Jun Hu,Jiangzhou Luo,Yuxuan Zhao,Min Chen,Honglei Ling,Xiaoting Zhou,Song Xue
Constructing membranes that possess both exceptional gas transport property and strong resistance to CO 2 -induced plasticization is a crucial need in membrane separation , yet it still stands as an ongoing challenge. In present study, we firstly added the bromine atom into the 2, 2′-bis(trifluoromethyl)benzidine (TF) to synthesis two new bromine substituted diamines, and subsequently one of the brominated diamines was employed as a comonomer alongside commercial tris(4-aminophenyl)amine (TAPA) and dianhydride 6FDA to prepare the network polyimide (PI) membrane via copolymerization . Following this, these new brominated PIs would undergo debromination process during the subsequent heating treatment. As a result, the bromination/debromination effect created new microporosity , which increased the d-spacing and BET surface area of the membrane, thereby largely enhancing the crosslinked PI membrane’s gas separation performance. Moreover, the robust network structures achieved through in-situ crosslinking way, derived from a segment of trifunctional TAPA monomers , enhance the resultant membrane's resistance to CO 2 plasticization issue. An exemplified membrane referred to as 6 F-TA/TF-dBr-450 membrane displays outstanding CO 2 /CH 4 separation capabilities, with a CO 2 permeability of 1420.56 Barrer and a CO 2 /CH 4 selectivity of 39.67, surpassing the 2008 Roberson upper bound by a considerable margin. Besides, this membrane demonstrates outstanding durability against CO 2 -induced plasticization, showcasing its strength under pressures of at least 35 Bar.
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 POLYMER SCIENCE
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2024
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IF 3.9
Zhaohui Lu,Dongpeng Li,Qian Gu,Guangtao Qian,Dandan Li,Chunhai Chen
Two novel diamines 1-(4-aminophenyl)-1,3,3-trimethyl-2,3-dihydro-1H-indene-5-amine and 4-amino- N -(4-(5-(4-aminobenzamide)-1,3,3-trimethyl-2,3-dihydro-1H-inden-1-yl) phenyl) benzamide containing indene and amide groups were successfully designed and synthesized, and a series of colorless polyimides (CPIs) derived from the two diamines with 1,2,4,5-cyclohexanetetracarboxylic dianhydride in various ratios were copolymerized. The introduction of aliphatic ring structures was conducive to the improvement of optical properties, while the incorporation of amide groups improved thermal and mechanical properties. These CPI films exhibited excellent optical properties ( T 400 > 80%), high heat resistance ( T g > 300 °C) and mechanical properties with the synergistic action of the two groups. Furthermore, the effect of the content of amide groups on the intermolecular interaction of CPIs was systematically analyzed. This study provides a fancy method for the development of heat-resistant colorless materials for optical applications. Graphical
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
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Changbo Xie,Jing Zhang,Zhiqiang Shan,Chaowang Guo,Liming Tao,Yaoming Zhang,Tingmei Wang,Qihua Wang
The rigid chain structure of polyimide (PI) provides exceptional mechanical strength, outstanding thermal stability, and excellent chemical resistance. However, it severely limits its self-healing capabilities, which require a high degree of chain segment mobility. Achieving both high performance and rapid self-healing in PIs is critical for applications in aerospace and other demanding environments, yet it presents a significant challenge. Here, we innovatively constructed a hierarchically dynamic dual-network in PI architecture through molecular topological design—featuring B 3 O 3 as reversible chemical crosslinks and reduced graphene oxide (rGO) mediated hydrogen-bond networks as physical dissipation units. This innovative composite structure achieves high-performance Boroxine-containing polyimide (BPI) — Tensile strength is 111.3 MPa, Young's modulus is 2.63 GPa, fracture toughness is 12.56 MJ/m 3 and T d5% is 536 °C, while enabling record-fast, on-demand damage healing within just 5 min under simple near-infrared (NIR) irradiation. Notably, it also enables the regulation of frictional properties through light control, with a friction coefficient range of 0.277 to 0.122. By integrating photo-controlled self-healing with intelligent friction modulation, this approach sets a new paradigm for designing adaptive smart materials capable of withstanding complex operational environments.
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 53
·期 6
·3320-3328
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IF 2.2
Liang Yuzhou,Li Ting,Wang Xue,Yang Chao
Nitrogen-doped carbon is a major class of high-performance electrode materials for the electrochemical supercapacitor. Herein, nitrogen-doped carbon was obtained by pyrolysis to graphene-grafted polyimide precursors on carbon cloth through in situ polymerization. The morphology, structure, and electrochemical properties of flexible electrodes were investigated in detail. Scanning electron microscopy (SEM) confirmed the preparation of nitrogen-doped carbon on carbon cloth. X-ray photoelectron spectroscopy (XPS) characterization showed the doping of the N heteroatom. Flexible electrodes obtained with the optimized mass graphene delivered high specific capacitance of 669 F g −1 at 0.5 A g −1 and good cycle stability, with retention of 122.3% capacitance after 6000 cycles in a three-electrode system. These typical flexible electrodes show great potential in wearable energy storage devices.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Ji Ma,Wen He,Weiwang Lim,Jingcheng Du,Qian Sun,Shabi Ul Hassan,Dong Cao,Jian Guan,Jiangtao Liu
Polyimide membranes offer the potential of industrial natural gas sweetening to effectively diminish carbon dioxide from raw streams, but it remains a challenge to improve the separation selectivity and further overcome the trade-off limitation through synthesis design. Here, we present an A 2 +B 2 +B 3 strategy to fabricate a series of polyimides containing hyperbranched network structures by copolymerizing the triamine monomer (TAPA) in conjunction with linear 6FDA-6FAP. The chemical structures and physicochemical properties of polyimides were confirmed by SEM, FTIR, XPS, TGA and XRD. The molar ratio changes of 6FAP/TAPA finely tailored the fractional free volume from 16.9 % to 13.1 % and brought about high packing efficiency, leading to a surge in separation selectivity. The 6FDA-6FAP/TAPA (7:3) membrane exhibited a maximum CO 2 /CH 4 selectivity of 134.5 with a permeability of 26.9 Barrer, improving the CO 2 /CH 4 separation performance of 6FDA-6FAP from far below the 1991 limitation to beyond the 2008 Robeson's upper bound line. Diffusivity and solubility acting as the main factors that govern the gas separation were also carefully investigated. Additionally, 6FDA-6FAP/TAPA(7:3) demonstrated high CO 2 /CH 4 binary gas separation performance, good high-temperature (105 °C) reversibility, great plasticization resistance (20 bar) and moderate long-term stability (360 days) under practical working conditions. These results indicate that hyperbranching of polyimide can be successfully controlled to enhance the separation properties, which facilitate the development of high-performance gas separation membranes with topological microstructures.
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
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
He Bai,Yunting Hu,Yongliang Zhao,Xiaomin Zhu,Jianhua Hu,Haitao Wang
Aromatic polyimide is widely used in microelectronics as dielectric packaging layers. There is a high demand to reduce its dielectric constant to meet the fast development of communication technology. Here we report a simple and eco-friendly approach to preparing polyimide films with a lowered dielectric constant by adding silica hollow nanospheres with an average size of 100 nm in an aqueous solution of poly(amic acid) salt, and subsequent film casting and thermal imidization. The silica hollow nanospheres present a uniform distribution in polyimide matrix after surface modification with 3-aminopropyltriethoxysilane. The dielectric constant of the resulting composite films decreases linearly with particle loading till 15 wt% and reaches the lowest value of 2.5. The surface hardness and elastic modulus of the films improve by adding hollow nanospheres, while maintaining high optical transparency, high flexibility and a low coefficient of thermal expansion.
研究领域:
材料科学
·
电子工程
✓ 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）