ACS Applied Materials & Interfaces
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2016
·
IF 7.145
Hong-Qing Liang,Ke-Jia Ji,Li-Yun Zha,Wen-Bing Hu,Yang Ou,Zhi-Kang Xu
Polymer membranes with well-controlled and vertically oriented pores are of great importance in the applications for water treatment and tissue engineering. On the basis of two-dimensional solvent freezing, we report environmentally friendly facile fabrication of such membranes from a broad spectrum of polymer resources including poly(vinylidene fluoride), poly(l-lactic acid), polyacrylonitrile, polystyrene, polysulfone and polypropylene. Dimethyl sulfone, diphenyl sulfone, and arachidic acid are selected as green solvents crystallized in the polymer matrices under two-dimensional temperature gradients induced by water at ambient temperature. Parallel Monte Carlo simulations of the lattice polymers demonstrate that the directional process is feasible for each polymer holding suitable interaction with a corresponding solvent. As a typical example of this approach, poly(vinylidene fluoride) membranes exhibit excellent tensile strength, high optical transparence, and outstanding separation performance for the mixtures of yeasts and lactobacilli.
研究领域:
材料科学
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环境工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Zhe Wang,Yansha Zeng,Yue Shen,Qiyin Tan,Jiahao Sun,Jiaheng Teng,Hongjun Lin
Incorporating inorganic porous materials into polymer membranes presents a promising strategy to rectify their inherent imperfections. Nonetheless, achieving peak efficiency necessitates pores oriented perpendicular to the membrane surface, a feat that remains challenging due to orientation control complexities. In this study, a novel synthesis approach for two-dimensional (2D) mesoporous silica nanoparticles (MSN) featuring high aspect ratios and vertical pore channels is presented. These channels, oriented perpendicular to the membrane surface, optimize water permeability. This unique orientation is meticulously achieved via cetyltrimethylammonium bromide (CTAB) acting as a surfactant at the nexus of polar and non-polar fluids, guaranteeing interface evenness. Intriguingly, the resultant mesoporous compound harbors both micro and mesopores—a phenomenon attributed to surfactant non-polar segment expansion within non-polar solvents or the distinct U-shaped interface upon contact with hydrophilic mesoporous entities. After depositing a tannic acid (TA) coating on a polyvinylidene fluoride (PVDF) base membrane, 2D MSN was fixed on the membrane surface using polyethyleneimine (PEI) as a linker through strong hydrogen bonding . Thanks to the asymmetric structure of the mesoporous separation layer combining micro and mesopores , the perpendicular pore channels with superhydrophilic features, water can permeate through the separation membrane with the shortest distance and lowest resistance, achieving an ultra-high pure water permeation volume of 394.5 L −1 h −1 bar −1 . The uniform pore channels of 2D MSN show a rejection rate of over 97% for large molecular dyes such as Evans blue (EB), Congo red (CR), and Rose Bengal sodium (RB). This work not only advances the synthesis of two-dimensional materials with vertical pore channels but also underscores their potential in membrane separation applications.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Matter
·
2025
·
IF 17.5
Li Zeng,Dan Luo,Weishan Tang,Dayue Du,Hanna He,Chuhong Zhang
Achieving a high depth of discharge (DOD) in dendrite-free Zn anodes is essential for enhancing the energy density and cycling lifespan of zinc-ion batteries (ZIBs). However, conventional three-dimensional (3D) anodes featuring thick and disordered pore structures suffer from gradient and tortuous ion diffusion pathways, leading to mismatched electron/ionic transfer kinetics, which limit their DODs to usually lower than 40%. Herein, a low-tortuosity, N-doped 3D Zn anode is deftly crafted by 3D printing. The vertically aligned pore architecture significantly reduces electrode tortuosity, enabling rapid ion transport with shortened migration pathways. Meanwhile, the N-doped zincophilic surface substantially reduces the deposition energy barrier for uniform and compact Zn deposition even under high DODs. The resulting symmetrical cells exhibit dendrite-free cycling for 720 h at 1 mA cm −2 and 1 mAh cm −2 while sustaining stable plating/stripping processes at a high DOD of 61.7%. This work offers fundamental insights into the anode design philosophy for long-lasting and energy-dense ZIBs.
研究领域:
电化学储能
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材料科学
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能源化学
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先进制造
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纳米材料
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2025
·
IF 3.3
yuan yuan li,Zhe Zou,Mingqiang Ning,ming Gao,Qikui Man
Multifunctional integrated electromagnetic wave absorption (EMA) materials have been widely concerned. In this work, CoNi/MXene@Wood was prepared by carbonizing natural wood at high temperature and introducing CoNi and Ti3C2Tx MXene into its rectangular honeycomb unit by hydrothermal reaction and vacuum impregnation. Due to the reasonable control of structure and composition, CoNi/MXene@Wood can be employed for both electromagnetic protection and infrared stealth. CoNi/MXene@Wood-1.5 displays excellent EMA performance with a minimum reflective loss (RLmin) of −56.8 dB and the effective absorbing bandwidth (EAB) covering the entire X-band. Besides, with low and stable thermal conductivity (0.219-0.267 W m-1 K-1) over a temperature range of 298-673 K, the CoNi/MXene@Wood can realize the thermal infrared stealth of protected targets in different environments. The structure design and dielectric constant adjustment provide strategies for obtaining high EMA performance materials with infrared stealth.
研究领域:
材料科学
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电磁学
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纳米技术
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红外技术
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复合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
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2025
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IF 9.8
Yimin Qu,Changliang Lu,Gaofeng Zhang,Zhu Hu,Dajian Huang,Xiaohu Qiang,Yanping Wang
With the escalating global water crisis, solar-driven interfacial evaporation has garnered significant attention as a sustainable desalination technology. However, it still faces challenges such as low evaporation efficiency, salt accumulation, and insufficient durability under real-world conditions. To address these issues, this study used chitosan (CTS) as a matrix to disperse carbon nanotubes (CNTs) with the assistance of palygorskite (Pal). The resulting Pal-CNTs composites were incorporated into the CTS matrix to prepare high-performance aerogels aimed at enhancing solar interfacial evaporation efficiency. The results show that Pal effectively prevents CNT aggregation, enabling uniform dispersion within the CTS matrix and resulting in enhanced light absorption and thermal management. Inspired by the multichannel structure of plant xylem, CTS/Pal/CNTs composite aerogels (CPC) with vertical pores were fabricated using directional freeze-drying. The combination of superhydrophilicity imparted by CTS and Pal, along with the vertical pore structure, allows the CPC to efficiently store and transport water. The CPC can produce up to 13.1 kg m −2 of water per day in outdoor conditions. Moreover, the vertical pore architecture and continuous water supply enable rapid salt diffusion, effectively resisting salt crystallization and maintaining stable performance even in high-salinity brine. The resulting solar evaporator also demonstrates robust mechanical strength and long-term stability, showing great potential for practical freshwater production.
研究领域:
环境科学
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材料科学
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纳米技术
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化学工程
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2023
·Vol. 38
·期 2
·299-303
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IF 1.6
Fan Hui,Cai Yun,Bai Ping,Yuan Qinwen,Wang Dong,Chen Yuanli
Uniform monodispersed mesoporous silica nanospheres with vertical pores were successfully synthesized using chiral amphiphilic small molecule L-16Ala5PyClO 4 and solvents as dual templates via solgel transcription. The morphologies and pore sizes of silicas are adjustable by changing the type and amount of solvents in the reaction systems. With the increase of the organic solvent content, the morphologies of the obtained silica changed from nanospheres with vertical pore structures to nanosheets structures. When 1 mL of benzene, cyclohexane or toluene were used as solvents, only silica nanospheres were obtained, the BET surface areas of silica nanospheres reached 600.7, 669.5, and 560.8 m 2 /g, respectively. The pore sizes were 3.51, 3.54, and 3.46 nm, respectively. Significantly, these ordered silica nanospheres/poly(vinyl alcohol-co-ethylene) (PVA-co-PE) nanofiber membranes have high separation efficiencies (>99%) for n-hexane/water mixtures.
研究领域:
材料科学
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纳米技术
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环境工程
✓ 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）