ACS Applied Polymer Materials
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2020
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IF 0
Zhenzhen Wei,Jiayi Gu,Fengrui Zhang,Zhijuan Pan,Yan Zhao
Endowing separators in lithium ion batteries with highly sensitive shutdown function and good thermal stability is critical for the large-scale energy storage application of lithium ion batteries. In this work, a thermally induced shutdown separator with high thermal sensitivity and stability has been successfully fabricated via coaxial electrospinning of polyacrylonitrile (core) and poly(butylene succinate) (shell) (PAN@PBS). The separator is composed of core–shell structured and intersected nanofibers, which brings about the high porosity, excellent electrolyte wettability, and desirable electrolyte uptake. Meanwhile, the coaxial nanofibrous separator exhibits prompt shutdown response at 110 °C and remains structural integrity at 250 °C, indicating the coexisting characteristics of high thermal sensitivity and high thermal stability. Moreover, compared with the Celgard separator, the coaxial nanofibrous separator displays stable electrochemical properties in terms of higher ionic conductivity (2.1 mS cm–1) and superior cycling stability with capacity retention of 93.2% after 100 cycles at a 1 C rate and higher rate capability. Considering the high safety and good electrochemical performance, the as-prepared PAN@PBS nanofibrous membrane is a promising separator candidate for lithium ion batteries with enhanced safety.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2025
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IF 8.9
Suyun Tian,Chuankai Yang,Yingzi Gu,Shengzhe Zhao,Xian Jian
Single-type carbon material is often limited in its application in the field of intelligent absorption due to their lack of outstanding performance. However, traditional physical mixing methods are difficult to achieve effective interface bonding and multifunctional coupling of carbon materials. Here, we developed an effective method to prepare the entangled CNTs anchoring in graphene for intelligent absorbing materials possessing thermal sensitivity effect combing hydrothermal and CVD methods. Interestingly, ultrafine CNTs with diameter below 18 nm catalyzed from Fe/Co nanocrystals well dispersed on rGO surfaces. The as-designed dielectric rGO-CNTs hybrids strongly bonding with magnetic Fe/Co catalyst have the excellent microwave absorption performance. The RL min value of the −37.7 dB at thickness of 1.6 mm is obtained for rGO-CNTs which is better than pure carbon materials. Furthermore, this rGO-CNTs microwave absorbing materials also possess thermal sensitivity effect. The linear fitted relationship of (R-R 0 )/R 0 −temperature is found with the slope of 0.2 %/°C, showing the regular and steady trends. It indicates a highly thermal sensitive feature has great potential for intelligent absorbing materials. This study opens a novel pathway for ultrafine CNTs entangled with graphene enhancing its high-performance microwave absorption coupled with thermal sensitivity effect.
研究领域:
材料科学
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纳米技术
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电磁功能材料
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智能材料
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微波吸收
✓ 已验证
产品关联
DOI
高影响因子
Acta Pharmaceutica Sinica B
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2018
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IF 6.014
Xichuan Tang,Liwei Tan,Kun Shi,Jinrong Peng,Yao Xiao,Wenting Li,Lijuan Chen,Qian Yang,Zhiyong Qian
Enhancing the heat-sensitivity of tumor cells provides an alternative solution to maintaining the therapeutic outcome of photothermal therapy (PTT). In this study, we constructed a therapeutic system, which was composed of methoxy-polyethylene-glycol-coated-gold-nanorods (MPEG-AuNR) and VER-155008-micelles, to evaluate the effect of VER-155008 on the sensitivity of tumor cells to heat, and further investigate the therapeutic outcome of MPEG-AuNR mediated PTT combined with VER-155008- micelles. VER-155008- micelles down-regulate the expression of heat shock proteins and attenuate the heat-resistance of tumor cell. The survival of HCT116 cells treated with VER-155008- micelles under 45 °C is equal to that treated with high temperature hyperthermia (55 °C) in vitro . Furthermore, we proved either the MPEG-AuNR or VER-155008- micelles can be accumulate in the tumor site by photoacoustic imaging and fluorescent imaging. In vivo anti-cancer evaluation showed that tumor size remarkably decreased (smaller than 100 mm 3 or vanished) when treated with combing 45 °C mild PTT system, which contrasted to the tumor size when treated with individual 45 °C mild PTT (around 500 nm 3 ) or normal saline as control (larger than 2000 nm 3 ). These results proved that the VER-155008- micelles can attenuate the heat-resistance of tumor cells and enhance the therapeutic outcome of mild-temperature photothermal therapy.
研究领域:
纳米技术
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癌症治疗
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药学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
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2022
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IF 11.211
Shaoxiong Zhu,Shunni Dong,Wei Fan,Jingjing Nie,Liping Zhu,Binyang Du
The high-performance nanofiltration (NF) membranes were fabricated by using hydrolyzed polyacrylonitrile (HPAN) ultrafiltration (UF) membranes with negatively surface charges as the substrate membranes, quaternized crosslinked microgels (PNI6) with positive charges as the intermediate layer, piperazine (PIP) and trimesoyl chloride (TMC) as the monomers for the formation of polyamide selective layer via interfacial polymerization (IP). The introduction of positively charged PNI6 microgels as the intermediate layer improved the hydrophilicity of resultant NF membranes and rendered the NF membranes with surface positive charges. The obtained NF membranes (MG-NF) with PNI6 microgel interlayer simultaneously achieved excellent water flux and the rejection of salts including Na 2 SO 4 , MgSO 4 , MgCl 2 , and CaCl 2 . Increasing the deposition time of PNI6 microgels on the HPAN UF substrate membranes increased the water flux and rejection of MgCl 2 of the resultant MG-NF series NF membranes. The nanofiltration performance of obtained MG-NF series NF membranes exhibited thermo-sensitivity and long-term stability. For MG-NF-6 NF membrane, the water flux and rejection of MgCl 2 reached 10.1 L·m −2 ·h −1 ·bar −1 and 93.4 % at 25 °C, respectively. With increase of temperature, the water flux of MG-NF-6 membrane was significantly enhanced to be 13.4 L·m −2 ·h −1 ·bar −1 at 45 °C, while the rejection of MgCl 2 slightly decreased to be 90 %.
研究领域:
膜科学
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材料科学
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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）