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部分解缠结聚苯乙烯在纳米孔道中的受限流动行为研究
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作者 吴茗 尹相斐 +4 位作者 王晓亮 周东山 高云 薛奇 韩江龙 《中国科学:化学》 CAS CSCD 北大核心 2023年第4期768-777,共10页
高分子的长链特征使其对纳米到微米尺度的空间受限非常敏感,也是当前微电子电路、微器件传感器等领域材料制造及其工艺研发中的关键之一.本工作从不同缠结程度的窄分布聚苯乙烯出发,以不同孔径的阳极氧化铝模板为二维受限空间,研究了高... 高分子的长链特征使其对纳米到微米尺度的空间受限非常敏感,也是当前微电子电路、微器件传感器等领域材料制造及其工艺研发中的关键之一.本工作从不同缠结程度的窄分布聚苯乙烯出发,以不同孔径的阳极氧化铝模板为二维受限空间,研究了高分子熔体在其中的纳米受限流动行为.我们发现,缠结程度低的聚苯乙烯在受限流动初期显著快于本体,后因缠结恢复逐渐降至与本体相当,缠结恢复时间尺度与宏观流变实验获得的缠结恢复时间处于同一个数量级.我们认为缠结程度降低后流动的加速来源于受限状态时在压力梯度推动下高分子链通过蛇行进入孔道的速率加快;同时受限链段由于非平衡构象增多而重排更加频繁,导致强受限程度下部分解缠结样品的缠结恢复加快.本文希望通过对链缠结在高分子链进入受限空间中作用的探索,为受限态高分子复合材料的加工工艺提供新的理解. 展开更多
关键词 二维受限 聚苯乙烯 解缠结 纳米孔 AAO
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A Printable and Conductive Yield-Stress Fluid as an Ultrastretchable Transparent Conductor
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作者 Qianying Lu Yunlei Zhou +3 位作者 xiangfei yin Shitai Cao Xiaoliang Wang Desheng Kong 《Research》 SCIE EI CAS CSCD 2021年第1期1554-1564,共11页
In contrast to ionically conductive liquids and gels,a new type of yield-stress fluid featuring reversible transitions between solid and liquid states is introduced in this study as a printable,ultrastretchable,and tr... In contrast to ionically conductive liquids and gels,a new type of yield-stress fluid featuring reversible transitions between solid and liquid states is introduced in this study as a printable,ultrastretchable,and transparent conductor.The fluid is formulated by dispersing silica nanoparticles into the concentrated aqueous electrolyte.The as-printed features show solid-state appearances to allow facile encapsulation with elastomers.The transition into liquid-like behavior upon tensile deformations is the enabler for ultrahigh stretchability up to the fracture strain of the elastomer.Successful integrations of yield-stress fluid electrodes in highly stretchable strain sensors and light-emitting devices illustrate the practical suitability.The yield-stress fluid represents an attractive building block for stretchable electronic devices and systems in terms of giant deformability,high ionic conductivity,excellent optical transmittance,and compatibility with various elastomers. 展开更多
关键词 ATTRACTIVE ELECTROLYTE REVERSIBLE
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A Printable and Conductive Yield-Stress Fluid as an Ultrastretchable Transparent Conductor
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作者 Qianying Lu Yunlei Zhou +3 位作者 xiangfei yin Shitai Cao Xiaoliang Wang Desheng Kong 《Research》 EI CAS CSCD 2022年第1期361-371,共11页
In contrast to ionically conductive liquids and gels,a new type of yield-stress fluid featuring reversible transitions between solid and liquid states is introduced in this study as a printable,ultrastretchable,and tr... In contrast to ionically conductive liquids and gels,a new type of yield-stress fluid featuring reversible transitions between solid and liquid states is introduced in this study as a printable,ultrastretchable,and transparent conductor.The fluid is formulated by dispersing silica nanoparticles into the concentrated aqueous electrolyte.The as-printed features show solid-state appearances to allow facile encapsulation with elastomers.The transition into liquid-like behavior upon tensile deformations is the enabler for ultrahigh stretchability up to the fracture strain of the elastomer.Successful integrations of yield-stress fluid electrodes in highly stretchable strain sensors and light-emitting devices illustrate the practical suitability.The yield-stress fluid represents an attractive building block for stretchable electronic devices and systems in terms of giant deformability,high ionic conductivity,excellent optical transmittance,and compatibility with various elastomers. 展开更多
关键词 ATTRACTIVE ELECTROLYTE REVERSIBLE
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