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用聚二甲基硅氧烷制备的,表面复制有微图形的"弹性印章"直接在聚乙烯,聚丙烯,聚苯乙烯和聚甲基丙烯酸甲酯等热塑性聚合物表面上进行热微模塑,无需复杂设备并可在普通实验室条件下,复制微图形,甚至在小试管外壁的曲面上或在用毛细管形成的微突起表面上也能制备出微曲面图形.讨论了不同聚合物对生成微图形的影响,认为结晶性聚合物以及在温度变化时有较大收缩率的聚合物在微模塑中难以获得清晰图形.无定形聚合物如聚苯乙烯和聚甲基丙烯酸甲酯等能够获得清晰的微结构. 相似文献
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微波固相剥离法制备功能化石墨烯及其电化学电容性能研究(英文) 总被引:2,自引:0,他引:2
通过微波固相剥离氧化石墨制备了功能化石墨烯材料。石墨烯的剥离,是由于微波加热过程中氧化石墨烯片上的官能团分解为CO2和H2O,产生的压力超过了片层间的范德华力。形貌表征显示了石墨烯的有效剥离和纳米孔结构的形成。红外光谱分析结果表明微波剥离的功能化石墨烯仍然有少量的官能团残留。N2等温吸附-脱附测试结果表明样品具有高比表面积(412.9m2·g-1)和大孔容(1.91cm3·g-1)。电化学测试结果表明功能化石墨烯具有良好的电化学电容行为和207.5F·g-1的比电容。 相似文献
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以聚二甲基硅氧烷为弹性印章,低密度聚乙烯为材料,在平面、一般曲面乃至毛细管的微突起上微模塑出了清晰的微条纹。 相似文献
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Transparent, flexible electronic skin holds a wide range of applications in robotics, humanmachine interfaces, artificial intelligence, prosthetics, and health monitoring. Silver nanowire are mechanically flexible and robust, which exhibit great potential in transparent and electricconducting thin film. Herein, we report on a silver-nanowire spray-coating and electrodemicrostructure replicating strategy to construct a transparent, flexible, and sensitive electronic skin device. The electronic skin device shows highly sensitive piezo-capacitance response to pressure. It is found that micropatterning the surface of dielectric layer polyurethane elastomer by replicating from microstructures of natural-existing surfaces such as lotus leaf, silk, and frosted glass can greatly enhance the piezo-capacitance performance of the device. The microstructured pressure sensors based on silver nanowire exhibit good transparency, excellent flexibility, wide pressure detection range (0-150 kPa), and high sensitivity (1.28 kPa-1). 相似文献