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Influence of rigid segment content on the piezoresistive behavior of multiwall carbon nanotube/segmented polyurethane composites

机译:刚性段内容对多壁碳纳米管/分段聚氨酯复合材料压阻性行为的影响

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摘要

Tensile piezoresistive properties of multiwall carbon nanotube (MWCNT)/segmented polyurethane (SPU) composites comprising 15, 30, and 50 wt % rigid segment (RS) contents and 2, 4, and 6 wt % MWCNT contents are investigated. The physicochemical properties of such composites are used to better understand their mechanical and piezoresistive behavior. Infrared spectra shows that for 15 and 30 wt % RS composites the addition of MWCNTs promotes a more structured RS domain which increases the phase separation, while for 50 wt % RS composites the MWCNTs disrupt the RS domains of the polymer with a high phase separation. Overall, MWCNT content has less effect on the phase separation than RS content. The composites with 6 wt % MWCNT content reached electrical conductivities of the order of approximate to 10(-1) S/m using 15 and 50 wt % RS polymers. Upon deformation, composites with 15 wt % RS and 4 wt % MWCNT achieved changes in electrical resistance of the order of 5000 times their unstrained value, which are outstanding values that can be exploited for applications such as human motion detection. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44448.
机译:研究了包含15,30和50wt%刚性段(RS)含量和2,4和6wt%MWCNT内容的多壁碳纳米管(MWCNT)/分段聚氨酯(SPU)复合材料的拉伸压阻性。这种复合材料的物理化学性质用于更好地理解其机械和压阻性行为。红外光谱表明,对于15和30wt%的RS复合材料,MWCNT的添加促进了更多结构化的RS结构域,其增加了相分离,而对于50wt%RS复合材料,MWCNT通过高相分离破坏聚合物的RS结构域。总体而言,MWCNT内容对相位分离的效果少于RS内容。具有6wt%MWCNT含量的复合材料达到了使用15和50wt%RS聚合物的近似为10(-1)S / m的电导率。在变形时,具有15wt%Rs的复合材料和4wt%MWCNT的电阻变化为5000倍的电阻5000倍,这是可以利用人员运动检测的应用的优异值。 (c)2016 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2017,134,44448。

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