具有压力传感性能的碳纳米管接枝亚麻织物

Carbon nanotubes grafted to linen fabric with pressure sensing properties

摘要:

通过马来酸酐（MAH）与亚麻纤维（LF）C6-OH发生酯化反应制得含有羧基的LF（LF-g-MAH），再与羟基化多壁碳纳米管（MWCNTs-OH）的羟基再次发生酯化反应，将碳纳米管（CNTs）化学接枝到LF上制得具有导电性能和压力传感性能的LF（LF-g-MAH-MWCNTs）。用FTIR和EDX分析证实了接枝的成功，分别用XRD、SEM、LOI和应力-应变曲线研究了接枝CNTs后对LF的结晶性能、表面性能、燃烧性能以及拉伸性能的影响，测试了接枝碳纳米管后LF的导电性和压力传感性。结果发现，接枝碳纳米管对LF结晶性能、表面形态、燃烧性能以及力学性能均没有明显影响，却使不导电的LF具有导电性和稳定灵敏的压力传感性能，手指按压即能产生1.0~1.5 kΩ的电阻变化，体重分别60 kg和80 kg的测试者踩压能产生10~70 kΩ的电阻变化。

Abstract:

By esterification of maleic anhydride (MAH) with flax fiber (LF) C6-OH, LF (LF-g-MAH) containing carboxyl group was prepared and the carboxyl group esterified again with the hydroxyl of hydroxylated multi-wall carbon nanotubes (MWCNT-OH) get the carbon nanotubes (CNTs) chemically grafted LF (LF-g-MAH-MWCNTs) with electrical conductivity and pressure sensing properties. The successful grafting was confirmed by FTIR and EDX. The effects of the grafted carbon nanotubes on the crystallization properties, surface properties, combustion properties and mechanical properties of LFs were studied by XRD, SEM, LOI and stress-strain curves, respectively. The electrical conductivity and pressure sensitivity of the LFs grafted carbon nanotubes were tested. The results show that the grafted carbon nanotubes have no obvious effect on the crystallization properties, surface morphology, combustion properties and mechanical properties of LFs, but making the non-conductive LFs have electrical conductivity and stable and sensitive pressure sensing properties. The pressure sensor can generate a resistance change of 1.0~1.5 kΩ pressed by index finger or generate a resistance change of 10~70 kΩ stepped on by a subject weighing 60 kg to 80 kg.