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arXiv 0905.2779cond-mat.softcond-mat.mes-hallcond-mat.mtrl-sci
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碳纳米管分散液晶复合材料的各向同性向列相变

Isotropic to Nematic Phase Transition in Carbon Nanotube dispersed Liquid Crystal Composites

Rajratan Basu, Krishna P. Sigdel, Germano S. Iannacchione

摘要:

报道了碳纳米管(CNT)分散的液晶(LC)功能复合材料的各向同性(I)到各向同性(N)相变随CNT浓度变化的高分辨率介电和量热研究。相干监测的I-N相变的演变,由分散的碳纳米管在LC介质中形成的局域有序的温度依赖性和转变焓。各向异性的碳纳米管在液晶介质中诱导液晶指向矢发生局部形变,形成溶致的伪液晶相。结果清楚地表明分散的CNT对复合材料的各向同性相和双相的显著影响。

英文摘要:

A high-resolution dielectric and calorimetric study of the isotropic (I) to nematic (N) phase transition of carbon nanotube (CNT) dispersed liquid crystal (LC) functional composites as a function of CNT concentration is reported. The evolution of the I-N phase transition, the temperature dependence of local nematic ordering formed by dispersed CNTs in the LC media and the transition enthalpy were coherently monitored. Anisotropic CNTs induce local deformation to the nematic director of LC and form lyotropic pseudo-nematic phase in the LC media. Results clearly indicate the dramatic impact of dispersed CNTs on both the isotropic and nematic phases of the composite.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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