The alignment of SWNTs in polymer by repeated stretching method
The SWNTs/PMMA composite with good alignment, uniformity and dispersion of SWNTs were fabricated by in situ polymerization and using repeated mechanical stretching method. The semidried mixture was stretched along one direction repeatedly to align SWNTs in the composite matrix. The SEM and the TEM micrograph demonstrated that SWNTs were aligned in the stretching direction and well dispersed in the matrix. Polarized Raman spectra with various incidence angles indicated that SWNTs had a good alignment in the composite. The composite presented distinct anisotropic electrical and mechanical properties. The SWNTs/PMMA composite presented higher electrical conductivity and the mechanical properties along the stretching direction than vertical to it. The dynamic model of SWNTs realigning in the stretching process was established in this paper to explain the mechanism of the SWNTs orientation along stretching direction under action of stream shear stress in matrix.
SWNTs stretching method alignment PMMA
戴剑锋 姚东 王青 李维学 张超
兰州理工大学理学院,甘肃兰州 730050;兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州 730050 兰州理工大学理学院,甘肃兰州 730050
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）