▎ 摘　　要

In this study, the ionic liquid (IL) modified shear exfoliation graphene (SEG)/co-polyamide (IL-SEG/CO-PA) nanocomposites were fabricated by an effective and simple solution mixing method. In detail, SEG was fabricated in aqueous phase and then modified by IL, 1-butyl-3-methylimidazolium chloride (BMIMCL) to enhance its dispersion in CO-PA matrix. The IL-SEG/CO-PA nanocomposites were of good properties, such as thermal property, electrical conductivity and mechanical properties, especially a low percolation threshold of not higher than 0.15 wt% (about 0.0523 vol%). The tests and measurements indicated that the Tc, T-50%, and Td-max of the nanocomposites was 17 degrees C, 18 degrees C, and 22.5 degrees C higher than that of CO-PA respectively; when SEG content was 0.75 wt%, the electrical conductivity was improved from 2.85 x 10(-12) S/m to 1.32 x 10(-7) S/m, the tensile strength increased by 43.2%, and yield strength 19.7%. The incorporation of IL resulted in the good exfoliation and dispersion of graphene in CO-PA matrix, which could be the direct reason for the improvement of the nanocomposites. (C) 2016 Society of Plastics Engineers