Preparation and characterization of SDBS modified carbon nanotubes and poly (L-lacitde) composite reinforced by the SDBS/carbon nanotubes

The surface of carbon nanotubes (multi-walled carbon nanotubes as used, MWCNTs) were modified by sodium lauryl benzenesulfate (SDBS) and the composites combined with poly (L-lacitde) (PLLA) and modified MWCNTs as reinforcing fillers were fabricated by the solution casting method. The morphologies and structures of the modified MWCNTs were studied by FT-IR and SEM. The chain structure, aggregation structure and the mechanical properties of the composites are analyzed by FT-IR, PM and tensile testing. The SDBS layers improve the dispersion of MWCNTs in organic solvent and PLLA matrix and strengthen the interfacial adhesion between MWCNTs and PLLA, resulting the tensile strength of SDBS/MWCNTs/PLLA composites increased.