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Updated: Dec 31, 2025
Generation of Scalable, Metallic High-Aspect Ratio Nanocomposites in a Biological Liquid Medium
Published on: July 8, 2015
Light-induced shape-memory polyurethane composite film containing copper sulfide nanoparticles and modified cellulose
Ming Li1, Shiyu Fu1, Altaf Halim Basta2
1State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Abstract:
Light-induced shape-memory polymer (LSMP) materials have advantages of remote control and precise stimulation under suitable photoactive factors. The excellent performance, stability, and low cost are significant for LSMP materials. Herein, a novel stable and cheap LSMP was prepared with polyurethane (PU) and copper sulfide nanoparticles (CuS NPs) supported on modified cellulose nanocrystals (MCNC) (CuS NPs@MCNC). For the photosensitivity, CuS NPs were formed and assembled on MCNC without other additives. These prepared LSMP films exhibited good light-induced shape memory, which was ascribed to the highly photothermal effect of CuS NPs. We found that the shape recovery ratio was 97.4 % when the PU nanocomposite film containing 0.2 wt.% CuS NPs@MCNC was irradiated by near-infrared (NIR) for 21 s. The ratio was still over 85.7 % after five times of repeat test. These LSMPs contained CuS NPs@MCNC have potential to be applied as a prospective material for medical devices and new packaging.
