Affiliation:
1. National Local Joint Laboratory for Advanced Textile Processing and Clean Production Wuhan Textile University Wuhan 430200 China
2. CAS Key Laboratory of Engineering Plastics Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 China
3. Research Centre of Textiles for Future Fashion School of Fashion and Textiles The Hong Kong Polytechnic University Hong Kong 999077 China
Abstract
AbstractSilk fibroin (SF) is a natural biomaterial from silk, which has outstanding biocompatibility. However, regeneration SF materials usually suffer from brittleness, which restricts their applications. Here, a novel supramolecular co‐assembly strategy is reported for the preparation of a Bolas‐shaped polyethylene glycol peptide (BPP)/SF film, where the peptide and SF form a robust payload co‐assembled network and polyethylene glycol (PEG) fragments form supramolecular cross‐linking in this network. The obtained BPP/SF film shows both high stress (27.8 MPa), high toughness (3.64 MJ m−3), high transparency (89%), and high mid‐infrared (MIR) emissivity (90.5%). In passive radiative cooling, the BPP/SF film results in a 2.7 °C reduction in the temperature of the human arm skin and a 14.6 °C reduction in the temperature of the solar cell. More importantly, this novel BPP co‐assembly SF material can be recycled and reused while maintaining its original mechanical strength. This work provides a novel strategy for fabricating regenerative SF materials with ultra‐strong and ultra‐tough mechanical performance.
Funder
National Natural Science Foundation of China