Ni Ruiyan, Zhang Le, Ma Jiajia, Zhang Jiawen, Xu Xiaoyun, Shi Huan, Deng Qiong, Hu Wenfeng, Hu Jinlian, Ke Qinfei, Zhao Yi
Shanghai Frontiers Science Center of Advanced Textiles, Donghua University, Shanghai 201620, China.
Engineering Research Center of Technical Textiles, Ministry of Education, Donghua University, Shanghai 201620, China.
Nano Lett. 2024 Oct 4. doi: 10.1021/acs.nanolett.4c03276.
Biodegradable shape-memory polymers derived from protein substrates are attractive alternatives with strong potential for valorization, although their reconstruction remains a challenge due to the poor processability and inherent instability. Herein, based on Maillard reaction and immobilization, a feather keratin fibrous adsorbent featuring dual-response shape-memory is fabricated by co-spinning with pullulan, heating, and air-assisted spraying ZIF-8-NH. Maillard reaction between the amino group of keratin and the carbonyl group of pullulan improves the mechanics and thermal performance of the adsorbent. ZIF-8-NH immobilization endows the adsorbent with outstanding multipollutant removal efficiency (over 90%), water stability, and photocatalytic degradation and sterilization performance. Furthermore, the adsorbent can be folded to 1/12 of its original size to save space for transportation and allow for rapid on-demand unfolding (12 s) upon exposure to water and ultraviolet irradiation to facilitate the adsorption and photocatalytic activity with a larger water contact area. This research provides new insight for further applications of keratin-based materials with rapid shape-memory features.
