Mechanically Robust and Degradable Poly(urethane-urea) Plastics Derived from Tannic Acid and Castor Oil for Enhanced Fruit Preservation  

作　　者：Hong-Yu Pan Xu Fang Yi-Xuan Li Si-Heng Li Xiang Li Jun-Qi Sun 

机构地区：[1]State Key Laboratory of Supramolecular Structure and Materials,College of Chemistry,Jilin University,Changchun 130012,China

出　　处：《Chinese Journal of Polymer Science》2025年第3期447-456,共10页高分子科学(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.21935004 and 22350011)。

摘　　要：Traditional packaging plastics derived from fossil fuels for perishable foods have caused severe environmental pollution and resource depletion.To promote sustainable development and reduce wastage of perishable products,there is a significant challenge in developing biobased packaging plastics that offer excellent preservation,satisfactory mechanical performance,and inherent degradability.In this study,poly(urethane-urea)(PUU)plastics are fabricated using a one-pot polyaddition reaction involving castor oil(CO),tannic acid(TA),lysine-derived ethyl 2,6-diisocyanatohexanoate(LDI),and H2O.The resulting PUU plastics demonstrate a high breaking strength of about 32.7 MPa and a strain at break of ca.102%.Due to the reversibility of hydrogen bonds,PUU plastics can be easily shaped into various forms.They are non-cytotoxic and suitable for food packaging.With a high TA content of ca.38.2 wt%,PUU plastics exhibit excellent antioxidant capacity.Consequently,PUU plastics show outstanding freshness preservation performance,extending the shelf life of cherry tomatoes and winter jujubes for at least 8 days at room temperature.Importantly,PUU plastics can autonomously degrade into non-toxic substances within ca.298 days when buried in soil.

关 键 词：Bio-based plastics Degradable plastics Food packaging plastics Materials science 

分 类 号：TQ3[化学工程]