Sustainable, thermoplastic and hydrophobic coating from natural cellulose and cinnamon to fabricate eco-friendly catering packaging  

作　　者：Rumeng Xu Chunchun Yin Jingxuan You Jinming Zhang Qinyong Mi Jin Wu Jun Zhang 

机构地区：[1]CAS Key Laboratory of Engineering Plastics,Institute of Chemistry,Chinese Academy of Sciences(CAS),Beijing,100190,China [2]University of Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Green Energy & Environment》2024年第5期927-936,共10页绿色能源与环境（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52173292);the National Key Research and Development Project of China(No.2020YFC1910303);the Youth Innovation Promotion Association CAS(No.2018040).

摘　　要：Non-degradable polymers cause serious environmental pollution problem,such as the widely-used while unrecyclable coatings which significantly affect the overall degradation performance of products.It is imperative and attractive to develop biodegradable functional coatings.Herein,we proposed a novel strategy to successfully prepare biodegradable,thermoplastic and hydrophobic coatings with high transparence and biosafety by weakening the interchain interactions between cellulose chain.The natural cellulose and cinnamic acid were as raw materials.Via reducing the degree of polymerization(DP)of cellulose and regulating the degree of substitution(DS)of cinnamate moiety,the obtained cellulose cinnamate(CC)exhibited not only the thermalflow behavior but also good biodegradability,which solves the conflict between the thermoplasticity and biodegradability in cellulose-based materials.The glass transition temperature(T_(g))and thermalflow temperature(T_(f))of the CC could be adjusted in a range of 150–200℃ and 180–210℃,respectively.The CC with DS<1.2 and DP≤100 degraded more than 60%after an enzyme treatment for 7 days,and degraded more than 80%after a composting treatment for 42 days.Furthermore,CC had no toxicity to human epidermal cells even at a high concentration(0.5 mg mL^(-1)).In addition,CC could be easily fabricated into multifunctional coating with high hydrophobicity,thermal adhesion and high transparence.Therefore,after combining with cellophane and paperboard,CC coating with low DP and DS could be used to prepare fully-biodegradable heat-sealing packaging,art paper,paper cups,paper straws and food packaging boxes.

关 键 词：Thermoplastic coating Bio-degradable adhesive Natural products Cellulose Eco-friendly packaging 

分 类 号：TQ342[化学工程—化纤工业]