四羟甲基氯化磷交联废弃皮明胶制备可生物降解薄膜  

Biodegradable Film Fabricated Using Waste Leather Gelatin Cross-linked by Tetrakis Hydroxymethyl Phosphonium Chloride

作　　者：马晓英 韩建林 陈学军 陈良 强涛涛 MA Xiaoying;HAN Jianlin;CHEN Xuejun;CHEN Liang;QIANG Taotao(Glorious Sun Guangdong School of Fashion,Huizhou University,Huizhou 516007,China;College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China)

机构地区：[1]惠州学院旭日广东服装学院,广东惠州516000 [2]陕西科技大学轻工科学与工程学院,陕西西安710021

出　　处：《皮革科学与工程》2021年第5期12-19,共8页Leather Science and Engineering

基　　金：国家级大学生创新创业训练计划项目(202010577010)。

摘　　要：传统不可降解塑料薄膜废弃后产生的微塑料对生态环境带来了严重的威胁,随着我国禁塑令的逐步推行,可生物降解的替代品已然成为研究和发展的重点。本文利用工业级废弃皮明胶作为廉价的原材料通过四羟甲基氯化磷(THPC)作为交联剂对其进行交联改性处理,得到一种新颖的高强度明胶基可生物降解薄膜。由于THPC在明胶分子链之间形成的共价交联网络和大量氢键的存在,THPC交联明胶所成薄膜的力学性能得到了显著的提升。THPC交联改性后的明胶所成薄膜的断裂应力最高可达(29.20±3.86)MPa,断裂应变最高可以达到(2.68±0.26)mm/mm,在水溶液中浸泡48 h后仍然能够保持良好的物理形态,且拥有良好的透光率(最高可达92.3%)和良好的生物降解性。考虑到该薄膜的综合性能,其在包装和农用薄膜方面具有良好的应用潜力,有望替代传统石油基不可降解塑料薄膜,从源头消除微塑料对环境造成的负面影响。The microplastics resulted from the discarded traditional non-degradable plastic filmhas brought a serious threat to ecology.With the gradual implementation of restricting plastic order in China,biodegradable substitutes have become the focus of research and development.In this paper,we used industrial waste gelatin as a cheap raw material and tetrakis hydroxymethyl phosphonium chloride(THPC)as a cross-linking agent to fabricate a novel high strength gelatin-based biodegradable film.Due to the existence of covalent cross-linking network and hydrogen bonds among the gelatin chains in the cross-linked gelatin films,the mechanical properties of the cross-linked gelatin films were remarkably improved.The obtained film exhibited ahighest fracture stress of(29.20±3.86)MPa,and a maximum fracture strain of(2.68±0.26)mm/mm.The film can maintain good physical morphology after 48 h of immersion in water,meanwhile,it has good light transmittance(reached a maximum value of 92.3%)and excellent biodegradability.Considering the comprehensive properties of the film,it has good application potential in packaging and agricultural film.It is expected to be used to replace the traditional petroleum-based non-degradable plastic film and eliminate the negative impact of microplastics on the environment from the source.

关 键 词：废弃皮明胶 四羟甲基氯化磷 可生物降解薄膜 

分 类 号：TS513[轻工技术与工程—皮革化学与工程]