生物质化学工程2025，Vol.59Issue(6)：29-36,8.DOI:10.3969/j.issn.1673-5854.2025.06.004
聚乳酸/核桃壳复合材料的制备与性能研究
Preparation and Properties of Polylactic Acid/Walnut Shell Composites
刘嘉晋 1欧文祥 1曾建兵 1李以东1
作者信息
- 1. 西南大学化学化工学院,重庆 400715
- 折叠
摘要
Abstract
In order to enhance the interaction between polylactic acid(PLA)and walnut shell powder(WSP)as well as prepare low-cost,and high-performance PLA/WSP composites,the prepolymer(SEP)prepared by the reaction of sebacic acid and epoxidized soybean oil was used as compatibilizer and toughening agent.The PLA/WSP composites were prepared by melt blending with PLA,SEP.The effects of SEP content on the interfacial interaction,rheological properties,thermal properties and mechanical properties of PLA/WSP composites were investigated.Theoretical calculations and rheological study indicated that the interfacial interaction between PLA and WSP gradually increased with the increasing SEP content.Differential scanning calorimetry(DSC)results showed that SEP had a certain plasticizing effect on PLA.Furthermore,the increased SEP content promoted the interfacial interaction between PLA and WSP,hindered the chain segment movement of PLA and reduced the crystallization of PLA/WSP composites.The improved compatibility between PLA and WSP significantly enhanced the elongation at break and impact strength of the composites.When the amount of SEP was 5％,the elongation values at break and impact strength of PLA/WSP composite(P8W2S5)were 23.8％and 39.7 J/m,respectively,which were 543.2％and 24.1％higher than those of PLA/WSP composite without SEP(P8 W2 S0).The glass transition temperature and melting enthalpy of P8W2S5 were 60.7 ℃ and 29.06 J/g,respectively,which were 1.1℃ and 1.7 J/g lower than those of P8W2S0.关键词
聚乳酸/核桃壳/环氧大豆油/增容/增韧Key words
polylactic acid/walnut shell powder/epoxidized soybean oil/compatibilization/toughening分类
化学化工引用本文复制引用
刘嘉晋,欧文祥,曾建兵,李以东..聚乳酸/核桃壳复合材料的制备与性能研究[J].生物质化学工程,2025,59(6):29-36,8.
