乙二醇修饰生物炭负载MMA对PLA结构和性能的影响  

Effect of Ethylene Glycol Modified Biochar Loaded with MMA on the Structures and Properties of PLA

作　　者：魏满奇 李清波[1] 陈福诚 吕崇源 任婉宁 WEI Manqi;LI Qingbo;CHEN Fucheng;LYU Chongyuan;REN Wanning(Green Shipping and Carbon Neutrality Laboratory,School of Environmental Science and Engineering,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学环境科学与工程学院绿色航运与碳中和实验室,辽宁大连116026

出　　处：《塑料工业》2025年第2期154-160,168,共8页China Plastics Industry

基　　金：国家自然科学基金(42277410);大连海事大学中央高校基本科研业务费专项资金(3132023520)。

摘　　要：使用生物炭提高聚乳酸(PLA)性能在绿色材料开发领域极具发展潜力。本研究使用乙二醇对樟子松炭(PS)进行表面修饰后与甲基丙烯酸甲酯(MMA)一起进行自由基聚合反应,合成了生物炭基增强剂(OHP),并研究了OHP对PLA结构和性能的影响机理。研究发现,OHP中MMA单元改善了PS和PLA的界面缺陷。OHP和PLA通过形成偶极—偶极力和分子链缠结,有效阻碍了PLA分子链在受热时发生松弛和运动,提高了PLA的力学性能和热稳定性。通过差示扫描量热法(DSC)研究发现,在OHP异相结晶和分子间吸引力的共同作用下,提升了PLA的结晶潜力和结晶动力,提高了PLA的结晶度。该方法也为绿色材料的合成优化和性能提升提供了参考。The use of biochar to improve the properties of polylactic acid(PLA)has great potentials in the field of green material developments.In this study,the surface modification of camphorated pine char(PS)was carried out by ethylene glycol.The biocharbased enhancer(OHP)was synthesized via the free radical polymerization reaction between the modified PS and methyl methacrylate(MMA).The effects of OHP on the structures and properties of PLA were investigated.The results show that the MMA units in OHP improve the interfacial defects between PS and PLA.When heated,the OHP and PLA effectively hinder the relaxation and movement of PLA molecular chains through the formations of dipole-dipole forces and molecular chain entanglements,improving the mechanical properties and thermal stability of PLA.The differential scanning calorimetry(DSC)results show that the crystallization potential and crystallization kinetics of PLA are enhanced via the combined effects of OHP heterogeneous crystallization and intermolecular attractions,improving the crystallinity of PLA.This method also provides references for the synthesis optimization and performance enhancements of green materials.

关 键 词：生物炭 聚乳酸 热稳定性 甲基丙烯酸甲酯 生物炭基增强剂 

分 类 号：TQ321.2[化学工程—合成树脂塑料工业]