聚乳酸柔性定形相变薄膜的制备及性能研究
Preparation and Properties of Poly(Lactic Acid)Flexible Shaped Phase Change Films
吴学红 1栾林林 1赵敏 1陈亚南 1吕财 1刘勇 1常志娟 1李文浩1
作者信息
摘要
为解决相变材料易泄漏和力学性能差的问题,以聚乳酸(PLA)为基底,聚乙二醇(PEG)为相变工质,制备PEG/PLA相变薄膜.对其热性能和力学性能进行测试,结果表明,PLA作为支撑基底有效防止了 PEG液体的泄漏.PEG/PLA配比为180/100时,相对焓效率最高,达到103.87％,其熔融和凝固过程中的潜热分别为128.5 J·g-1和120.2 J·g-1.随着PEG比例的增加,薄膜的杨氏模量逐渐减小,PEG/PLA配比为180/100时,杨氏模量为152.2 MPa,比纯PLA降低了 73.2％,薄膜的柔韧性得到提升.
Abstract
To solve the problems of easy leakage and poor mechanical properties of phase change materials,this paper prepared PEG/PLA phase change films with poly(lactic acid)(PLA)as the substrate and poly(ethylene glycol)(PEG)as the phase change agent.The thermal and mechanical properties were tested,and the results showed that PLA as a supporting substrate effectively pre-vented the leakage of PEG liquid.the highest relative enthalpy efficiency of 103.87％was achieved at the PEG/PLA ratio of 180/100,and the latent heats of melting and solidification were 128.5 J·g-1 and 120.2 J·g-1,respectively.with the increase of PEG ratio,the film Young's modulus gradually decreased with the increase of PEG ratio,and the Young's modulus was 152.2 MPa at the PEG/PLA ratio of 180/100,which was 73.2％lower than that of pure PLA,and the flexibility of the film was improved.
关键词
柔性相变薄膜/聚乳酸/热性能/力学性能Key words
flexible phase change film/polylactic acid/thermal properties/mechanical property引用本文复制引用
基金项目
国家自然科学基金(51476149)
河南省中原科技创新领军人才项目(234200510011)
河南省科技攻关计划(232102321089)
郑州市协同创新专项校重大重点培育项目(2021ZDPY0107)
出版年
2024
NETL
NSTL
万方数据