日用化学工业（中英文）2026，Vol.56Issue(1)：88-97,10.DOI:10.3969/j.issn.2097-2806.2026.01.011
PLA生物降解聚酯材料的制备及降解性能的研究
Study on the preparation and degradability of PLA biodegradable polyester material
摘要
Abstract
Nanocellulose(CNC)was carboxylated and then introduced into polylactic acid(PLA)matrix.The effects of carboxylated nanocellulose(CNC-C)and CNC-C doping amount on the mechanical properties,phase structure,crystallinity and degradation properties of CNC-PLA composite polyester were studied.The results showed that,the hydrophilicity of CNC was improved after carboxylation,whose water contact angle was decreased from 73.5° to 46.4°.The infrared spectrum showed that CNC-C and PLA formed composite films by physical blending.The addition of CNC-C made the fracture mode of the composite films change from brittle fracture to ductile fracture.The tensile strength and fracture elongation of 3%CNC-C/PLA composite film both reached the maximum values of 40.8 MPa and 5.5%,and the cold crystallization temperature(Tc)of this composite film was of the minimum value(114.5℃),and its crystallinity reached the maximum value of 50.6%.The CNC-C introduced improved the degradability of the composite film.The weight loss of 3%CNC-C/PLA composite film was 1.71%after degradation at 25℃for one week,and it was 53.5%after degradation at 100℃for one week,indicative of excellent biodegradability and mechanical properties.关键词
聚乳酸/纳米纤维素/羧基化/复合薄膜/生物降解/结晶度Key words
polylactic acid/nanocellulose/carboxylation/composite film/biodegradation/crystallinity分类
通用工业技术引用本文复制引用
毛淑佳..PLA生物降解聚酯材料的制备及降解性能的研究[J].日用化学工业（中英文）,2026,56(1):88-97,10.基金项目
广西高等教育本科教学改革工程项目一般A类项目(2025JGA406) （2025JGA406）
