烟草科技2026，Vol.59Issue(4)：29-39,48,12.DOI:10.16135/j.issn1002-0861.2025.0788
基于聚乳酸协同改性的全生物降解地膜性能分析
Performance of fully biodegradable mulch films based on synergistically modified polylactic acid
摘要
Abstract
To address the issues of poor degradability and residual environmental pollution associated with the conventional polyethylene(PE)mulch films,a series of fully biodegradable mulch films(PLA/OL/LG)were developed via a synergistic modification of a polylactic acid(PLA)matrix using biomass-derived alkali lignin(LG)and glyceryl tripalmitate(OL).The resulting films were systematically characterized for their microstructures,mechanical properties,thermal behaviors,and compost degradation performance to identify the optimal formula.The results showed that the synergistic effects of appropriate amounts of OL and LG significantly enhanced the toughness of PLA,achieving a favorable balance between stiffness and toughness while maintaining good thermal stability and barrier properties.Compost degradation tests revealed that the modified mulch films exhibited a high biodegradation rate,indicating excellent environmental compatibility.Field application trials further revealed that,compared with the traditional PE mulch films(conventional mulch films),the modified PLA biodegradable mulch films displayed good adaptability to tobacco plant growth and exhibited potential in improving the coordination of chemical constituents and intrinsic quality of tobacco leaves.Sensory evaluation results also confirmed that the application of the modified PLA biodegradable mulch films contributed to the maintenance and enhancement of tobacco leaf sensory quality.Economic assessment indicated that the cost of the modified PLA biodegradable mulch films was comparable to that of traditional PE mulch films,demonstrating promising application feasibility.Therefore,the modified PLA fully biodegradable mulch films provide a viable solution for the application of high-performance and environmentally friendly green mulch materials.关键词
烟草/全生物降解地膜/聚乳酸/三棕榈酸甘油酯/碱木质素Key words
Tobacco/Fully biodegradable mulch film/Polylactic acid/Glyceryl tripalmitate/Alkali lignin分类
农业科技引用本文复制引用
张珍珍,刘楠,何声宝,王英元,罗安娜,冯晓民,高成涛,张黎,张威..基于聚乳酸协同改性的全生物降解地膜性能分析[J].烟草科技,2026,59(4):29-39,48,12.基金项目
贵州省科技支撑项目"土壤重金属钝化生物炭可降解地膜制备及应用研究"(黔科合支撑[2024]048). （黔科合支撑[2024]048）
