塑料科技2025，Vol.53Issue(12)：159-163,5.DOI:10.15925/j.cnki.issn1005-3360.2025.12.029
聚乳酸基木塑复合材料在不同浓度碱性溶液中的降解
Degradation of Polylactic Acid Based Wood Plastic Composites in Alkaline Solutions with Different Concentrations
摘要
Abstract
The study used polylactic acid(PLA)as the matrix material and wood flour(WF)as the reinforcing material to prepare PLA based wood plastic composites(WF/PLA)through the melt blending extrusion process.The degradation behavior of the composite in sodium hydroxide solutions of different concentrations(0.03,0.05,0.10,0.20,0.50 mol/L)was investigated,and the degradation behavior was assessed by characterization using gel permeation chromatography,Fourier-transform infrared spectroscopy and Raman spectroscopy.The results showed that the composite underwent surface erosion degradation in alkaline solutions.After degradation,the surface of the composite severely faded,its volume decreased,and its molecular weight dropped.Moreover,the higher the concentration of the alkaline solution,the faster the degradation.In the 0.50 mol/L solution,the degradation rate reached 82.34%after 1 w of degradation.After degradation,the FTIR and Raman spectra of the material surface showed significant changes in peak intensity.As the degradation time continued to extend,the intensity of the characteristic peaks gradually increased,and the higher the concentration of the alkaline solution,the greater the intensity of the characteristic peaks.关键词
聚乳酸/木粉/复合材料/水解降解/碱性溶液Key words
PLA/Wood flour/Composites/Hydrolysis degradation/Alkaline solution分类
通用工业技术引用本文复制引用
张小青,张腾,郑素枚,李琳..聚乳酸基木塑复合材料在不同浓度碱性溶液中的降解[J].塑料科技,2025,53(12):159-163,5.基金项目
2022年度福建省中青年教师教育科研项目(科技类)(JAT220461) （科技类）
