中国塑料 ›› 2025, Vol. 39 ›› Issue (9): 38-43.DOI: 10.19491/j.issn.1001-9278.2025.09.006

• 材料与性能 • 上一篇    下一篇

环氧大豆油/桐油酸酐协同增韧聚乳酸⁃木质素复合材料

林明华1, 王华1, 郭建兵1,2(), 郑斌1, 王瑶1   

  1. 1.康命源(贵州)科技发展有限公司,贵州 安顺 561100
    2.贵州省材料产业技术研究院,贵阳 550014
  • 收稿日期:2024-09-09 出版日期:2025-09-26 发布日期:2025-09-22
  • 通讯作者: 郭建兵,博士,研究员,硕士生/博士生导师,研究方向为高性能复合材料研究及应用,guojianbing_1015@163.com
    郑斌,本科,工程师,研究方向为聚合物共混改性
    E-mail:guojianbing_1015@163.com
  • 基金资助:
    贵州省科技计划项目(黔科合平台人才?ZZSG[2024]015、黔科合中引地项目[2024]020)

Polylactic⁃lignin composites synergistically toughened with epoxy soybean oil and tung oleic anhydride

LIN Minghua1, WANG Hua1, GUO Jianbing1,2(), ZHENG Bin1, WANG Yao1   

  1. 1.Kangmingyuan (Guizhou) Technology Development Co,Ltd,Anshun 561100,China
    2.Guizhou Institute of Materials Industry Technology,Guiyang 550014,China
  • Received:2024-09-09 Online:2025-09-26 Published:2025-09-22
  • Contact: GUO Jianbing, ZHENG Bin E-mail:guojianbing_1015@163.com

摘要:

制备了不同比例的环氧大豆油(ESO)/桐油酸酐(TOA)凝胶,研究其对聚乳酸(PLA)/木质素(LM)复合材料性能的影响。通过扫描电子显微镜、动态力学分析、热重分析和旋转流变仪等方法探究了复合材料力学性能、结晶行为、动态机械性能及热稳定性的变化。结果表明,ESO/TOA凝胶能较好地分散在基体PLA中,凝胶、PLA与木质素三者发生反应提高相容性,使得复合材料韧性提高;ESO/TOA凝胶的加入促进分子链的活动,提高了复合材料的结晶度;但会降低复合材料的热稳定性;断裂伸长率随着TOA含量的增加而增加,从纯PLA的6 %提高到32 %左右;ESO∶TOA为5∶5时,凝胶粒子在基体中分散最佳,综合性能较好,冲击强度达到4.1 kJ/m2

关键词: 聚乳酸, 环氧大豆油, 桐油酸酐, 木质素, 力学性能

Abstract:

In the present study, the effects of varying proportions of epoxy soybean oil (ESO)/tung oleic anhydride (TOA) gel on the properties of polylactic acid (PLA)/lignin (LM) composites were investigated. The mechanical properties, crystallization behavior, dynamic mechanical performance, and thermal stability of the composites were characterized using scanning electron microscopy, dynamic mechanical analysis, thermogravimetric analysis, and rotational rheometry. The results indicated that the ESO/TOA gel was dispersed effectively in the PLA matrix, reacting with both PLA and lignin to improve compatibility and toughness. The gel enhanced molecular chain mobility, increasing composite crystallinity, though it slightly reduced thermal stability. The fracture elongation of the composites rose significantly with higher TOA content, increasing from 6 % (pure PLA) to 32 %. At an ESO∶TOA ratio of 5∶5, the gel particles achieved optimal dispersion, yielding the best overall performance, including an impact strength of 4.1 kJ/m².

Key words: poly(lactic acid), epoxy soybean oil, tung oleic anhydride, lignin, mechanical property

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