文献类型：期刊文献

中文题名：改性蓖麻油/聚乳酸共混材料的制备及性能研究

英文题名：Preparation and Performance Study of Modified Castor Oil/Polylactic Acid Blended Materials

作者：秦杰 杨乐 王姿懿 马嘉壕 周义淋 韦小旦 刘子豪 母俊锖

第一作者：秦杰

机构：[1]贵州理工学院材料与能源工程学院,贵州贵阳550025

第一机构：贵州理工学院材料与能源工程学院

年份：2025

卷号：53

期号：6

起止页码：76-82

中文期刊名：塑料科技

外文期刊名：Plastics Science and Technology

收录：;北大核心:【北大核心2023】；

基金：国家自然科学基金(52463003);贵州省科技计划项目一般项目(黔科合基础-ZK[2022]一般185);贵州理工学院大学生创新创业训练计划项目(202314440198)。

语种：中文

中文关键词：聚乳酸;改性蓖麻油;形状记忆;共混材料;生物基聚合物

外文关键词：Polylactic acid;Modified castor oil;Shape memory effect;Blending materials;Bio-based polymers

摘要：聚乳酸(PLA)作为一种生物降解聚合物,在包装、纺织和生物医学领域展现出应用潜力,但PLA材料在低温下的回复能力和形状记忆功能不足以支持其在某些特定条件下的使用。研究通过共混改性技术提升PLA在低温环境下的回复能力及形状记忆功能,将具有热致相变功能的改性蓖麻油与PLA共混。结果表明:制备的改性蓖麻油具有热致相变功能,将其分散在PLA基体中,可在保持PLA原有力学强度的同时显著提升PLA材料的低温回复性能。其中PLA20M的拉伸强度和断裂伸长率分别为(61.91±1.59)MPa和(7.51±0.96)%,与纯PLA的拉伸强度和断裂伸长率接近。与纯PLA相比,PLA20M在30~85℃的温度范围内呈现出连续的温度响应性,能够在较低温度下具有回复功能。PLA20M回复特性对温度十分敏感,回复速度较快,最终回复角达168.4°。改性蓖麻油能够提高PLA的形状记忆特性。研究为PLA在形状记忆材料领域的应用提供实验依据。
Polylactic acid(PLA)is a biodegradable polymer that has shown potential for applications in packaging,textiles,and biomedicine.However,the recovery capability and shape memory functionality of PLA materials at low temperatures are not sufficient to support their use under certain specific conditions.The study aims to enhance the lowtemperature recovery capability and shape memory functionality of PLA through the use of blending modification technology.Modified castor oil with thermally induced phase change properties was blended with PLA.The results show that the prepared modified castor oil has thermally induced phase change properties.When dispersed in the PLA matrix,it can significantly improve the low-temperature recovery performance of PLA materials while maintaining the original mechanical strength of PLA.For example,the tensile strength and elongation at break of PLA20M were(61.91±1.59)MPa and(7.51±0.96)%,respectively,which are close to those of pure PLA.Compared with pure PLA,PLA20M exhibits continuous temperature responsiveness in the temperature range of 30–85°C and has recovery functionality at lower temperatures.The recovery characteristics of PLA20M are highly temperature-sensitive,with a fast recovery speed and a final recovery angle of 168.4°.The modified castor oil can enhance the shape memory characteristics of PLA.The study provides an experimental basis for the application of PLA in the field of shape memory materials.