聚羟基脂肪酸酯/茶粉复合材料的制备与性能研究  

Preparation and properties of polyhydroxyalkanoate/tea plant fiber composites

作　　者：李家伟 张克宏[1] 李文慧 郭星雨 丁宇 LI Jiawei;ZHANG Kehong;LI Wenhui;GUO Xingyu;DING Yu(Textile Engineering and Academy of Art,Anhui Agricultural University,Hefei 230036,China)

机构地区：[1]安徽农业大学轻纺工程与艺术学院,合肥230036

出　　处：《中国塑料》2023年第6期10-15,共6页China Plastics

基　　金：近海流域环境测控治理福建省高校重点实验室2020年度开放课题(S1-KF2003);安徽省自然科学基金面上项目(1908085ME154);安徽省级教学示范课项目(2020SJJXSFK09);安徽农业大学校级大学生创新创业训练计划项目(X202210364002、X202210364591、X202210364600、X202210364606)。

摘　　要：以茶粉(TPF)为原料,经甲基丙烯酸缩水甘油酯(GMA)改性后采用溶液法与聚羟基脂肪酸酯(PHA)复合,制得PHA/TPF复合材料;采用智能拉伸试验机、傅里叶红外光谱仪、热重分析仪和扫描电子显微镜对复合材料的力学性能、化学结构、热稳定性和微观形貌进行表征,研究了TPF和GMA含量对复合材料性能的影响及其作用机理。结果表明,PHA/TPF复合材料的拉伸强度和断裂伸长率随TPF的增加呈先增后减的变化趋势;TPF含量为15%(质量分数,下同)时,PHA/TPF复合材料的力学性能最佳,与纯PHA相比拉伸强度提高了约28.87%、断裂伸长率提高了约52.31%。经GMA改性后,TPF在PHA基体中的相容性和分散性得到明显改善,提升了PHA/TPF复合材料的力学性能和热稳定性;随GMA用量的增大,PHA/TPF/GMA复合材料的拉伸强度和断裂伸长率呈先增后减的变化趋势;GMA用量为3%时复合材料性能最佳,与PHA/GMA复合材料相比,拉伸强度提高了约66.03%、断裂伸长率提高了约45.01%。Poly(hydroxyalkanoate)(PHA)/tea plant fiber(TPF)composites were prepared by using glycidyl methacrylate(GMA)-modified TPF and PHA as raw materials through solution casting,and their mechanical properties,chemical structure,thermal stability,and microscopic morphology were characterized using an intelligent tensile testing machine,Fourier-transformation infrared spectrometer,thermogravimetric analyzer,and scanning electron microscope.The effects of TPF and GMA contents on the properties of the composites and their action mechanisms were investigated.The results indicated that the composites exhibited an increase at first and then a decrease in tensile strength and elongation at break with an increase in the TPF content.The composites obtained optimal performance at a TPF content of 15 wt%,resulting in an increase in tensile strength by 28.87%and in elongation at break by 52.31%compared to pure PHA.The compatibility between the GMA-modified TPF and PHA was improved,leading to an enhancement in the mechanical properties and thermal stability of the composites.The composites showed an increase at first and then a decrease in tensile strength and elongation at break with an increase in the GMA content.The composites obtained optimal performance at a GMA content of 3 wt%,resulting in an increase in tensile strength by 66.03%and elongation at break by 45.01%compared to the counterpart without GMA.

关 键 词：聚羟基脂肪酸酯 茶粉 甲基丙烯酸缩水甘油酯 复合材料 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]