EPR/PP/M-CNF纳米复合材料的制备及性能研究
Preparation and properties of EPR/PP/M-CNF nanocomposites
韩贤新 1王宇威 1樊丽权 1姜永旺 1岳莹 1许珂琳 1李玉鑫 1刘喜军1
作者信息
- 1. 齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔 161006
- 折叠
摘要
纤维素纳米纤维(CNF)经碱液预处理得到碱预处理纤维素纳米纤维(APCNF),再通过二元乙丙橡胶接枝乙烯醇(EPR-g-VA)接枝共聚物溶液处理后,得到改性纤维素纳米纤维(M-CNF).然后将M-CNF添加到EPR/PP共混体系中,制备EPR/PP/M-CNF纳米复合材料.通过扫描电子显微镜、偏光显微镜、热重分析仪、动态热机械分析仪、电子万能试验机等对EPR/PP/M-CNF纳米复合材料的微观形貌、球晶尺寸、热稳定性以及力学性能进行分析测试.结果表明,EPR、EPR-g-VA包覆APCNF形成"核-壳"结构;相对于EPR/PP共混物,EPR/PP/M-CNF纳米复合材料的热学性能和力学性能均有明显提高,EPR/PP/M-CNF纳米复合材料的冲击强度和初始热分解温度分别为13.80 kJ/m2和368.73℃,并且复合材料中PP相的球晶尺寸变小,晶界面模糊.
Abstract
Cellulose nanofihers(CNF)were pretreated by alkali solution to obtain alkali pretreated cellulose nanofihers(APCNF),and then modified cellulose nanofibers(M-CNF)were obtained by binary ethylene propylene rubber grafted with ethylene alcohol(EPR-g-VA)copolymer solution.Then M-CNF was added to EPR/PP blend system to prepare EPR/PP/M-CNF nanocomposites.The microstructure,spherulite size,thermal stability and mechanical properties of EPR/PP/M-CNF nanocomposites were analyzed and tested by scanning electron microscope,polarizing microscope,thermogravimetric analyzer,dynamic thermomechanical analyzer and electronic universal testing machine.The results showed that EPR and EPR-g-VA coated APCNF formed a"core-shell"structure.Compared with EPR/PP blend,the thermal and mechanical properties of EPR/PP/M-CNF nanocomposites are significantly improved.The impact strength and initial thermal decomposition temperature of EPR/PP/M-CNF nanocomposites are 13.80 kJ/m2and 368.73 ℃,respectively.In addition,the spherulite size of PP phase in the composite decreases and the grain interface is blurred.
关键词
聚丙烯/二元乙丙橡胶/复合材料/纤维素纳米纤维Key words
polypropylene/binary ethylene propylene rubber/composite material/cellulose nanofibers引用本文复制引用
基金项目
黑龙江省重点研发计划指导类项目(GZ20210034)
黑龙江省聚合物基复合材料重点实验室开放课题(CLKFKT2021B23)
出版年
2024
NETL
NSTL
万方数据