期刊论文

Preparation of Nano-cellulose and Its Enhancements on Waterborne Polyurethane

中文

机械

1006-0316

2015

45

6

52-56

10.19342/j.cnki.issn.1009-9212.2015.06.015

国家自然科学基金资助项目（31170521）； 林业公益性行业科研专项经费项目（201504503）；

本校为第一机构

水性聚氨酯以水代替有机溶剂作为分散介质,在带来环境优势的同时降低了力学性能.在探索具有不同微观形貌和尺寸特征纳米纤维素制备技术基础上,研究纳米纤维素形态尺寸对水性聚氨酯的增强作用和机理.结果表明,联合使用机械剪切法和硫酸水解法,调节反应温度和反应时间等工艺条件,可以获得具有不同微观形貌和长度特征的纳米纤维素.当硫酸浓度60％、水解温度55℃、水解时间120 min时,制得纤维素平均长度为0.20 μm,长度在10—100 nm范围内的纳米纤维素达到34％,平均直径约为20 nm,平均长径比为10∶1,纤维呈光滑细长飞梭状.乳化预聚体法制备的纤维素/水性聚氨酯乳液具有较好的储存稳定性,纤维素/水性...

Waterborne polyurethane using water as dispersing media replaced the organic solvent, which brings environmental advantage but reduces the mechanical properties. Based on the preparation technology of nano-cellulose with different morphology and size characteristics, this paper studies the enhancement function and mechanism of nano-cellulose with different morphology and size characteristics on waterborne polyurethane. By using mechanical shearing method together with sulphuric acid hydrolysis method, adjusting the reaction temperature and time...