高等学校化学学报2018，Vol.39Issue(2)：373-381,9.DOI:10.7503/cjcu20170513
纳米纤维素/聚乳酸全绿色纳米复合材料的
制备及性能
Preparation and Characterization of Nanocellulose / Polylactide Fully Green Nanocomposites
刘星 1王文俊 1邵自强 1李磊1
作者信息
- 1. 北京理工大学材料学院,北京市纤维素及其衍生材料工程技术研究中心,北京 100081
- 折叠
摘要
Abstract
A novel approach for mass production of filamentous nanocellulose(NC) with a transverse size of 20—40 nm and a length of 400—2000 nm was developed. The NC was modified with acetic anhydride, and obtained hydrophobic acetylated nanocellulose(ANC). NC and ANC were respectively blended with polylactide ( PLA) to prepare nanocomposites by a solution-casting process. The effect of filler content, chemical modification and blending methods on the mechanical and crystallization properties of nanocomposites were investigated. The results showed that ANC displayed better dispersibility than NC in PLA matrix. However, the improvement for mechanical properties of nanocomposites was not obvious. Moreover, differential scanning calorimetry(DSC) isothermal crystallization test showed that ANC increased crystallization rate and crystallinity degree of PLA simultaneously. The NC / PLA nanocomposites prepared by melt compounding not only maintained high modulus, high yield strength, but also exhibited better thermal stability and remarkably im-proved toughness. For instance, when the addition of NC was 3. 5％(mass fraction), the elongation at break of the nanocomposites increased by 12. 1 folds in comparison with that of neat PLA matrix.关键词
纳米纤维素/聚乳酸/熔融复合法/纳米复合材料Key words
Nanocellulose/Polylactide/Melt compounding/Nanocomposites分类
化学化工引用本文复制引用
刘星,王文俊,邵自强,李磊..纳米纤维素/聚乳酸全绿色纳米复合材料的
制备及性能[J].高等学校化学学报,2018,39(2):373-381,9.
