聚乳酸/纤维素纳米晶复合材料的制备与性能研究

doi:10.19491/j.issn.1001-9278.2018.03.004

中国塑料 ›› 2018, Vol. 32 ›› Issue (03): 22-26.DOI: 10.19491/j.issn.1001-9278.2018.03.004

聚乳酸/纤维素纳米晶复合材料的制备与性能研究

张静¹,丁长坤²,段镜月³,李倩³,程博闻²

1. 天津工业大学材料科学与工程学院
2. 天津工业大学
3. 天津工业大学材料科学与工程学院天津市先进纤维与储能技术重点实验室

收稿日期:2017-07-26 修回日期:2017-11-07 出版日期:2018-03-26 发布日期:2018-04-26

Preparation and Properties of Polylactic Acid/Cellulose Nanocrystal Composites

Received:2017-07-26 Revised:2017-11-07 Online:2018-03-26 Published:2018-04-26

摘要/Abstract

摘要： 研究了添加表面活性剂十二烷基三甲基氯化铵(DTAC)前后，纤维素纳米晶(CNC)在水体系中的分散，并采用溶液浇注法制备了聚乳酸(PLA)/CNC纳米复合材料。结果表明，有效减少了DTAC处理后的CNC(mCNC) 的团聚现象，PLA与mCNC间的相容性增强，并通过氢键产生较强的界面相互作用；mCNC能促进PLA的异相成核，提高复合材料的结晶度；mCNC的含量为2 %（质量分数，下同）时，PLA的拉伸强度提高了70.7 %，但断裂伸长率有所下降。

Abstract: Dispersibility of cellulose nanocrystal (CNC) in water before and after adding a dodecyl trimethyl ammonium chloride (DTAC) surfactant was investigated, and then polylactic acid (PLA)/CNC composites were prepared by a solution casting method. The results indicated that the aggregation of CNC was effectively reduced with the aid of DTAC, and the compatibility between PLA and surface-treated CNC was improved due to the formation of hydrogen bonding. Moreover, the heterogeneous nucleation of PLA could be promoted in the presence of surface-treated CNC, leading to an increase in crystallinity of PLA matrix. The tensile strength of composites was improved by 70.7 % with the addition of 2 wt % surface-treated CNC, but their elongation at break decreased.

张静丁长坤段镜月李倩程博闻. 聚乳酸/纤维素纳米晶复合材料的制备与性能研究[J]. 中国塑料, 2018, 32(03): 22-26.

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聚乳酸/纤维素纳米晶复合材料的制备与性能研究

Preparation and Properties of Polylactic Acid/Cellulose Nanocrystal Composites

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