Nanocomposite of Poly(Lactic Acid)/Cellulose Nanocrystals: Effect of CNC Content on the Polymer Crystallization Kinetics

被引：23
|
作者：
Vestena, Mauro [1 ,2 ]
Gross, Idejan P. [1 ]
Mueller, Carmen M. O. [3 ]
Pires, Alfredo T. N. [1 ]
机构：
[1] Univ Fed Santa Catarina, Dept Quim, Grp Estudo Mat Polimer POLIMAT, BR-88040900 Florianopolis, SC, Brazil
[2] Univ Tecnol Fed Parana UTFPR, Dept Acad Quim, Campus Pato Branco, BR-85503390 Pato Branco, PR, Brazil
[3] Univ Fed Santa Catarina, Dept Ciencia & Tecnol Alimentos, BR-88034001 Florianopolis, SC, Brazil
来源：
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2016年 / 27卷 / 05期
关键词：
cellulose nanocrystals; poly(lactic acid); crystallization kinetics; nanocomposites; CRYSTAL-STRUCTURE; CELLULOSE; MORPHOLOGY; BEHAVIOR;
D O I：
10.5935/0103-5053.20150343
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The barrier and mechanical properties of polymer matrices are affected by the polymer crystallization kinetics and the incorporation of nanoparticles can modify the nucleation density as well as the rate and mechanism of crystallization. In this study, a nanocomposite of poly(lactic acid) (PLA) containing cellulose nanocrystals (CNC) was prepared in order to evaluate the effect of the CNC content on the crystallization kinetics of the polymer matrix. Dimethylformamide, a solvent of PLA, was used to replace the aqueous medium for the dispersion of the CNC, to facilitate the preparation of PLA films with dispersed CNC. Higher levels of CNC in the films induced an increase in the crystallization rate and reduced the degree of crystallinity without affecting the dimensions of the crystal lattice. In conclusion, the incorporation of CNC into PLA influences the crystallization kinetics, which significantly affects the PLA processing conditions.
引用
收藏
页码：905 / 911
页数：7
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