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

Journal of the Brazilian Chemical Society

Müller, Carmen M. O.¹  Universidade Federal de Santa Catarina, Florianópolis, Brazil¹  Gross, Idejan P.¹  Pires, Alfredo T. N.¹  Universidade Tecnológica Federal do Paraná, Pato Branco, Brazil¹  Vestena, Mauro¹ 

关键词:  cellulose nanocrystals;    poly(lactic acid);    crystallization kinetics;    nanocomposites;   

DOI  :  10.5935/0103-5053.20150343

学科分类：化学（综合）

来源: SciELO

【 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.

【 授权许可】

Unknown