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Isolation and characterization of cellulose nanocrystals from cloth hairs and evaluation of their compatibility with PLLA

Author:
Ding, Meichun, Li, Chenwei, Chen, Fushan
Source:
Cellulose 2017 v.24 no.11 pp. 4785-4792
ISSN:
0969-0239
Subject:
cellulose, crystal structure, crystallization, hairs, hydrolysis, nanocrystals, particle size, phosphoric acid, polymerization, polymers, thermal stability
Abstract:
Cellulose nanocrystals were successfully isolated from cloth hairs using phosphoric acid. The yields, degree of polymerization, morphology, average particle size, crystallinity, chemical structure, and thermal stability of the prepared nanocrystals were investigated. The results demonstrated that yields and degree of polymerization decreased with the increase of concentration of phosphoric acid due to preferential degradation of amorphous cellulose, resulting in high thermal stability and crystallinity. Morphological analysis revealed that hydrolysis was more homogeneous with increasing acid concentration. In comparison with the cellulose nanocrystals prepared with 6.5, 8.0, and 9.5 M H₃PO₄, those prepared with 11.0 M H₃PO₄ had the most uniform particle sizes. Moreover, the nanocrystals had important influence on the crystallization of semicrystalline polymer.
Agid:
5845940