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Preparation and characterization of cellulose nanofibers from de-pectinated sugar beet pulp

Author:
Li, Meng, Wang, Li-jun, Li, Dong, Cheng, Yan-Ling, Adhikari, Benu
Source:
Carbohydrate polymers 2014 v.102 pp. 136-143
ISSN:
0144-8617
Subject:
Fourier transform infrared spectroscopy, alkali treatment, biocomposites, bleaching, cellulose, chemical analysis, crystal structure, hemicellulose, homogenization, lignin, nanofibers, sugar beet pulp, temperature, thermal degradation
Abstract:
Cellulose nanofibers (diameter=10–70nm) were produced using chemical treatments (alkali treatment and bleaching) and high pressure homogenization from de-pectinated sugar beet pulp (DSBP). Chemical analysis and Fourier transform infrared spectroscopy (FTIR) indicated that the chemical treatments greatly removed the hemicellulose and lignin from the DSBP and significantly increased the cellulose content. The crystallinity of the cellulose nanofibers increased from 35.67% to 69.62% after alkali treatment and bleaching. The thermal degradation temperature of DSBP cellulose nanofibers was 271.7°C which was found to be 47.3°C higher than that of the untreated DSBP. The DSBP cellulose nanofibers can be preferably used as reinforcement in the biocomposite material at high temperature.
Agid:
5407500