4.7 Article

Extraction, isolation and characterization of nanocrystalline cellulose from industrial kelp (Laminaria japonica) waste

Journal

CARBOHYDRATE POLYMERS
Volume 173, Issue -, Pages 353-359

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.05.079

Keywords

Kelp waste; Nanocrystalline cellulose; Yield; Aqueous dispersion; Hydrolysis

Funding

  1. Department of Education of Guangxi Zhuang Autonomous Region, China. [2017KY0633, 2017KY0634]

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Kelp (Laminaria japonica) is an economically important type of algae cultured in East Asia. Kelp waste is a by-product from the extraction of commercial alginate from kelp. This work reports the isolation of nanocrystalline cellulose (NCC) from the cellulose extracted from the kelp waste. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) show that the crystallinity index of the isolated kelp NCC was 69.4%, which was slightly higher than that of kelp cellulose as well as maintained the cellulose I crystalline form and typical cellulose chemical structure. In thermogravimetric analysis (TGA), kelp NCC showed decreased thermostability and a higher residual mass. Transmission electronic microscopy (TEM) confirmed the ordinary rod-like shape of the produced NCC with various dimensions. The kelp NCC aqueous dispersions displayed the expected characteristic optical and gel effects. Studies on the variables and the orthogonal experiment of NCC preparation contributed a maximum yield of 52.3%. The exploration on the preparation of kelp NCC in this study lays foundations for future applications. (C) 2017 Elsevier Ltd. All rights reserved.

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