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Pretreatment of Bamboo Powder for Cellulose Nanocrystalline by Sulfuric Acid Hydrolysis

Articles

Journal/Conference:

CURRENT TRENDS IN THE DEVELOPMENT OF INDUSTRY, PTS 1 AND 2

Language:

English

Author:

Chen Fang; Hong Bo; Guo Xing

Experts:

Xue Guoxin

Year:

2013

Volume:

785-786

Pages:

346-353

Keywords:

cellulose nanocrystalline; bamboo powder; pretreatment; sulfuric acid

The pretreatment of bamboo fiber by the sulfuric acid was investigated by means of experiments. Effect of the sulfuric acid concentration, reaction temperature, hydrolysis time, and solid-liquid ratio on the yield of Cellulose Nanocrystalline (CNC) was studied by orthogonal experiments and single factor experiments. Pretreatment with 60% sulfuric acid and 1:8 solid-liquid ratio for 90 mm at 45 degrees C was found to be the most optimal condition for pretreatment of bamboo powder for CNC. After pretreatment at the optimal condition, 30.2% of theoretical yield was obtained. Meanwhile, the study of rheological properties showed that CNC had a shear thinning phenomenon, the viscosity of CNC varied in different temperature and different concentrations. We can draw the conclusion through Transmission electron microscopy (TEM) that CNC was mainly existed in two forms of rod and porous network, and had a basic chemical structure of cellulose, while the molecular internal hydrogen bonds were destroyed.