A NOVEL ENZYMATIC PREPARATION TECHNOLOGY OF NANOCRYSTALLINE CELLULOSE FROM BAMBOO FIBERS
Nanocrystalline cellulose (NCC), also called cellulose nanocrystals, is typically a rigid rodshaped monocrystalline cellulose domain (whisker) with 1-100 nm in diameter and tens to hundreds of nanometers in length. Traditionally, NCC is almost prepared by acid hydrolysis and mechanical treatment, and the raw materials mainly focus on wood cellulose, microcrystalline cellulose (MCC) and animal fibres. In this contribution, enzymatic hydrolysis was chosen to produce cellulose nanocrystals. After the homogenizer, a kind of commercial cellulase, viz. enzyme Cclast (endoglucanase) was used in the process of enzymatic hydrolysis. The effect of enzymatic treatment on the morphology of the ensuing particles is reported. The prepared cellulose nanocrystals were morphologically characterized by transmission electron microscopy (TEM) and the sugar analyses of hydrolysis residues were characterized by ionic chromatography. The degree of polymerization (DP) was characterized by automatic viscosimeter. All bamboo nanofibers presented a rod-like shape, an average diameter (D) of 5.3 nm and length (L) of 221 nm, with an aspect ratio (L/D) of around 42. The use of endoglucanases allows obtaining a mixture of microfibrillated cellulose (MFC) and rod-like nanoparticles.
nanocrystalline cellulose enzymatic hydrolysis commercial cellulose bamboo fibers characterization
Yong Zhang Sheng Yao Xiumei Zhang Yu Zhao
Pulp and Paper Center, Key Laboratory of Advanced Textile Materials & Manufacturing Technology of Mi Paper chemical application technology department,Zhejiang Transfar Whyyon Chemical Co., Ltd,Hangzhou
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
1154-1157
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）