期刊
CELLULOSE
卷 16, 期 5, 页码 783-793出版社
SPRINGER
DOI: 10.1007/s10570-009-9280-6
关键词
Microcrystalline cellulose; Acid hydrolysis; X-ray analysis; Thermogravimetric analysis; Transmission electron microscope
资金
- AICTE (All India Council for Technical Education), Government of India
- University of Guelph/OMAFRA Bioproducts
Microcrystalline cellulose (MCC) particles are mostly prepared by acid hydrolysis of various agro sources. Acid hydrolysis is usually carried out with high concentration (64 wt%) of sulfuric acid. Here, an attempt has been made to optimize lower acid concentrations which can effectively produce MCC particles. In this work, different concentrations of sulfuric acid (20, 30, 35, 40, 47 and 64 wt%) have been used to prepare MCC particles, which have been characterized by XRD, particle size analysis, scanning electron microscopy, transmission electron microscopy, nanoindentation and thermogravimetric analysis. MCC prepared with 35 and 47% sulfuric acid (MCC 35 and MCC 47) had finest particle size and fibrils were produced in the range of 15-25 nm. MCC 20 showed wide particle size distribution, indicating low breakdown of the cellulose chains. The energy absorption behavior and mechanical properties of the MCC pellets were determined by nanoindentation test for the first time. MCC 35 pellets exhibited lowest modulus and hardness.
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