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A study of the mechanical, thermal and morphological properties of microcrystalline cellulose particles prepared from cotton slivers using different acid concentrations |
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| Authors: | Kunal Das Dipa Ray N R Bandyopadhyay Tony Ghosh Amar K Mohanty Manjusri Misra |
| Institution: | 1. School of Materials Science and Engineering, Bengal Engineering and Science University, Shibpur, Howrah, 711103, India 2. Department of Polymer Science & Technology, University College of Science and Technology, University of Calcutta, 92 A.P. C Road, Kolkata, 700009, India 3. Department of Plant Agriculture & School of Engineering, Crop Science Building, University of Guelph, Guelph, ON, N1G 2W1, Canada 4. School of Engineering and the Department of Plant Agriculture, Thornbrough Building, University of Guelph, Guelph, ON, N1G 2W1, Canada |
| Abstract: | 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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