Preparation and Characterization of Cellulose Nano-Whiskers Extracted from Microcrystalline Cellulose by Acid Hydrolysis

산 가수분해를 이용하여 microcrystalline cellulose로부터 추출 된 cellulose nano-whisker의 특성분석

  • Jeong, Hae-Deuk (Polymer Processing Research Lab, Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Yoon, Chang-Rok (Polymer Processing Research Lab, Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Lee, Jong-Hyeok (Polymer Processing Research Lab, Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Bang, Dae-Suk (Polymer Processing Research Lab, Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
  • 정해득 (국립금오공과대학교 고분자공학과) ;
  • 윤창록 (국립금오공과대학교 고분자공학과) ;
  • 이종혁 (국립금오공과대학교 고분자공학과) ;
  • 방대석 (국립금오공과대학교 고분자공학과)
  • Received : 2010.02.17
  • Accepted : 2010.03.19
  • Published : 2010.03.30

Abstract

Cellulose nanowhiskers (CNW) gamered increasing interest for their remarkable reinforcement of polymer composites. In this work, we were to produce cellulose whiskers from commercially available microcrystalline cellulose (MCC) by acid hydrolysis with sulfuric and hydrochloric acids. Electron microscopy found that each acid produced sililar cellulose crystals of diameters ranging from 20 to 30 nm and lengths ranging from 200 to 300 nm. Moreover, all samples showed remarkable flow birefringence through crossed polarization filters. Conductometric titration of CNW suspensions revealed that the sulfuric acid treated sample had a surface charge of between 140.00 mmol/kg and 197.78 mmol/kg due to sulfate groups, while that of the hydrochloric acid treated sample was undetectable. Thermogravimetric analysis showed that the thermal decomposition temperature and apparent activation energy (evaluated by Broido's method at different stages of thermal decomposition.) of H1-CNW - prepared by hydrolysis with hydrochloric acid - was higher than those of S1-CNW and S2-CNW - prepared by hydrolyzing MCC with sulfuric acid.

Acknowledgement

Supported by : Kumoh National Institute of Technology

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