Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (8): 1662.

• Articles • Previous Articles     Next Articles

Preparation and Characterization of a Novel Thermoplastic Starch Using Dimethyl Sulfoxide as the Plasticizer

ZHANG Kun-Yu1,2, RAN Xiang-Hai1,2, WU Hang1,2, YAO Bin1, HAN Chang-Yu1, ZHANG Hui-Liang1, ZHUANG Yu-Gang1, DONG Li-Song1*   

  1. 1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Changchun 130022, China;
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-12-15 Online:2009-08-10 Published:2009-08-10
  • Contact: DONG Li-Song. E-mail: dongls@ciac.jl.cn
  • Supported by:

    中国科学院方向性项目(批准号: KTCX-YW-208)资助.

Abstract:

A novel thermoplastic starch was prepared by melting processing method using dimethyl sulfoxide(DMSO) as a plasticizer. The effect of the plasticizer was investigated by a combination of FTIR, XRD, SEM, DMA and tensile testing techniques, and was compared with the more conventional plasticizers, glycerol and glycerol/water. FTIR analysis show that DMSO act as a hydrogen bond acceptor and can form stable hydrogen bonds with starch. XRD and SEM results indicate that the crystalline of starch is destructed and the starch granules transferred to a continuous amorphous phase. It was found that the DMSO could more effectively restrain the retrogradation than the plasticizers, glycerol and glycerol/water, due to the stronger hydrogen bonds. The mechanical analysis showed that the effect of the DMSO was better than glycerol and glycerol/water.

Key words: Thermoplastic starch; Dimethyl sulfoxide(DMSO); Hydrogen bond

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