Synthesis and Characterization of Trimethylsilyl Starch Ether
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Abstract:
Silicon-based starch is a new type of starch derivative, with important applications in construction, textile, and paper industries. Trimethylsilyl starch ether (TMSS) was synthesized from cornstarch by gelatinization and acid hydrolysis, followed by etherification with trimethylchlorosilane (TMSCl) and pyridine (catalyst). The effect of the amount of TMSCl on the physicochemical properties of the product was evaluated, and the microstructure of the product was characterized. The results indicated that after gelatinization and etherification, the starch granule structure was modified, and its polarization disappeared. With the increase in the amount of TMSCl, the apparent viscosity and freeze–thaw stability of TMSS gradually decreased, while the solubility increased significantly compared to the original starch. The light transmittance rate of TMSS first decreased and then increased with the increase in TMSCl; however, the transparency of TMSS was higher than the original starch. This study provides a better understanding of the basic properties of silicon-based starch derivatives and an experimental basis for further research and applications.
