Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (11): 1693-1702.DOI: 10.19894/j.issn.1000-0518.220004

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Preparation and Properties of Rice Starch Film

Jing-Wen WANG, Ya-Wen LYU, Ya-Zhuo SHANG(), Hong-Lai LIU   

  1. Laboratory of Cosmetics,School of Chemistry & Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China
  • Received:2022-01-05 Accepted:2022-07-06 Published:2022-11-01 Online:2022-11-09
  • Contact: Ya-Zhuo SHANG
  • About author:shangyazhuo@ecust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21476072)

Abstract:

Rice starch particles have small and uniform particle size, good dispersibility in water and film-forming property, and can be degraded in nature. At present, starch is widely used in food packaging, medical dressings and cosmetics industries. Using rice starch as raw material, sodium hydroxide as paste, glycerol as plasticizer and citric acid as crosslinking agent and solution pH regulator, starch film was prepared by tape casting. By measuring the morphology of starch particles, the gelatinization conditions of starch particles, gelatinization temperature, apparent viscosity and pH value of starch solution, mechanical properties, light transmittance and potassium glycyrrhizinate release performance of starch film tostudy the gelatinization conditions of rice starch, the effects of mass fractions of citric acid, starch and glycerol on the properties of starch film and the release of carrier substances. The results show that the rice starch used in this paperexists in the state of dispersed particles, and the gelatinization temperature ranges from 82.5 to 100.8 ℃.Citric acid interacts with starch molecules in the process of starch film formation, and can adjust the pH value of the solution to adapt to human skin. When the concentration of starch in the starch film becomes higher, the hardness after film formation is greater. The higher the concentration of glycerol, the better the elongation at break of starch film and the worse the tensile strength. In addition, the transmittance of starch film is the best when the concentration is 3.0%, which with good light transmittance has low crystallinity. Finally, the starch film prepared in this paper can contain the effective substance dipotassium glycyrrhizinate, which can be used as a skin repair film in cosmetics.

Key words: Starch film, Gelatinization, Plasticizer, Crosslinking agent, Skin care

CLC Number: