棕榈酸木薯淀粉酯的制备及性能研究

doi:10.3969/j.issn.1001-1803.2020.09.004

Abstract

Abstract:

Using cassava starch as raw material, palmitic acid as esterification agent, sodium silicate and acetic acid as composite catalysts, palmitate cassava starch was prepared by dry process. The effects of palmitate, catalyst, reaction time and reaction temperature on the degree of substitution and surface tension of starch ester were studied. The relationship between the degree of substitution of palmitate cassava starch and its surface activity and emulsifying property was studied. The results of the degree of substitution and infrared spectrum show that the starch has been esterified by palmitate acid. The optimum reaction conditions are as follows: the amount of cassava starch is 100 g, the amount of palmitic acid is 15 g, the amount of composite catalyst (the mass ratio of sodium silicate to acetic acid is 5∶1) is 7.5 g, the reaction temperature is 160 ℃, and the reaction time is 4 h. The DS of the product is 0.012 3, its palmitate content is 2.39% (w/w), the critical micelle concentration is 30 g/L, and its surface tension is 25.87 mN/m. The test results indicate that the palmitate cassava starch has good surface activity and emulsifying property.

Key words: palmitate cassava starch, degree of substitution, surface tension, surfactivity, emulsifiability

CLC Number:

TS239.6

WEI Ai-fen,YU Bin,WEI Li-min. Preparation and properties of palmitate cassava starch[J].China Surfactant Detergent & Cosmetics, 2020, 50(9): 603-608.

Figures/Tables 8

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	乳化能力/%	乳化稳定性/%
淀粉酯(DS=0.004)	42.63	90.67
淀粉酯(DS=0.008)	46.15	93.60
淀粉酯(DS=0.012)	47.79	98.22
SDS	47.21	93.47
LAS	47.38	98.28

Preparation and properties of palmitate cassava starch

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