羟丙基辛烯基复合改性蜡质玉米淀粉制备及在油脂微胶囊化应用

Preparation and application in Microcapsulation of hydroxypropyl and octenyl succinic anhydride compound modified waxy corn starch

以蜡质玉米淀粉为原料,经羟丙基醚化和辛烯基琥珀酸酯化复合改性淀粉,并研究两种改性方法先后顺序对复合改性淀粉取代度影响。结果表明:先羟丙基醚化后辛烯基酯化改性可获得较高功能基团取代度,故采用先醚化后酯化制备羟丙基辛烯基复合改性淀粉。经红外光谱分析测试得知,羟丙基辛烯基复合改性淀粉在1 570 cm–1、1 714 cm–1处出现新吸收峰,证明辛烯基琥珀酸基团被引入。将合成的羟丙基辛烯基复合改性淀粉制备低粘度的壁材,制备出表面油1.14%,包油效果达94.38%的高效包油粉末油脂。

The waxy corn starch was used in this experiment to prepare hydroxypropyl and octenyl succinic anhydride compound modified starch, the effect of the sequences of these two kinds of modification methods on the degree of substitution were studied. Results showed that the method of etherification firstly followed by esterification reaction was considered as the optimal selection. Since its higher substitution degree of functional groups. The FT-IR spectrum of compound modified waxy corn starch showed new absorption peaks at 1 570 cm-1, 1 714 cm-1, demostrating the introduction of RCOO-and C=O groups. The compound modified starch were applied as a low viscosity wall material to prepare oil microencapsules. Powdered oil that its surface oil was 1.14% and embedding ratio was 94.38% was successfully obtained.