【摘要】 以红薯淀粉为原料,用环氧氯丙烷作交联剂,氯乙酸作羧甲基化试剂,合成交联-羧甲基复合变性淀粉。确定了交联-羧甲基复合变性红薯淀粉合成工艺的最佳条件——反应温度55℃,反应时间4 h,配料比m(淀粉)∶m(氯乙酸):m(NaOH)=1∶0.48∶0.44。交联-羧甲基复合变性红薯淀粉的粘度增大,糊化温度降低、糊化时间缩短、糊透明度得到改善。红外光谱分析证实在淀粉中引入了羧甲基。更多还原

【Abstract】 The cross-linking carboxymethyl modified starch was prepared by sweet potato starch and 2-chloroacetic acid 3-chlorol,2-epoxypropare eatalyzing with alkaline.The optimum conditions were determined.Compared with native starch,CCMS showed higher viscosity,better paste transparency and phycial-chemical behavior.CCMS possess the stronger environment adaptability with good and applied function.The FTIR results showed the group of carboxymethyl had been induced in starch molecule.更多还原