【摘要】 以玉米淀粉为原料,分别用不同浓度的盐酸溶液和复合酶在一定条件下制备多孔淀粉。对制得的多孔淀粉进行形态结构和部分性质的测定,并对两种方式处理所得产品的吸水性和吸油性进行对比。结果显示,料液比1∶4、8%浓度的盐酸溶液、45℃下水浴反应20h制备的多孔淀粉在吸水和吸油性能上与酶法制备的多孔淀粉较为相似,同时相对于原淀粉性能有很大的提高。扫描电子显微镜(SEM)显示,酶法制备的多孔淀粉表面布有类似蜂窝状的孔洞或凹坑,而酸法制得的多孔淀粉颗粒具有随机性,效果不如酶法处理。与原淀粉相比,酸法制备的多孔淀粉糊化开始温度略微升高,而峰值黏度有很大降低。酸法制备多孔淀粉的方法简单廉价,相对酶法具有工业生产价值及较高的价格优势。更多还原

【Abstract】 Porous starch was made of corn starch by using of different concentrations of hydrochloric acid or compound enzyme under certain conditions. The morphology and some properties of the prepared porous starch were determined. Water absorption and oil absorption of the two products were compared. The results showed that the porous starch which made in the conditions of solid to liquid ratio 1∶ 4,the concentration of hydrochloric acid 8%,temperature 45℃ and time 20h was similar to that made by enzymatic hydrolysis on water absorption and oil absorption,and the property was greatly improved on the basis of the native starch. The SEM results showed that the surface of porous starch made by enzymatic hydrolysis was covered with holes and pits. But the starch granules made by acid hydrolysis were random,and the effect was worse than enzymatic hydrolysis. Compared with native starch,gelatinization start temperature of porous starch was slightly increased but peak viscosity was decreased in a great degree. With high price advantage than enzymatic hydrolysis,acid hydrolysis was simple and inexpensive,and had industrial production value.更多还原