化工技术与开发
化工技術與開髮
화공기술여개발
Technology & Development of Chemical Industry
2015年
10期
5-9
,共5页
醋酸酯淀粉%取代度%微波%干法
醋痠酯澱粉%取代度%微波%榦法
작산지정분%취대도%미파%간법
acetate Starch%degree of substitution%microwave%dry preparation
以木薯淀粉为原料，醋酸酐为酯化剂，采用微波辅助干法制备醋酸酯淀粉。用红外光谱分析对木薯醋酸酯淀粉进行表征，用酸碱滴定的方法测定木薯醋酸酯淀粉的取代度，考察酯化剂用量、反应温度、反应时间、反应体系pH值对醋酸酯淀粉取代度及反应效率的影响。通过正交试验得到了微波法制备醋酸酯淀粉的最佳工艺条件：醋酸酐用量7%，反应温度70℃，微波时间700s，反应体系pH=8。在此条件下所得醋酸酯淀粉取代度（DS）为0.0951，酯化反应效率为79.14%。
以木藷澱粉為原料，醋痠酐為酯化劑，採用微波輔助榦法製備醋痠酯澱粉。用紅外光譜分析對木藷醋痠酯澱粉進行錶徵，用痠堿滴定的方法測定木藷醋痠酯澱粉的取代度，攷察酯化劑用量、反應溫度、反應時間、反應體繫pH值對醋痠酯澱粉取代度及反應效率的影響。通過正交試驗得到瞭微波法製備醋痠酯澱粉的最佳工藝條件：醋痠酐用量7%，反應溫度70℃，微波時間700s，反應體繫pH=8。在此條件下所得醋痠酯澱粉取代度（DS）為0.0951，酯化反應效率為79.14%。
이목서정분위원료，작산항위지화제，채용미파보조간법제비작산지정분。용홍외광보분석대목서작산지정분진행표정，용산감적정적방법측정목서작산지정분적취대도，고찰지화제용량、반응온도、반응시간、반응체계pH치대작산지정분취대도급반응효솔적영향。통과정교시험득도료미파법제비작산지정분적최가공예조건：작산항용량7%，반응온도70℃，미파시간700s，반응체계pH=8。재차조건하소득작산지정분취대도（DS）위0.0951，지화반응효솔위79.14%。
Applied cassava starch as raw material, acetic anhydride as the acetylize reagent the acetate starch was prepared by the dry conditions assisted by microwave. The effect of reaction factors such as esterification agent dosage, reaction temperature, reaction time, and system pH value on degree of substitution(DS) and reaction efficiency(RE) were investigated. The optimum conditions confirmed by orthogonal:the acetic anhydride amount 7%, reaction temperature 70℃, reaction time 700s and system pH value was 8. Under these conditions, the degree of substitution was 0.0951 and the reaction efficiency was 79.14%.
