【摘要】 以板栗淀粉为原料、环氧丙烷为醚化剂、无水Na₂SO₄为抑制淀粉分子膨胀剂,通过单因素和响应面实验,对羟丙基板栗淀粉的工艺优化及其微观结构进行了研究。结果表明,制备羟丙基板栗淀粉的最佳工艺条件为:环氧丙烷用量15%、无水Na₂SO₄用量15%、温度40℃、时间20 h,该条件下,产品取代度可达到0.122。各因素对羟丙基板栗淀粉取代度的影响依次为:环氧丙烷用量>无水Na₂SO₄用量>温度>时间。通过扫描电镜观察,改性后的板栗淀粉分子表面出现了不同程度的凹陷、褶皱。红外光谱分析显示,羟丙基板栗淀粉分子在（1250¹350）cm^—1处被环氧丙烷取代,C-O-H键发生位移,吸收峰减小,发生酯化反应。更多还原

【Abstract】 Hydroxypropyl chestnut starch was produced, which was prepared by using chestnut starch as raw material, the etherified reagent of epoxy propane and anhydrous sodium sulfate. The single factor test and response surface analysis were carried out in this paper. The optimized process of hydroxypropyl chestnut starch and its microstructure were studied. The results indicated that the optimum preparation conditions were obtained as follows: the concentration of epoxy propane 15%, the concentration of anhydrous sodium sulfate 15%, reaction temperature 40 ℃ and reaction time 20 h were optimum technical conditions for synthesis of hydroxypropyl chestnut starch. In this condition, the molar substitution of hydroxypropyl chestnut starch can reach 0.122. Observed by SEM, modified the chestnut starch granules appear sag and different degrees of folding. The IR spectrum analysis showed the hydroxypropyl chestnut starch molecules were replaced by epoxy propane at（1250¹350）cm^—1, and the C-O-H bond was displaced, and the absorption peak decreased. The etherification reaction of chestnut starch was successful.更多还原