低共熔溶剂中淀粉羟丙基醚化的研究  

Study on Hydroxypropyl Etherification of Starch in Deep Eutectic Solvents

作　　者：张梦楠 刘昆 王士林 赵永辉 王耀 桂子凡 ZHANG Meng-nan;LIU Kun;WANG Shi-lin;ZHAO Yong-hui;WANG Yao;GUI Zi-fan(College of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学化学与化工学院,安徽合肥230009

出　　处：《安徽化工》2020年第2期41-45,共5页Anhui Chemical Industry

摘　　要：在[氯化胆碱][乙二醇]低共熔溶剂中对玉米淀粉进行羟丙基醚化反应,反应温度为40℃,反应时间分别为12 h、24 h和48 h,环氧丙烷添加量分别为干基淀粉量的10%、30%、50%(质量比).产品羟丙基化淀粉的FT-IR图谱中1050~1200 cm^-1附近出现了强吸收峰和1H-NMR测试中出现的醚基特征信号,均证实了淀粉醚化反应的发生.羟丙基取代度随着环氧丙烷的添加量和反应时间而增加.另外,XRD谱图表明,与原始淀粉相比,醚化淀粉的结晶度显著降低.通过SEM发现,原始淀粉为分散的圆形、钟形或半椭圆颗粒,而醚化淀粉颗粒尺寸增大,并呈现不规则形状.The hydroxypropylation of corn starch in the deep eutectic solvent was carried out at 40℃with 10 wt%,30 wt%,and 50 wt%addition of propylene oxide to the dry starch for 12 h,24 h,and 48 h,respectively.The appearance of absorbing strong peaks near wavelength of 1050~1200cm^-1 in the FT-IR spectra and characteristic peak of ether group in the 1H NMR spectra of etherified starch confirmed the occurance of starch etherification.The degree of substitution showed increase with addition amount of propylene oxide and reaction time.Additionally,the XRD spectra showed the increase in degree of crystallinity for the etherified starch compared to the native starch.The SEM pictures revealed that the native starch particles were separate ones with shapes such as spheres,bells,and ellipsoids while the etherified starch particles showed increases in size and irregular shapes.

关 键 词：醚化淀粉 羟丙基化 低共熔溶剂 理化特性 

分 类 号：TQ016.1[化学工程]