复合变性淀粉的理化性质及结构分析与表征  

Structural Analysis,Characterization and Physico-chemical Properties of Composite-modified Starch

作　　者：时君友[1] 顾继友[1] 涂怀刚[2] 王淑敏[2] 

机构地区：[1]东北林业大学材料与工程学院,黑龙江哈尔滨150040 [2]北华大学木材科学与工程系,吉林吉林132013

出　　处：《林产化学与工业》2008年第4期59-64,共6页Chemistry and Industry of Forest Products

基　　金：科技部农业转化资金项目(2007GB2B10078);吉林省科技发展计划重点项目(20060401-2)

摘　　要：针对所制得的酸解氧化接枝共聚的复合变性淀粉,通过红外光谱FT-IR、X射线衍射、电子扫描显微镜(SEM)等分析手段,证明了接枝共聚反应的发生,并通过常规化学分析方法,对其理化性质进行了较为系统的分析与表征。结果表明,FT-IR证明了酸解氧化玉米淀粉与丙烯酰胺发生了共聚反应;X射线衍射表明玉米淀粉的酸解、氧化、接枝共聚主要发生在无定型区;SEM扫描表明变性后的淀粉颗粒完整,颗粒表面粗糙。所研制的复合变性淀粉具有沉降体积大、成糊温度低、热糊稳定性高、冷糊黏度低等利于木材胶黏剂制造的特点。The occurrence of grafting copolymerization reaction was proved by analytical means such as FT-IR, X-ray diffraction, SEM, etc. on the obtained composite-modified starch. The physical and chemical properties of the starch were systemically analyzed and described by conventional chemical analysis method. The result of FT-IR analysis showed that there was copolycon- densation between acid-hydrolyzed and oxidized starch and acrylamide. X-ray diffraction detected that acid-hydrolysis, oxidation and grafting copolymerization of corn starch mainly occurred in the amorphous area. The result of SEM revealed that the granttlarity of the modified starch could be intact, but the surface of granule became rough. The results showed that composite-modified starch had the properties such as big sedimentation volume, low pasting-temperature, high hot-pasting stability and low cold-paste viscosity.

关 键 词：复合变性玉米淀粉 接枝共聚 

分 类 号：TQ91[化学工程]