微乳化超声活化拟均相低温氧化法制备双醛淀粉  

Preparation of Dialdehyde Starch by Micro-Emulsion Ultrasonic Activation and Homogeneous Oxidation at a Low Temperature

作　　者：刘晓庚[1,2] 陈梅梅[3] 赵志毅[1,2] 高梅[1,2] 彭冬梅[1,2] 张雅坤[1,2] 

机构地区：[1]南京财经大学食品科学与工程学院,南京210046 [2]江苏省粮油品质控制及深加工技术重点实验室,南京210046 [3]南京财经大学图书馆,南京210046

出　　处：《中国粮油学报》2013年第5期69-74,共6页Journal of the Chinese Cereals and Oils Association

基　　金：江苏省高等学校大学生实践创新训练计划(SJ201218)

摘　　要：设计以橡子淀粉为原料,NaIO4为氧化剂的微乳化超声活化法拟均相两段工艺制备双醛淀粉(DAS)的新工艺,考察了橡子淀粉原料粒度和纯度、预处理温度、微乳剂及其用量、超声活化和NaIO4氧化等对制备DAS的影响。首次提出了DAS制备的微乳化超声活化处理方法,并分析了微乳化超声活化的原理。正交试验结果表明:在以醛基含量为考察指标下,预处理温度为5060℃;乳化体系以用非离子表面活性剂(聚乙烯吡咯烷酮K30)、十二烷基三甲基溴化铵/正丁醇/水为宜;超声活化淀粉乳的优组合为:超声活化温度50℃、超声活化时间45 min、超声功率40 W、超声频率40 kHz。NaIO4氧化试验得到的最佳条件为:反应温度45℃、反应时间3 h、pH 3.54.0、n(NaIO4)∶n(淀粉)=0.8∶1.0。在上述优化条件下制备的DAS醛基含量最高达到98.56%。经光谱和理化性能等指标的检测证实所得的DAS与文献报道的DAS相符合。we designed a new technique with acorn starch as raw material and NaI04 as oxidant, and prepared the dialdehyde starch （DAS） by two techniques of homogeneous oxidations which were micro - emulsion and uhra- sound activation. And then we studied in this paper the influences of acorn starch size and purity, pretreatment temperature,microemulsion and its dosage, ultrasonic activation and NalQ oxidation on the synthesis of DAS. It was the first time to propose the approach of DAS preparation by micro - emulsion and ultrasound activation, which was followed by the discussion about their principles. The results of orthogonal tests showed that, pretreatment temperature was 50 - 60 ℃ when the aldehyde content was regarded as the indexes ; the emulsion system was better with non - ionic surfactant（ polyvinyl pyrrolidone K30） and dodecyl trimethyl ammonium bromide/n -butanol/water;the optimal ultrasonic activation conditions of starch mild were that：activation temperature of 50 ℃ ,activation time of 45minutes, ultrasonic power of 40 W and ultrasonic frequency of 40 kHz. In NalO4 oxidation experiments, the optimal conditions were as follow：reaction temperature of 45 ℃, reaction time of 3 h, pH of 3.5 -4.0 and n（ NaIO4 ） to n （starch） ratio of 0.8： 1.0. The prepared sisted with that described DAS aldehyde content in the optimal conditions was up to 98.56%. The prepared DAS con- in the literatures by the spectral and physieochemical properties detections.

关 键 词：橡子淀粉 微乳化 拟均相 NaIO4氧化 超声活化 双醛淀粉 

分 类 号：TS236.9[轻工技术与工程—粮食、油脂及植物蛋白工程]