微波强化碱润涨预处理对豆渣膳食纤维结构及其酯化反应的影响  

Influence of Microwave-assisted Alkali Pretreatment on Structure and Esterification Performance of Soybean Dietary Fiber

作　　者：杨婧[1] 郑为完[1] 高媛媛 

机构地区：[1]南昌大学食品科学与技术国家重点实验室,江西南昌330047 [2]江西维尔宝食品生物有限公司,江西高安330800

出　　处：《大豆科学》2012年第4期635-639,共5页Soybean Science

摘　　要：研究了碱润涨预处理和微波强化碱润涨预处理对豆渣膳食纤维化学结构,物理特性以及对豆渣纤维素酯化反应的影响。结果表明,与碱润涨预处理相比,微波强化碱润涨预处理对豆渣膳食纤维的活化效果更好,二者均没有改变豆渣纤维素的化学组分。在相同的反应条件下,没有经过预处理、碱预处理和微波强化碱润涨预处理豆渣纤维素酯的取代度分别为0.0445、0.0558和0.0681,即经过预处理后豆渣纤维素的反应可及度增大,酯化效率由57.57%提高到了88.10%,且随微波辐照时间的延长,豆渣纤维素酯的取代度增加。经过酯化改性后,豆渣纤维素酯具有较强的油污去除力,且随着酯化取代度的增加,去污力呈增加的趋势,可以应用在洗涤用品中。Alkali treatment and microwave-assisted alkali treatment were applied to pretreatment of soybean dietary fiber to improve its reactivity.The changes of chemical composition and physical characteristics of soybean dietary fiber after activation were studied.The effect of different pretreatments on the esterification of soybean dietary fiber was discussed.The result showed that activation effect on soybean dietary fiber after microwave-assisted alkali treatment was better than alkali treatment.The chemical composition of soybean dietary fiber was not changed,however,hydrogen bonds among soybean dietary fiber moleculars were partially destroyed and the surface was damaged.These changes resulted in the increase of accessibility,specific surface area and reactivity of soybean dietary fiber.Under the similar esterification condition,degree of substitution of soybean dietary fiber ester without pretreatment was 0.0445,while those with alkali treatment and microwave-assisted alkali treatment were 0.0558 and 0.0681 respectively.The esterification efficiency was improved from 57.57% to 88.10% indicating the accessibility of soybean dietary fiber with pretreatment was increased.After the esterification modification,soybean cellulose esters have strong oil removal ability,which can be used in washing products.The oil removal ability of the soybean dietary fiber esters increased with the increase of esterification substitution degree.

关 键 词：豆渣膳食纤维 碱润涨预处理 微波强化 保水值 酯化反应 去污力 

分 类 号：TS214[轻工技术与工程—粮食、油脂及植物蛋白工程]