几种增塑剂与乳化剂对魔芋葡甘聚糖／乙基纤维素共混膜机械性质的影响  

Effects of plasticizers and emulsifiers on mechanical properties of konjac glucomannan / ethyl cellulose blend films

作　　者：朱芊[1] 肖满[1] 陈茜[1] 姜发堂[1] 严文莉[1] 

机构地区：[1]湖北工业大学,生物工程与食品学院,湖北武汉430068

出　　处：《食品工业科技》2016年第22期320-323,335,共5页Science and Technology of Food Industry

基　　金：国家自然科学基金(31271832,31301428)

摘　　要：本文研究不同增塑剂或乳化剂的添加对魔芋葡甘聚糖／乙基纤维素复合膜（KE）机械性质的影响及其作用机理。结果表明，随着不同种类的增塑剂（癸二酸二丁酯、环氧大豆油、柠檬酸三乙酯）添加量的增加（5％-35％，w／w），复合膜的拉伸强度表现为先升高后降低（P〈0．05），而断裂伸长率呈现先降低后回升的趋势。乳化剂的添加（0．1％-0．9％，w／w）对于复合膜的拉伸强度不会产生显著影响，但其含量的增加会导致断裂仲长率先升高后降低（P〈0．05）。癸二酸二丁酯添加量为20％时复合膜拉伸强度达到最大82．37MPa。乳化剂司盘80添加量为0．7％时，断裂伸长率达到最大19．78％。基于以上结果．对增塑剂与乳化剂在KE膜上的作用机理进行了猜想并建立了假设模型。The impacts of the addition of different plasticizers and emulsifiers on mechanical properties of konjac glucomannan/ethyl cellulose（ KE） blend films,and the mechanisms were mainly investigated in this study.Results indicated that the film had a first increase and later a decrease on tensile strength （TS） （p 〈 0.05）, and a first decrease but later increase trend on elongation ratio at breaking（EAB） ,with increased addition（5%-35% ,w/w） of plasticizers （ dibutyl sebacate, epoxidized soybean oil, and triethyl citrate）. The addition （ 0.1% - 0.9%, w/w） of emulsifiers（span 80,sucrose fatty acid ester,and Tween 80）did not show significant impact on TS of KE film, but would lead to a first increase and later a decrease on EAB（ p 〈0.05）.The TS of the blend film reached to 82.37 MPa when 20% dibutyl sebacate was addicted,as the EAB reached to 19.78% when 0.？% span 80 was addicted.Based on these results,a hypothesis model was proposed and an assumption of the mechanisms of plasticizers＇ and emulsifiers＇ impact on KE film was made.

关 键 词：复合膜 增塑剂 乳化剂 拉伸强度 断裂伸长率 

分 类 号：TS206.4[轻工技术与工程—食品科学]