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食品新鲜度指示卡基材玉米淀粉膜的 成膜工艺研究
引用本文:智玲玲,张钦发,冯 卉,刘显威.食品新鲜度指示卡基材玉米淀粉膜的 成膜工艺研究[J].包装学报,2012,4(1):48-52.
作者姓名:智玲玲  张钦发  冯 卉  刘显威
作者单位:华南农业大学食品学院,广东广州,510642
基金项目:华南农业大学校长基金资助项目(5100K05102)
摘    要:以玉米淀粉为原料,添加适量的增强剂和增塑剂,制作了可作为食品新鲜度指示卡基材的玉米淀粉膜。研究了搅拌速度、超声功率、流延方法等工艺条件,对玉米淀粉膜的外观、力学性能和CO2透气性的影响。结果表明:搅拌速度和超声功率变化对淀粉膜的断裂伸长率影响不大,但搅拌速度和超声功率不足或过高都会降低膜的抗拉伸强度和CO2透气性;单层流延膜的CO2透气性能虽比多层流延膜(双层和三层)的稍差,但其表观性能和力学性能均优于多层流延膜的。在搅拌速度为200r/min,超声功率为(40Hz)100W,且采用单层流延成膜条件下,制得的玉米淀粉膜表观性能较好、CO2透气性较大、力学性能较佳,比较符合以CO2为特征气体的食品新鲜度指示卡基材的要求。

关 键 词:玉米淀粉膜  成膜工艺  新鲜度指示卡
收稿时间:2011/12/21 0:00:00

Studies on Processing Conditions of Corn Starch Film Carrier of Food Freshness Indicators
Zhi Lingling,Zhang Qinf,Feng Hui and Liu Xianwei.Studies on Processing Conditions of Corn Starch Film Carrier of Food Freshness Indicators[J].Packaging Journal,2012,4(1):48-52.
Authors:Zhi Lingling  Zhang Qinf  Feng Hui and Liu Xianwei
Affiliation:College of Food Science, South China Agricultural University;College of Food Science, South China Agricultural University;College of Food Science, South China Agricultural University;College of Food Science, South China Agricultural University
Abstract:Corn starch film, with corn starch as raw material and reinforcing agents and plasticizer added in, was prepared for the carrier of food freshness indicators. The influence of film processing conditions (mixing speed, ultrasonic power and tape-casting technique) on the appearance, mechanical properties and CO2 permeability of the film were studied. Results showed that the mixing speed and ultrasonic power had little influence on the breaking elongation, but over or less mixing speed and ultrasonic power can both bring down the CO2 permeability and tensile strength. The single flow delay film h a d b e tt e r a pp e a r a n c e a n d m ec h a n i c a l p r o p e r ti e s t h a n t h e m u lti f l o w d e l a y , a lt h o u g h t h e m u lt i f l o w d e l a y h a d b e tt e r CO 2 permeability. When the film was made with the mixing speed of 200 r/min, ultrasonic power of 100 W (40 Hz) and single flow delay, it had a good appearance, CO2 permeability and mechanical properties, which can meet the requirement of freshness indicators (CO2 as the characteristic gas).
Keywords:corn starch film  film forming technology  freshness indicators (FI)
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