茶多酚/淀粉可食性膜的制备及其性能

刘宏生 冯明月 陈霞

doi:10.3969/j.issn.1000-565X.2018.06.015

华南理工大学学报(自然科学版) >

2018 , Vol. 46 >Issue 6: 109 - 115,136

DOI: https://doi.org/10.3969/j.issn.1000-565X.2018.06.015

食品科学与技术

茶多酚/淀粉可食性膜的制备及其性能

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1．华南理工大学食品科学与工程学院，广东广州 510640;
2．中新国际联合研究院广州知识城，广东广州 510640

刘宏生( 1977-) ，男，副教授，主要从事淀粉功能材料的开发和设计研究．

收稿日期: 2017-09-25

修回日期: 2018-03-01

网络出版日期: 2018-05-07

基金资助

国家自然科学基金资助项目( 31571789) ;国家大学生创新性试验计划项目( 201710561176) ;广东省科技计划项目( A020210009) ;广东大学生科技创新培育专项资金项目( pdjh2017b0034)

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Preparation and Characterization of Starch Functional Film

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1． School of Food Science and Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China; 2． Sino-Singapore International Joint Ｒesearch Institute，Guangzhou Knowledge City，Guangzhou 510640，Guangdong，China

刘宏生( 1977-) ，男，副教授，主要从事淀粉功能材料的开发和设计研究．

Received date: 2017-09-25

Revised date: 2018-03-01

Online published: 2018-05-07

Supported by

Supported by the National Natural Science Foundation of China( 31571789) ， National University Student Innovation Program( 201710561176) ， Science and Technology Planning Project of Guangdong Province( A020210009) and Special Funds for the Cultivation of Guangdong College Students Scientific and Technological Innovation( 2017b0034)

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摘要

采用流延法制备含不同浓度茶多酚的淀粉可食性膜，对其性能进行表征，以期得到具有一定功能活性的薄膜．结果表明: 茶多酚对薄膜的表面结构和水分含量无显著影响; 薄膜透明度和接触角随茶多酚含量增加而显著减小;当茶多酚含量为 5%时，薄膜具有较好的机械性能和较低的水蒸气透过性; 与纯淀粉膜相比，茶多酚/淀粉膜有助于延缓鱼油氧化，可有效抑制金黄色葡萄球菌和大肠杆菌的生长;在抑菌试验中，基于计算机视觉和机器学习技术建立的自动菌落计数技术能够准确、高效地进行菌落计数．

关键词： 淀粉膜; 茶多酚; 抑菌; 抗氧化; 自动计数

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刘宏生冯明月陈霞 . 茶多酚/淀粉可食性膜的制备及其性能[J]. 华南理工大学学报(自然科学版), 2018 , 46(6) : 109 -115,136 . DOI: 10.3969/j.issn.1000-565X.2018.06.015

Abstract

Starch-based films incorporated with different concentration of tea polyphenols ( TP) were developed

with the aid of solution casting method． The physical and functional properties of the films were systematically cha

racterized． The results shows that the TP produces no significant effect on the surface and moisture content of the films，but it reduces the transparency and contact angle． It is also noted that， the mechanical properties and water vapor permeability of the film show no linear changes with the increase of the content of TP． In addition， the presence of TP increases the antioxidant and antimicrobial activity of the starch-based films，and the inhibitory effect is more evident against Staphylococcus aureus． In the antibacterial test，a new automatic counting method based on computer vision and machine learning algorithm is established to count the colonies，which perform much faster

without subjective uncertainty．

Key words： starch film; tea polyphenols; antibacterial; antioxidant; automatic counting

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