食品科学 ›› 0, Vol. ›› Issue (): 0-0.

• 工艺技术 •    下一篇

淀粉/羧甲基纤维素/花青素指示膜的制备及在鱼肉鲜度指示中的应用

蒋光阳1,侯晓艳2,吴贺君3,黎杉珊2,申光辉2,陈安均1,王章英4,张志清2   

  1. 1. 四川农业大学
    2. 四川农业大学食品学院
    3. 四川农业大学食品学院包装工程系
    4. 广东省农业科学研究院作物研究所
  • 收稿日期:2019-07-15 修回日期:2020-04-20 出版日期:2020-06-25 发布日期:2020-06-22
  • 通讯作者: 张志清 E-mail:zqzhang721@163.com
  • 基金资助:
    广东省应用型科技研发专项

Preparation of indicator films based on carboxymethyl-cellulose /starch and purple sweet potato anthocyanins for monitoring fish freshness

  • Received:2019-07-15 Revised:2020-04-20 Online:2020-06-25 Published:2020-06-22
  • Contact: Zhi-Qing ZHANG E-mail:zqzhang721@163.com

摘要: 以马铃薯淀粉(S),羧甲基纤维素(CMC)为成膜基材,紫薯花青素(PA)作为指示剂制备指示膜。研究马铃薯淀粉和CMC的比例、花青素质量浓度、甘油质量浓度对指示膜性能抗拉伸强度(TS)、断裂伸长率(EAB)、水溶性(WS)、颜色(a值)的影响,将指示膜的性能综合分作为响应值,采用响应面法优化制备工艺参数,并对最优指示膜进行表征。结果表明当马铃薯淀粉和CMC质量比6:4,花青素质量浓度为0.5%,甘油质量浓度为0.6%,可得指示膜的综合得分为63.8,此时对应的TS为21.48±0.12 MPa,EAB为28.88±0.08%,WS为19.24±0.21%,a为4.95±0.02。通过FT-IR、XRD和SEM分析各组分之间相容性好,截面平整光滑。将指示膜用于监测草鱼新鲜度,鱼肉的TVB-N值,pH以及菌落总数分别达到21.55 mg/100g,7.58,7.3 lg CFU/g时,此时指示膜由红色变为蓝紫色。研究结果可为指示膜用于食品货架期指示应用提供参考。

关键词: 指示膜, 马铃薯淀粉, 羧甲基纤维素, 紫薯花青素, 性能优化, 结构表征

Abstract: Indicator films were prepared through using starch (S) and carboxymethyl cellulose (CMC) as film forming material, purple sweet potato anthocyanins (PA) were used as the indicator. The effects of S and CMC ratio, anthocyanin concentration and glycerol concentration on the physical properties such as tensile strength (TS), elongation at break (EAB), water soluble (WS) and color (a) had been investigated. The comprehensive score of indicator film performance is used as the response value, the process parameters were optimized by the response surface method, and the optimal indicator film was characterized. The results demonstrated that the optimum formula of indicator films were starch and CMC ratio of 6:4, anthocyanin concentration of 0.5%, glycerol concentration of 0.6%. The score of indicator films were the best overall as high as 63.8 under these optimal conditions, and the properties of indicator films showed tensile strength of (21.48±0.12) MPa, elongation at break of (28.88±0.08)%, water soluble of (19.24±0.21)%, color of (4.95±0.02). Results of FT-IR, XRD and SEM indicated that the cross section of the SCA film was smooth and good compatibility of the ingredients. Furthermore, the indicator film was used to monitor the freshness of the grass carp. The total volatile basic nitrogen (TVB-N) value, pH and the total viable count reached at 21.55 mg/100g, 7.58,7.3 lg CFU/g, respectively. And simultaneously the indicator film changed from red to blue-violet. The research results can provide reference for the use of indicator films for food shelf life judgment applications.

Key words: indicator film, potato starch, carboxymethyl cellulose, purple sweet potato anthocyanins, properties optimization, structure characterization

中图分类号: