Mechanical properties and antibacterial activities of novel starch-based composite films incorporated with salicylic acid
Mechanical properties and antibacterial activities of novel starch-based composite films incorporated with salicylic acid
复制标题
水杨酸新型淀粉基复合膜的机械性能和抗菌活性
DOI：
10.1016/j.ijbiomac.2019.11.110
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发表时间：
2020-07-15
影响因子：
8.2
通讯作者：
Cui, Bo
中科院分区：
文献类型：
--
作者：
Fang, Yishan;Fu, Jianxin;Cui, Bo
为了控制食品污染，满足人们对高品质食品日益增长的需求，本文研制了一种新型的、性能优良的淀粉复合薄膜作为包装材料，该薄膜具有优化的物理、机械性能和抗菌活性。以水杨酸（SA）和糯玉米淀粉纳米颗粒/卡拉胶（WMSNs/KC）为复合材料，制备了具有抗菌活性和提高力学性能的淀粉基复合膜。采用酶解法和重结晶法制备WMSNs，分别加入KC自组装形成WMSNs/KC，并作为纳米填料和稳定剂掺入浓度为0-9%的羟丙基木薯淀粉基膜中。宏观形貌和扫描电镜表征表明，WMSNs/KC淀粉复合膜光滑、均匀、透明。x射线衍射图和热重分析也显示出薄膜、WMSNs/KC和SA之间形成氢键等强相互作用。与纯淀粉基膜相比，添加WMSNs/KC增强的复合膜的抗拉强度、水蒸气阻隔性和热稳定性显著提高，但透明度和断裂伸长率略有下降。此外，淀粉复合膜对大肠杆菌、金黄色葡萄球菌和枯草芽孢杆菌这三种典型的食品中不需要的微生物具有良好的抗菌活性。(C) 2019 Elsevier B.V.版权所有
To control food contamination and meet the growing demand for high quality food, a novel and excellent starch composite film as packing material with optimized physical, mechanical properties and antimicrobial activity was produced in this paper. Starch-based composite films incorporated with salicylic acid (SA) and waxy maize starch nanoparticles/kappa-carrageenan(WMSNs/KC) were used to achieve antimicrobial activity and improve the mechanical properties. WMSNs were fabricated through enzymolysis and recrystallisation method, followed by individually adding KC to form WMSNs/KC by self-assembly, and used as a nanofiller and stabilizer to be incorporated into hydroxypropyl tapioca starch-based films at a concentration of 0-9%. Characterization of macromorphology and scanning electron microscope indicated the starch composite films with WMSNs/KC were smooth, uniform, and transparent. X-ray diffraction pattern and Thermogravimetric analysis also showed strong interactions such as hydrogen bond formation among films, WMSNs/KC and SA. Compared with the pure starch-based films, the composite films reinforced by the addition of WMSNs/KC significantly increased the tensile strength, water vapor barrier and thermal stability, while the transparency and elongation at break decreased slightly. Moreover, the starch composite films showed excellent antimicrobial activity for three typical undesired microorganisms in foods, Escherichia coli, Staphylococcus aureus, and Bacillus subtilis. (C) 2019 Elsevier B.V. All rights reserved.