基于多功能聚乙烯醇的乙烯酸盐纳米银膜具有UV阻和抗菌性能
Hong Duan1, Ning Zhang1, Lingyan Zheng1
1Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Technology & Business University, Beijing 100048, PR China.
Food chemistry
|February 25, 2025
概括
新的多功能薄膜将聚烯微球 @ 聚多巴胺 / 乙酸盐 / AgNPs (PS@PDA/DEF/Ag) 纳入聚乙醇 (PVA) 中,为食品包装提供增强的紫外线保护和抗菌性能.
科学领域:
- 材料科学 材料科学 材料科学
- 食品科学 食品科学 食品科学
- 纳米技术纳米技术
背景情况:
- 食品腐烂是一个由光线和微生物污染引发的重大问题.
- 开发先进的包装材料对于延长食品的保质期和减少浪费至关重要.
研究的目的:
- 为了合成和描述食品包装应用的新型多功能薄膜.
- 评估开发的薄膜的紫外线阻,热稳定性和抗菌效果.
主要方法:
- 聚乙烯微球 @ 聚多巴胺 / 乙醇酸盐 / AgNPs (PS@PDA/DEF/Ag) 通过铜催化亚酸/酸循环添加 (CuAAC) 和现场减少进行合成.
- 将PS@PDA/DEF/Ag纳入聚乙烯醇 (PVA) 矩阵中,以创建复合膜.
- 使用衍生热重力测量分析 (DTGA),紫外线屏蔽和对大肠杆菌和金黄色杆菌的抗菌活性来评估热稳定性.
主要成果:
- 复合膜 (PS@PDA/DEF/Ag/PVA-4 wt%) 显示出增强的热稳定性,与纯PVA相比,外热峰值从265.3°C增加到334.5°C.
- 在重量超过0.5%的度下,紫外线屏蔽率超过94.0%.
- 观察到显著的抗菌活性,抑制区直径为3.8±0.3毫米对抗大肠杆菌O157:H7和3.2±0.3毫米对抗S. aureus.
结论:
- 开发的PS@PDA/DEF/Ag/PVA薄膜具有出色的紫外线阻和抗菌特性,使其适合用于先进的食品包装.
- 这些多功能薄膜有效地抑制了牛奶中的光氧化,并防止了朱和草的色和腐烂,展示了它们在保护食品质量和延长保质期方面的实际应用.
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