开发具有抗微生物活性的PLA-PVA/LZ纤维素,并将其应用于即时米的保存
Qian Han1, Shihui Liu1, Xiaoling Huang1
1School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430028, China.
Food chemistry: X
|February 18, 2026
概括
这项研究使用酶 (LZ) 和纤维素制造了一种抗菌,用聚乳酸 (PLA) 增强. 这种新材料有效地抑制了细菌的生长,并延长了米等易腐食品的保质期.
科学领域:
- 生物材料科学 生物材料科学
- 食品科学与技术 食品科学与技术
- 材料工程 材料工程 材料工程
背景情况:
- 食品腐烂是一个重大问题,由微生物污染驱动.
- 开发有效的抗菌材料对于食品的保存和安全至关重要.
- 酶 (LZ) 是一种具有已知的抗菌性能的天然酶,但其应用需要稳定.
研究的目的:
- 开发一种用于食品保存的新型抗菌.
- 使用聚乙烯醇 (PVA) 交叉连接和聚乳酸 (PLA) 强化,在纤维素矩阵内固定酶 (LZ).
- 评估开发的的结构性质,抗菌功效和食品保质期延长能力.
主要方法:
- 通过通过PVA交叉连接在多孔纤维素中固定LZ,用PLA屏障层制造抗菌.
- 介质的结构性质,包括抗拉强度 (TS),水接触角 (WCA) 和吸水.
- 对*黄金葡萄球菌* (*S. aureus*) 和*大肠杆菌* (*E. coli*) 的抗菌活性的评估.
- 对抗菌机制的研究,包括对细菌细胞形态,膜完整性,ATPase活性和性酸酶 (AKP) 水平的影响.
- 评估片在延长米保质期方面的表现.
主要成果:
- 聚乳酸-聚乙烯醇/酶 (PLA-PVA/LZ) 显著改善了结构性质:TS增加了65.52%,WCA增加了78.88%,水吸收减少了87.62%.
- 在最佳的4%的LZ负载下,这些获得了强大的抗菌功效,抑制了*S. aureus*的93.93%和*E. coli*的86.73%.
- 机械学研究表明,片破坏细菌细胞形态,损害膜完整性,抑制ATPase活性,并提高AKP水平.
- 在25°C的米中使用,使微生物数量在检测极限以下维持了48小时,延长了至少12小时的保质期.
结论:
- 开发的PLA-PVA/LZ抗菌具有出色的结构完整性和强大的抗菌活性.
- 该有效地抑制了常见的食源性病原体*S. aureus*和*E. coli*的生长.
- 这种抗菌具有显著的潜力,可以延长易腐烂食品的保质期,例如米,从而减少食物浪费.
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