生物降解包装基于聚乙烯酒精和碳氧甲基纤维素薄膜与酸结合,用于食品包装应用
Rabia Hussain1, Syeda Ammara Batool1, Aqsa Aizaz1
1Department of Materials Science & Engineering, Institute of Space Technology Islamabad, Islamabad Highway, Islamabad 44000, Pakistan.
ACS omega
|November 29, 2023
概括
研究人员从天然聚合物碳氧甲基纤维素 (CMC) 和聚乙烯醇 (PVA) 与酸 (AA) 开发了可生物降解的塑料薄膜. 60PVA:40CMC:AA薄膜显示出优越的机械强度,生物降解性和食品包装的抗菌性质.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 生物技术是生物技术.
背景情况:
- 基于石油的塑料由于其不可降解的性质,造成环境污染的风险,特别是在食品包装中.
- 包装行业越来越需要可持续和可生物降解的替代品.
研究的目的:
- 通过使用碳甲基纤维素 (CMC),聚乙烯醇 (PVA) 和甲酸 (AA) 合成和表征抗菌和生物降解膜.
- 为了评估具有不同PVA:CMC比率 (60:40和70:30) 的薄膜在潜在的食品包装应用中的性能.
主要方法:
- 通过使用甲 (GA) 合成CMC,PVA和甲酸 (AA) 的交联,合成了片.
- 鉴定包括富里埃变换红外光谱 (FTIR) 用于交叉连接确认,热稳定性分析,土壤埋葬测试降解和抗菌活性测试.
- 此外,还评估了机械性能和水蒸气传递率.
主要成果:
- FTIR证实通过乙烯酸和以太桥梁成功交叉连接.
- 60PVA:40CMC:AA薄膜表现出优越的机械强度,更高的土壤埋葬降解率 (71%在15天),以及较低的水蒸气传递率与70PVA:30CMC:AA薄膜相比.
- 这两种薄膜配方均表现出显著的抗菌活性,对*黄金葡萄球菌*和*大肠杆菌*.
结论:
- 合成的可生物降解薄膜,特别是60PVA:40CMC:AA配方,有望成为食品包装的环保替代品.
- 这些薄膜具有理想的特性,包括生物降解性,机械完整性和抗菌活性.
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