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绿色和可再生热塑性聚乙烯醇/粉混合薄膜是通过化加工制造的
Na Ma1, Wei Dong2, Dongxin Qin1
1School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, China.
International journal of biological macromolecules
|September 5, 2024
概括
聚乙醇 (PVA) /粉混合薄膜提供增强的机械强度和水友性. 7:3的PVA/粉比显示出作为可重复使用,可再生和环保包装材料的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 可持续材料 可持续材料
背景情况:
- 聚乙醇 (PVA) 是一种多功能合成聚合物,具有良好的薄膜形成特性.
- 粉是一种可生物降解和可再生的多糖,具有作为聚合物混合物的填充剂或成分的潜力.
- 开发可持续和高性能包装材料对于减少环境影响至关重要.
研究的目的:
- 通过干混合方法研究PVA/粉混合膜的制备和性能.
- 评估粉含量对PVA薄膜的微观结构,机械性能和水友性的影响.
- 确定用于包装应用的PVA/粉混合物的最佳成分.
主要方法:
- 通过干混合技术制备PVA/粉混合膜.
- 进行了微结构分析,观察PVA矩阵内的粉分布.
- 进行了机械测试 (拉力强度,弹性模量) 和吸水测试.
- 分析了热性能 (Tmax),以评估热稳定性.
主要成果:
- 粉在连续PVA矩阵中的颗粒状结构中被观察到.
- 与纯PVA相比,粉含量为30 wt%显著提高了拉伸强度 (14.7 MPa) 和弹性模量 (20.5 MPa).
- 吸水率增加了约2%,热稳定性 (Tmax) 提高了8.129.64°C,添加了粉.
- 在7:3比率的PVA/粉混合物表现出优异的机械,水友和光学性能.
结论:
- 7:3的PVA/粉混合物表现出优良的机械性能,增强的水友性和更好的热稳定性.
- 这些混合膜是可重复使用和可再生的,突出了它们作为可持续包装替代品的潜力.
- 聚乙烯/粉混合膜是包装应用中一个有希望的环保材料.
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