对于柔性包装聚合物的酸盐添加剂:当前状态审查和未来前景
Mattia Fornaro1, Barbara Liguori1,2, Veronica Ambrogi3
1ACLabs-Applied Chemistry Labs, Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125 Napoli, Italy.
Polymers
|December 17, 2024
概括
泽奥莱特通过改善机械和屏障性能来增强塑料包装. 这种无机添加剂对可生物降解的聚合物具有前景,尽管分散挑战仍然存在.
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
- 纳米技术纳米技术
背景情况:
- 聚乙烯 (PE) 和聚烯 (PP) 在包装中广泛使用,但缺乏环境可持续性.
- 可生物降解的聚合物提供了环保的替代品,但通常具有有限的机械和屏障性能.
- 泽奥利特是具有独特吸附和离子交换能力的无机材料,被探索为聚合物的功能添加剂.
研究的目的:
- 审查使用热利石作为柔性塑料包装中的添加剂的应用.
- 评估热质石对PE,PP和可生物降解聚合物的机械,屏障和抗菌性能的影响.
- 确定在先进的包装材料中使用热石的挑战和机会.
主要方法:
- 对化物修饰的聚合物薄膜研究的文献综述.
- 分析片制备技术和表征方法.
- 对性能增强的评估,包括机械强度,气体屏障,热稳定性和抗菌活性.
主要成果:
- 烯酸添加一般改善气体屏障特性,弹性模块和聚合物薄膜的强度.
- 增强了热稳定性,而破裂时的延长显示了根据聚合物矩阵的不同反应.
- 热质石可以传递抗菌和清理活动,利用它们的阳离子交换和吸附特性.
结论:
- 焦石是增强灵活包装的有前途的添加剂,特别是可生物降解的聚合物.
- 机械和屏障性质的改善,以及潜在的抗菌功能是显著的.
- 需要解决与热酸盐度,分散和矩阵添加剂不兼容性相关的挑战,以获得更广泛的应用.
相关概念视频
Additives and Fillers in Concrete
89
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
The...
89
Plasticizers
65
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
65
Pozzolans
101
Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is...
Fly ash is...
101
Superplasticizers
77
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
77
Ziegler–Natta Chain-Growth Polymerization: Overview
3.2K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.2K


