解开复杂的纳米粒子吸附到聚合物乳在皮克林乳液聚合物的复杂性
Zekai Shen1, Tianheng Wang1, Jing Luo1
1Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122 Jiangsu, China.
Langmuir : the ACS journal of surfaces and colloids
|August 19, 2024
概括
这项研究探讨了通过皮克林乳液聚合方式将未经修改的二氧化纳米颗粒纳入聚合物乳中. 关键的发现表明离子对纳米粒子吸附至关重要,影响用于涂层应用的混合乳形成.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 通过皮克林乳液聚合制造未经修改的二氧化纳米颗粒制造水性聚合物分散面临挑战,特别是离子系统.
- 负电荷的纳米粒子在聚合物乳上吸附通常需要阴离子启动剂或辅助单体,限制直接结合.
研究的目的:
- 在皮克林乳液聚合过程中研究影响未经修改的纳米颗粒吸附的实验参数.
- 阐明影响成功制造聚甲酸/ (PMMA/SiO2) 混合乳的因素.
主要方法:
- 研究了乳液聚合温度,单体溶解度,盐度和阴离子类型的影响.
- 在不同的条件下分析了纳米粒子加载率,包括pH值,温度和单体成分 (甲基甲酸盐和烯).
主要成果:
- 在pH 5-6和温度≤65°C时形成的PMMA/SiO2混合乳;较高的温度减少了含量.
- 由于其水溶性较低,添加烯 (高达10%重量%) 降低了二氧化负载.
- 离子 (Na+) 对于二氧化纳米颗粒的吸附和稳定所产生的混合乳至关重要.
结论:
- 皮克林乳液聚合物中的纳米粒子负载是复杂的,受到温度,单体溶解度和特定离子的影响.
- 离子的存在对于在PMMA乳上有效吸附纳米粒子至关重要.
- 研究结果为涂料行业开发含有增强纳米粒子含量的水性聚合物分散提供了洞察力.
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