硫酸盐基双块共聚物纳米颗粒在石中的封闭:变化阴离子稳定剂链的表面密度的影响
Yin Ning1, Lee A Fielding1,2, Liam P D Ratcliffe1
1Department of Chemistry, University of Sheffield , Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
Journal of the American Chemical Society
|August 11, 2016
概括
聚合诱导的自我组装 (PISA) 产生有机纳米粒子. 控制这些纳米颗粒的稳定剂密度决定了它们的纳入石晶体,揭示了有效封闭的最佳密度.
科学领域:
- 材料化学
- 聚合物科学
- 纳米技术
背景情况:
- 聚合诱导自组合 (PISA) 是创造有机纳米粒子的一种多功能方法.
- 控制纳米粒子表面特性对于它们的应用至关重要.
研究的目的:
- 研究聚二硫乙烯甲酸-聚甲酸 (PSEM-PBzMA) 纳米颗粒稳定剂表面密度对石封闭的影响.
- 建立纳米粒子在无机晶体中的设计规则.
主要方法:
- 使用RAFT分散聚合和RAFT水性乳液聚合合成具有不同PSEM稳定剂表面密度的PSEM- PBzMA纳米颗粒.
- 这些阴离子纳米颗粒被量化为酸盐 (CaCO3) 主体模型晶体.
主要成果:
- 具有低PSEM稳定剂表面密度的纳米颗粒呈现出均的化成石 (重量高达7.5%).
- 具有高PSEM稳定剂表面密度的纳米颗粒显示出最小的遮.
- 有效的纳米粒子封闭需要一个最佳的离子表面密度.
结论:
- 这项研究表明纳米颗粒表面密度和遮蔽效率之间存在反直觉的关系.
- 这一发现为控制无机矩阵中的纳米粒子结合提供了一个新的设计原理.
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