单体抑制使超和同聚合物膨胀的囊能够在玻璃陷后具有长期稳定性
Eric R Williams1, Christian X Ruff1, Morgan Stefik1
1Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208. morgan@stefikgroup.com.
Soft matter
|February 15, 2024
概括
研究人员开发了一种新方法,使用非平衡过程创建稳定,精确尺寸的粒. 这种技术可以实现可调节的微粒大小 (40-130纳米),具有长期稳定性,克服了传统膨胀剂的局限性.
科学领域:
- 聚合物科学 聚合物科学
- 材料化学 材料化学
- 纳米技术纳米技术
背景情况:
- 微粒尺寸对于应用来说至关重要,但实现稳定,可调节的尺寸是具有挑战性的.
- 由于动态再平衡,现有的菌膨胀剂提供有限的稳定性.
研究的目的:
- 为了研究一种非平衡处理序列,以创建稳定的,可调整大小的微粒.
- 探索单聚合物度和溶剂选择性对菌形成和稳定性的影响.
主要方法:
- 使用了动态光散射 (DLS),小角度X射线散射 (SAXS) 和传输电子显微镜 (TEM).
- 采用一种将超和同聚合物膨胀与玻璃核 (持久) 结合的工艺.
- 分析了由unimer度和溶剂选择性影响的路径依赖形成.
主要成果:
- 实现了可调节的小细胞核大小,大约在40-130nm之间,超过了以前的平衡方法.
- 经过随后的核心玻璃化,经过长期证明的大小持久性 (超过6个月).
- 观察到微粒直径和同聚合物添加之间的线性相关性,与界面面积变化有关.
结论:
- 一个新的非平衡途径使得持续的,大小受控的微粒的产生成为可能.
- 溶剂选择性对于实现超和同聚合物加载和避免沉至关重要.
- 这种方法在控制各种应用的微粒尺寸方面提供了显著的进步.
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