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Panagiotis G Georgiou¹, Huba L Marton¹, Alexander N Baker¹

¹Department of Chemistry, University of Warwick, Gibbet Hill Road, CV4 7AL Coventry, U.K.

Journal of the American Chemical Society

|May 4, 2021

概括

合成纳米颗粒可以抑制冰的再结晶 (IRI),而不需要冰结合域. 聚合物的尺寸和拥挤,而不是固有的聚合物活性,增强IRI,提供新的冰控制软材料.

科学领域:

材料科学
生物技术
物理化学

背景情况:

冰结合蛋白 (IBPs) 具有重要的控制冰的生物技术潜力.
由于缺乏对IBP机制的理解,因此对合成冰调节材料的合理设计受到阻碍.
目前尚不清楚冰结合域是否对复制IBP的宏观性质至关重要.

研究的目的:

调查合成纳米粒子是否可以独立于固有的聚合物结冰活性来抑制冰的再结晶 (IRI).
探索聚合物大小,拥挤和组装结构在IRI中的作用.
确定这些合成系统中是否观察到冰核活动.

主要方法:

通过聚合诱导自组合 (PISA) 合成纳米粒子.
对各种聚合物冠状体 (PEG,PDMA,PVP) 和核心形成块进行IRI活性选.
不同纳米粒子形态之间的IRI活动比较 (球体与囊泡).
对冰核活动的评估.

主要成果:

具有非结冰聚合物冠状的纳米颗粒显示出显著的IRI.
随着聚合物大小和拥挤,IRI活动增加,这表明这些因素是关键因素.
较大的纳米粒子结构 (囊泡) 比较小的纳米粒子结构 (球) 显示出更高的IRI.
在任何合成材料中都没有检测到冰核活动.

结论:

在合成材料中实现宏观IRI活动时,结合冰的领域并不必不可少.
将聚合物组装成纳米粒子,特别是更大的结构,可以增强IRI.
这种纳米粒子平台为开发控制冰的软材料和理解IRI扩展提供了一种新的方法.

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