A versatile method for facile and reliable synthesis of colloidal particles with a size and composition gradient

IF 2.2 4区 化学 Q3 CHEMISTRY, PHYSICAL Colloid and Polymer Science Pub Date : 2024-07-08 DOI:10.1007/s00396-024-05282-7
Alexander Berger, Maximilian Theis, Henrike von Wedel, Tamino Rößler, Georg Papastavrou, Jürgen Senker, Markus Retsch
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Abstract

Colloidal particles play a pivotal role in numerous applications across various disciplines, many of which necessitate precise control over particle size and size distribution. Seeded growth reactions have been established as effective methods for reproducibly accessing tailor-made particles. However, conventional batch-wise syntheses only yield discrete particle sizes. With the increasing focus on complex structures in current research, there is a demand for innovative and adaptable techniques to produce colloidal particles with precise sizes and size distributions. The Controlled Emulsion Extraction Process (CrEEP) is capable of addressing this challenge. Here, we present in detail how this synthesis works and demonstrate its reliability and versatility. Our approach exploits the time-dependent particle growth and enables accessing dispersions of controlled particle size distributions. We highlight these possibilities through a variation of the monomer feed and feed composition, resulting in gradual changes in both size and glass transition temperature, respectively. Beyond its application to polymer particles, CrEEP can be seamlessly extended to other seeded-growth mechanisms, such as the silica Stöber synthesis. Consequently, the Controlled Extraction Stöber Process (CrESP) similarly yields a size gradient, showcasing the generality of this synthetic advancement.

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便捷可靠地合成具有尺寸和成分梯度的胶体颗粒的多功能方法
摘要胶体粒子在各学科的众多应用中发挥着关键作用,其中许多应用都需要精确控制粒度和粒度分布。种子生长反应已成为可重复获得定制颗粒的有效方法。然而,传统的批量合成只能获得离散的颗粒尺寸。目前的研究越来越关注复杂结构,因此需要创新和适应性强的技术来生产具有精确尺寸和尺寸分布的胶体粒子。可控乳液萃取工艺(CrEEP)能够应对这一挑战。在此,我们将详细介绍这种合成方法的工作原理,并展示其可靠性和多功能性。我们的方法利用了随时间变化的颗粒生长,并能获得粒度分布可控的分散体。我们通过改变单体进料和进料成分,使粒度和玻璃化转变温度分别发生渐变,从而突出了这些可能性。除了应用于聚合物颗粒之外,CrEEP 还可以无缝扩展到其他种子生长机制,如二氧化硅斯托伯合成。因此,受控萃取斯托伯工艺(CrESP)也能产生类似的尺寸梯度,从而展示了这一合成技术进步的通用性。
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来源期刊
Colloid and Polymer Science
Colloid and Polymer Science 化学-高分子科学
CiteScore
4.60
自引率
4.20%
发文量
111
审稿时长
2.2 months
期刊介绍: Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.
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