Scalable manufacturing of layered nanoparticle-polymer composite films through evaporative assembly

IF 4.7 3区材料科学 Q2 CHEMISTRY, PHYSICAL

Colloid and Interface Science Communications Pub Date : 2025-04-18 DOI:10.1016/j.colcom.2025.100837

Shaveen Fernando, Surita R. Bhatia

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Abstract

This work explores stratification, a prescribed spatial variation of components in a multi-component film, in particle-polymer films prepared by a single-step evaporative drying technique. Our overall goal is to develop a more efficient and cost-effective way to create vertically structured multi-component polymer and colloid films. Films containing poly(acrylic acid) (PAA) chains and polystyrene (PS) colloidal nanoparticles were analyzed using microbeam small-angle X-ray scattering (SAXS) and atomic force microscopy (AFM) to probe the impact of evaporation rates and colloid sizes on stratification behavior. Under slow drying conditions, particle-on-top stratification was observed, consistent with a diffusive model of stratification behavior. Conversely, moderate evaporation rates resulted in non-stratified configurations for certain mixtures. Fast evaporation, achieved by drying at elevated temperatures, induced polymer-on-top stratification, which aligns with predictions from simulations. Overall, this study proposes a more efficient method for creating vertically structured films, with implications for various industries.

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通过蒸发装配大规模制造层状纳米粒子-聚合物复合薄膜

这项工作探讨了分层，多组分薄膜中组分的规定空间变化，在单步蒸发干燥技术制备的颗粒聚合物薄膜中。我们的总体目标是开发一种更有效和更具成本效益的方法来制造垂直结构的多组分聚合物和胶体薄膜。采用微束小角x射线散射（SAXS）和原子力显微镜（AFM）对含有聚丙烯酸（PAA）链和聚苯乙烯（PS）胶体纳米粒子的薄膜进行了分析，探讨了蒸发速率和胶体尺寸对分层行为的影响。在缓慢干燥条件下，观察到颗粒顶部分层，符合分层行为的扩散模型。相反，适度的蒸发速率导致某些混合物的非分层结构。通过高温干燥实现的快速蒸发，导致聚合物在顶部分层，这与模拟的预测一致。总的来说，本研究提出了一种更有效的方法来制作垂直结构的电影，对各个行业都有意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Colloid and Interface Science Communications Materials Science-Materials Chemistry

CiteScore

9.40

自引率

6.70%

发文量

125

审稿时长

43 days

期刊介绍： Colloid and Interface Science Communications provides a forum for the highest visibility and rapid publication of short initial reports on new fundamental concepts, research findings, and topical applications at the forefront of the increasingly interdisciplinary area of colloid and interface science.