Directional Nanoparticle Migration Driven by Mobility Gradient in Glassy Polymers

IF 5.7 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2026-10-12 DOI:10.1021/acs.macromol.6c02053

Yu Li,Mingshu Yang,Xia Dong,Guoming Liu,Dujin Wang

引用次数: 0

Abstract

How to precisely control the distribution of nanoparticles in a polymer matrix is a long-standing issue in polymer nanocomposites. In this work, we introduce a simple yet effective methodology to generate surface concentration gradients of nanoparticles in polymer films. The underlying mechanism relies on mobility gradients that drive the directional drift motion of nanoparticles. We first demonstrate the working principle using a poly(vinyl butyral)/iron-doped titanium dioxide (PVB/Fe-TiO2) model system, where a mobility gradient is induced by UV irradiation and visualized via fluorescence lifetime imaging microscopy. The generality of this mechanism is further validated in a PVB/silica system. This approach offers a facile and versatile route to design advanced polymer nanocomposites with tailored functional properties.

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玻璃聚合物中迁移率梯度驱动的纳米颗粒定向迁移

如何精确控制纳米颗粒在聚合物基体中的分布是聚合物纳米复合材料研究的一个长期课题。在这项工作中，我们介绍了一种简单而有效的方法来产生纳米颗粒在聚合物薄膜中的表面浓度梯度。潜在的机制依赖于驱动纳米颗粒定向漂移运动的迁移率梯度。我们首先使用聚（乙烯基丁醛）/铁掺杂二氧化钛（PVB/Fe-TiO2）模型系统演示了其工作原理，其中紫外照射诱导迁移率梯度，并通过荧光寿命成像显微镜观察。在PVB/二氧化硅系统中进一步验证了该机理的通用性。这种方法为设计具有定制功能特性的先进聚合物纳米复合材料提供了一种简单而通用的途径。

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

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.