Tailored design of well-defined comb-like copolymer dispersants for enhanced dispersion and stability of cerium oxide nanoparticle suspensions

IF 2.7 3区 化学 Q2 POLYMER SCIENCE Journal of Applied Polymer Science Pub Date : 2024-09-04 DOI:10.1002/app.56243
Jinlin Man, Xinyue Guan, Guanshao Huang, Junjie Zhou, Han Miao, Xinxin Li
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Abstract

The development of effective dispersants for nanoparticle suspensions is crucial for enhancing the performance and stability of various functional materials. In this study, we investigated a series of comb-like block copolymers with well-defined structures, including both categories of block copolymers and uniformly composed random copolymers, as dispersants for cerium oxide (CeO2) suspensions. Acrylic acid (AA) units were used for anchoring and electrostatic repulsion, while methoxy polyethylene glycol acrylate (MPEGA) units provided additional steric hindrance and solubility. We explored stabilization mechanisms involving polymer topologies, chain lengths, compositions, and molecular interactions from kinetic and thermodynamic perspectives. The results demonstrate significant improvements in dispersion stability with both categories of well-controlled copolymers, especially with uniformly composed random copolymers due to their uniformly distributed multi-point anchoring and balanced electrostatic and steric stabilization. This research not only enhances the fundamental understanding of polymer-nanoparticle interactions and polymer dispersants, but also provides valuable guidance for the tailored design of dispersants for specific industrial and scientific needs.

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量身设计定义明确的梳状共聚物分散剂,提高纳米氧化铈悬浮液的分散性和稳定性
为纳米颗粒悬浮液开发有效的分散剂对于提高各种功能材料的性能和稳定性至关重要。在本研究中,我们研究了一系列具有明确结构的梳状嵌段共聚物,包括嵌段共聚物和均匀组成的无规共聚物两类,作为氧化铈(CeO2)悬浮液的分散剂。丙烯酸(AA)单元用于锚定和静电排斥,而甲氧基聚乙二醇丙烯酸酯(MPEGA)单元则提供额外的立体阻碍和溶解性。我们从动力学和热力学角度探讨了涉及聚合物拓扑结构、链长、组成和分子相互作用的稳定机制。结果表明,这两类控制良好的共聚物的分散稳定性都有明显改善,尤其是均匀组成的无规共聚物,因为它们具有均匀分布的多点锚定以及平衡的静电和立体稳定作用。这项研究不仅加深了人们对聚合物-纳米粒子相互作用和聚合物分散剂的基本了解,还为针对特定工业和科学需求量身定制分散剂的设计提供了宝贵的指导。
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来源期刊
Journal of Applied Polymer Science
Journal of Applied Polymer Science 化学-高分子科学
CiteScore
5.70
自引率
10.00%
发文量
1280
审稿时长
2.7 months
期刊介绍: The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.
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