Preparation of lychee-like melamine–formaldehyde/SiO2 composite microspheres and their application in light diffusers

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-05-29 DOI:10.1016/j.apsusc.2025.163677

Jing Hu, Zhihao Zong, Mengyao Hu, Xubao Jiang, Chunsheng Li, Anhou Xu

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Abstract

This study presents a novel method for synthesizing lychee-like melamine–formaldehyde/SiO₂ (MS) composite microspheres via precipitation polymerization under conditions without dispersant and organic solvents. By optimizing the morphology and loading of SiO₂ nanoparticles and reactant concentrations, monodisperse MS microspheres with controlled sizes and hierarchical surface structures were achieved. The branched-chain SiO₂ exhibited superior adsorption capacity, yielding smaller and more uniform microspheres compared to spherical SiO₂. Thermal analysis confirmed excellent stability (>95 % mass retention at ∼ 390°C), meeting requirements for optical material processing. As light diffusers, MS microspheres demonstrated exceptional performance, showing a high haze of 96.38 % while maintaining stable transmittance (>80 %). The integration of dual-scale scattering (Mie and Rayleigh) and refractive index contrast between MF and PMMA enhanced light diffusion efficiency. This work provides a scalable, eco-friendly strategy for designing high-performance optical materials with balanced haze and transmittance.

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荔枝状三聚氰胺-甲醛/SiO2复合微球的制备及其在光扩散器中的应用

在无分散剂和有机溶剂的条件下，采用沉淀聚合法制备了类荔枝三聚氰胺-甲醛/SiO2 （MS）复合微球。通过优化SiO2纳米颗粒的形貌、负载和反应物浓度，制备了粒径可控、表面结构分层的单分散质谱微球。支链SiO2表现出较好的吸附能力，生成的微球比球形SiO2更小、更均匀。热分析证实了优异的稳定性（在 ~ 390°C时质量保持率>；95 %），满足光学材料加工的要求。作为光扩散剂，MS微球表现出优异的性能，在保持稳定的透过率（>80 %）的同时，显示出96.38 %的高雾度。双尺度散射（Mie和Rayleigh）的积分以及MF和PMMA之间的折射率对比提高了光扩散效率。这项工作为设计具有平衡雾度和透光率的高性能光学材料提供了一种可扩展的、环保的策略。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.