Sodium Phosphate-Based Surfactants as Fluorine-Free Additives for Enhancing Block Resistance in Acrylic Waterborne Coatings

ACS Applied Engineering Materials Pub Date : 2025-10-23 DOI:10.1021/acsaenm.5c00492

Jiahui Zhao, Bingrui Li, Stan Brownell, Erica A. Frankel, Ray Drumright, Amy Song, Zhongqi Liu, Yutao Sang, Zhihong Nie

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Abstract

Fluorine-free antiblocking agents (ABAs) significantly reduce environmental impact compared to their fluorine-containing counterparts in waterborne coatings. However, existing fluorine-free ABAs often suffer from insufficient antiblocking performance, limiting their practical applications. In this work, we developed two fluorine-free ABAs, SiO-PO4 and Branch-C20-PO4, and incorporated them into acrylic waterborne coatings. The surface properties and block resistance efficiencies of these coatings were systematically characterized. Notably, SiO-PO4 demonstrated exceptional surface activity and achieved effective block resistance even after a 12-day storage period. X-ray Photoelectron Spectroscopy (XPS) analysis revealed that both ABAs migrated to and adsorbed on the coating surface during film formation, reducing cohesive forces generated by polar components and thereby enhancing block resistance. These results position SiO-PO4 as a promising fluorine-free ABA, demonstrating the potential of tailored phosphate-based surfactants to achieve a balance between environmental sustainability and high-performance functionality in waterborne coatings.

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磷酸钠基无氟表面活性剂增强丙烯酸水性涂料抗嵌块性的研究

与水性涂料中的含氟防堵剂相比，无氟防堵剂（ABAs）显著减少了对环境的影响。然而，现有的无氟aba的抗堵塞性能往往不足，限制了其实际应用。在本工作中，我们开发了两种无氟aba， SiO-PO4和Branch-C20-PO4，并将其掺入丙烯酸水性涂料中。系统地表征了这些涂层的表面性能和阻块效率。值得注意的是，SiO-PO4表现出了优异的表面活性，即使在12天的储存期后也能实现有效的阻块性。x射线光电子能谱（XPS）分析表明，在薄膜形成过程中，两种aba都迁移到涂层表面并吸附在涂层表面，从而降低了极性组分产生的凝聚力，从而增强了块阻力。这些结果表明，SiO-PO4是一种很有前途的无氟ABA，显示了定制磷酸盐基表面活性剂在水性涂料中实现环境可持续性和高性能功能之间平衡的潜力。

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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ACS Applied Engineering Materials

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