Preparation and performance of waterborne polyurethane composite coatings for electromagnetic interference shielding

IF 2.3 4区材料科学 Q2 CHEMISTRY, APPLIED

Journal of Coatings Technology and Research Pub Date : 2025-01-31 DOI:10.1007/s11998-024-01033-z

Yue Zhang, Zhengxun Liu, Yunhua Han, Shiyang Zhu, Jiaqi Zhuo, Yizeng Di, Xihao Ling, Hongyan Yao, Shaowei Guan

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引用次数: 0

Abstract

The increasing severity of electromagnetic pollution has prompted the development of various conductive polymer composite materials for electromagnetic protection in recent years. However, research specifically focused on conductive polymer composite coatings remains limited. In this study, we prepared two types of conductive coatings, which are designated as UP and UC coatings, using waterborne polyurethane (WPU) combined with polyaniline (PANI) or multi-walled carbon nanotubes (MWCNT) through a standard preparation method involving paint formulation and air spraying. We conducted a thorough evaluation and comparison of the performance of these coatings. Both UP and UC coatings exhibited commendable mechanical properties, including adhesion, impact strength, and hardness. Notably, the UC coatings demonstrated higher conductivity and electromagnetic interference (EMI) shielding capabilities compared to the UP coatings. Specifically, the UP-20 coating achieved a high conductivity of 97.79 S m⁻¹, a moderate total shielding effectiveness (SE_T) of 7.47 dB, and an impressive specific shielding effectiveness (SSE) of 983.7 dB cm² g⁻¹ at 8.2 GHz. Overall, the UP coatings show significant potential and advantages for everyday applications in electromagnetic protection.

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电磁干扰屏蔽水性聚氨酯复合涂料的制备及性能研究

近年来，随着电磁污染的日益严重，各种用于电磁防护的导电高分子复合材料得到了发展。然而，专门针对导电聚合物复合涂层的研究仍然有限。在本研究中，我们采用水性聚氨酯（WPU）与聚苯胺（PANI）结合或多壁碳纳米管（MWCNT），通过涂料配方和空气喷涂的标准制备方法，制备了两种导电涂料，分别为UP和UC涂料。我们对这些涂料的性能进行了全面的评估和比较。UP和UC涂层均表现出良好的机械性能，包括附着力、冲击强度和硬度。值得注意的是，与UP涂层相比，UC涂层表现出更高的导电性和电磁干扰（EMI）屏蔽能力。具体来说，UP-20涂层获得了97.79 S m−1的高电导率，7.47 dB的中等总屏蔽效率（SET），以及令人印象深刻的983.7 dB cm2 g−1的比屏蔽效率（SSE）。总的来说，UP涂层在电磁保护的日常应用中显示出巨大的潜力和优势。

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来源期刊

Journal of Coatings Technology and Research 工程技术-材料科学：膜

CiteScore

4.30

自引率

8.70%

发文量

130

审稿时长

2.5 months

期刊介绍： Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.