KH-570 Silane modification for enhanced graphene/silver nanocomposite brush plating: Process optimization and Tribo-corrosion properties

IF 5.7 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem Pub Date : 2025-11-01 Epub Date: 2025-10-22 DOI:10.1016/j.flatc.2025.100957

Shulong Chen , Xijun Wang , Shengxing Wang , Huacheng Wu , Ruina Ma , An Du , Xue Zhao , Yongzhe Fan

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Abstract

The agglomeration of graphene in conventional silver composite plating baths significantly compromises coating homogeneity and performance. This study introduces γ-methacryloxypropyl trimethoxysilane (KH-570) as a silane coupling agent to functionalize graphene, enhancing its dispersion and interfacial adhesion with the silver matrix. Pure silve, unmodified graphene/silver (G/Ag), and KH-570-modified graphene/silver (MG/Ag) coatings were fabricated via brush plating under varying voltages (3 V, 4 V, 5 V). Systematic investigations revealed that the MG/Ag coating exhibited superior microstructural compactness, with 64% higher microhardness (HV 140) and 65% lower wear rate compared to pure Ag. Electrochemical tests in 3.5% NaCl demonstrated a one-order-of-magnitude reduction in corrosion current density (0.086 × 10⁻⁶ A/cm²) for the 4 V MG/Ag coating, alongside a hydrophobic surface (contact angle: 112°) and reduced contact resistance (0.58 μΩ). The optimized voltage of 4 V facilitated refined grain structures, minimized defects, and enhanced graphene dispersion through covalent SiOC bonding. These improvements stem from KH-570's dual role in preventing graphene agglomeration and strengthening the Ag-graphene interface. The MG/Ag coating demonstrates exceptional wear resistance, corrosion inhibition, and electrical stability, positioning it as a robust candidate for high-voltage disconnectors in harsh outdoor environments. The concentration of KH-570 used in this study is analytical reagent (AR). This work provides a scalable, eco-friendly strategy for advancing durable electrical contact materials.

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KH-570增强石墨烯/银纳米复合电刷镀的硅烷改性：工艺优化和摩擦腐蚀性能

石墨烯在传统银复合镀液中的团聚严重影响了镀层的均匀性和性能。本研究引入γ-甲基丙烯氧基丙基三甲氧基硅烷（KH-570）作为硅烷偶联剂对石墨烯进行功能化，增强其与银基体的分散性和界面附着力。在不同电压（3 V、4 V、5 V）下，通过电刷镀制备了纯银、未改性石墨烯/银（G/Ag）和kh -570改性石墨烯/银（MG/Ag）涂层。系统研究表明，MG/Ag涂层具有优异的显微组织致密性，显微硬度（hv140）比纯Ag涂层高64%，磨损率降低65%。在3.5% NaCl中进行的电化学测试表明，4 V MG/Ag涂层的腐蚀电流密度降低了一个数量级（0.086 × 10−6 a /cm2），同时具有疏水表面（接触角为112°）和降低的接触电阻（0.58 μΩ）。优化后的电压为4v有助于细化晶粒结构，减少缺陷，并通过共价SiOC键增强石墨烯的分散性。这些改进源于KH-570在防止石墨烯团聚和强化ag -石墨烯界面方面的双重作用。MG/Ag涂层具有优异的耐磨性、缓蚀性和电气稳定性，使其成为恶劣室外环境下高压隔离器的可靠候选者。本研究使用的KH-570浓度为分析试剂（AR）。这项工作为推进耐用的电接触材料提供了一种可扩展的、环保的策略。

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来源期刊

FlatChem Multiple-

CiteScore

8.40

自引率

6.50%

发文量

104

审稿时长

26 days

期刊介绍： FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)