化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (1) : 163-169. DOI: 10.19817/j.cnki.issn1006-3536.2025.01.008

科学研究

EP/PDMS/MMT-SiO₂-STAB超疏水复合涂层的制备及其性能研究

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Preparation and performance study of EP/PDMS/MMT-SiO₂-STAB superhydrophobic composite coating

Wang Jie¹, Li Meng¹, Xie Zonghong², Zhao Xin¹, Xiang Jialin¹

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Received		Published
2023-11-23		2025-01-20
Issue Date	Revised Date
2025-01-17	2023-11-23

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摘要

采用溶胶-凝胶法在钠基蒙脱土(MMT)表面原位生长具有良好内部界面力的SiO₂,得到MMT接枝SiO₂(记作MMT-SiO₂颗粒),以十八烷基三甲基溴化(STAB)阳离子型改性剂对MMT-SiO₂颗粒进行插层疏水改性,得到改性MMT接枝SiO₂(记作MMT-SiO₂-STAB复合颗粒)。以MMT-SiO₂-STAB复合颗粒为增强相,聚二甲基硅氧烷改性环氧树脂(EP/PDMS)为基体,制备了EP/PDMS//MMT-SiO₂-STAB复合涂层。通过扫描电子显微镜、X射线衍射仪、傅里叶变换红外光谱仪、接触角仪对复合涂层的形貌、结构、接触角进行分析和测试。结果表明,STAB与MMT-SiO₂发生离子交换反应后附着在MMT端面,随着STAB用量的增加,MMT的层间距呈现先增大后减小的趋势。MMT-SiO₂-STAB中MMT的层间距越大,增强相与树脂之间的相容性越好,可有效改善增强相在基体中的分散稳定性以及复合涂层的耐磨损性能。制备的复合涂层接触角为(153.7±1.2)°,滚动角达到(8.9±0.6)°,超疏水特征明显。

Abstract

Using the sol-gel method,SiO₂ with good internal interfacial force was in-situ grown on the surface of sodium montmorillonite (MMT) to obtain MMT-grafted SiO₂ (referred to as MMT-SiO₂ particles).The MMT-SiO₂ particles were then subjected to intercalation hydrophobic modification using trimethyloctadecylammonium bromide (STAB),a cationic modifier,to obtain modified MMT-grafted SiO₂ (referred to as MMT-SiO₂-STAB composite particles).The MMT-SiO₂-STAB composite particles were used as a reinforcing phase,and polydimethylsiloxane-modified epoxy resin (EP/PDMS) was used as the matrix to prepare the EP/PDMS/MMT-SiO₂-STAB composite coating.The morphology,structure,and contact angle of the composite coating were analyzed and tested by scanning electron microscopy (SEM),X-ray diffraction (XRD),Fourier transform infrared spectroscopy (FT-IR),and contact angle goniometer.The results showed that after the ion exchange reaction between STAB and MMT-SiO₂,STAB adhered to the edges of MMT.As the amount of STAB increased,the interlayer spacing of MMT first increased and then decreased.The larger the interlayer spacing of MMT in MMT-SiO₂-STAB,the better the compatibility between the reinforcing phase and the resin,effectively improving the dispersion stability of the reinforcing phase in the matrix and the wear resistance of the composite coating.The prepared composite coating exhibited a contact angle of (153.7±1.2)° and a rolling angle of (8.9±0.6)°,indicating significant superhydrophobic characteristics.

关键词

超疏水 / 蒙脱土 / 二氧化硅 / 复合涂层

Key words

superhydrophobic / montmorillonite / silica / composite coating

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EP/PDMS/MMT-SiO₂-STAB超疏水复合涂层的制备及其性能研究[J]. 化工新型材料, 2025, 53(1): 163-169 DOI:10.19817/j.cnki.issn1006-3536.2025.01.008

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