以不同比例的正硅酸甲酯(TMOS)和1H,1H,2H,2H-全氟癸基三甲氧基硅烷(FAS-17)为原料,以盐酸为催化剂,采用一步法制备了类液态有机硅溶胶,通过旋涂法将其涂覆在铜合金表面并在60℃条件下烘干成膜。通过红外光谱、场发射扫描电子显微镜、接触角测量以及电化学性能测试、中性盐雾试验对类液态有机硅涂层的官能团、微观形貌、疏水滑动性及耐蚀性进行分析和研究。结果表明,当TMOS与FAS-17物质的量比达到4∶1时,涂层静态接触角为106.8°,滑动角为25.7°,自腐蚀电流密度为5.38×10-8A/cm2,频率0.01Hz处电化学交流阻抗为2.73×105Ω·cm2,涂层防护效率达到99.41%,涂层具有最佳的防腐蚀性能、疏水性和水滑动性能。中性盐雾测试中,样品TF-4在10d内未出现腐蚀,在第25d基底出现少量腐蚀斑点,具有最佳的抗盐雾性能。涂覆类液态有机硅涂层的玻璃片可见光透过率超过91%。
Using different ratios of tetramethyl orthosilicate (TMOS) and 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (FAS-17) as raw materials and hydrochloric acid as a catalyst,liquid-like organosilicon sol was prepared by one-step method.This sol was coated on the surface of copper alloy by spinning coating method,and then dried at 60℃ to form a film.Various techniques,including infrared spectroscopy,field emission scanning electron microscopy,contact angle measurement,electrochemical performance tests,and neutral salt spray tests,were used to investigate the functional groups,microstructure characteristics,water repellency,sliding properties and corrosion resistance of the liquid-like organosilicon coatings.When the ratio of TMOS to FAS-17 reached 4∶1,the static contact angle was 106.8°,the sliding angle was 25.7°,the self-corrosion current density was 5.38×10-8A/cm2,and the impedance at the frequency of 0.01Hz was 2.73×105Ω·cm2.The protection efficiency reached 99.41%,demonstrating optimal corrosion resistance,hydrophobicity and water sliding properties.In neutral salt spray test,the TF-4 showed no corrosion within 10 days and only a small amount of corrosion spots on the substrate on the 25th day,which had the best salt spray resistance.The visible light transmittance of glass sheet coated with the liquid-like organosilicon coating exceeded 91%.
[1] Yamamoto R,Kowalski D,Zhu R,et al.Fabrication of superhydrophobic copper metal nanowire surfaces with high thermal conductivity[J].Applied Surface Science,2021,537:147854.
[2] Abd El-Lateef H M,Gouda M.Novel nanocomposites of nickel and copper oxide nanoparticles embedded in a melamine framework containing cellulose nanocrystals:material features and corrosion protection applications[J].Journal of Molecular Liquids,2021,342:116960.
[3] Ranjan A,Islam A,Pathak M,et al.Plasma sprayed copper coatings for improved surface and mechanical properties[J].Vacuum,2019,168:108834.
[4] 王博,魏世丞,黄威,等.海洋防腐蚀涂料的发展现状及进展简述[J].材料保护,2019,52(11):132-138.
[5] Wang R,Guo J,Muckleroy E A,et al.Robust silane self-assembled monolayer coatings on plasma-engineered copper surfaces promoting dropwise condensation[J].International Journal of Heat and Mass Transfer,2022,194:123028.
[6] Wu X,Zheng S,Bellido-Aguilar D A,et al.Transparent icephobic coatings using bio-based epoxy resin[J].Materials & Design,2018,140:516-523.
[7] Su Q,Wang T,Hou G,et al.A study on the preparation and cavitation erosion mechanism of polyether polyurethane coa-ting[J].Materials,2022,15(22):8204.
[8] Al-otaibi W,Alandis N M,Al-Mohammad Y M,et al.Advanced anticorrosive graphene oxide-doped organic-inorganic hybrid nanocomposite coating derived from leucaena leucocephala oil[J].Polymers,2023,15(22):4390.
[9] 王霞,王辉,侯丽,等.超疏水防腐蚀涂层的研究进展[J].材料工程,2020,48(6):73-81.
[10] 张晓东,丰少伟,陈宇,等.电化学法制备铜基超疏水结构及其耐蚀性能研究[J].表面技术,2019,48(11):327-332.
[11] Xiang T,Han Y,Guo Z,et al.Fabrication of inherent anticorrosion superhydrophobic surfaces on metals[J].ACS Sustainable Chemistry & Engineering,2018,6(4):5598-5606.
[12] Ma C,Nikiforov A,Chen C,et al.Turning impossible water sliding on water-loving surfaces possible[J].Matter,2023,6(3):653-655.
[13] Buddingh J V,Hozumi A,Liu G.Liquid and liquid-like surfaces/coatings that readily slide fluids[J].Progress in Polymer Science,2021,123:101468.
[14] Singh N,Kakiuchida H,Sato T,et al.Omniphobic metal surfaces with low contact angle hysteresis and tilt angles[J].Langmuir,2018,34(38):11405-11413.
[15] Wang L,Mccarthy T J.Covalently attached liquids:instant omniphobic surfaces with unprecedented repellency[J].Angewandte Chemie International Edition,2016,55(1):244-248.
[16] Zhao H,Khodakarami S,Deshpande C A,et al.Scalable slippery omniphobic covalently attached liquid coatings for flow fouling reduction[J].ACS Applied Materials & Interfaces,2021,13(32):38666-38679.
[17] Wu Q,Yang C,Su C,et al.Slippery liquid-attached surface for robust biofouling resistance[J].ACS Biomaterials Science & Engineering,2019,6(1):358-366.
[18] Zheng H,Liu G,Nienhaus B B,et al.Ice-shedding polymer coatings with high hardness but low ice adhesion[J].ACS Applied Materials & Interfaces,2022,14(4):6071-6082.
[19] Huang S,Li J,Chen L,et al.Suppressing the universal occurrence of microscopic liquid residues on super-liquid-repellent surfaces[J].The Journal of Physical Chemistry Letters,2021,12(14):3577-3585.
[20] Fadeev A Y,Mccarthy T J.Trialkylsilane monolayers covalently attached to silicon surfaces:wettability studies indicating that molecular topography contributes to contact angle hysteresis[J].Langmuir,1999,15(11):3759-3766.
[21] Szubert K,Dutkiewicz A,Dutkiewicz M,et al.Wood protective coatings based on fluorocarbosilane[J].Cellulose,2019,26:9853-9861.
[22] Szubert K,Wojciechowski J,Karasiewicz J,et al.Corrosion-protective coatings based on fluorocarbosilane[J].Progress in Organic Coatings,2018,123:374-383.
[23] Chen W,Fadeev A Y,Hsieh M C,et al.Ultrahydrophobic and ultralyophobic surfaces:some comments and examples[J].Langmuir,1999,15(10):3395-3399.
[24] Hernández-Barrios C A,Saavedra J A,Higuera S L,et al.Effect of cerium on the physicochemical and anticorrosive features of teos-gptms sol-gel coatings deposited on the Az31 magnesium Alloy[J].Surfaces and Interfaces,2020,21:100671.
[25] Mansfeld F.Tafel slopes and corrosion rates obtained in the pre-tafel region of polarization curves[J].Corrosion Science,2005,47(12):3178-3186.
[26] Wu Y,Zhao W,Lu Z,et al.Fluorinated graphene film for corrosion control on copper:experimental and theoretical studies[J].Carbon,2021,179:445-457.
[27] Lukács Z,Baccilieri D,Hancsók J,et al.A dispersion-invariant model of the electrochemical impedance[J].Electrochimica Acta,2021,390:138828.
基金资助
国家自然科学基金(52105229);余姚市科技创新项目(2023JH03010009)
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