通过点击化学的原理, 在商用石墨烯上接枝硅烷偶联剂, 使石墨烯在有机涂层中具有良好的分散性和疏水性。接触角测试表明硅氧烷改性石墨烯(SiG)的水接触角(CA)为132.3°, SiG/环氧涂层(SiG/EPs)复合涂层的CA较EPs提高了10.7°, 表现出较好的疏水性。SiG在稀释剂和涂料中具有较强的分散性。电化学测试和盐雾试验结果说明SiG/EPs具有很好的耐腐蚀性能, SiG/EPs阻抗模值和自腐蚀电流较EPs提升了两个数量级。SiG能明显提升涂层的耐腐蚀性能, 原因是SiG具有较强的疏水性和分散性。
Through the principle of click chemistry, the silane coupling agent was grafted on commercial graphene to make graphene in organic coating with good dispersibility and hydrophobicity.The contact angle test indicated that the water contact angle (CA) of siloxane-modified graphene (SiG) was 132.3°, and the CA of the SiG/epoxy coating (SiG/EPs) composite coating was increased by 10.7° compared with the EPs, which showed better hydrophobicity.SiG exhibited strong dispersibility in organic diluent and coating.The electrochemical test and salt spray test results illustrated that the SiG/EPs exhibited good corrosion resistance, and the SiG/EPs impedance mode value and self-corrosion current were elevated by two orders of magnitude compared to the EPs.SiG could obviously improve the corrosion resistance of the coating due to its strong hydrophobicity and dispersion.
[1] Weitz R T,Yacoby A.Nanomaterials:graphene rests easy[J].Nat Nanotechnol,2010,5(10):699-700.
[2] Pourhashem S,Ghasemy E,Rashidi A,et al.Corrosion protection properties of novel epoxy nanocomposite coatings containing silane functionalized graphene quantum dots[J].Journal of Alloys and Compounds,2018,731:1112-1118.
[3] Pourhashem S,Vaezi M R,Rashidi A,et al.Distinctive roles of silane coupling agents on the corrosion inhibition performance of graphene oxide in epoxy coatings[J].Progress in Organic Coatings,2017,111:47-56.
[4] Haghdadeh P,Ghaffari M,Ramezanzadeh B,et al.The role of functionalized graphene oxide on the mechanical and anti-corrosion properties of polyurethane coating[J].Journal of the Taiwan Institute of Chemical Engineers,2018,86:199-212.
[5] Santanu S,Elena B,Sandip N,et al.Diels-Alder chemistry of graphite and graphene:graphene as diene and dienophile[J].Journal of the American Chemical Society,2011,133(10):3324-3327.
[6] Zhanbin F,Hongli Z,Jing H,et al.In situ exfoliation of graphite into graphene nanosheets in elastomer composites based on Diels-Alder reaction during melt blending[J].Industrial & Engineering Chemistry Research,2019,58(29):13182-13189.
[7] Pablo A D.Organic chemistry of graphene:the Diels-Alder reaction[J].Chemistry-A European Journal,2013,19(46):15719-15725.
[8] Chilkoor G,Sarder R,Islam J,et al.Maleic anhydride-functionalized graphene nanofillers render epoxy coatings highly resistant to corrosion and microbial attack[J].Carbon,2020,159:586-597.
[9] Wang Y,Liang Q,Liu S,et al.Covalent functionalisation by cycloaddition reaction of pristine graphene based on Diels-Alder chemistry and its reinforcement for polyamide 66 fibres[J].Plastics,Rubber and Composites,2021,50(10):496-506.
[10] Asgharzadeh H,Eslami S.Effect of reduced graphene oxide nanoplatelets content on the mechanical and electrical properties of copper matrix composite[J].Journal of Alloys and Compounds,2019,806:553-565.
[11] Cai G,Xu Z,Yang M,et al.Functionalization of cotton fabrics through thermal reduction of graphene oxide[J].Applied Surface Science,2017,393:441-448.
[12] Loryuenyong V,Totepvimarn K,Eimburanapravat P,et al.Preparation and characterization of reduced graphene oxide sheets via water-based exfoliation and reduction methods[J].Advances in Materials Science and Engineering,2013,2013:1-5.
[13] Pourhashem S,Rashidi A,Vaezi M R,et al.Excellent corrosion protection performance of epoxy composite coatings filled with amino-silane functionalized graphene oxide[J].Surface and Coatings Technology,2017,317:1-9.
[14] Parhizkar N,Shahrabi T,Ramezanzadeh B.A new approach for enhancement of the corrosion protection properties and interfacial adhesion bonds between the epoxy coating and steel substrate through surface treatment by covalently modified amino functionalized graphene oxide film[J].Corrosion Science,2017,123:55-75.
[15] Arabpour A,Shockravi A,Rezania H,et al.Investigation of anticorrosive properties of novel silane-functionalized polyamide/GO nanocomposite as steel coatings[J].Surfaces and Interfaces,2020,18:100453-100462.
[16] Chan K C,Tso C Y,Hussain A,et al.A theoretical model for the effective thermal conductivity of graphene coated metal foams[J].Applied Thermal Engineering,2019,161:114112-114122.
[17] Parhizkar N,Ramezanzadeh B,Shahrabi T.The epoxy coating interfacial adhesion and corrosion protection properties enhancement through deposition of cerium oxide nanofilm modified by graphene oxide[J].Journal of Industrial and Engineering Chemistry,2018,64:402-419.
[18] Jiang B K,Chen A Y,Gu J F,et al.Corrosion resistance enhancement of magnesium alloy by N-doped graphene quantum dots and polymethyltrimethoxysilane composite coating[J].Carbon,2020,157:537-548.
[19] Shen Y,Jing T,Ren W,et al.Chemical and thermal reduction of graphene oxide and its electrically conductive polylactic acid nanocomposites[J].Composites Science and Technology,2012,72(12):1430-1435.
[20] Wang T,Guo H C,Chen X Y,et al.Low-temperature thermal reduction of suspended graphene oxide film for electrical sensing of DNA-hybridization[J].Materials Science & Engineering C-Materials for Biological Applications,2017,72:62-68.
[21] Luo Z,Li Y,Wang F,et al.Plasma exfoliated graphene:preparation via rapid,mild thermal reduction of graphene oxide and application in lithium batteries[J].Materials (Basel),2019,12(5):707-718.
[22] Zhang H B,Wang J W,Yan Q,et al.Vacuum-assisted synthesis of graphene from thermal exfoliation and reduction of graphite oxide[J].Journal of Materials Chemistry,2011,21(14):5392-5397.
[23] 吴娟霞,徐华,张锦.拉曼光谱在石墨烯结构表征中的应用[J].化学学报,2014,72(3):301-318.
[24] McDonald-Wharry J,Manley-Harris M,Pickering K.Carbonisation of biomass-derived chars and the thermal reduction of a graphene oxide sample studied using Raman spectroscopy[J].Carbon,2013,59:383-405.
[25] Zhang X,An Y,Han J,et al.Graphene nanosheet reinforced ZrB2-SiC ceramic composite by thermal reduction of graphene oxide[J].RSC Advances,2015,5(58):47060-47065.
[26] Chen Y,Liu Y W,Xie Y,et al.Preparation of hydrophobic silane/graphene oxide composite coating implanted with benzotriazole to improve the anti-corrosion performance of copper[J].Journal of Alloys and Compounds,2022,893:102305-102317.
[27] Chen Chao,Wei Shicheng,Xiang Bin,et al.Synthesis of silane functionalized graphene oxide and its application in anti-corrosion waterborne polyurethane composite coatings[J].Coatings,2019,9(9):587-607.
[28] Ye Y,Chen H,Zou Y,et al.Corrosion protective mechanism of smart graphene-based self-healing coating on carbon steel[J].Corrosion Science,2020,174:108825-108837.
基金资助
重庆市教育委员会科学技术研究重点项目(KJZD-K201800703);重庆市技术创新与应用发展专项/面上项目(cstc2020jscx-msxm1319)
PDF
