•66•DOI:10.19289/j.1004-227x.2023.04.011水性有机硅改性环氧树脂防护涂层的制备及性能何丽红1,*，杨克1,2，谷颖佳1，马悦帆1,2，郝增恒31.重庆交通大学材料科学与工程学院，重庆4000742.苏交科集团股份有限公司，江苏南京2111123.重庆市智翔铺道技术工程有限公司，重庆400060摘要：利用二甲基二氯硅烷(DMDCS)与环氧树脂E51合成有机硅改性环氧树脂并水性化，与高岭土复合得到水性有机硅改性环氧树脂涂料，以拉伸强度和粘结强度优选高岭土掺量，并考察了其涂层的防护性能。结果表明，高岭土掺量为5%时，涂层的粘结强度和拉伸强度分别为2.08MPa和46.55MPa。该涂层具有优良的疏水性、耐热性、耐蚀性、抗紫外老化性能及抗氯离子渗透性能，将其应用于混凝土表面可有效保护混凝土结构。关键词：水性环氧树脂；有机硅改性；高岭土；混凝土；防护涂层；抗紫外老化；抗氯离子渗透中图分类号：TB332文献标志码：A文章编号：1004–227X(2023)04–0066–07Preparationandpropertiesofwaterborneorganosilicon-modifiedepoxyprotectivecoatingHELihong1,*,YANGKe1,2,GUYingjia1,MAYuefan1,2,HAOZengheng31.SchoolofMaterialsScienceandEngineering,ChongqingJiaotongUniversity,Chongqing400074,China2.JiangsuTransportationInstituteCo.,Ltd.,Nanjing211112,China3.ChongqingZhixiangPavingTechnologyEngineeringCo.,Ltd.,Chongqing400060,ChinaAbstract:Anorganosilicon-modifiedepoxyresinwassynthesizedfromdimethyldichlorosilane(DMDCS)andepoxyresinE51andthendispersedinwater.Thedispersionwasaddedwithkaolin,formingawaterborneorganosilicon-modifiedepoxypaint.Thedosageofkaolinwasoptimizedaccordingtothetensilestrengthandadhesionstrengthtestingresultsofthecoating.Theprotectionperformanceofthecoatingwasstudied.Theresultsshowedthatwhenthedosageofkaolinwas5%,theadhesionstrengthandtensilestrengthofthecoatingwere2.08MPaand46.55MPa,respectively.Thecoatinghasexcellenthydrophobicity,heatresistance,corrosionresistance,ultravioletagingresistance,andchloridepenetrationresistance,beingabletoprovideeffectiveprotectionforconcretestructures.Keywords:waterborneepoxyresin;organosiliconmodification;kaolin;concrete;protectivecoating;ultravioletagingresistance;chloridepenetrationresistance为提高混凝土结...
