环氧-硅溶胶复合金属防腐涂料的制备及表征

将水性硅溶胶引入水性环氧树脂获得一种防腐清漆,再与颜料、助剂等复配制备了环氧-硅溶胶复合水性金属防腐涂料。研究了水性环氧树脂与硅溶胶复合比例与涂层性能的关系,同时考察了8种典型颜料色浆对涂层力学、防腐、耐候等性能的影响。结果表明:当水性环氧和水性硅溶胶的固体分比值为8∶1时,防腐清漆具有较好的综合性能;磷酸盐防腐颜料和铝银浆颜料的加入使涂层的防腐及耐候性能有较大提升,涂层的耐盐雾时间大于3000 h,氙灯照射600 h后,涂层不粉化、不脱落,附着力0级,耐冲击性能优异。     

有机-无机复合金属防腐涂料的制备与性能研究

采用水性硅溶胶与硅丙树脂复配制备了水性硅溶胶-硅丙树脂复合金属防腐涂料。以Q235钢板为基材,研究了不同硅溶胶用量下涂层的力学性能、防腐性能及耐久性能,考察了喷砂与打磨两种不同的基材表面处理工艺对防腐涂料性能的影响。试验结果表明:硅溶胶改性后,复合涂层的耐盐雾时间长达3 000 h以上,氙灯照射250 h后,涂层不粉化、不脱落,附着力达0级,耐冲击性为50 cm,综合性能优异。     

水性环氧树脂的制备及性能研究

用甲基丙烯酸、苯乙烯、丙烯酸丁酯为单体制备了水性丙烯酸改性环氧树脂乳液,对乳液的各项性能进行了测试;并用该乳液制备了水性丙烯酸环氧树脂防腐涂料,对涂层的物理性能和防腐蚀性能(耐盐雾性、电化学性能)进行了测试。结果表明,乳液具有较高的固含量及优良的稳定性,涂层防腐性能优异,满足国家标准。     

一种水性环氧树脂的合成方法及其性能

以水性环氧树脂为研究对象,论述了乳液、涂层的合成方法并对其性能进行了测试。以丙烯酸丁酯、甲基丙烯酸和苯乙烯为原料,过硫酸铵为引发剂合成水性环氧树脂乳化剂,与去离子水、环氧树脂混合得到水性环氧树脂乳液,并制备了防腐涂料,测试了乳液的粒径分布,同时对涂层进行了表征以及耐盐雾实验。结果表明:水性环氧树脂乳液的粒径为0.25～0.39 μm;经盐雾腐蚀处理后,涂层表面并没有出现孔洞;腐蚀电流的数量级为-8.5,涂层具有非常好的防腐性能。     

水性环氧涂料防腐性能影响因素的研究

采用水性环氧树脂与水性胺类固化剂作为成膜物,添加颜填料与助剂制备水性防腐涂料。讨论了水性环氧树脂、水性环氧固化剂种类、环氧/胺氢的物质的量比、防锈颜料的种类及用量对水性环氧涂料防腐性能的影响。制备出耐盐雾性能达500 h以上的水性环氧防腐涂料,超出了HG/T 4759—2014中耐盐雾300 h的要求。     

环氧树脂改性及其涂层性能研究

通过硅溶胶来改善环氧树脂E-44的性能,以改性环氧树脂为基料,制备了富锌防腐涂料。应用电化学交流阻抗法研究了涂料涂层在质量分数为3.5%的NaCl溶液中的腐蚀过程。实验结果表明,添加硅溶胶可明显改善环氧树脂性能,当硅溶胶与环氧树脂E-44质量比5∶3防腐性能最好,同时该涂层具有较好的力学性能、耐热性和耐候性。根据交流阻抗谱图(E IS)响应特征,涂层在浸泡过程可分为3个主要阶段且涂层电阻变小。     

环保型金属防腐涂料性能关键影响因素研究

采用水性硅溶胶与硅丙树脂复配制备了一系列环保型金属防腐涂料,并研究了不同因素对涂料的力学性能、防腐性能及耐久性能的影响。试验结果表明:填料的种类对涂层的防腐性能有重要影响,其中添加超细玻璃粉的涂层防腐性能较好,在测试中未出现毛边、锈蚀蔓延、起泡等情况;涂料的耐盐雾性能随着研磨时间的增加先增强、后减弱;铝银浆粒径大小对银白涂层膜面影响较大;消光粉的添加量决定了涂层的光泽度,随其添加量的增加,涂层光泽度下降,可用于制备亚光涂层;喷砂处理制备的涂层附着力较强,是提高产品耐盐雾性的重要手段。     

水性环氧防腐涂料耐盐雾性能研究

介绍了盐雾腐蚀机理及影响水性环氧防腐涂料耐盐雾性能的各种因素 ,解决了一般水性环氧防腐涂料耐盐雾性能差的问题 ,其涂料性能与溶剂型防腐涂料基本接近。     

SBA-15改性氧化石墨烯的环氧复合涂层制备及其防腐性能

用γ-氨丙基三乙氧基硅烷(KH-550)将SBA-15分子筛接枝到氧化石墨烯上制备功能填料,并将其填充到水性环氧树脂中制备复合涂层。采用FTIR、XRD、氮气吸附脱附和TEM对填料进行了表征;采用电化学阻抗谱(EIS)、盐雾实验和附着力测试等方法对不同填料添加量涂层的防腐性能及力学性能进行了表征。实验结果表明:当功能填料添加质量分数为1.0%(占体系总质量)时,涂层电化学阻抗值达到4×10~8Ω·cm~2,同时具有最佳耐盐雾性能以及附着力性能。复合涂层的防腐性能明显优于纯环氧涂层,这主要是因为功能填料的孔/片协同结构有效地延缓了腐蚀粒子到达金属基材表面的时间。     

色浆和助剂对金属防腐涂料的影响

在涂料中添加各种助剂来改善涂料的性能,已经成为防腐蚀涂料研究的一个热点领域.将水性硅溶胶与硅丙树脂复配,并与色浆复合,制得一种金属防腐涂料.研究了色浆的添加量对涂层性能的影响,同时在金属防腐涂料中添加光稳定剂、消光粉以及增稠剂并通过调节各种助剂的加入量来改善涂料的性能,考察了漆膜的附着力、硬度、耐盐雾性等性能的变化情况...     

十八胺改性纳米SiO2制备及在水性环氧防腐涂料中的应用

摘要：以正硅酸四乙酯（TEOS）、十六烷基三甲基溴化铵（CTAB）、γ-(2，3-环氧丙氧基)丙基三甲氧基硅烷（KH560）为原料，采用溶胶-凝胶法制备表面环氧基化的纳米SiO2，通过十八胺（ODA）的伯胺端基与纳米SiO2表面的环氧基进行反应得到ODA-SiO2，用于制备水性环氧防腐涂料。通过傅里叶变换红外光谱（FTIR）、热重测试（TG）、X射线光电子能谱仪（XPS）、扫描电镜（SEM）表征ODA成功接枝到SiO2表面；通过电化学测试、耐盐雾性能测试对水性环氧涂层的防腐性能进行了分析。结果表明，含0.3wt%ODA-SiO2的水性环氧涂层具有较好的防腐蚀性能，耐盐雾时间500h。     

Incorporation of silica network and modified graphene oxide into epoxy resin for improving thermal and anticorrosion properties

In this study, the silica network and functionalized graphene oxide (GO) were incorporated into the epoxy coating systems, which was aimed to improve the thermal property and corrosion resistance of epoxy coatings. First, tetraethyl orthosilicate (TEOS) oligomers and epoxy hybrid was fabricated through sol–gel method. Then the (3-aminopropyl) triethoxysilane (APTES) modified graphene oxide (FGO) was added into the epoxy hybrid composite to obtain anticorrosion coatings. Fourier transform infrared spectroscopy, thermogravimetric analysis (TGA), Raman spectrum, and X-ray photoelectron spectrum were conducted to evaluate the structural information of GO and APTES modified GO nanosheets. The results indicated that the APTES successfully grafted onto the surface of GO sheets. Besides, TGA curves, electrochemical measurements and salt spray test were also carried out to characterize the thermal performance and corrosion resistance of GO based epoxy coatings. The TGA results revealed that the thermal performance of epoxy coating containing silica network and FGO nanofiller (ES/FGO) was significantly strengthened compared to pure epoxy. The initial degradation temperature of epoxy coating was increased from 300 to 343.7°C after incorporation of silica component and FGO. The EIS measurements demonstrated that the impedance modulus of ES/FGO was significantly higher than neat epoxy, which indicated that the corrosion resistance of epoxy was substantially strengthened after introduction of silica component and FGO. The corrosion rate and inhibition efficiency of epoxy composite coatings were also shifted from 1.237 × 10⁻⁷ mm/year and 76.6% (for neat epoxy) to 1.870 × 10⁻⁹ mm/year and 99.6% (for ES/FGO), respectively. The salt spray test also revealed that the silica and FGO can improve the corrosion resistance of epoxy coating. Additionally, the dispersion of GO sheets was also enhanced after the modification of APTES siloxane.     

氨基化GO/磺化聚苯胺改性水性环氧防腐涂料的制备与性能

以氯磺酸、苯胺和过硫酸铵为主要原料合成磺化聚苯胺（SPANI）,利用聚乙烯亚胺（PEI）还原GO,合成PG复合材料。利用GO上活性位点,将SPANI与PG结合,制备了SPG复合材料。利用SPG与水性环氧树脂共混制备水性环氧防腐涂料。通过FT-IR、XRD对SPG复合材料结构表征,结果表明,PEI上的氨基成功与GO结合,SPANI成功增加了PG的层间距;通过盐雾、电化学等实验对水性环氧涂层的防腐性能进行测定,并分析了涂层的物理性能。结果表明,当添加2wt%SPG时（添加量以环氧树脂和固化剂总质量为基准,下同）的水性环氧防腐涂层具有最优异的耐腐蚀性,腐蚀效率可达到99.19%,与纯EP相比,腐蚀电流密度从1080 nA?cm-2减小至307 nA?cm-2,腐蚀电压从-0.840mV升高至-0.347mV。     

Synthesis of 3-glycidoxypropyltrimethoxysilane modified hydrotalcite bearing molybdate as corrosion inhibitor for waterborne epoxy coating

Zinc aluminum hydrotalcite intercalated with molybdate (HTM) and modified by 3-glycidoxypropyltrimethoxysilane (HTM-GS) was prepared and incorporated into a waterborne epoxy coating. The synthesized HTM-GS was characterized by FTIR, XRD, SEM, and TEM. The inhibitive action of HTM-GS on carbon steel was evaluated using electrochemical measurement and SEM/EDX analysis. The corrosion protection of the waterborne epoxy coating containing HTM-GS was evaluated and compared to that of the pure waterborne epoxy coating and the waterborne epoxy coating containing HTM by salt spray test and adhesion measurement. It was shown that the molybdate was intercalated in the hydrotalcite structure and the molybdate contents in HTM and HTM-GS were 16.0 and 13.2 wt%, respectively. The polarization curves obtained on the carbon steel electrode showed that HTM and HTM-GS are anodic corrosion inhibitors, and their inhibition efficiencies at concentration of 3 g/l were 92.0 and 94.7%, respectively. Additionally, HTM and HTM-GS at concentration of 0.5 wt% improved corrosion resistance and adhesion of waterborne epoxy coatings. Surface modification by 3-glycidoxypropyltrimethoxysilane ameliorated the dispersion of HTM in epoxy matrix and the effect of HTM on protection properties of waterborne epoxy coating.     

新型硅溶胶改性环氧复合涂料的制备及性能分析

通过溶胶-凝胶法制备氨基改性硅溶胶,并将其掺混改性E-44环氧树脂以得到硅溶胶改性环氧复合涂料。利用红外光谱(FT-IR)、接触角、热重(TGA)等对所得涂层进行分析测试。结果表明:当加入的改性S iO2硅溶胶占环氧树脂含量为2%~5%时,涂层的附着力、硬度、耐冲击性、柔韧性等较好,同时涂层的耐酸、耐碱、耐汽油、耐蒸馏水、耐盐水效果也达到实际使用标准。杂化涂层中S iO2与环氧树脂两相间存在化学键及氢键作用,有机-无机杂化交联的结果,可提高涂层的耐高温及防腐蚀性能。     

水性聚酯/环氧卷材底漆的研究

为了解决日益严峻的环境问题,水性涂料成为未来环境友好型涂料的发展方向.以水性饱和聚酯和水性环氧树脂物理混合的方法研制水性卷材底漆,讨论了聚酯和环氧的质量比以及不同固化剂对漆膜性能的影响,并通过电化学阻抗谱探讨了漆膜的耐蚀机理.结果表明,当聚酯和环氧树脂的质量比为7∶3时,以部分甲醚化的氨基树脂SM5717为固化剂,所得...     

水性锈转化涂料的制备及性能

采用苯丙乳液与改性苯丙乳液共混作为成膜物质,以单宁酸为转锈剂,柠檬酸为配位剂,焦性没食子酸为转锈促进剂,再加入成膜助剂、有机胺类缓蚀剂、渗透剂等,制备了一种可应用于带锈钢材的水性锈转化涂料。通过正交试验和单因素试验确定了涂料的最优配方为:成膜物质65%,转锈剂5%,转锈促进剂2%,缓蚀剂0.6%,渗透剂2%,配位剂0.5%,成膜助剂1.6%,蒸馏水余量。采用塔菲尔极化曲线测量、中性盐雾试验和盐水浸泡试验考察了漆膜的耐蚀性。结果表明,所制水性锈转化涂膜可耐盐雾96 h,耐盐水浸泡168 h,且耐酸性较强,在pH为2的3.5%NaCl溶液中有保护作用。与两款市售涂料相比,该自制水性锈转化涂料具有更好的耐蚀性。     

碳纳米管对水性环氧富锌防腐涂料防腐性能的影响

将碳纳米管（ CNTs）以水性浆料的形式添加在环氧乳液中,制备 CNTs改性水性环氧富锌防腐涂料以解决传统富锌涂料高锌含量的问题。通过 SEM来观察涂层的形貌,附着力、耐冲击测试表征涂层的机械性能,开路电压、极化曲线和耐盐雾等方法探讨碳纳米管含量对环氧富锌防腐涂层防腐性能的影响。结果表明：涂层中添加 CNTs可以增强涂层的耐冲击性,且 CNTs对涂层附着力的影响不显著;涂层防腐性能随 CNTs含量的增加呈现先增强后减弱的趋势;在 60.0%锌含量体系中,添加 0.2%含量的 CNTs,与 60.0%锌含量空白组比较,涂层腐蚀电流密度降低 66.7%,与 70.0%锌含量空白组比较,其腐蚀电流密度也可降低 53.8%,且耐盐雾实验 2 000 h后,涂层仍未出现明显腐蚀现象,即在60.0%锌含量体系中添加 0.2%含量的 CNTs,不仅可以降低涂层 10.0%的锌含量,还可以增强涂层的防腐性能。     

Preparation and characterization of waterborne epoxy latexes and epoxy/(silica sol) composites

A series of waterborne epoxy latexes was synthesized, and epoxy/(silica sol) composite latexes were prepared. The effects of functional monomer methacrylic acid (MAA) and silica sol on the latex particle size, morphology, and stability were investigated. With increasing amounts of MAA, the conversion rate increased, the particle size reduced, and the viscosity of the epoxy latexes increased. The epoxy latexes had storage stability and could be stored at room temperature for more than 6 months with a solid content variation of less than 1%. For the (silica sol)‐modified waterborne epoxy latexes, the effects of preparation techniques and silica sol content on the latexes and latex films were investigated. When the silica sol content increased, the particle size of the composite latexes decreased. The morphology investigation showed that when the silica sol content increased, the uneven surface level of the latex films was increased. The increase of elemental silica on the surface was in accord with the improvement of the water resistance of the composite latex films. The heat resistance of these films was improved as well, and their overall performance was better than that of the epoxy latex films. J. VINYL ADDIT. TECHNOL., 20:57–64, 2014. © 2014 Society of Plastics Engineers