聚苯胺防腐蚀涂料一些问题的讨论

现有重防腐油漆所用防腐蚀颜料大都含锌、铬、铅等重金属化合物。出于环境保护考虑,也由于对更有效防腐涂料的需求,全世界都在急切开发低毒、无毒、高效的重防腐涂料。用聚苯胺有望配制成为环境友好、高效的防腐蚀涂料,30多年来,研发聚苯胺防腐蚀涂料一直是热门课题。聚苯胺防腐蚀涂料涉及多个科学及技术领域。本文讨论了涉及聚苯胺化学及涂料科学的一些问题,以期对水性防腐涂料、粉末防腐涂料、耐高温防腐涂料等的创新有所帮助。     

聚苯胺材料导静电性能及其配方研究

主要研究采用聚苯胺材料代替石墨配制混合型导静电涂料的方法,可提高传统的石墨添加型导静电涂料的性能,并克服石墨迁移现象。     

聚苯胺导电涂料的制备及性能研究

本研究采用氧化聚合方法制备了具有高电导率的导电聚苯胺。并以这种聚苯胺为导电填料,以丙稀酸为成膜物,制备了一种电导率为10-8～10-5s/m的导电涂料。并研究了聚苯胺含量对导电涂料电导率及涂膜性能的影响。     

高固含量聚酯／氨基树脂涂料的制备

采用熔融缩聚法制备了高固含量羟基聚酯树脂,并由该聚酯树酯和六甲氧甲基三聚氰胺固化剂配制成高固含量聚酯涂料。研究了高固含量聚酯树脂的合成工艺参数对树脂及其涂料体系的粘度、分子量、固含量、硬度、耐冲击性、柔韧性、耐磨性、耐溶剂性的影响,以便为进一步开发高固含量聚酯类涂料提供理论依据。     

颜料、颜料制剂及填料

201208101醇酸底漆用环保型防锈颜料的评估[刊,英]/Marti,Mireia等//Progress in Organic Coatings.-2012,73(4).-321～329首先配制含10%(质量分数)磷酸锌的醇酸树脂配方,随后采用低浓度的导电聚合物取代磷酸锌防锈剂进行改性,并具体配制了3种改性涂料,分别含聚苯胺(本征态)、聚苯胺翠绿亚胺盐(掺杂态)、一种环保型聚噻吩衍生物(部分氧化)。对上述4种醇酸树脂涂料的性能和耐腐蚀性进行了表征。     

喷墨打印纸涂料的光泽度研究

研究了几种不同的颜料作为高光喷墨打印纸的涂料，包括不同的颜料对胶粘剂用量比例，涂布量、不同的胶粘剂等对涂层光泽的影响。结果表明，对高光泽涂层，颜料需到少占涂料的70％质量分数，颜料用量比例越高，光泽也越高。涂布量和涂料固含量越高，光泽也提高。聚乙稀醇是最佳的胶粘剂。     

高模数硅酸钾溶液及其富锌涂料的制备

以低模数硅酸钾溶液、碱性硅溶胶为主要原料,采用有机硅氧烷作为改性剂制备了稳定的高模数硅酸钾溶液,与锌粉按30:70的质量比例配制富锌涂料.探讨了模数、固含量、有机硅氧烷的种类以及添加量对高模数硅酸钾溶液贮存稳定性和富锌涂料性能的影响.结果表明:硅酸钾溶液的模数在5.5、固含量在25%、γ-缩水甘油醚丙基三甲氧基硅烷(Z-6040)占总质量的3%时,贮存稳定期超过30 d(50℃),由改性后的高模数硅酸钾溶液所配制的富锌涂料涂膜致密且防腐性能优异,可作为长效重防腐涂料使用.     

聚苯胺乳液在水性带锈涂料中的防腐性能研究

以聚苯胺乳液为防腐添加剂,制备了水性聚苯胺带锈涂料,研究了聚苯胺乳液在带锈涂料中的防腐性能及其对涂料性能的影响,并探讨了聚苯胺与转化剂及铁锈的反应机理。结果表明:聚苯胺具有增强涂料转化效果、提高涂层耐水和耐盐雾性能、赋予涂料自恢复性和抗锈能力等特性;聚苯胺可与转化剂及铁锈反应,生成大分子物质,该物质紧密附着在基材表面,加上聚苯胺的防腐性能,可以实现钢铁的长效防腐。     

聚苯胺/环氧复合阴极电泳涂料防腐蚀性能的研究

运用插层聚合的方法制备了蒙脱土／聚苯胺复合材料，并进行了表征。将该复合材料通过共混的方式加入聚酰胺／环氧阴极电泳（CED）涂料中配制成聚苯胺／环氧复合阴极电泳涂料，并利用电化学阻抗谱方法对各电泳涂层的防腐性能进行了分析。研究发现：在3．5％NaCl溶液中浸泡10d后，腐蚀介质不能到达涂层／基底金属界面，金属表面没有发生腐蚀反应。随着聚苯胺含量的增加，复合电泳涂膜的阻抗值增加，具有较好的防腐性能。当聚苯胺含量相同时，与掺杂态聚苯胺复合电泳涂膜相比，本征态聚苯胺复合电泳涂膜具有很高的阻抗值，表现出更好的防腐性能。     

聚苯胺涂料生产方式和防锈性能研究

对聚苯胺材料在船舶涂料中的分散方式和生产工艺及防锈性能进行了研究,它可以采用传统的设备和工艺生产各种类型的含聚苯胺高性能防锈涂料,并为聚苯胺在涂料中的应用提供了有益的参考。     

聚苯胺颗粒对水性环氧树脂涂层防腐性能的影响

以盐酸为掺杂剂、过硫酸铵为氧化剂、咪唑类离子液体为稳定剂,采用化学氧化聚合法合成了导电聚苯胺(PANI)颗粒,将其分散到水性环氧树脂(ER)中制成聚苯胺水性环氧防腐涂层,研究了聚苯胺颗粒对涂层防腐性能和机械性能的影响。结果表明,添加聚苯胺显著提高了水性环氧涂层的阻隔性能,信号频率f=0.01 Hz时,PANI/ER涂层的阻抗(|Z|f=0.01Hz)均高于纯ER涂层。添加5.0wt% PANI时ER涂层阻隔性能最好,浸泡0~168 h时|Z|f=0.01Hz稳定在约8.0×108 Ω?cm2,浸泡168 h后|Z|f=0.01Hz=7.5×108 Ω?cm2,远高于ER和其它PANI/ER体系。中性盐雾实验结果表明,聚苯胺赋予了涂层钝化腐蚀的能力,显著提高了涂层的防腐性能,且其添加量越高,防腐性能越好。弯曲和冲击实验结果表明,涂层的机械性能随聚苯胺含量增加先上升后降低,当聚苯胺添加量不超过5.0wt%时,涂层的机械性能优异,附着力和韧性均较好;PANI添加量增至7.0wt%时,ER涂层的脆性明显变大,机械性能下降。聚苯胺在水性环氧体系中的最宜添加量为5.0wt%,此时涂层的机械性能良好,综合防腐性能最优。     

有机硅改性丙烯酸汽车漆

用有机硅改性丙烯酸树脂调制丙烯酸氨基漆和聚氨酯漆的方法及漆膜性能,结果表明 该漆具有施工固体分高、耐水性良好、综合性能高等优点。     

聚苯胺防腐性能及应用研究

在诸多导电聚合物中,聚苯胺因其广泛的应用特别是在金属防腐方面的使用引起广大学者的特别关注。主要针对聚苯胺涂层的相关制备方法、防腐机理及应用进行论述,并根据目前的研究现状,提出今后聚苯胺的主要研究方向。     

水性聚苯胺防腐涂料研究

将聚苯胺水性微乳液和环氧树脂共混作为底漆、与环氧树脂面漆复合制成防腐涂料，采用开路电位法评价复合涂层的防腐性能。结果表明，合成聚苯胺水性微乳液所使用的酸介质、聚苯胺乳液的用量和腐蚀介质等对涂层的防腐性能均有影响。以十二烷基苯磺酸(DBSA)为酸性介质合成的聚苯胺水性微乳液，当其用量为50％时，复合涂料的防腐性能最佳，与裸露钢板相比，该复合涂层的平衡开路电位可提高245mV左右。该复合涂料不使用任何有机溶剂，是一种环境友好型绿色涂料。     

聚苯胺复合防腐涂料的制备及应用

聚苯胺复合防腐涂料的制备包括涂层复合和共混复台两种方式。涂层复合主要通过面漆的屏蔽作用来加强涂料的防腐性能；共混复合主要利用涂料中的其他组分提供良好的粘附力来加强涂料的防腐性能。综述了近年来聚苯胺复合防腐涂料的研究、性能和一些具有商业前景的应用领域，并指出了聚苯胺防腐涂料的研发方向。     

Investigation of corrosion performance of epoxy coating containing polyaniline nanoparticles

An emulsion polymerization of aniline was performed in a solution of dodecylbenzenesulfonic acid emulsifier, benzoyl peroxide oxidant and tartaric acid as dopant. The polyaniline-containing coating was applied over carbon steel panels and the polyaniline content in the coating was 1?%. The influence of reactants concentration on the morphological and anti-corrosive properties of polyaniline was investigated to determine the optimum conditions for the synthesis of polyaniline nanoparticles. The average size of particles determined by X-ray diffraction measurement was 70?C104?nm, which is found to be in agreement with the scanning electron microscopy results. Corrosion resistance of coatings was obtained using electrochemical techniques (electrochemical impedance spectroscopy and open circuit potential measurements) in 3.5?% sodium chloride solution. Nyquist diagrams showed two capacitance loops, one at high frequency range followed by a larger one at low frequencies due to coating and charge transfer resistance. The corrosion resistance values were found to decrease due to the corrosion of carbon steel in pinholes of the coating. For longer immersion times, the coating resistance values were found to increase due to the passivation effect of polyaniline. The results showed that epoxy coating with doped polyaniline nanoparticles is able to offer protection in sodium chloride solution.     

Evaluation of an environmentally friendly anticorrosive pigment for alkyd primer

An alkyd formulation containing zinc phosphate (10 wt.%) was prepared and subsequently modified replacing the latter anticorrosive additive by a very low concentration of conducting polymer. Specifically, three modified paints, which contain polyaniline emeraldine base (undoped form), polyaniline emeraldine salt (doped form) and an eco-friendly polythiophene derivative (partially oxidized), were formulated. The properties and corrosion resistance of the four alkyd coatings have been characterized. Among the three modified paints, the one containing polythiophene shows the best adherence and the highest corrosion resistance. This has been attributed to the fact that the miscibility of the polythiophene derivative with the alkyd formulation is better than that of polyaniline. Furthermore, accelerated corrosion assays and electrochemical impedance spectroscopy measurements revealed that the corrosion resistance of the paint with polythiophene is several orders of magnitude higher than that with zinc phosphate. The polythiophene derivative has been found to induce the formation of a passivating and well-adhered layer between the coating and the surface, preventing the access of chloride anions and oxygen to the substrate.     

聚苯胺的制备及其在涂料中的应用

导电聚苯胺有优异的导电性能、化学稳定性和防腐蚀性能,具有巨大的潜在实用性价值介绍了导电聚苯胺的国内外研究现状、防腐蚀机理、制备方法及其在涂料中的应用。     

Corrosion protection coating containing polyaniline glass flake composite for steel

Corrosion protection of steel by glass flake (GF) containing coatings is widely used in marine atmosphere. Even though, the coatings containing glass flake are highly corrosion resistant, their performance is decreased due to the presence of pinholes and coating defects. It is well established that polyaniline containing coating is able to protect the pinhole defects in the coatings due to passivating ability of polyaniline. Hence a study has been made on the corrosion protection ability of steel using polyaniline-glass flake composite containing coating with 10% loading of glass flake in epoxy binder. The polyaniline glass flake composite (PGFC) was synthesized by chemical oxidation of aniline by ammonium persulphate in presence of glass flake. The corrosion protection ability of GF and PGFC containing coating on steel was found out by salt spray test and EIS test in 3% NaCl. In both the tests, the resistance value of the PGFC containing coating has remained at 10⁸-10⁹ Ω cm² where as for the GF containing coating, the resistance values decreased to 10⁵ Ω cm². The enhanced corrosion protection ability of the PGFC containing coating is due to the passivation ability of the polyaniline present in the coating.