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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。 相似文献
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显微红外技术研究聚苯胺涂层防腐蚀性能 总被引:1,自引:0,他引:1
聚苯胺是一种导电高分子,聚苯胺涂料因其性价比较高而被看作是新一代环境友好型的高效防腐涂料.本研究以过硫酸铵为引发剂,十二烷基苯磺酸钠为乳化剂,采用乳液聚合法制备丙烯酸树脂乳液.分别采用乳液互穿网络聚合法和乳液共混法制备聚苯胺--丙烯酸树脂防腐蚀涂料,并利用红外显微镜技术分析聚苯胺在聚苯胺--丙烯酸树脂防腐蚀涂料中的分散性.涂层在马口铁上腐蚀电位和极化曲线的测试结果表明,采用乳液互穿网络聚合法制备的聚苯胺--丙烯酸树脂防腐蚀涂层在ω(NaCl)为3.5%的NaCl溶液中的开路电位比乳液共混法升高了0.596V,自腐蚀电流降低了1个数量级. 相似文献
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聚苯胺被认为是最有应用前景的导电聚合物,目前被广泛应用在涂料、传感器、电极及电磁屏蔽等领域,而其在防腐涂层中的应用是目前研究的热点。综述了聚苯胺纳米结构的制备及其在防腐涂层中的应用,并归类总结了目前对聚苯胺防腐机理的推测与研究进展。 相似文献
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管道防腐用环氧粉末涂料及其新进展 总被引:3,自引:0,他引:3
介绍了管道防腐用环氧粉末涂料的组成及固化体系,综述了其在国内外的发展状况。结合国产管道防腐用环氧粉末涂料存在的问题和粉末技术的最新发展,探讨了提高国产管道防腐用环氧粉末涂料综合性能的技术途径。 相似文献
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Tung oil is used as a catalyst-free repair agent. Tung oil-loaded polyurethane (PU) microcapsules are prepared by interfacial polymerization in a SiO2-stabilized Pickering emulsion system, polyaniline (PANI) is deposited in situ on the PU microcapsule surface, and tung oil-loaded PU/PANI double-layer shell microcapsules are obtained. Synthesized PU/PANI microcapsules showed the characteristic dark-green color of conductive PANI. The average particle size is 31.1 ± 8.1 µm and the core content is 45.1 ± 4.3 wt%. The microcapsules have a good thermal stability, and the chemical structure of the PU/PANI wall and tung oil core is confirmed by Fourier transform infrared analysis. Self-healing anti-corrosion coatings are prepared by adding 10 wt% microcapsules into epoxy resin. The corrosion resistance properties of the self-healing coating are evaluated by immersing scratched coatings in 10 wt% NaCl solution for 15 days. The self-healing coating with 10 wt% tung oil-loaded PU/PANI microcapsules have the best anti-corrosion property, and slight corrosion do not occur until 15 days after immersion in salt solution. The self-healing and anti-corrosion mechanism are revealed. The tung oil core and the PANI wall of microcapsules contributed synergistically to the excellent self-healing and anti-corrosion properties of the coating through the formation of self-healing films and passivation layers. 相似文献
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Ayesha Kausar 《Polymer-Plastics Technology and Engineering》2020,59(6):658-673
ABSTRACTEpoxy is a thermosetting polymer with exceptional mechanical robustness, thermal stability, and chemical resistance. This article is devoted to updating development, processing, and physicochemical characterizations of epoxy-based anti-corrosion coatings. Incorporation of different polymers in epoxy matrix has motivated extensive research progress in the field of corrosion protection. Epoxy has been blended with polyaniline, polypyrrole, polythiophene, polyamide, polyester, polyurethane, poly(vinyl alcohol), and polydimethylsiloxane to form corrosion protective coatings. The addition of conducting polymer and nanofiller to epoxy matrix modified the nanocomposite morphology and facilitated the development of passive layer at metal/polymer interface. Consequently, nanocomposite coatings act as physical barrier to hinder the penetration of corrosive ions. Likewise, fine dispersion of nanocarbon and inorganic nanoparticles in compatible blends of epoxy/polyamide, epoxy/polyester, epoxy/polyurethane, and epoxy/poly(vinyl alcohol) has resulted in improved adhesion, wear, barrier and anticorrosion properties of the nanocomposite coatings. Design of epoxy blend-based nano-architectures may facilitate appropriate tailoring of overall performance of the resulting anti-corrosion coatings for advance technical applications including aerospace, automotive, construction, electronic devices, and biomedical relevances. New processing techniques may overcome challenges toward high performance future epoxy-based coatings. 相似文献
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将聚苯胺球磨分散于聚酰胺-651中并通过离心过程除去混合物中的大颗粒聚苯胺。分别以离心前后的混合物为固化剂,与环氧树脂E-51混合,制备出PANI和C-PANI防腐涂层。将涂层浸泡于95℃,12%的NaCl (质量分数,下同)溶液中并对比涂层的韧性、防腐性能以及附着性能。实验结果表明:聚苯胺可以有效改善涂层的韧性和防腐性能。其中离心处理后获得的C-2.0% PANI涂层综合性能最佳,在高温盐溶液中浸泡70 d后开裂,开裂后的金属表面基本无腐蚀反应。 相似文献
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