溶剂反应型环氧基混凝土防腐材料的制备与性能研究
发布时间：2018-07-15 21:24
【摘要】：混凝土腐蚀破坏发生在基础建筑、道路桥梁、水利水电、海洋工程等各个领域之中,腐蚀不但造成巨大的经济损失,而且威胁着人类生命财产安全,因此开展混凝土结构防腐蚀的研究对国民经济建设和国防建设有重大意义。本论文以不同的反应型溶剂作为环氧树脂的分散介质,分别制备了糠醛/丙酮/环氧基渗入固结型防腐材料、甲基异丁基酮/环氧基渗入固结型防腐材料、无溶剂环氧防腐涂料。本文的主要研究内容和结果如下:第一,使用糠醛丙酮反应型溶剂制备了糠醛/丙酮/环氧基渗入固结型防腐材料并对其基础物理性能,渗透性能,耐腐蚀性能进行研究。研究结果表明:糠醛/丙酮/环氧基渗入固结型防腐涂层具有优异的基础物理性能,涂层干湿粘接强度高达10.9MPa及6.9MPa,对砂浆有明显的增强作用。材料与砂浆具有良好的润湿性能,能够渗透于砂浆表面3.5mm深。通过对材料与砂浆的渗透性能研究,发现材料与砂浆之间的润湿性能大于大部分粘度较小的有机溶剂。涂层具有良好的耐腐蚀性能,在10%的氢氧化钠溶液及5%的硫酸溶液中浸泡28天涂层完好无损。第二,酮类化合物与伯胺能够缩合成酮亚胺,因而环氧树脂、胺类化合物与酮类化合物两两之间均能够发生缩合反应最终形成大分子。本论文研究了不同酮类化合物在三者的缩合反应体系中的反应活性,最终选用反应活性及渗透性兼顾的甲基异丁基酮作为环氧树脂的反应型溶剂制备出甲基异丁基酮/环氧基渗入固结型防腐材料。研究了不同缩水甘油醚及其用量对材料性能的影响、不同类型固化剂对材料性能的影响及通过羟醛缩合改性对材料性能的影响。研究结果表明:甲基异丁基酮/环氧基渗入固结型防腐材料均具有良好的透明性,其透光率高达80%。而使用腰果酚醛胺型复合固化剂固化的涂层基础物理性能、渗透性能及耐腐蚀性能均较好。在上述基础上,使用双官能度缩水甘油醚并且与甲基异丁基酮复合比例为1/2时所得到的涂层配方综合性能最佳。第三,使用缩水甘油醚类反应型溶剂A作为环氧树脂的分散介质,制备出了无溶剂环氧防腐涂料,并对其基础物理性能及耐腐蚀性能进行研究。研究结果表明:无溶剂环氧防腐涂料具有良好的基础物理性能及耐腐蚀性能,其涂层性能还得到了第三方检测机构的认证。本论文还针对涂料的施工工艺进行了研究,在某养殖池中进行现场施工,对糠醛/丙酮/环氧基渗入固结型防腐涂料及无溶剂环氧防腐涂料的施工工艺进行了完善。
[Abstract]:Concrete corrosion damage occurs in many fields, such as basic construction, road and bridge, water conservancy and hydropower, ocean engineering and so on. Corrosion not only causes huge economic losses, but also threatens the safety of human life and property. Therefore, it is of great significance for national economy construction and national defense construction to carry out the research on corrosion prevention of concrete structure. In this paper, different reactive solvents were used as dispersing medium to prepare furfural / acetone / epoxy group infiltrated and consolidated anticorrosive materials, and methyl isobutyl ketone / epoxy group infiltrated and consolidated anticorrosive materials. Solventless epoxy anticorrosive coating. The main contents and results of this paper are as follows: firstly, furfural / acetone / epoxy group infiltrated and consolidated anticorrosive materials were prepared with furfural acetone reactive solvent and their basic physical properties, permeability and corrosion resistance were studied. The results show that furfural / acetone / epoxy group infiltrated and consolidated anticorrosive coating has excellent basic physical properties. The dry and wet bonding strength of the coating is as high as 10.9MPa and 6.9 MPA respectively. The material has good wettability with mortar and can penetrate deep 3.5mm on mortar surface. It is found that the wettability between the material and the mortar is higher than that of most organic solvents with low viscosity through the study of the permeability of the material and mortar. The coating has good corrosion resistance. The coating soaked in 10% sodium hydroxide solution and 5% sulfuric acid solution for 28 days is intact. Secondly, ketone compounds and primary amines can be condensed to form keto-imine, so epoxy resin, amine compounds and ketones can be condensed to form macromolecules. In this paper, the reactivity of different ketones in the condensation reaction system was studied. Finally methyl isobutyl ketone with both reactive activity and permeability was selected as the reactive solvent of epoxy resin to prepare methyl isobutyl ketone / epoxy group infiltrated and consolidated anticorrosive material. The effects of different glycidyl ethers and their contents on the properties of the materials, the effects of different curing agents on the properties of the materials and the effects of the condensation modification of hydroxyl aldehyde on the properties of the materials were studied. The results show that the penetration of methyl isobutyl ketone / epoxy group has good transparency and its transmittance is as high as 80%. The basic physical properties, permeability and corrosion resistance of the coatings cured with cashew phenolic amine compound curing agent were better. On the above basis, the composite properties of the coating obtained by using difunctional glycidyl ether and the ratio of 1 / 2 with methyl isobutyl ketone are the best. Thirdly, a solventless epoxy anticorrosive coating was prepared by using glycidyl ether reactive solvent A as the dispersing medium of epoxy resin, and its basic physical properties and corrosion resistance were studied. The results show that the solventless epoxy anticorrosive coating has good basic physical properties and corrosion resistance. In this paper, the application technology of coating was studied, and the field construction of furfural / acetone / epoxy group infiltrating and consolidation coating and solventless epoxy anticorrosive coating were improved.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU528
[Abstract]:Concrete corrosion damage occurs in many fields, such as basic construction, road and bridge, water conservancy and hydropower, ocean engineering and so on. Corrosion not only causes huge economic losses, but also threatens the safety of human life and property. Therefore, it is of great significance for national economy construction and national defense construction to carry out the research on corrosion prevention of concrete structure. In this paper, different reactive solvents were used as dispersing medium to prepare furfural / acetone / epoxy group infiltrated and consolidated anticorrosive materials, and methyl isobutyl ketone / epoxy group infiltrated and consolidated anticorrosive materials. Solventless epoxy anticorrosive coating. The main contents and results of this paper are as follows: firstly, furfural / acetone / epoxy group infiltrated and consolidated anticorrosive materials were prepared with furfural acetone reactive solvent and their basic physical properties, permeability and corrosion resistance were studied. The results show that furfural / acetone / epoxy group infiltrated and consolidated anticorrosive coating has excellent basic physical properties. The dry and wet bonding strength of the coating is as high as 10.9MPa and 6.9 MPA respectively. The material has good wettability with mortar and can penetrate deep 3.5mm on mortar surface. It is found that the wettability between the material and the mortar is higher than that of most organic solvents with low viscosity through the study of the permeability of the material and mortar. The coating has good corrosion resistance. The coating soaked in 10% sodium hydroxide solution and 5% sulfuric acid solution for 28 days is intact. Secondly, ketone compounds and primary amines can be condensed to form keto-imine, so epoxy resin, amine compounds and ketones can be condensed to form macromolecules. In this paper, the reactivity of different ketones in the condensation reaction system was studied. Finally methyl isobutyl ketone with both reactive activity and permeability was selected as the reactive solvent of epoxy resin to prepare methyl isobutyl ketone / epoxy group infiltrated and consolidated anticorrosive material. The effects of different glycidyl ethers and their contents on the properties of the materials, the effects of different curing agents on the properties of the materials and the effects of the condensation modification of hydroxyl aldehyde on the properties of the materials were studied. The results show that the penetration of methyl isobutyl ketone / epoxy group has good transparency and its transmittance is as high as 80%. The basic physical properties, permeability and corrosion resistance of the coatings cured with cashew phenolic amine compound curing agent were better. On the above basis, the composite properties of the coating obtained by using difunctional glycidyl ether and the ratio of 1 / 2 with methyl isobutyl ketone are the best. Thirdly, a solventless epoxy anticorrosive coating was prepared by using glycidyl ether reactive solvent A as the dispersing medium of epoxy resin, and its basic physical properties and corrosion resistance were studied. The results show that the solventless epoxy anticorrosive coating has good basic physical properties and corrosion resistance. In this paper, the application technology of coating was studied, and the field construction of furfural / acetone / epoxy group infiltrating and consolidation coating and solventless epoxy anticorrosive coating were improved.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU528
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