【作者】 李彬；

【导师】 张超灿；

【作者基本信息】 武汉理工大学 ， 材料学， 2012， 硕士

【摘要】 环氧树脂具有优异的物理化学性质因而在国防、国民经济的各个领域被用作树脂浇铸体料、粘结剂、涂料等。水性环氧树脂VOC含量低,在环保要求日益严格的今天得到了更加广泛的关注,因此也成为了研究的重点。本文旨在通过一种比较简单可控的方法制备出一种具有高透明性、高存储稳定性、高固化性能的水性环氧树脂体系。本文主要通过向酚醛型环氧树脂中加入一定量的环氧活性稀释剂669后搅拌均匀,然后加入一定量的二乙醇胺使之与F51上的环氧基团发生开环反应。待反应完全后向改性树脂体系中加入一定量的醋酸酸化,然后加入一定量的去离子水稀释,即制备出水性环氧树脂体系,整个过程中要严格控制反应温度、反应时间以及加料方式。二乙醇胺与环氧活性稀释剂669的加入量影响着水性环氧树脂的水溶性和固化性能,因此确定二乙醇胺和坏氧活性稀释剂669的量使得水性环氧树脂同时具备较好的水溶性和固化性能是本文研究的重点。本文通过均相模拟采用酸碱滴定环氧值的方法确定了最佳的反应温度为65℃、最佳的反应时间为2.5h。本文对所制备的水性环氧树脂体系做了水溶性测试,发现水性环氧树脂的水溶性随着二乙醇胺加入量的增加而增加；随着669用量的增加呈现出先增加后降低的趋势,当669的加入量占F51量的40%时体系的水溶性达到最大值,10g去离子水可以溶解12.5g水性环氧树脂体系。当669的加入量小于F51量的40%、二乙醇胺中活泼氢与F51环氧基团的摩尔比大于1.1：3时制备出的水性坏氧树脂体系可以存储9个月以上。同时,本文也研究了改性环氧树脂体系固化物的力学性能。选用固化剂三乙烯四胺,在室温固化6h后60℃固化8h后测得树脂固化物的拉伸、剪切强度随着669用量的增加呈现出先增加后减小的趋势,669的用量为F51用量的40%时达到最大值、断裂伸长率随着669的用量的增加而增加；树脂固化物的拉伸剪切强度随着二乙醇胺用量的增加而减小、断裂伸长率随着二乙醇胺的用量的增加而增加。综合比较了用三乙烯四胺、聚酰胺固化剂TY-650、聚醚二元胺类固化剂D230固化后水性环氧树脂体系固化物的力学性能,得出用D230固化后树脂体系固化物的综合性能最佳,其拉伸强度为59.67MPa、剪切强度为8.49MPa、断裂伸长率为12.6%。另外,本文还研究了水性环氧树脂固化膜的附着力、硬度、耐水性、水接触角等相关性能。更多还原

【Abstract】 The epoxy resin is used as composite materials, coating and adhesive in many fields of national defense and national economy for the excellent physical properties and chemical properties. As the environmental protection became more and more strict, the waterborne epoxy resin was concerned wildly and became the focus of the research for the lower VOC at present.The purpose of this paper is synthesis a kind of waterborne epoxy resin system with high transparency, high storage stability and high curing properties through a simple and controllable means. In this paper, Add a certain amount of phenolic type epoxy resin F51to flash with three neck, then add some epoxy resin active diluents669to flash with three neck and then stir many minutes, when this two kinds of epoxy resin mix adequately, add a certain amount of two ethanol amine to this epoxy resin system. The two ethanol amine will consume some epoxy groups of the F51, when this process react completely, add some acetic acid to this whole system for acidification, then add some deionized water to dilute this epoxy resin system. After this whole process a kind of waterborne epoxy resin will be prepared. We should control the reaction time, reaction temperature and the ways of add materials very strictly. The amount of two ethanol amine and epoxy resin active diluents669affect the water solubility and curing properties of the waterborne epoxy resin so the important thing of this paper is find out the amount of two ethanol amine and epoxy resin active diluents669to ensure the waterborne epoxy resin has both excellent water solubility and curing properties.In this paper we find out the best reaction temperature65℃and best reaction time2.5h through the means of Acid-base titration at the uniform interface system. After we test the water solubility of the waterborne epoxy resin we find out some laws. When add the amount of the two ethanol amine its water solubility will increase, when add the amount of the669its water solubility will increase firstly then decrease. Under the condition of the amount of the669less than40%of F51 and the active H of the two ethanol amine to the epoxy groups more than1.1:3, we can synthesis the waterborne epoxy resin that can be storage more than9months.We research the tensile performance and the shear performance of the waterborne epoxy resin. The cure agent is three ethylene four amine(TETA) and the cure technology is keep the curing system react6h at room temperature and the keep the curing system react8h at60℃. We find out some laws, add the amount of the669the number of tensile strength and shear strength of the curing system will increase firstly then decrease, when the amount of the669reach to40%of F51, the test value reach to maximum. The elongation at break will increase. When add the amount of the two ethanol amine, the number of tensile strength and shear strength of the curing system will decrease but the elongation at break will increase. After we compare the performance of the three kinds of curing system with TETA, TY-650, D-230respectively. We find out the waterborne epoxy resin curing system has the most excellent performance with agent of D-230. The excellent value of tensile strength reach to59.67MPa, the valve of the shear strength reach to8.49MPa, the elongation at break reach to12.6%.In addition, we research the adhesion, hardness, resistance water performance, water contact angle of the film of the waterborne epoxy resin cure system.更多还原