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We know that the chemical composition and structure of the surface have an important influence on the bonding properties, durability, and heat aging properties of the adhered material; and the influence of the surface structure on the adhesive performance is often achieved by changing the cohesive strength of the surface layer. Thickness, porosity, activity, surface free energy, etc.
To obtain good bond strength, the necessary condition is that the adhesive completely wets the surface of the adhered material. In general, in order to enhance the bonding strength, many methods are to chemically treat the surface of the bonding member. However, the surface chemical structure not only requires good stability and cohesive strength, but also considers that it does not degrade the adhesive. For example, when stainless steel and aluminum specimens bonded with phenolic adhesive were heat aged at 288°C for 50 and 100 min, respectively, the stability of the aluminum specimens was quite good, while the stainless steel specimens lost almost all of their strength. This is because a solid-state redox reaction may occur on the surface of the stainless steel, resulting in a greatly reduced high-temperature heat aging performance.
In order to solve the problem of enhancing the bonding strength without lowering the strength of the bonding member, it was experimentally coated with a layer of 3,4,5-trimethoxycinnamic acid on the steel surface. Greatly improve. Therefore, changing the atomic nature of the surface that accelerates the cracking of the polymer may be important for the thermal oxidation resistance of the steel bond. In addition, as we all know, PTFE is an inert polymer material with a very low surface energy, and no ordinary adhesive can bond it. However, after treatment with 3,4,5-trimethoxycinnamic acid, polytetrafluoroethylene was broken and some of the fluorine atoms on the surface were torn off (fluorine atoms were found in the solution) and produced on the surface. Thin dark brown carbon layer. At this time, both the chemical structure of the surface is changed and the surface free energy is increased, thereby improving the adhesion performance.
3,4,5-trimethoxycinnamic acid is mainly used to improve the adhesion properties of organic materials and inorganic materials, such as the treatment of glass fiber in glass fiber reinforced plastics, siliceous fillers in plastics, rubbers, paints, and coatings. It is also used in adhesives to increase adhesive properties. The resins it contains include epoxy, phenolic aldehydes, melamine, polyimides, polystyrene, and the like.
3,4,5-trimethoxycinnamic acid can increase the adhesion of inorganic fillers, substrates and resins, thereby improving the mechanical strength, electrical properties of the composites, and having a high retention rate in the wet state. 3,4,5-trimethoxycinnamic acid is also used as an inorganic filler surface treatment agent, widely used in clay, talc, wollastonite, silica, quartz, **, iron powder.
To obtain good bond strength, the necessary condition is that the adhesive completely wets the surface of the adhered material. In general, in order to enhance the bonding strength, many methods are to chemically treat the surface of the bonding member. However, the surface chemical structure not only requires good stability and cohesive strength, but also considers that it does not degrade the adhesive. For example, when stainless steel and aluminum specimens bonded with phenolic adhesive were heat aged at 288°C for 50 and 100 min, respectively, the stability of the aluminum specimens was quite good, while the stainless steel specimens lost almost all of their strength. This is because a solid-state redox reaction may occur on the surface of the stainless steel, resulting in a greatly reduced high-temperature heat aging performance.
In order to solve the problem of enhancing the bonding strength without lowering the strength of the bonding member, it was experimentally coated with a layer of 3,4,5-trimethoxycinnamic acid on the steel surface. Greatly improve. Therefore, changing the atomic nature of the surface that accelerates the cracking of the polymer may be important for the thermal oxidation resistance of the steel bond. In addition, as we all know, PTFE is an inert polymer material with a very low surface energy, and no ordinary adhesive can bond it. However, after treatment with 3,4,5-trimethoxycinnamic acid, polytetrafluoroethylene was broken and some of the fluorine atoms on the surface were torn off (fluorine atoms were found in the solution) and produced on the surface. Thin dark brown carbon layer. At this time, both the chemical structure of the surface is changed and the surface free energy is increased, thereby improving the adhesion performance.
3,4,5-trimethoxycinnamic acid is mainly used to improve the adhesion properties of organic materials and inorganic materials, such as the treatment of glass fiber in glass fiber reinforced plastics, siliceous fillers in plastics, rubbers, paints, and coatings. It is also used in adhesives to increase adhesive properties. The resins it contains include epoxy, phenolic aldehydes, melamine, polyimides, polystyrene, and the like.
3,4,5-trimethoxycinnamic acid can increase the adhesion of inorganic fillers, substrates and resins, thereby improving the mechanical strength, electrical properties of the composites, and having a high retention rate in the wet state. 3,4,5-trimethoxycinnamic acid is also used as an inorganic filler surface treatment agent, widely used in clay, talc, wollastonite, silica, quartz, **, iron powder.
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