In recent years, adhesives have been developed for special applications such as low viscosity, high strength, impact resistance, and flame retardancy. With the demand for higher performance of underwater adhesives, nanofillers have been added to epoxy adhesives to greatly improve adhesiveness. Coating strength, wear resistance, corrosion resistance and other properties, and the cost of the adhesive are being researched by the industry.
The rapid development of nanofiller technology has become a new topic in the research of nanoparticle fillers, of which the intercalation compound method has been the most widely studied. As early as the 1980s, some people in the world used solution intercalation to make polyamide/clay nanocomposites. Subsequently, polystyrene/clay nanocomposites were prepared by melt intercalation, and the kinetics of melt intercalation was studied. The Institute of Chemistry, Chinese Academy of Sciences also prepared nylon-6/montmorillonite nanocomposites, silicone rubber/montmorillonite composites, and studied their properties and structures. Due to the small size of the dispersed phase in the matrix and the strong interfacial adhesion between the organic and inorganic phases in this method, there are many properties that are superior to conventional composites.
There are many publications on underwater adhesives, but no epoxy/NMT has been found. The study of underwater adhesives shows that when cured in air, the shear strength of nano-adhesives is greatly improved compared to ordinary fillers. The synergistic shear strength is comparable to that of the MMT alone, but it has a good stability, and due to the addition of common fillers, the material cost can be greatly reduced; when cured in water, due to the montmorillonite film Layer peeling may be affected, so that the shear strength of single MMT is lower than that of general fillers; when talcum powder and MMT work together, due to the hydration of talc and the strengthening effect of nanoparticles, the strength in water is good. Stability, little change in shear strength over time. It can be seen that the solidified shear strength in air is much better than that in water, and the synergistic effect of the two fillers on the shear strength is high and the stability is good. Epoxy underwater adhesives should be cured in the air whenever possible. At the same time, the talc powder and MMT are added in the basic formula of the epoxy resin underwater adhesive, and the ratio is 10:1, which can achieve good results.
It can be foreseen that many excellent properties of nanofillers will directly affect the future development of our adhesives.
The rapid development of nanofiller technology has become a new topic in the research of nanoparticle fillers, of which the intercalation compound method has been the most widely studied. As early as the 1980s, some people in the world used solution intercalation to make polyamide/clay nanocomposites. Subsequently, polystyrene/clay nanocomposites were prepared by melt intercalation, and the kinetics of melt intercalation was studied. The Institute of Chemistry, Chinese Academy of Sciences also prepared nylon-6/montmorillonite nanocomposites, silicone rubber/montmorillonite composites, and studied their properties and structures. Due to the small size of the dispersed phase in the matrix and the strong interfacial adhesion between the organic and inorganic phases in this method, there are many properties that are superior to conventional composites.
There are many publications on underwater adhesives, but no epoxy/NMT has been found. The study of underwater adhesives shows that when cured in air, the shear strength of nano-adhesives is greatly improved compared to ordinary fillers. The synergistic shear strength is comparable to that of the MMT alone, but it has a good stability, and due to the addition of common fillers, the material cost can be greatly reduced; when cured in water, due to the montmorillonite film Layer peeling may be affected, so that the shear strength of single MMT is lower than that of general fillers; when talcum powder and MMT work together, due to the hydration of talc and the strengthening effect of nanoparticles, the strength in water is good. Stability, little change in shear strength over time. It can be seen that the solidified shear strength in air is much better than that in water, and the synergistic effect of the two fillers on the shear strength is high and the stability is good. Epoxy underwater adhesives should be cured in the air whenever possible. At the same time, the talc powder and MMT are added in the basic formula of the epoxy resin underwater adhesive, and the ratio is 10:1, which can achieve good results.
It can be foreseen that many excellent properties of nanofillers will directly affect the future development of our adhesives.