Boron phenolic resin modified foam aluminum foaming agent and preparation method thereof

Abstract

The boron phenolic resin modified foamed aluminum foaming agent of the present invention is composed of foamed aluminum inorganic foaming agent particles and boron phenolic resin coated on the surface of foamed aluminum inorganic foaming agent particles, and the quality of the boron phenolic resin is 100% of the foamed aluminum inorganic foaming agent. 1~30% of foaming agent quality; The preparation method of boron phenolic resin modified aluminum foam blowing agent of the present invention, step is as follows: (1) batching, (2) coating and curing, the number of times of coating and curing is 5-30 times, at least 5 times of coating and curing, to obtain boron phenolic resin modified aluminum foam foaming agent. Compared with the existing foaming agents, the boron phenolic resin modified aluminum foam foaming agent of the present invention has a thermal decomposition temperature increased by 20-70°C, and a sustained-release time increased by 60-120s, and has an excellent sustained-release effect; the prepared Aluminum foam and TiH 2 Compared with the commercially available aluminum foam prepared as a foaming agent, under the same conditions, the compressive strength is increased by 200-333%, and the energy-absorbing performance is increased by 100-164%.

Description

technical field [0001] The invention belongs to the field of foamed aluminum materials, in particular to a modified foamed aluminum foaming agent and a preparation method thereof. Background technique [0002] Aluminum foam is a new type of structural and functional material that integrates light weight, high strength, sound absorption, sound insulation, energy absorption, heat insulation, shock absorption, damping, electromagnetic shielding, etc., and can be widely used in machinery, Electronics, construction, environmental protection, metallurgy, transportation, aerospace, national defense and other fields. The melt foaming method is currently the most widely used method for preparing foamed aluminum. It has the advantages of simple process, low production cost, and easy large-scale production. Among them, TiH 2 Foaming agent is a key factor in the preparation process of foamed aluminum, and its decomposition characteristics have an important impact on the performance of ...

AI Technical Summary

Problems solved by technology

The melt foaming method is currently the most widely used method for preparing foamed aluminum. It has the advantages of simple process, low production cost, and easy large-scale production. Among them, TiH 2 Foaming agent is a key factor in the preparation process of foamed aluminum, and its decomposition characteristics have an important impact on the performance of the prepared foamed aluminum, but due to TiH 2 The decomposition temperature (450 ° C ~ 570 ° C) is much lower than the melting point of aluminum, shortening the TiH 2 The effective dispersion time in the aluminum melt makes the preparation process conditions harsh, TiH 2 Uniform dispersion in the aluminum melt also becomes very difficult, and the prepared foamed aluminum has poor pore structure uniformity and low mechanical properties, which limits the wide application and further development of foamed aluminum materials.

[0003] In order to broaden the application field of aluminum foam and promote its further development, the modification and selection of the foaming agent in the melt foaming method has always been highly valued and extensively studied by scientific researchers, and a series of theoretical studies have been achieved. results, for example, on TiH 2 Modified by oxidation treatment, although the oxidation-treated TiH 2 It can improve the sustained release effect and the production cost is low, but the TiH after oxidation treatment 2 The hydrogen content in the foaming agent decreases, which reduces the foaming ability; the patents with application numbers 201110101792.8 and 99125331.0 propose to uniformly plate nickel, cobalt, and copper on TiH through electroless plating and high-pressure hydrogen reduction. 2 On the surface, although these methods can significantly improve the TiH 2 The sustained release effect, but requires a large number of chemical reagents, complex experimental operations and large energy consumption, and the uniformity of the coating is also difficult to control, the actual preparation environment and equipment conditions are very high, the conversion from laboratory to mass production very difficult

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