Preparation method of hollow glass microbead-reinforced phenolic foam composite material

Abstract

The invention discloses a preparation method of a hollow glass microbead-reinforced phenolic foam composite material, belonging to the field of foam materials. The preparation method comprises the following steps: copolymerizing phenol and formaldehyde serving as comonomers and hollow glass microbeads serving as reinforcing materials so as to get modified A-stage phenolic resin in the presence of an alkaline catalyst; and further mixing the A-stage phenolic resin with a surfactant, a foaming agent, a nano-nucleating agent and an acid curing agent according to a formula, adding into a mold, and performing hot-pressing, foaming and molding to prepare the hollow glass microbead-reinforced phenolic foam. According to the preparation method disclosed by the invention, by reinforcing the hollow glass microbeads, the compressive strength, the bending strength and the impact strength of the phenolic foam are improved; the bubble hole structure of the phenolic foam is improved, the bubble hole size is reduced; and bubble holes are more uniform; and the fire resistance of the phenolic foam can not be reduced. The prepared foam can be applied to high-tech technical fields of aerospace, high-speed trains, building heat insulation, ships and the like.

Description

technical field [0001] The invention belongs to the field of foam materials, and in particular relates to a method for preparing a hollow glass microsphere-reinforced phenolic foam composite material. Background technique [0002] In recent years, with the rapid development of society, the number of high-rise buildings has increased, which has also led to frequent occurrence of fire incidents in high-rise buildings, which has caused a huge threat to people's lives and property safety. Obviously, polyurethane, polystyrene, polychlorinated Traditional thermal insulation foam materials such as ethylene, which are common in the market, can no longer meet the needs of social development due to their shortcomings such as flammability, large smoke generation, and the generation of toxic gases when the foam is burned. Phenolic foam has become one of the fastest growing varieties of foam plastics because of its incomparable advantages over other foam plastics. [0003] Phenolic foam...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional phenolic foam has shortcomings such as brittleness, fragility, and low strength, which limits the use of traditional phenolic foam.

In terms of phenolic resin modification, although there have been a lot of research work at home and abroad, most of them are concentrated on the toughening of phenolic resin, and the strength of phenolic foam is not significantly improved.