A kind of aramid pulp fiber reinforced phenolic foam composite material and preparation method thereof

Abstract

The invention discloses an aramid-fiber pulp fiber reinforced phenolic foam composite material and a preparation method thereof and belongs to the field of material science and processing. The composite material contains the following raw material ingredients: expandable phenolic resin, a surfactant, a curing agent, a foamer and aramid-fiber pulp fibers. The method comprises the following main preparation steps: firstly, uniformly mixing the expandable phenolic resin with the surfactant so as to form a material A; then, adding the aramid-fiber pulp fibers into the material A, and carrying out uniform mixing thoroughly so as to form a material B; then, sequentially adding the curing agent and the foamer into the material B under certain temperature conditions, and carrying out high-speed-stirring uniform mixing in a short time so as to form a material C; and finally, pouring the material C into a preheated mold, and carrying out hermetic and constant-temperature foaming curing, thereby obtaining the aramid-fiber pulp fiber reinforced phenolic foam composite material. The aramid-fiber pulp fiber reinforced phenolic foam composite material and the preparation method thereof have the advantages that due to the aramid-fiber pulp fiber reinforcement, the compression mechanical properties of foam can be obviously improved by the good bonding of fibers and resin, and meanwhile, the heat stability is improved; and the disclosed preparation method is simple in process and low in production cost, so that popularization and application are facilitated.

Description

technical field [0001] The invention relates to a foam material, more specifically, the mechanical properties of the foam composite material are greatly improved by adding a small amount of aramid pulp fiber, which meets people's requirements for high-strength, low-cost, and good-dimensional stability insulation materials, and belongs to the material Science and processing fields. technical background [0002] Phenolic foam plastic is a new type of fireproof and thermal insulation material in recent years. It is easy to process and shape, low in price, good in chemical stability, low in thermal conductivity, flame retardant, heat resistant, low in smoke rate when burning, low in toxicity and non-melting. It is known as the "King of Thermal Insulation Materials" because of its excellent properties such as dripping. With the widespread implementation of building energy-saving technologies, the application of phenolic foam in external wall insulation systems has gradually been...

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Problems solved by technology

[0004] At present, the research on fiber-reinforced phenolic foam mostly uses chopped glass fiber, and the modification effect is not very obvious. So far, there has been no research on the application of aramid pulp fiber to the reinforcement and modification of foam materials.

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