Hybridized aramid silicone aerogel modified flame-retardant polypropylene foaming plate and preparation method thereof

Abstract

The invention discloses a hybridized aramid silicone aerogel modified flame-retardant polypropylene foaming plate and a preparation method thereof. A hybridized aramid silicone aerogel filler in foaming materials is obtained by mixing an aramid pulp solution with a silica sol system, an aerogel compound with a porous network structure and high in toughness, heat resistance and flame retardant is finally obtained. Melt strength can be effectively increased by adding the aerogel compound into a resin system, effects of reinforcement, flame retardance, nucleation and the like are achieved, usage amount of a traditional flame retardant is reduced, porosity of the system can be effectively increased, resin foaming is facilitated, traditional flame retardant materials of molybdenum disulfide, diethyl phosphonate aluminum and the like are combined, and the lightweight polypropylene foaming composite material with good flame-retardant effect is finally prepared; the composite material is even in porosity, crush and heat resistant, resistant to wear corrosion, economic and durable and quite promising in application.

Description

technical field [0001] The invention relates to the technical field of polymer flame-retardant foaming materials, in particular to a flame-retardant polypropylene foam board modified by hybrid aramid fiber silicon airgel and a preparation method thereof. Background technique [0002] Polymer foam material is a special material composed of polymer and gas cells. Compared with ordinary polymer materials, it has the advantages of low density, high specific strength, sound insulation, shock absorption, and heat insulation. It is used in commodity packaging, lining, etc. Pads and other fields are widely used. Polymer foam materials commonly used in the market for packaging include polyethylene foam material, polypropylene foam material, polystyrene foam material, EVA foam material, etc. Among them, polypropylene foam material is an environmentally friendly Type foam material, cost-effective, can be recycled many times, and has a good application prospect. At present, the diffic...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the flame retardancy of polypropylene foam materials, many researchers have done a lot of work. The most common method is to add flame retardants to improve the flame retardancy of materials, and there are also synergistic effects of various materials to improve the flame retardancy of polypropylene. Flame retardancy, intumescent flame retardant (IFR) has the advantages of high flame retardant efficiency, low smoke, low toxicity, etc., but it has poor compatibility with PP, large usage, and easy moisture absorption, which usually leads to mechanical failure of polypropylene. The performance is greatly reduced, and the foaming process will also have an adverse effect on the melt, and the foaming effect is poor, thus affecting the performance

"Study on the Properties of Nano-Silica Reinforced and Toughened Expanded Flame-Retardant Copolymerized Polypropylene" improves the mechanical properties of expanded flame-retardant polypropylene by adding nano-silicon dioxide. Improves the adverse effects of flame retardants on polypropylene, but studies have shown that the amount of nano-silica has a crucial impact on the foaming process of polypropylene. When the amount is too large, the nanoparticles are easy to agglomerate and cause foaming rate Low, but nanomaterials that are too low can not make up for the adverse effects of flame retardants on the system, and eventually the product has a good foaming effect but poor flame retardancy, or a good flame retardant effect but poor foaming effect.

[0004] The unique nanoporous network structure of airgel makes it exhibit many unique properties in the fields of optics, heat, electricity, acoustics, etc. SiO 2 Airgel products represented by aerogels have shown great application prospects in many fields. They have various effects such as heat insulation, heat preservation, and flame retardancy. The foaming process of the material has a good promoting effect, but SiO 2 Airgel has poor mechanical properties and high brittleness, so it needs to be further modified