A kind of fiber-reinforced composite thermal insulation material and preparation method thereof

Abstract

The invention discloses a fiber-reinforced composite heat-insulating material and a preparation method thereof. The raw materials are 30-75 parts of silica airgel powder, 5-10 parts of potassium hexatitanate whisker, electrospun poly 8-15 parts of vinylidene fluoride micro-nano fibers, 45-65 parts of modified sepiolite fibers, 35-45 parts of modified nano-alumina fibers and 1-9 parts of aluminum dihydrogen phosphate; the modified sepiolite fibers The parts by weight of each raw material are respectively 15-30 parts of sepiolite, 1-8 parts of N,N-dimethylformamide and 2-10 parts of flame retardant polymer; The parts by weight of raw materials are 30-45 parts of 3,9-dichloro-2,4,8,10-tetraoxo-3,9-diphosphorus spiro[5.5]undecane, 3-8 parts of antioxidant and Dimethyl sulfoxide 15‑30 parts; by hot pressing two layers of heat insulation materials together, the heat insulation performance of the heat insulation material is improved, the thermal conductivity of the heat insulation material is effectively reduced, and the prepared heat insulation is also improved The compressive strength and tensile strength of the material also have the special performance of reflecting energy very well.

Description

technical field [0001] The invention relates to the technical field of heat insulation materials, in particular to a fiber-reinforced composite heat insulation material and a preparation method thereof. Background technique [0002] Thermal insulation materials are widely used in metallurgy, non-ferrous metals, machinery, petrochemical, electric power and other fields. The heat insulation material has the characteristics of low density, high flexibility, waterproof, etc., can collect excess heat, has good randomness, has no cavity, and can avoid tearing and falling off under negative wind pressure. Thermal insulation materials are generally divided into inorganic and organic. Organic insulation materials mainly include polyurethane foam, polystyrene board, phenolic foam, etc. Inorganic heat insulation materials are mainly concentrated in materials with certain heat insulation effects such as airgel felt, glass wool, rock wool, expanded perlite, and micro-nano heat insulati...