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Heat preservation board with excellent heat shielding properties for negative pressure wheel casing room
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A wheel house and insulation board technology, applied in the field of material science, can solve problems such as fire hazards, poor fire safety, and easy aging, and achieve the effects of simple preparation process, good heat insulation effect, and good flame retardancy
Inactive Publication Date: 2016-10-12
NANJING UNIV OF SCI & TECH
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Problems solved by technology
The biggest advantage of this type of organic thermal insulation material is light weight, heat insulation, and heat preservation, but the biggest defect is that it is easy to burn, easy to age, and has poor fire safety. Without flame retardant treatment, there are serious fire hazards, leading to building fire accidents.
Polyurethane rigid foam is a flammable organic thermal insulation material, which releases a large amount of toxic gas and smoke when burned, which poses a serious threat to people's life and property safety. Therefore, if its flammable fire prevention cannot be effectively and effectively solved safety issues, then rigid polyurethane foams cannot be widely promoted and applied in my country's building energy conservation
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Embodiment 1
[0027] The preparation of modified perlite adopts the following methods:
[0028] (1) Dissolving excess decanediamine in hydrochloric acid with a prepared substance concentration of 0.010mol / L, after partial protonation, decanediamine is partially protonated into one end that still has an active -NH2 group ammonia salt;
[0029] (2) Add perlite to partially protonated decanediamine solution, place it in an oil bath at 55°C, and stir with an electric mixer for 3 hours at a speed of 2000r / min; The dosage ratio is 10g: 100ml;
[0030] (3) Suction filtration, the filter cake is washed with distilled water for 3 to 4 times, dried, ground and sieved to obtain the modified perlite.
Embodiment 2
[0032] The preparation of modified perlite adopts the following methods:
[0033] (1) Dissolving excess decanediamine in hydrochloric acid with a prepared substance concentration of 0.008mol / L, after partial protonation, decanediamine is partially protonated into one end that still has an active -NH2 group ammonia salt;
[0034] (2) Add perlite to partially protonated decanediamine solution, place it in an oil bath at 50°C, and stir with an electric mixer for 4 hours at a speed of 1500r / min; The dosage ratio is 10g: 100ml;
[0035] (3) Suction filtration, the filter cake is washed with distilled water for 3 to 4 times, dried, ground and sieved to obtain the modified perlite.
Embodiment 3
[0037] The preparation of modified perlite adopts the following methods:
[0038] (1) Dissolving excess decanediamine in hydrochloric acid with a prepared substance concentration of 0.012mol / L, after partial protonation, decanediamine is partially protonated into one end that still has an active -NH2 group ammonia salt;
[0039] (2) Add perlite to partially protonated decanediamine solution, place it in an oil bath at 60°C, and stir for 2 hours with an electric mixer at a speed of 2500r / min; The dosage ratio is 10g: 100ml;
[0040] (3) Suction filtration, the filter cake is washed with distilled water for 3 to 4 times, dried, ground and sieved to obtain the modified perlite.
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Abstract
The invention provides a heat preservation board with excellent heat shielding properties for a negative pressure wheel casing room. The heat preservation board comprises a frame body, wherein an outer heat shielding layer, a core heat preservation layer and an inner heat shielding layer are sequentially arranged in the frame body from bottom to top; a heat shielding coating is arranged on the outer wall of the frame body; aerated concrete is stuffed in the outer heat shielding layer; perlite-hard polyurethane foam plastic composite heat preservation materials are stuffed in the core heat shielding layer; and silicon dioxide aerogel is stuffed in the inner heat shielding layer. The composite heat preservation material provided by the invention is simple in preparation technology, low in cost, good in flame resistance and good in heat preservation effect.
Description
technical field [0001] The invention relates to a negative-pressure wheel house insulation board with excellent heat insulation performance, belonging to the field of material science. Background technique [0002] In recent years, the use of wall insulation to achieve building energy conservation has been paid more and more attention. The country has also begun to enforce building energy conservation measures. Now the insulation materials used on a large scale in the market mainly include EPS (polystyrene foam), PS (extruded Plastic polystyrene foam) and PU (polyurethane foam). The biggest advantage of this type of organic thermal insulation material is light weight, heat insulation, and heat preservation, but the biggest defect is that it is easy to burn, easy to age, and has poor fire safety. Without flame retardant treatment, there are serious fire hazards, leading to building fire accidents. . Polyurethane rigid foam is a flammable organic thermal insulation material,...
Claims
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Application Information
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