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CN-121974623-A - High-heat-insulation material for wall and roof and preparation method thereof

CN121974623ACN 121974623 ACN121974623 ACN 121974623ACN-121974623-A

Abstract

The invention discloses a preparation method of a high heat insulation material for a wall body and a roof, which comprises the specific steps of firstly taking silica slag as a raw material, carrying out plasma melting and centrifugal fiber forming to obtain a fiber material, then taking carbon fiber, zirconium dioxide, graphene oxide and halloysite nanotubes as raw materials to prepare modified carbon fiber aerogel, and finally mixing raw materials such as cement, fly ash redispersible latex powder, ground calcium carbonate, hydroxypropyl methylcellulose, thixotropic lubricant, hydroxypropyl starch ether, a water reducing agent, a coagulant, a fiber material, modified carbon fiber aerogel, water and the like to prepare a plate. The plate meets the high requirements of low-carbon energy-saving buildings on wall and roof materials, greatly reduces the heat transfer coefficient, meets the energy-saving requirements of the buildings, improves the fireproof performance and prolongs the service life.

Inventors

  • LIN MIAO
  • ZHANG YANYAN
  • XU LEI
  • SHI JIALI
  • BU DIANJIE
  • XU XINYI

Assignees

  • 杭州诗杭新材料科技有限公司

Dates

Publication Date
20260505
Application Date
20260122

Claims (10)

  1. 1. The preparation method of the wall body and roof high heat insulation material is characterized by comprising the following specific steps: (1) Firstly, taking silicon slag as a raw material, and obtaining a fiber material through plasma melting and centrifugal fiber forming; (2) Preparing modified carbon fiber aerogel by taking carbon fiber, zirconium dioxide, graphene oxide and halloysite nanotubes as raw materials; (3) Finally, the raw materials of, by weight, 100 parts of cement, 8-10 parts of fly ash, 2-3 parts of redispersible emulsion powder, 5-7 parts of heavy calcium carbonate, 1-2 parts of hydroxypropyl methyl cellulose, 1-2 parts of thixotropic lubricant, 0.5-1 part of hydroxypropyl starch ether, 0.5-1 part of water reducer, 0.5-1 part of coagulant, 20-30 parts of fiber material, 10-20 parts of modified carbon fiber aerogel and 40-50 parts of water are mixed to prepare the board.
  2. 2. The method according to claim 1, wherein in the step (1), the plasma melting condition is an air atmosphere at 1500-1600 ℃ for 3-4 hours.
  3. 3. The method according to claim 1, wherein in the step (1), the method of centrifugal fiberizing comprises the steps of introducing a molten material obtained by melting plasma into a fiberizing centrifuge at a speed of 1.2 to 1.5t/h and centrifuging the molten material at a speed of 2000 to 2500r/min to form fibers.
  4. 4. The preparation method according to claim 1, wherein the specific method of step (2) is as follows: (2-1) firstly carrying out acid treatment on the carbon fiber to obtain acidified carbon fiber, and carrying out modification treatment on zirconium dioxide or halloysite nanotubes by utilizing 3-aminopropyl triethoxy silane to obtain modified zirconium dioxide and modified halloysite nanotubes; (2-2) uniformly stirring and mixing the modified zirconium dioxide, the modified halloysite nanotube, the graphene oxide, the epoxy resin and the N, N-dimethylformamide to obtain a premix; (2-3) adding the acidified carbon fiber into the premix, carrying out ultrasonic oscillation treatment, adding a reducing agent, reducing, centrifuging to obtain a precipitate, and washing with water to obtain the modified carbon fiber; and (2-4) finally, ultrasonically dispersing the modified carbon fiber in a tertiary butanol aqueous solution, homogenizing, and freeze-drying to obtain the modified carbon fiber aerogel.
  5. 5. The preparation method of the acid-treated carbon fiber according to claim 1, wherein in the step (2-1), the acid treatment method comprises the steps of adding the carbon fiber into 98% concentrated sulfuric acid with a mass concentration of 5-6 times of the weight of the carbon fiber, treating for 4-5 hours at 75-85 ℃, centrifuging to obtain a precipitate, washing the precipitate with water to be neutral, and drying to obtain the acidified carbon fiber; the modified zirconium dioxide and the modified halloysite nanotube are prepared by the following steps of firstly dispersing zirconium dioxide or the halloysite nanotube in absolute ethyl alcohol in an ultrasonic manner, then adding 3-aminopropyl triethoxysilane, stirring for 3-4 hours at 60-70 ℃, and centrifuging to obtain a precipitate, wherein the mass ratio of the zirconium dioxide or the halloysite nanotube to the absolute ethyl alcohol to the 3-aminopropyl triethoxysilane is 1:8-10:0.1-0.15; in the step (2-2), the mass ratio of the modified zirconium dioxide to the modified halloysite nanotube to the graphene oxide to the epoxy resin to the N, N-dimethylformamide is 1:0.8-1:0.5-0.7:0.8-1:90-100; In the step (2-3), the mass ratio of the acidified carbon fiber to the premix is 1:15-20, and the ultrasonic oscillation treatment condition is that 400-500W ultrasonic oscillation is carried out for 20-30 minutes; the reducing agent is hydrazine hydrate or sodium borohydride, the consumption of the reducing agent is 0.4-0.5 times of the mass of the graphene oxide, and the reducing condition is that the reducing agent is stirred and reacts for 5-6 hours at 80-85 ℃; in the step (2-4), the mass ratio of the modified carbon fiber to the tertiary butanol aqueous solution is 0.8-1:100, the mass concentration of the tertiary butanol aqueous solution is 50-60%, the homogenization treatment condition is 8000-10000 r/min for 30-40 min, the freeze drying condition is that the modified carbon fiber is frozen at-40 to-50 ℃ for 16-20 hours, and then the modified carbon fiber is transferred into a vacuum freeze dryer, and the modified carbon fiber is freeze dried for 48-56 hours under the vacuum condition of 0.3-0.5 Pa.
  6. 6. The preparation method of the invention according to claim 1, wherein the specific method of the step (3) is that the raw materials with the formula amount are uniformly mixed, formed by steam and cured.
  7. 7. The method of claim 6, wherein the steam forming is performed under a pressure of 0.3 to 0.5MPa for 30 to 40 seconds.
  8. 8. The preparation method according to claim 6, wherein the curing condition is that the temperature is 50-60 ℃ and the time is 15-20 hours.
  9. 9. The method of claim 1, wherein in step (3), the cement is Portland cement, the water reducing agent is a melamine water reducing agent or a polycarboxylate water reducing agent, and the setting accelerator is sodium silicate or aluminum silicate.
  10. 10. A wall and roof high thermal insulation material, which is characterized by being obtained by the preparation method of any one of claims 1-9.

Description

High-heat-insulation material for wall and roof and preparation method thereof Technical Field The invention belongs to the technical field of building energy conservation, and particularly relates to a high-heat-insulation material for a wall body and a roof and a preparation method thereof. Background In recent years, the problem of energy shortage is more and more prominent, and energy conservation and consumption reduction are becoming the main stream requirements of the building industry. In addition, fire resistance is critical to ensuring building safety. Therefore, the heat insulation performance and the fireproof performance are the main improvement directions of the current building materials. The conventional heat preservation and insulation method is to prepare light heat preservation aggregate by using polyphenyl foam particles and common expanded perlite, and mix the light heat preservation aggregate with mortar to prepare heat preservation mortar which is used as plastering mortar with good heat preservation and insulation effect. However, expanded perlite has strong water absorption and is very easy to pulverize, the strength is reduced along with the time, empty drum cracking occurs, and the heat preservation performance is reduced along with the time until the heat preservation performance disappears. In addition, the polyphenyl foam particles have poor fire resistance, are inflammable, generate harmful gas at high temperature, and have poor weather resistance. In order to improve the building safety, the surface of the combustible substrate can be coated with the fireproof paint to play a role in protection, so that fire spreading and spreading are prevented, but the adhesiveness of the fireproof paint is difficult to ensure, and once the fireproof paint falls off, the fireproof performance disappears. The patent CN103723993B discloses a wall heat-insulating fireproof heat-preserving material which is prepared by mixing raw materials such as expanded perlite, light ceramsite, phosphate, magnesium chloride, magnesium hydroxide, fiber, silicate, high-temperature ceramic glue, alum, fly ash and the like, wherein the fiber is wood fiber and/or aluminum silicate fiber. The technology of the patent comprises expanded perlite, and has a series of problems such as water absorption, pulverization, strength deterioration and the like, and the fireproof performance is also common. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a high-heat-insulation material for a wall body and a roof and a preparation method thereof. In order to achieve the above purpose, the present invention adopts the following technical scheme: the preparation method of the wall body and roof high heat insulation material comprises the following specific steps: (1) Firstly, taking silicon slag as a raw material, and obtaining a fiber material through plasma melting and centrifugal fiber forming; (2) Preparing modified carbon fiber aerogel by taking carbon fiber, zirconium dioxide, graphene oxide and halloysite nanotubes as raw materials; (3) Finally, the raw materials of, by weight, 100 parts of cement, 8-10 parts of fly ash, 2-3 parts of redispersible emulsion powder, 5-7 parts of heavy calcium carbonate, 1-2 parts of hydroxypropyl methyl cellulose, 1-2 parts of thixotropic lubricant, 0.5-1 part of hydroxypropyl starch ether, 0.5-1 part of water reducer, 0.5-1 part of coagulant, 20-30 parts of fiber material, 10-20 parts of modified carbon fiber aerogel and 40-50 parts of water are mixed to prepare the board. Preferably, in the step (1), the plasma melting condition is that the air atmosphere is at 1500-1600 ℃ and the treatment time is 3-4 hours. Preferably, in the step (1), the centrifugal fiber forming method comprises the steps of introducing a molten material obtained by melting plasma into a fiber forming centrifuge at a speed of 1.2-1.5 t/h, and centrifuging at a speed of 2000-2500 r/min to form fibers. Preferably, the specific method of the step (2) is as follows: (2-1) firstly carrying out acid treatment on the carbon fiber to obtain acidified carbon fiber, and carrying out modification treatment on zirconium dioxide or halloysite nanotubes by utilizing 3-aminopropyl triethoxy silane to obtain modified zirconium dioxide and modified halloysite nanotubes; (2-2) uniformly stirring and mixing the modified zirconium dioxide, the modified halloysite nanotube, the graphene oxide, the epoxy resin and the N, N-dimethylformamide to obtain a premix; (2-3) adding the acidified carbon fiber into the premix, carrying out ultrasonic oscillation treatment, adding a reducing agent, reducing, centrifuging to obtain a precipitate, and washing with water to obtain the modified carbon fiber; and (2-4) finally, ultrasonically dispersing the modified carbon fiber in a tertiary butanol aqueous solution, homogenizing, and freeze-drying to obtain the modified carbon fiber aerogel. Further