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CN-121976417-A - Modified ceramic nanofiber paper and preparation method thereof

CN121976417ACN 121976417 ACN121976417 ACN 121976417ACN-121976417-A

Abstract

The invention relates to the technical field of ceramic nanofiber paper, and in particular discloses modified ceramic nanofiber paper and a preparation method thereof, wherein the preparation method comprises the following steps of (1) preparing zirconia nanofiber paper slurry, namely dispersing zirconia chopped fibers in deionized water, adding a dispersing agent and a binder, and stirring and dispersing uniformly to obtain zirconia nanofiber paper slurry; the preparation method of the ceramic nanofiber paper comprises the steps of (1) removing impurities from zirconia nanofiber paper slurry obtained in the step, adding cellulose fibers, fluffing 8000-10000 revolutions to obtain slurry, carrying out wet papermaking forming, filtering and dewatering, squeezing and drying to obtain ceramic nanofiber paper, and (3) preparing modified ceramic nanofiber paper, namely carrying out surface modification treatment on the ceramic nanofiber paper, and carrying out rolling or slicing packaging to obtain the modified ceramic nanofiber paper. The modified ceramic nanofiber paper disclosed by the invention has the advantages of remarkably improved mechanical properties, good heat resistance and stable structure.

Inventors

  • ZHAO XINGLEI
  • JIANG PAN
  • WANG PENG
  • CHEN XINYI
  • JIANG XUBO

Assignees

  • 嘉兴富瑞邦新材料科技有限公司

Dates

Publication Date
20260505
Application Date
20260209

Claims (10)

  1. 1. A method for preparing modified ceramic nanofiber paper, which is characterized by comprising the following steps: (1) The preparation of the zirconia nanofiber pulp comprises the steps of dispersing zirconia chopped fibers in deionized water, adding a dispersing agent and a binder, and stirring and dispersing uniformly to obtain zirconia nanofiber pulp; (2) Removing impurities from the zirconia nanofiber paper slurry obtained in the step (1), adding cellulose fibers, fluffing 8000-10000 revolutions to obtain slurry, and carrying out wet papermaking forming, suction filtration dehydration, squeezing and drying to obtain ceramic nanofiber paper; (3) The preparation of the modified ceramic nanofiber paper comprises the steps of carrying out surface modification treatment on the ceramic nanofiber paper, and rolling or slicing and packaging to obtain the modified ceramic nanofiber paper.
  2. 2. The method for preparing modified ceramic nanofiber paper according to claim 1, wherein in the step (1), the dispersing agent is modified polyethylene oxide, and the preparation steps are as follows: 1) Adding toluene and allyl glycidyl ether into a reactor, adding ethylene oxide under stirring, adding a catalyst, reacting for 8-12 hours at 40-80 ℃, precipitating with n-hexane, washing, and drying to constant weight to obtain a copolymer; 2) And (3) adding the copolymer obtained in the step (1) and the acryloyloxyethyl dimethyl benzyl ammonium chloride into a reactor, adding toluene and an initiator, reacting for 2-6 hours at 40-60 ℃, washing by absolute ethyl alcohol, and drying to constant weight to obtain the dispersing agent.
  3. 3. The method for preparing modified ceramic nanofiber paper according to claim 2, wherein in the step 1), the mass ratio of allyl glycidyl ether to ethylene oxide is (2-2.5): 11.
  4. 4. The preparation method of the modified ceramic nanofiber paper according to claim 2, wherein in the step 2), the mass ratio of the copolymer to the acryloyloxyethyl dimethyl benzyl ammonium chloride is 10 (2-4).
  5. 5. The method for preparing the modified ceramic nanofiber paper according to claim 1, wherein in the step (3), the step of surface modification treatment is that the ceramic nanofiber paper is immersed in a solution of a fiber modifier, treated for 1-5 min at-15 to-10 ℃, immersed in absolute ethyl alcohol for 5-10 min, washed with deionized water, dried and cooled to room temperature, and the addition amount of the fiber modifier in the solution of the fiber modifier is 0.1-0.2% of the mass of the ceramic nanofiber paper.
  6. 6. The method for preparing the modified ceramic nanofiber paper according to claim 5, wherein the preparation steps of the fiber modifier are as follows: Mixing alkali, urea and water to obtain a mixed aqueous solution, transferring the mixed aqueous solution to a reactor after precooling, adding cellulose fibers, stirring and mixing until the mixture is uniform, adding 2, 3-epoxypropyl trimethyl ammonium chloride and isopropanol, heating to 50-80 ℃, reacting for 4-7 h, and carrying out suction filtration, washing with absolute ethyl alcohol and drying to obtain the fiber modifier.
  7. 7. The preparation method of the modified ceramic nanofiber paper according to claim 6, wherein the mass ratio of the cellulose fiber to the 2, 3-epoxypropyl trimethyl ammonium chloride is 1 (1.1-1.5).
  8. 8. The method for producing a modified ceramic nanofiber paper according to claim 1, wherein the mass ratio of the cellulose fiber to the zirconia chopped fiber in step (1) is (0.6 to 2): 1 in step (2).
  9. 9. The method for preparing the modified ceramic nanofiber paper according to claim 1, wherein the diameter of the zirconia chopped fiber is 5-10 μm and the length is 1-5 mm.
  10. 10. A modified ceramic nanofiber paper obtainable by the process of any one of claims 1-9.

Description

Modified ceramic nanofiber paper and preparation method thereof Technical Field The invention belongs to the technical field of ceramic nanofiber paper, and particularly relates to modified ceramic nanofiber paper and a preparation method thereof. Background The ceramic fiber paper is a heat-insulating ceramic fiber product with excellent texture, which is prepared by taking papermaking ceramic fibers with extremely low slag ball content as raw materials and carrying out the procedures of pulping, deslagging, pulp preparation, fourdrinier wire forming, vacuum dehydration, drying, shearing, rolling and the like, and has excellent application prospects in the fields of high-temperature heat insulation, isolation, sealing, lining materials and the like. The invention patent with the application number 201610045512.9 discloses zirconia fiber paper for low-temperature cryogenic insulation, a preparation method and application thereof, wherein the mass content of ZrO 2 of the zirconia fiber paper is more than or equal to 85%, and the diameter of the zirconia fiber is 0.5-2.5 mu m. The zirconia fiber paper has the advantages of strong radiation resistance, good heat insulation performance, small vacuum deflation rate, no combustion in open fire, and stable property at low temperature such as liquid nitrogen, liquefied natural gas and the like. The invention patent with the application number 202110481375.4 discloses a fiber paper, a preparation method thereof and a preparation method using the fiber paper, which comprises the following steps of (1) uniformly mixing oxide sol, a polymer and a solvent, then carrying out electrostatic spinning to obtain an oxide ceramic fiber paper green body, (2) carrying out hydrothermal reaction on the oxide ceramic fiber paper green body obtained in the step (1) and a titanium solution in an acidic environment, and sintering the obtained product to obtain the fiber paper. The fiber paper has super-strong hydrophilicity and good flexibility, and can be used in oil-water separation materials. The above technology for zirconia fiber paper is mainly focused on special properties, but in practical application, the mechanical strength of zirconia fiber paper is considered first. Because zirconia fiber surfaces are smooth, the strength is maintained by only mutually connecting the fibers, the bonding strength among the fibers is insufficient, the comprehensive performance of the zirconia ceramic nanofiber paper can be adversely affected, various auxiliaries such as polyethylene oxide are often added in the prior art to improve the comprehensive performance of the zirconia ceramic nanofiber paper, however, the retention effect of the polyethylene oxide is general, and the improvement of the mechanical performance of the ceramic nanofiber paper is not facilitated. In view of this, the invention discloses a modified ceramic nanofiber paper and a preparation method thereof. Disclosure of Invention Aiming at the defects of the prior art, the invention provides modified ceramic nanofiber paper and a preparation method thereof. The modified ceramic nanofiber paper disclosed by the invention has the advantages of remarkably improved mechanical properties, good heat resistance and stable structure. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: In one aspect, the invention provides a method for preparing a modified ceramic nanofiber paper, comprising the following steps: (1) The preparation of the zirconia nanofiber pulp comprises the steps of dispersing zirconia chopped fibers in deionized water, adding a dispersing agent and a binder, and stirring and dispersing uniformly to obtain zirconia nanofiber pulp; (2) Removing impurities from the zirconia nanofiber paper slurry obtained in the step (1), adding cellulose fibers, fluffing 8000-10000 revolutions to obtain slurry, and carrying out wet papermaking forming, suction filtration dehydration, squeezing and drying to obtain ceramic nanofiber paper; (3) The preparation of the modified ceramic nanofiber paper comprises the steps of carrying out surface modification treatment on the ceramic nanofiber paper, and rolling or slicing and packaging to obtain the modified ceramic nanofiber paper. In some embodiments of the invention, in step (2), the dispersant is a modified polyethylene oxide, and the dispersant is prepared as follows: 1) Adding toluene and allyl glycidyl ether into a reactor, adding ethylene oxide under stirring, adding a catalyst, reacting for 8-12 hours at 40-80 ℃, precipitating with n-hexane, washing, and drying to constant weight to obtain a copolymer; 2) And adding the copolymer and the acryloyloxyethyl dimethyl benzyl ammonium chloride into a reactor, adding toluene and an initiator, reacting for 2-6 hours at 40-60 ℃, washing with absolute ethyl alcohol, and drying to constant weight to obtain the dispersing agent. Preferably, the preparation steps of the dispersing agent are a