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CN-121975264-A - Strong acid and alkali resistant plastic material for decorating fume hood surface and preparation method thereof

CN121975264ACN 121975264 ACN121975264 ACN 121975264ACN-121975264-A

Abstract

The invention discloses a strong acid and alkali resistant plastic material for decorating a fume hood surface and a preparation method thereof, belongs to the technical field of plastic material processing, and is used for solving the technical problem that the acid and alkali resistance and the flexural modulus of the plastic material for decorating the fume hood surface in the prior art are to be further improved. According to the invention, perfluoro modified polysiloxane benzoxazine is prepared, naphthalene-containing epoxy resin and imidazole modified silicon carbide microspheres are compounded, and filler interface imidazole is utilized for in-situ catalytic synergistic curing, so that a compact organic-inorganic hybrid interpenetrating network is constructed, and the strong acid and alkali corrosion resistance and the flexural modulus of the material are remarkably improved.

Inventors

  • SU YONGGANG
  • ZHANG CAILEI
  • LIU GAILI
  • BAI YUTING
  • WANG YA

Assignees

  • 安徽省义广实验室装备制造有限公司

Dates

Publication Date
20260505
Application Date
20260312

Claims (10)

  1. 1. The preparation method of the strong acid and alkali resistant plastic material for decorating the cabinet surface of the fume hood is characterized by comprising the following steps of: S1, placing perfluorooctyl trimethoxy silane, gamma-aminopropyl triethoxy silane, ethanol and deionized water in a reaction kettle, stirring, dropwise adding tetraethoxysilane, heating the reaction kettle to reflux, carrying out heat preservation reaction for 4-6h, and carrying out post treatment to obtain an amino modified fluorosilicone resin solution; S2, placing amino modified fluorosilicone resin, paraformaldehyde and 1, 4-dioxane into a reaction kettle, stirring, dropwise adding cardanol solution, heating the reaction kettle to 85-95 ℃, reacting for 6-8 hours under heat preservation, and performing post-treatment to obtain cardanol-based benzoxazine resin; S3, placing the cardanol-based benzoxazine resin and the naphthalene-containing epoxy resin into a reaction kettle, heating the reaction kettle to 100-110 ℃, carrying out melt mixing for 20-30min, adding imidazole modified silicon carbide microspheres, stirring for 30-40min at a high speed, carrying out vacuum defoaming, heating and solidifying, and obtaining the plastic material for decorating the cabinet surface of the fume hood.
  2. 2. The method for preparing the plastic material for decorating the counter surface of the fume hood, which is resistant to strong acid and alkali according to claim 1, wherein in the step S1, the dosage ratio of the perfluoro octyl trimethoxy silane, the gamma-aminopropyl triethoxy silane, the ethanol, the deionized water and the tetraethoxysilane is 10-15g to 20-25g to 120-150mL to 25-35mL to 40-50g.
  3. 3. The preparation method of the strong acid and alkali resistant plastic material for decorating the cabinet surface of the fume hood, which is disclosed in claim 1, is characterized in that in the step S2, the dosage ratio of the amino modified fluorosilicone resin to the paraformaldehyde to the 1, 4-dioxane to the cardanol solution is 6-8g to 0.3-0.5g to 80-100mL to 18-20mL, and the cardanol solution is composed of cardanol and 1, 4-dioxane according to the dosage ratio of 1g to 2 mL.
  4. 4. The method for preparing the strong acid and alkali resistant plastic material for decorating the cabinet surface of the fume hood, which is disclosed in claim 1, is characterized in that in the step S3, the weight ratio of the cardanol-based benzoxazine resin to the naphthalene-containing epoxy resin to the imidazole-modified silicon carbide microspheres is 80-100:30-50:10-15.
  5. 5. The preparation method of the plastic material for the high-acid and alkali-resistant fume hood surface decoration, which is disclosed in claim 1, is characterized in that the preparation method of the naphthalene-containing epoxy resin comprises the steps of placing 1, 4-dihydroxynaphthalene and epichlorohydrin in a reaction kettle protected by nitrogen atmosphere, stirring, adding tetrabutylammonium bromide, heating the reaction kettle to 75-85 ℃, slowly dropwise adding sodium hydroxide aqueous solution, carrying out heat preservation reaction for 1-2h, and carrying out post-treatment to obtain the naphthalene-containing epoxy resin.
  6. 6. The preparation method of the strong acid and alkali resistant plastic material for decorating the counter surface of the fume hood, which is disclosed in claim 5, is characterized in that the dosage ratio of the 1, 4-dihydroxynaphthalene, the epichlorohydrin, the tetrabutylammonium bromide and the sodium hydroxide aqueous solution is 4-6g to 6-10g to 0.1-0.2g to 10-12mL, and the concentration of the sodium hydroxide aqueous solution is 25-30wt%.
  7. 7. The preparation method of the strong acid and alkali resistant plastic material for decorating the cabinet surface of the fume hood, which is disclosed in claim 1, is characterized in that the imidazole modified silicon carbide microsphere is prepared by the following steps: a1, placing tannic acid and deionized water into a reaction kettle, stirring, adding silicon carbide microspheres, stirring at room temperature for 3-5min, adding a zinc nitrate hexahydrate aqueous solution, adding ammonia water to adjust the pH to 8+/-0.2, stirring at room temperature for 25-35min, adding graphene oxide aqueous dispersion, and performing aftertreatment to obtain modified silicon carbide microspheres; And A2, dispersing the modified silicon carbide microspheres and methanol in a reaction kettle, adding A2-methylimidazole methanol solution, heating the reaction kettle to 30-50 ℃, stirring and reacting for 4-6 hours, and performing post-treatment to obtain the imidazole modified silicon carbide microspheres.
  8. 8. The preparation method of the strong acid and alkali resistant plastic material for decorating the counter surface of the fume hood, which is disclosed in claim 7, is characterized in that in the step A1, the dosage ratio of tannic acid, deionized water, silicon carbide microspheres, zinc nitrate hexahydrate aqueous solution to graphene oxide aqueous dispersion liquid is 0.4-0.6g:100-120mL:9-11g:18-20mL:80-100mL, the concentration of zinc nitrate hexahydrate aqueous solution is 0.03-0.05 mol/L, the concentration of graphene oxide aqueous dispersion liquid is 1-2mg/mL, and the concentration of ammonia water is 1-2mol/L.
  9. 9. The preparation method of the strong acid and alkali resistant plastic material for decorating the counter surface of the fume hood, which is disclosed in claim 7, is characterized in that in the step A2, the dosage ratio of the modified silicon carbide microspheres to the methanol to the 2-methylimidazole methanol solution is 8-10g:100-150mL:30-50mL, and the 2-methylimidazole methanol solution is composed of 2-methylimidazole and methanol according to the dosage ratio of 1g:10 mL.
  10. 10. The plastic material for the strong acid and alkali resistant fume hood face decoration, which is characterized in that the plastic material for the strong acid and alkali resistant fume hood face decoration is prepared by adopting the preparation method of the plastic material for the strong acid and alkali resistant fume hood face decoration as set forth in any one of claims 1 to 9.

Description

Strong acid and alkali resistant plastic material for decorating fume hood surface and preparation method thereof Technical Field The invention relates to the technical field of plastic material processing, in particular to a strong acid and alkali resistant plastic material for decorating a cabinet surface of a fume hood and a preparation method thereof. Background The laboratory fume hood is used as an extremely important local exhaust device in a chemical laboratory, the counter is in direct contact environment of various high-concentration acids, alkalis, strong oxidants and organic solvents for a long time, along with the evolution of modern chemical analysis technology and the increase of experimental strength, extremely strict requirements are put forward on the chemical corrosion resistance of plastic materials for counter decoration, the current industry development trend is changed from early ceramic and natural stone to high-performance polymer composite materials, the important point is to improve the chemical inertness and physical stability of the materials in the extreme chemical environment, and particularly, the traditional counter materials are aiming at solving the conditions of easy etching, foaming and the like of surfaces aiming at strong corrosive media such as hydrofluoric acid, concentrated nitric acid and the like, so as to realize maintenance-free and high reliability of the whole life cycle of the materials. Currently, phenolic resin solid physicochemical plates, epoxy resin plates or polypropylene (PP) plates are mostly adopted as a cabinet surface decoration material of a fume hood, in order to further improve the corrosion resistance and mechanical strength of matrix resins, the materials are usually reinforced by a physical blending mode, and zeolite imidazole ester skeleton structure materials (ZIF-8) are used as typical representatives of metal organic frame Materials (MOFs), have excellent chemical stability, regular pore channel structures and potential surface catalytic activity, and are also gradually used for functional modification of polymer materials, however, if the materials are only adopted by a physical blending method, the materials are difficult to combine compactly due to large difference of surface energy between the materials and the resin, micro cracks are very easy to peel off or generate under the action of mechanical external force, so that the materials are wholly invalid. In the prior art, because the inorganic filler is hydrophilic and the resin is hydrophobic and natural incompatible, the inorganic filler and the resin lack of chemical bonding and are only weakly and physically interlocked, microscopic defects exist at the interface, when the inorganic filler is contacted with strong acid and alkali for a long time, capillary permeation is generated by a corrosive medium through an interface gap, so that the internal swelling and interface dissociation failure of the material are caused, in addition, the contradiction between high crosslinking density and high toughness is difficult to balance in the traditional single resin system, the high-density material has large internal stress and high brittleness, and brittle fracture is extremely easy to occur under the working condition of cold and hot impact or mechanical stress of a ventilation cabinet. In view of the technical drawbacks of this aspect, a solution is now proposed. Disclosure of Invention The invention aims to provide a strong acid and alkali resistant plastic material for decorating a cabinet surface of a fume hood and a preparation method thereof, which are used for solving the technical problem that the acid and alkali resistance and the bending modulus of the plastic material for decorating the cabinet surface of the fume hood in the prior art are required to be further improved. The invention aims at realizing the technical scheme that the preparation method of the plastic material for decorating the cabinet surface of the ventilating cabinet resistant to strong acid and alkali comprises the following steps: S1, placing perfluorooctyl trimethoxy silane, gamma-aminopropyl triethoxy silane, ethanol and deionized water in a reaction kettle, stirring, dropwise adding tetraethoxysilane, heating the reaction kettle to reflux, carrying out heat preservation reaction for 4-6h, and carrying out post treatment to obtain an amino modified fluorosilicone resin solution; S2, placing amino modified fluorosilicone resin, paraformaldehyde and 1, 4-dioxane into a reaction kettle, stirring, dropwise adding cardanol solution, heating the reaction kettle to 85-95 ℃, reacting for 6-8 hours under heat preservation, and performing post-treatment to obtain cardanol-based benzoxazine resin; S3, placing the cardanol-based benzoxazine resin and the naphthalene-containing epoxy resin into a reaction kettle, heating the reaction kettle to 100-110 ℃, carrying out melt mixing for 20-30min, adding imidazole modifie