Search

CN-120590828-B - Self-decoloring wallpaper base film and preparation method thereof

CN120590828BCN 120590828 BCN120590828 BCN 120590828BCN-120590828-B

Abstract

The application relates to the field of building materials, and particularly discloses a self-decoloring wallpaper base film and a preparation method thereof. A self-decoloring wallpaper base film and a preparation method thereof comprise the following steps of (1) preparing a color developing solution, (2) preparing a hydrophobic material, namely mixing fluorine modified acrylic resin, an emulsifying agent, a dispersing agent, a leveling agent, a defoaming agent and water, shearing and emulsifying at a speed of 5800-6000r/min to obtain fluorine modified acrylic resin emulsion, dropwise adding the color developing solution while stirring, uniformly mixing to obtain the hydrophobic material, and (3) preparing a hydrophilic material, namely mixing the water-based acrylic resin, the emulsifying agent, the dispersing agent, the leveling agent, the defoaming agent and the water, shearing and emulsifying, and then adding a pH regulator to adjust the pH to 8-10 to obtain the hydrophilic material.

Inventors

  • ZHAN GUOFENG
  • WU TONGMING
  • HONG WEI
  • ZHAN XIAOYING

Assignees

  • 嘉力丰科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250521

Claims (5)

  1. 1. A preparation method of a self-decoloring wallpaper base film is characterized by comprising the following steps: (1) Adding a color development substance into 8-14wt% sodium hydroxide solution, heating to 40-45 ℃, and stirring for 1-1.2h to obtain a color development solution, wherein the color development substance is one of 1-naphtholphthalein, thymolphthalein and alpha-naphtholphthalein; (2) The preparation of the hydrophobic material comprises the steps of mixing fluorine modified acrylic resin, an emulsifying agent, a dispersing agent, a leveling agent, a defoaming agent and water, shearing and emulsifying at the speed of 5800-6000r/min to obtain fluorine modified acrylic resin emulsion, dropwise adding a developing solution while stirring, and uniformly mixing to obtain the hydrophobic material; (3) The preparation of the hydrophilic material comprises the steps of mixing water-based acrylic resin, an emulsifying agent, a dispersing agent, a leveling agent, a defoaming agent and water, shearing and emulsifying at the speed of 4600-5200r/min, and adding a pH regulator to adjust the pH to 8-10 to prepare the hydrophilic material; (4) Coating the hydrophobic material on the wall surface in a spraying, rolling or brushing mode, forming a hydrophobic layer with the thickness of 50-300 mu m after fully drying under the ventilation condition, coating the hydrophilic material on the hydrophobic layer in a spraying, rolling or brushing mode, forming a hydrophilic layer with the thickness of 100-300 mu m after fully drying under the ventilation condition, coating the hydrophobic material on the hydrophilic layer in a spraying, rolling or brushing mode, and forming the hydrophobic layer with the thickness of 50-300 mu m after fully drying under the ventilation condition; the hydrophilic material and the hydrophobic material also comprise humidity response fibers, the humidity response fibers are water absorption enhancer modified polyamide fibers, and the water absorption enhancer is antibacterial modified oxidized microcrystalline cellulose/carboxymethyl chitosan composite material; the preparation method of the water absorption enhancer comprises the following steps of mixing an aqueous solution of carboxymethyl chitosan with a dispersion liquid of oxidized microcrystalline cellulose, stirring for 1h under the water bath condition of 60 ℃, adding an antibacterial additive, cooling, standing for 4-6h, and freeze-drying to obtain the water absorption enhancer; The antibacterial additive is zeolite modified chitosan/sodium alginate microspheres loaded with antibacterial substances, the addition amount of the antibacterial additive is 12.35-16.27wt% of the water absorption enhancer, and the antibacterial substances are compounded by lemon grass essential oil and oregano essential oil with the mass ratio of (0.8-1.2) (0.9-1.1).
  2. 2. The method for producing a self-decolorizing wallpaper base film according to claim 1, wherein the moisture responsive fiber is added to the hydrophilic material in an amount of 11.25 to 13.27wt% and the moisture responsive fiber is added to the hydrophobic material in an amount of 5.68 to 6.95wt%.
  3. 3. The method for preparing the self-decoloring wallpaper base film according to claim 1, wherein the method for preparing the humidity response fiber comprises the following steps of stirring and dissolving polyamide in formic acid solution to form a spinning solution with the concentration of 12-14wt%, adding a water absorption enhancer into the spinning solution, carrying out electrostatic spinning under the conditions of 20-23kV voltage, 10-12cm receiving distance, 0.7-0.8mm spinning diameter and 0.8-1mL/h spinning speed after uniform ultrasonic dispersion, and obtaining the humidity response fiber.
  4. 4. The method for preparing the self-decolorizing wallpaper base film according to claim 1, wherein the humidity-responsive fiber is further processed by dispersing the humidity-responsive fiber in 9% acetic acid solution, performing ultrasonic vibration for 1h, filtering, washing and drying.
  5. 5. A self-decoloring wallpaper base film, which is characterized by being prepared by the preparation method of the self-decoloring wallpaper base film according to any one of claims 1 to 4.

Description

Self-decoloring wallpaper base film and preparation method thereof Technical Field The application relates to the field of building materials, in particular to a self-decoloring wallpaper base film and a preparation method thereof. Background The wallpaper base film is a special wall surface treatment material, has the characteristics of alkali resistance, moisture resistance, mildew resistance and the like, and can form a protective film on a wall surface, so that the protective film can effectively prevent moisture and humidity in the wall surface from being externally permeated, thereby protecting wallpaper or other wall surface decoration materials from damage, the wallpaper base film can enable the wall surface to be smooth, has the moisture-proof and mildew-proof effects, can effectively improve the adhesive force and the service life of the wallpaper, and improves the overall aesthetic degree of the wall surface. The existing wallpaper base film is usually colorless and transparent, the wallpaper is paved without color influence after brushing, but the use of the wallpaper is usually integrated, such as the brushing of the wallpaper base film is in a missing state, the wall paper is easy to fall off, meanwhile, the waterproof performance of the wallpaper base film is poor, and the wallpaper base film and the wallpaper are easy to fall off together, so that the service life and the attractiveness of the whole wallpaper are influenced. Disclosure of Invention In order to improve the service life and construction convenience of the wallpaper base film, the application provides a self-decoloring wallpaper base film and a preparation method thereof. In a first aspect, the application provides a method for preparing a self-decoloring wallpaper base film, which adopts the following technical scheme that the method for preparing the self-decoloring wallpaper base film comprises the following steps: (1) Adding a color development substance into 8-14wt% sodium hydroxide solution, heating to 40-45 ℃, and stirring for 1-1.2h to obtain a color development solution, wherein the color development substance is one of 1-naphtholphthalein, thymolphthalein and alpha-naphtholphthalein; (2) The preparation of the hydrophobic material comprises the steps of mixing fluorine modified acrylic resin, an emulsifying agent, a dispersing agent, a leveling agent, a defoaming agent and water, shearing and emulsifying at the speed of 5800-6000r/min to obtain fluorine modified acrylic resin emulsion, dropwise adding a developing solution while stirring, and uniformly mixing to obtain the hydrophobic material; (3) The preparation of the hydrophilic material comprises the steps of mixing water-based acrylic resin, an emulsifying agent, a dispersing agent, a leveling agent, a defoaming agent and water, shearing and emulsifying at the speed of 4600-5200r/min, and adding a pH regulator to adjust the pH to 8-10 to prepare the hydrophilic material; (4) And brushing, namely coating the hydrophobic material on the wall surface in a spraying, rolling or brushing mode, forming a hydrophobic layer with the thickness of 50-300 mu m after fully drying under the ventilation condition, coating the hydrophilic material on the hydrophobic layer in a spraying, rolling or brushing mode, forming a hydrophilic layer with the thickness of 100-300 mu m after fully drying under the ventilation condition, coating the hydrophobic material on the hydrophilic layer in a spraying, rolling or brushing mode, and forming the hydrophobic layer with the thickness of 50-300 mu m after fully drying under the ventilation condition. Through adopting above-mentioned technical scheme, the chromogenic solution is red under alkaline environment, react with the air under ventilation environment, the pH drops gradually and becomes colorless state, the hydrophobic material has red when brushing, make constructor can clearly and definitely see brushing area and not brush the area, avoid appearing brushing the condition of missing, treat the hydrophobic material after drying, brush hydrophilic material, alkaline hydrophilic material and chromogenic substance contact, thereby make the hydrophobic layer discolour once more, do benefit to and brush completely, the hydrophilic material is dry under ventilation condition after the pH decline, after the color development fades, brush hydrophobic material, hydrophobic material has red, be favorable to brushing and have not lacked the hourglass, form hydrophobic-hydrophilic-hydrophobic layer structure after hydrophobic material and hydrophilic material simultaneously, can effectively improve the intensity after brushing, can also improve the mould proof performance of wall paper base film after brushing, reduce the wall paper and appear mould the condition of wetting, the life of wall paper has been prolonged. Preferably, the hydrophilic material and the hydrophobic material further comprise humidity response fibers, the addition amount