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CN-122013949-A - Antibacterial heat-generating building decorative wall cloth containing graphene and preparation method thereof

CN122013949ACN 122013949 ACN122013949 ACN 122013949ACN-122013949-A

Abstract

The invention relates to the technical field of wall cloth, in particular to an antibacterial heat-generating building decorative wall cloth containing graphene and a preparation method thereof, wherein the antibacterial heat-generating building decorative wall cloth comprises, by weight, 5-12 parts of modified graphene, 30-50 parts of aqueous polyurethane emulsion, 3-8 parts of an antibacterial auxiliary agent, 1-3 parts of a dispersing agent, 2-5 parts of a film forming agent, 1-4 parts of a toughening agent and 20-40 parts of deionized water, and the modified graphene is prepared by modifying the modified graphene with a modifying liquid and ball milling the modified graphene with ball milling. According to the invention, the synergistic effect of the modified liquid and the ball abrasive not only improves the dispersibility of graphene, but also synergistically enhances the antibacterial and heat generating properties of the graphene, so that the wall cloth has the functions of efficient antibacterial and rapid heat generation.

Inventors

  • Chen Geling

Assignees

  • 深圳市立衡新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260409

Claims (8)

  1. 1. The antibacterial heat-generating building decorative wall cloth is characterized by comprising, by weight, 5-12 parts of modified graphene, 30-50 parts of aqueous polyurethane emulsion, 3-8 parts of antibacterial auxiliary agents, 1-3 parts of dispersing agents, 2-5 parts of film forming agents, 1-4 parts of toughening agents and 20-40 parts of deionized water, wherein the raw materials of the antibacterial heat-generating functional layer comprise, by weight, 5-12 parts of modified graphene, 2-5 parts of film forming agents, 1-4 parts of toughening agents and 20-40 parts of deionized water, and the modified graphene is prepared by modification of a modifying liquid and ball milling treatment.
  2. 2. The graphene-containing antibacterial heat-generating building decorative wall cloth according to claim 1, wherein the preparation method of the modified graphene comprises the following steps: s1, preparing a modified liquid, namely uniformly mixing 2-5 parts of carbon nanofiber, 1-4 parts of aluminum borate whisker and 5-8 parts of 5% lanthanum chloride solution by mass fraction to obtain a mixed liquor, fully mixing 3-5 parts of nano attapulgite, 2-5 parts of nanocellulose and 5-8 parts of silane solution to obtain a blending agent, and uniformly stirring the blending agent and the mixed liquor according to the weight ratio of 2 (3-5) to obtain the modified liquid; S2, graphene modification treatment, namely stirring and modifying graphene in a modifying liquid which is 3-5 times of the total amount of graphene, wherein the stirring rotation speed is 450-500r/min, stirring is completed for 1h, modified graphene liquid is obtained, ball milling materials which are 15-20% of the total amount of modified graphene liquid are added into the modified graphene liquid, ball milling is performed, the ball milling rotation speed is 1000-1500r/min, ball milling is completed, and suction filtration and drying are performed, so that modified graphene is obtained.
  3. 3. The graphene-containing antibacterial heat-generating building decorative wall cloth according to claim 1, wherein the antibacterial auxiliary agent is formed by compounding nano zinc oxide and nano silver particles according to the weight ratio of (3-5) 1, and the particle size is 50-100nm.
  4. 4. The graphene-containing antibacterial heat-generating building decorative wall cloth is characterized in that the dispersing agent is a polycarboxylate dispersing agent, the film forming agent is polyvinyl alcohol, the toughening agent is dibutyl phthalate, the base cloth layer is a flax fiber and polyester fiber blended cloth, the blending weight ratio is (2-3) 1, the surface protective layer is a water-based polyvinyl fluoride coating, and the thickness is 5-10 mu m.
  5. 5. The graphene-containing antibacterial heat-generating building decorative wall cloth according to claim 2, wherein the silane liquid is prepared from a silane coupling agent KH560 and an ethanol water solution according to a weight ratio of 2 (7-9).
  6. 6. The graphene-containing antibacterial heat-generating building decorative wall cloth according to claim 2 is characterized in that the ball abrasive is prepared by uniformly blending 3-5 parts of silicon carbide, 2-4 parts of a chitosan solution with the mass fraction of 5%, 5-8 parts of nano titanium dioxide and 2-4 parts of a sodium citrate solution with the mass fraction of 3-5%.
  7. 7. A method for preparing the graphene-containing antibacterial heat-generating building decorative wall cloth according to any one of claims 1 to 6, comprising the following steps: step1, preparing modified graphene, namely preparing the modified graphene according to the method of claim 2; step 2, preparing antibacterial thermogenic functional slurry, namely adding aqueous polyurethane emulsion and deionized water into a stirring kettle, stirring for 10-15min at the rotating speed of 200-300r/min, sequentially adding a dispersing agent and modified graphene, heating to 40-50 ℃, adjusting the rotating speed to 600-800r/min, stirring for 30-40min, adding an antibacterial auxiliary agent, a film forming agent and a toughening agent, and continuously stirring for 20-30min to obtain the antibacterial thermogenic functional slurry; Step 3, preprocessing the base cloth, namely putting the base cloth layer into a sodium hydroxide aqueous solution with the mass fraction of 2-3%, soaking for 20-30min at 40-50 ℃, taking out, washing with deionized water to be neutral, and drying until the water content is less than or equal to 5%; Step 4, coating the functional layer, namely coating the antibacterial heat-generating functional slurry on the surface of the pretreated base cloth layer in a scraper coating mode, wherein the coating thickness is 20-30 mu m, putting the base cloth layer in an oven after coating, pre-baking for 15-20min at 80-90 ℃, heating to 120-130 ℃, and curing for 30-40min to obtain a base cloth-functional layer composite; and 5, surface protection treatment, namely diluting the water-based polyvinyl fluoride coating, coating the diluted water-based polyvinyl fluoride coating on the surface of the functional layer in a spraying mode, wherein the spraying thickness is 5-10 mu m, drying the diluted water-based polyvinyl fluoride coating at normal temperature, and drying the dried water-based polyvinyl fluoride coating at 100-110 ℃ for 10-15min to obtain the graphene-containing antibacterial heat-generating building decorative wall cloth.
  8. 8. The method according to claim 7, wherein in the step 2, the viscosity of the antibacterial heat-generating functional slurry is adjusted to 2000-3000 mpa.s, in the step 4, the doctor blade speed of doctor blade coating is 1-2m/min, and in the step 5, the dilution ratio of the aqueous polyvinyl fluoride coating is coating material: deionized water=1 (0.8-1.2).

Description

Antibacterial heat-generating building decorative wall cloth containing graphene and preparation method thereof Technical Field The invention relates to the technical field of wall cloth, in particular to an antibacterial heat-generating building decorative wall cloth containing graphene and a preparation method thereof. Background As an important material for indoor decoration, the building decorative wall cloth not only plays a role in decorating and beautifying the space, but also gradually develops towards the functional direction, such as antibiosis, heat preservation, heat generation and the like. With the improvement of the requirements of people on the health and comfort of living environment, the wall cloth with the functions of resisting bacteria and generating heat is widely paid attention to. Graphene, which is a novel two-dimensional carbon material, has excellent heat and electrical conductivity, mechanical properties and antibacterial properties, and is widely applied to modification of functional materials. However, the original graphene has the problem that the sheets are easy to agglomerate, so that the dispersibility of the original graphene in the composite material is poor, the excellent performance of the original graphene is difficult to fully develop, and the application effect of the original graphene in building decorative wall cloth is limited. In addition, the antibacterial and heat generating properties of single graphene still have room for improvement, and the requirements of high-end interior decoration on the materials for multiple functions and high performance cannot be met. In the prior art, although the graphene is applied to related researches of wall cloth, unmodified graphene is mostly adopted, or the modified graphene is modified only by a simple coupling agent, the modified graphene has limited modification effect, the problems of poor dispersibility and insufficient antibacterial heat generating performance still exist, meanwhile, the design of a targeted modification system is lacking, the good compatibility of the graphene and a wall cloth substrate cannot be realized, the functional layer is easy to fall off, and the service life is short. Therefore, the technical scheme for optimizing the graphene performance through a specific modification process and further improving the antibacterial and heat generating effects and the service life of the wall cloth is developed, and the method has important practical significance and application value. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide the antibacterial heat-generating building decorative wall cloth containing graphene and the preparation method thereof, so as to solve the problems in the background art. The invention solves the technical problems by adopting the following technical scheme: the invention provides an antibacterial heat-generating building decorative wall cloth containing graphene, which comprises a base cloth layer, an antibacterial heat-generating functional layer and a surface protective layer, wherein the raw materials of the antibacterial heat-generating functional layer comprise, by weight, 5-12 parts of modified graphene, 30-50 parts of aqueous polyurethane emulsion, 3-8 parts of antibacterial auxiliary agents, 1-3 parts of dispersing agents, 2-5 parts of film forming agents, 1-4 parts of toughening agents and 20-40 parts of deionized water, and the modified graphene is prepared by modifying the modified graphene through modification of a modifying liquid and ball milling treatment. Further, the preparation method of the modified graphene comprises the following steps: S1, preparing a modified liquid, namely uniformly mixing 2-5 parts of carbon nanofiber, 1-4 parts of aluminum borate whisker and 5-8 parts of 5% lanthanum chloride solution by mass fraction to obtain a mixed liquid, fully mixing 3-5 parts of nano attapulgite, 2-5 parts of nano cellulose and 5-8 parts of silane liquid to obtain a blending agent, uniformly stirring the blending agent and the mixed liquid according to the weight ratio of 2 (3-5) to obtain the modified liquid, wherein the silane liquid is prepared by mixing a silane coupling agent KH560 and an ethanol aqueous solution according to the weight ratio of 2 (7-9); S2, graphene modification treatment, namely stirring and modifying graphene in a modified liquid which is 3-5 times of the total amount of graphene, wherein the stirring rotation speed is 450-500r/min, stirring is completed for 1h, so as to obtain modified graphene liquid, adding ball milling materials which are 15-20% of the total amount of modified graphene liquid into the modified graphene liquid, mixing and ball milling, wherein the ball milling rotation speed is 1000-1500r/min, ball milling is completed for 2h, and suction filtration and drying are performed, so that the modified graphene is obtained, and the ball grinding material is prepared by uniforml