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Self-stratifying polymer cement photocatalytic coating and preparation method and application thereof

A cement and coating technology, applied in the field of self-layered photocatalytic coatings, can solve the problems of low surface layer ratio, difficulty in taking into account interfacial adhesion, weather resistance, water resistance and mechanical properties, uneven dispersion, etc.

Active Publication Date: 2020-04-28
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The inventor's further research has found that some existing self-layering photocatalytic coatings still have at least the following deficiencies: (1) Nano TiO 2 Uneven dispersion, surface TiO 2 Disadvantages such as low proportion seriously affect the photocatalytic performance of the coating; (2) The matrix components of the existing photocatalytic coatings are difficult to take into account high interface adhesion, weather resistance, water resistance and mechanical properties

Method used

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  • Self-stratifying polymer cement photocatalytic coating and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0085] A self-layering polymer cement photocatalytic coating and a preparation method thereof, comprising the steps of:

[0086] 1. Nano-TiO 2 Preparation of bamboo charcoal composite material:

[0087](1) Bamboo charcoal pretreatment: Take bamboo charcoal in a beaker, add distilled water, heat to boil, filter and dry at 100°C until constant weight. Take 10 parts of dried bamboo charcoal, add 50 parts of absolute ethanol, and ultrasonically disperse for 0.5 h to obtain activated carbon alcohol solution. Dilute the silane coupling agent with 30 parts of distilled water and 5 parts of absolute ethanol, stir at 100rmp for 2h to obtain the hydrolyzate of the silane coupling agent; add the bamboo charcoal alcohol solution and the hydrolyzate of the silane coupling agent to the flask, and use 0.5mol / L) and ammonia solution (pH=8) to adjust the pH value to be neutral, magnetically stir at 70°C for 2h, suction filter and dry at 120°C for 2h, cool, and pass through a 200-mesh standar...

Embodiment 2

[0094] A self-layering polymer cement photocatalytic coating and a preparation method thereof, comprising the steps of:

[0095] 1. Nano-TiO 2 Preparation of bamboo charcoal composite material:

[0096] (1) Bamboo charcoal pretreatment: Take bamboo charcoal in a beaker, add distilled water, heat to boil, filter and dry at 120°C until constant weight. Take 30 parts of dried bamboo charcoal, add 55 parts of absolute ethanol, and ultrasonically disperse for 1.0 h to obtain activated carbon alcohol solution. Dilute the silane coupling agent with 40 parts of distilled water and 10 parts of absolute ethanol, stir at 500rmp for 1h to obtain the hydrolyzate of the silane coupling agent; 1.0mol / L) and ammonia solution (pH = 9) to adjust the pH value to neutral, magnetically stirred at 50°C for 2.5h, suction filtered and dried at 110°C for 2h, cooled, and passed through a 200-mesh standard after grinding Sieve to obtain modified bamboo charcoal powder;

[0097] (2) 2 parts of P25 na...

Embodiment 3

[0103] A self-layering polymer cement photocatalytic coating and a preparation method thereof, comprising the steps of:

[0104] 1. Nano-TiO 2 Preparation of bamboo charcoal composite material:

[0105] (1) Bamboo charcoal pretreatment: Take bamboo charcoal in a beaker, add distilled water, heat to boil, filter and dry at 110°C until constant weight. Take 30 parts of dried bamboo charcoal, add 60 parts of absolute ethanol, and ultrasonically disperse for 1.2 hours to obtain activated carbon alcohol solution. Dilute the silane coupling agent with 35 parts of distilled water and 8 parts of absolute ethanol, stir at 400rmp for 1h to obtain the hydrolyzate of the silane coupling agent; add the bamboo charcoal alcohol solution and the hydrolyzate of the silane coupling agent to the flask, and use 1.0mol / L) and ammonia solution (pH = 8) to adjust the pH value to neutral, magnetically stirred at 60°C for 2.5h, filtered with suction and dried at 100°C for 2h, cooled, and passed thro...

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Abstract

The invention belongs to the technical field of self-stratifying photocatalytic coatings, and particularly relates to a self-stratifying polymer cement photocatalytic coating and a preparation methodand application thereof. The photocatalytic coating is prepared from the following raw materials in parts by weight: 25-30 parts of polyacrylate emulsion, 20-25 parts of carbon adsorption nano TiO2 modified fluoroacrylic emulsion and 15-20 parts of cement. The coating has a gradient self-stratifying function in a film forming process, the polyacrylate emulsion moves towards the base layer, the adhesive force with the building surface is increased, the fluorocarbon emulsion component modified by adsorbing the nano TiO2 by the bamboo charcoal moves towards the surface layer and the utilization rate of nano TiO2 is increased, so that the photocatalytic function of limited nano TiO2 in the coating is exerted to the greatest extent, the function of the photocatalytic coating with higher nano TiO2 content is achieved under the condition of lower doping amount of nano TiO2 and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of self-layering photocatalytic coatings, in particular to a self-layering polymer cement photocatalytic coating and its preparation method and application. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Photocatalytic technology is an energy-saving, green and environmentally friendly new technology that converts solar energy into chemical energy by using the oxidation-reduction reaction generated by ultraviolet irradiation. It has extremely broad application prospects in energy and the environment. Among many photocatalytic materials, nano-TiO 2 With the advantages of high catalytic effic...

Claims

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Application Information

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IPC IPC(8): C09D133/08C09D133/12C09D133/02C09D7/62C09D7/61
CPCC09D133/08C09D133/16C09D133/02C09D7/62C09D7/61C08L2205/02C08L2312/00C08K2201/011C08K2003/2241C08K2201/014C08L33/16C08K13/06C08K9/12C08K9/06C08K3/22C08K3/04C08K3/34C08K3/00C08L33/08
Inventor 侯鹏坤赵丕琪付兴华梁辰刘明乐芦令超程新
Owner UNIV OF JINAN
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