Search

CN-122011874-A - Nanometer titanium dioxide modified polyacrylate anti-ultraviolet coating and preparation method thereof

CN122011874ACN 122011874 ACN122011874 ACN 122011874ACN-122011874-A

Abstract

The present disclosure provides a nano titanium dioxide modified polyacrylate ultraviolet resistant coating and a preparation method thereof, which belongs to the technical field of functional coating materials. The preparation method comprises the steps of adding anatase type nano TiO 2 into a mixed solution of absolute ethyl alcohol and deionized water, adding KH570 after ultrasonic dispersion treatment, stirring for reaction, washing, centrifugally separating and drying to form K-TiO 2 powder, dissolving an emulsifying agent and NaHCO 3 into deionized water, stirring, adding an oil phase mixed solution formed by methyl methacrylate, butyl acrylate and acrylic acid mixed monomers and the K-TiO 2 powder, carrying out ultrasonic treatment, heating and stirring, adding an initiator for reaction to obtain a composite coating emulsion, and curing and forming the composite coating emulsion to form the ultraviolet-resistant coating. The surface of TiO 2 is changed from hydrophilicity to lipophilicity through KH-570 modification, stable chemical combination is formed by Ti-O-Si bond and polyacrylate matrix, and interface compatibility is obviously improved.

Inventors

  • YANG YAN
  • TIAN XIAOXUAN
  • LOU ZHENGJI
  • SUN HAONAN
  • ZHANG XINGYU
  • XU BOWEI
  • DU CHUNZHONG
  • LI WEI
  • ZENG RONGJUN
  • SUN QI
  • CHEN SHENGGUANG
  • XIANG SHIYU
  • LUO CHENG
  • Zhu Binsha

Assignees

  • 华能西藏雅鲁藏布江水电开发投资有限公司
  • 西安热工研究院有限公司

Dates

Publication Date
20260512
Application Date
20260129

Claims (10)

  1. 1. The preparation method of the nano titanium dioxide modified polyacrylate ultraviolet resistant coating is characterized by comprising the following steps of: S110, adding anatase type nano TiO 2 into a mixed solution of absolute ethyl alcohol and deionized water, performing ultrasonic dispersion treatment, adding KH570, stirring for reaction, washing, centrifugally separating, and drying to form K-TiO 2 powder; s120, dissolving an emulsifier and NaHCO 3 in deionized water, stirring, adding an oil phase mixed solution formed by methyl methacrylate, butyl acrylate, an acrylic acid mixed monomer and the K-TiO 2 powder, carrying out ultrasonic treatment, heating and stirring, and adding an initiator for reaction to obtain a composite coating emulsion; S130, curing and forming the composite coating emulsion to form the ultraviolet-resistant coating.
  2. 2. The preparation method according to claim 1, wherein the addition amount of KH570 is 2-10% of the mass of nano-TiO 2 .
  3. 3. The preparation method according to claim 1, wherein in step S110, the volume ratio of the anatase nano TiO 2 content to absolute ethanol, deionized water is 5g (50-60) mL (90-96) mL; Adding the anatase type nano TiO 2 into the mixed solution of absolute ethyl alcohol and deionized water, and performing ultrasonic dispersion for 25-35min at 55-65 ℃ and 1000 rpm; Adding KH570 into anatase nano TiO 2 solution, reacting at 55-65 ℃ and 1000rpm for 1.5-2.5h, and drying at 55-65 ℃ for 10-15h.
  4. 4. The method of claim 1, wherein the K-TiO 2 powder is added in an amount of 3-11% of the mixed monomer content.
  5. 5. The method of claim 1, wherein the emulsifier comprises nonylphenol polyoxyethylene ether and sodium dodecyl sulfate.
  6. 6. The method according to claim 5, wherein the ratio of the polyoxyethylene nonylphenol ether to the sodium dodecyl sulfate is 1:1.6.
  7. 7. The method according to claim 1, wherein in step S120, the content ratio of the emulsifier to the NaHCO 3 is 1.2:0.01; the addition amount of the emulsifier is 3-4% of the content of the mixed monomer.
  8. 8. The preparation method according to claim 1, wherein the content ratio of methyl methacrylate, butyl acrylate and acrylic acid is 5:5:0.1.
  9. 9. The method of claim 1, wherein the initiator is K 2 S 2 O 8 and the initiator is added in an amount of 1-2% of the mixed monomer content.
  10. 10. A nano titanium dioxide modified polyacrylate anti-ultraviolet coating, which is characterized in that the nano titanium dioxide modified polyacrylate anti-ultraviolet coating is prepared by the preparation method of any one of claims 1 to 9.

Description

Nanometer titanium dioxide modified polyacrylate anti-ultraviolet coating and preparation method thereof Technical Field The present disclosure belongs to the technical field of functional coating materials, and in particular relates to a nano titanium dioxide modified polyacrylate anti-ultraviolet coating and a preparation method thereof. Background With the increased ozone depletion, excessive ultraviolet radiation poses a serious threat to human health and material performance. The development of functional coatings with excellent uv protection properties is a current research hotspot. The nano TiO 2 is widely applied to the field of ultraviolet resistant materials due to good ultraviolet absorption performance, low cost and biocompatibility. However, nano TiO 2 has high surface energy, is easy to agglomerate, has poor compatibility with an organic matrix (such as polyacrylate), and leads to the performance reduction of the composite coating. The polyacrylate emulsion has the advantages of environmental protection, good film forming property and the like, but the ultraviolet resistance of the pure polyacrylate is limited, and the polyacrylate emulsion needs to be compounded with inorganic nano materials to improve the performance. In the prior art, a coupling agent is often adopted to carry out surface modification on the nano TiO 2 so as to improve the dispersibility and the compatibility of the nano TiO 2, but the dosage of the coupling agent is difficult to accurately control, so that the modification effect is unstable. In addition, the preparation method of the composite emulsion has obvious influence on the stability of the coating, and the traditional emulsion polymerization method is easy to have the problems of overhigh gel rate, poor storage stability and the like. Therefore, the development of the preparation method capable of precisely controlling the modification conditions and improving the stability and the ultraviolet resistance of the composite coating has important significance. Disclosure of Invention The disclosure aims to at least solve one of the technical problems in the prior art and provides a nano titanium dioxide modified polyacrylate anti-ultraviolet coating and a preparation method thereof. In one aspect of the disclosure, a method for preparing a nano titanium dioxide modified polyacrylate anti-ultraviolet coating is provided, the method comprising: S110, adding anatase type nano TiO 2 into a mixed solution of absolute ethyl alcohol and deionized water, performing ultrasonic dispersion treatment, adding KH570, stirring for reaction, washing, centrifugally separating, and drying to form K-TiO 2 powder; s120, dissolving an emulsifier and NaHCO 3 in deionized water, stirring, adding an oil phase mixed solution formed by methyl methacrylate, butyl acrylate, an acrylic acid mixed monomer and the K-TiO 2 powder, carrying out ultrasonic treatment, heating and stirring, and adding an initiator for reaction to obtain a composite coating emulsion; S130, curing and forming the composite coating emulsion to form the ultraviolet-resistant coating. Optionally, the adding amount of KH570 is 2-10% of the mass of nano-TiO 2. Optionally, in step S110, the volume ratio of the content of anatase nano TiO 2 to the volume ratio of absolute ethanol to deionized water is 5g:50-60ml:90-96mL; Adding the anatase type nano TiO 2 into the mixed solution of absolute ethyl alcohol and deionized water, and performing ultrasonic dispersion for 25-35min at 55-65 ℃ and 1000 rpm; Adding KH570 into anatase nano TiO 2 solution, reacting at 55-65 ℃ and 1000rpm for 1.5-2.5h, and drying at 55-65 ℃ for 10-15h. Alternatively, the K-TiO 2 powder is added in an amount of 3-11% of the mixed monomer content. Optionally, the emulsifier comprises polyoxyethylene nonylphenol ether and sodium dodecyl sulfate. Optionally, the ratio of the polyoxyethylene nonylphenol ether to the sodium dodecyl sulfate is 1:1.6. Optionally, in step S120, the content ratio of the emulsifier to the NaHCO 3 is 1.2:0.01; the addition amount of the emulsifier is 3-4% of the content of the mixed monomer. Optionally, the content ratio of the methyl methacrylate, the butyl acrylate and the acrylic acid is 5:5:0.1. Optionally, the initiator is KPS, and the addition amount of the initiator is 1-2% of the content of the mixed monomers. In another aspect of the disclosure, a nano-titania modified polyacrylate anti-ultraviolet coating is provided, and the nano-titania modified polyacrylate anti-ultraviolet coating is prepared by the preparation method described above. The present disclosure provides a nano titanium dioxide modified polyacrylate anti-ultraviolet coating and a preparation method thereof. The preparation method comprises the steps of S110, adding anatase type nano TiO 2 into a mixed solution of absolute ethyl alcohol and deionized water, adding KH570 after ultrasonic dispersion treatment, stirring for reaction, washing, centrifugally separati