Titania fluorocarbon nano-coating and preparation thereof

A technology of nano-titanium dioxide and fluorocarbon coatings, which is applied in the field of coatings and its preparation in the field of nanotechnology, can solve the problems of large silane coupling dose and the use of silane coupling agents not reaching the maximum level, and achieve low production costs and benefit Large-scale production and cost-saving effect

Inactive Publication Date: 2009-05-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this modification method is a liquid phase method, which uses a relatively large amount of silane coupling, and 1g of coupling agent can only treat 10g of TiO 2 , the utilization of silane coupling agent has not reached the maximum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The rutile nano titanium dioxide particles were synthesized by sol-gel method and modified by silane coupling agent KH-570. Among them, the modified nano titanium dioxide method:

[0036] Composition (by weight percentage)

[0037] Silane coupling agent KH-570 1%

[0038] Nano Titanium Dioxide 80%

[0039] Water1%

[0040] Isopropanol or Methanol Balance

[0041] Specific operation method: Mix isopropanol and water evenly, then add dropwise KH-570 silane coupling agent equal to water, stir for 2 hours, and mix evenly. Add 80% rutile-type nano-titanium dioxide particles, put them in an oven at 80°C for drying, and put them in an oven at 120°C for drying when they are not fully dried, and grind them into fine particles in a mortar to obtain silane-coupled Rutile nano-titanium dioxide modified on the surface of the coupling agent.

[0042] Coating Formulation:

[0043] KH-570 modified nano titanium dioxide particles 2% (particle size 30nm)

[0044] Fluorocarbon bas...

Embodiment 2

[0051] The difference from Example 1 lies in the modified nano-titanium dioxide and the coating ratio.

[0052] Among them, the method of modifying nano-titanium dioxide with silane coupling agent KH-570:

[0053] Composition (by weight percentage)

[0054] Silane coupling agent KH-570 2%

[0055] Nano Titanium Dioxide 90%

[0056] water 2%

[0057] Isopropanol or Methanol Balance

[0058] Specific operation method: Mix isopropanol and water evenly, then add dropwise KH-570 silane coupling agent equal to water, stir for 2 hours, and mix evenly. Add 90% rutile nano-titanium dioxide particles, dry them in an oven at 80°C, and dry them completely in an oven at 120°C when they are not fully dried, and grind them into fine particles in a mortar to obtain silane-coupled Rutile nano-titanium dioxide particles modified on the surface of the coupling agent.

[0059] Coating Formulation:

[0060] Nano titanium dioxide particles modified by KH-570 6% (particle size 30nm)

[0061]...

Embodiment 3

[0068] The difference from Examples 1 and 2 lies in the modified nano-titanium dioxide particles and the coating ratio.

[0069] Among them, the method of modifying nano-titanium dioxide with silane coupling agent KH-570:

[0070] Composition (by weight percentage)

[0071] Silane coupling agent KH-570 1.5%

[0072] Nano Titanium Dioxide 85%

[0073] Water 1.5%

[0074] Isopropanol or Methanol Balance

[0075] Specific operation method: Mix isopropanol and water evenly, then add dropwise KH-570 silane coupling agent equal to water, stir for 2 hours, and mix evenly. Add 85% rutile-type nano-titanium dioxide particles, put them in an oven at 80°C for drying, and put them in an oven at 120°C for drying when they are not fully dried, and grind them into fine particles in a mortar to obtain silane Rutile nano-titanium dioxide surface-modified by a coupling agent.

[0076] Coating Formulation:

[0077] KH-570 modified nano-titanium dioxide particles 4% (particle size 30nm)

...

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Abstract

The invention relates to a nano titanium dioxide fluorine-carbon coating in the technical field of nono, and a preparation method thereof. The coating comprises the following compositions by weight percentage: 2 to 6 percent of nano titanium dioxide, 80 to 90 percent of fluorine-carbon base material, 5 to 10 percent of curing agent and 2 to 10 percent of coating thinner. The preparation method comprises the following steps: 1, according to weight percentage, 2 to 6 percent of nano titanium dioxide particle is weighed and added into the 2 to 10 percent of coating thinner so as to be evenly mixed through ultrasonic dispersion; and 2, the mixture is added with the 80 to 90 percent of fluorine-carbon base material and the 5 to 10 percent of curing agent orderly and is evenly stirred to be made into coating mother solution. In addition, the nano titanium dioxide is rutile-type nano titanium dioxide particle modified by silane coupling agent KH-570. The nano titanium dioxide fluorine-carbon coating can effectively improve the dispersing performance of nano particle in the coating and the UV aging resistance of the coating.

Description

technical field [0001] The invention relates to a coating in the field of nanotechnology and a preparation method thereof, in particular to a nano-titanium dioxide fluorocarbon coating and a preparation method thereof. Background technique [0002] Ultraviolet rays in the atmosphere are the most important factor leading to the aging of coating films. Ultraviolet light is an electromagnetic wave with a shorter wavelength than visible light, and its wavelength is between 200 and 400nm. According to the length of wavelength, ultraviolet rays can be divided into short-wave UVC (200-280nm), medium-wave UVB (280-320nm), and long-wave UVA (320-400nm). Under normal circumstances, it is medium-wave ultraviolet rays that cause aging of materials, because short-wave ultraviolet rays generally cannot reach the earth's surface, but with the continuous destruction of the earth's ozone layer, short-wave ultraviolet rays can also radiate the earth's surface, and the ultraviolet index conti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D5/32
Inventor 李娜贺蓉刘朴崔大祥
Owner SHANGHAI JIAO TONG UNIV
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