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Fluorocarbon polymer surface-modified nano titanium dioxide and its preparation method, coating agent, coat, and coat article

A nano-titanium dioxide and fluorocarbon polymer technology, applied in the field of materials, can solve the problem that the coating materials cannot take into account the super-hydrophobicity and self-cleaning, and achieve the effect of excellent anti-fouling, self-cleaning and long-lasting stability.

Inactive Publication Date: 2017-06-09
CHINA LEATHER & FOOTWEAR IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the fact that existing coating materials cannot take into account the functions of superhydrophobic and self-cleaning, the present invention provides a nano-titanium dioxide surface modified with a fluorocarbon polymer and a preparation method thereof, a coating agent, a coating film and a coating film product

Method used

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  • Fluorocarbon polymer surface-modified nano titanium dioxide and its preparation method, coating agent, coat, and coat article
  • Fluorocarbon polymer surface-modified nano titanium dioxide and its preparation method, coating agent, coat, and coat article

Examples

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no. 1 approach

[0043] The invention provides a nano-titanium dioxide surface modified with a fluorocarbon polymer, which is obtained by performing an atom transfer radical polymerization reaction between the nano-titanium dioxide containing an organic functional group and a fluorine-containing monomer in the presence of an initiator and a catalytic system. and

[0044] When 0.01 g of the nano-titanium dioxide whose surface is modified with a fluorocarbon polymer photocatalytically degrades 30 mL of a methyl orange solution with a concentration of 10 mg / L, after 8 hours of visible light irradiation, the degradation rate of the methyl orange is above 0.6 , preferably above 0.7, more preferably above 0.8.

[0045] Atom Transfer Radical Polymerization (ATRP) uses simple organic halides as initiators and transition metal complexes as halogen atom carriers to establish reversible dynamics between active species and dormant species through redox reactions. Equilibrium, so as to realize the control...

no. 2 approach

[0061] The present invention also provides a method for preparing nano-titanium dioxide whose surface is modified with fluorocarbon polymer according to the present invention, comprising the following steps:

[0062] Step 1), utilizing a silane coupling agent to modify the nano-titanium dioxide;

[0063] Step 2), dispersing the modified nano-titanium dioxide in a solvent, then adding the initiator to react, so that the surface of the nano-titanium dioxide has a modification site;

[0064] In step 3), in the presence of a catalyst system and a solvent, the titanium dioxide having the modified site is polymerized with the fluorine-containing monomer to obtain a reaction product system.

[0065] Preferably, the solvent is one or a combination of two or more of tetrahydrofuran, triethylamine, and toluene.

[0066] Generally speaking, toluene can be used as solvent in step 1), and tetrahydrofuran and triethylamine can be used as solvent in step 3). When adding the initiator in st...

no. 3 approach

[0086] The present invention also provides a finishing agent, comprising:

[0087] According to the nano-titanium dioxide whose surface is modified with fluorocarbon polymer in the first embodiment of the present invention, and

[0088] Polymer solution; the polymer in the polymer solution includes: one or a combination of two or more of polyacrylate, polyurethane and polydimethylsiloxane.

[0089] Specifically, the solid content of the polymer solution is between 5% and 50%, preferably between 10% and 30%. In addition, in the polymer solution, the mass fraction range of the nano-titanium dioxide whose surface is modified with the fluorocarbon polymer is 0.1%-1.0%.

[0090] Preferably, when 0.02 g of the finishing agent photocatalytically degrades 30 mL of a methyl orange solution with a concentration of 10 mg / L, after 8 hours of visible light irradiation, the degradation rate of the methyl orange is above 0.5, preferably above 0.6 , more preferably above 0.7.

[0091] The ...

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Abstract

The invention provides fluorocarbon polymer surface-modified nano titanium dioxide and its preparation method, a coating agent, coat, and a coat article. The fluorocarbon polymer surface-modified nano titanium dioxide is prepared by subjecting nano titanium dioxide with organic functional groups and a fluorine-bearing monomer to atom transfer radical polymerization in the presence of an initiator and a catalytic system; when 30 mL of methyl orange solution having the concentration of 10 mg / L is photocatalytically degraded with 0.01 g of the fluorocarbon polymer surface-modified nano titanium dioxide, degradation rate of methyl orange reaches 0.6 and above, preferably 0.7 and above, and more preferably 0.8 and above, after 8 hours of exposure to visible light. The fluorocarbon polymer surface-modified nano titanium dioxide has excellent anti-fouling self-cleaning property, antibacterial and mildew-proof properties, and superhydrophobicity; the coating agent, coat and coat particle prepared have lasting stability.

Description

technical field [0001] The invention relates to a nano-titanium dioxide whose surface is modified with a fluorocarbon polymer, a preparation method thereof, a finishing agent, a coating film and a coating film product, and belongs to the field of materials. Background technique [0002] Leather refers to the denatured and non-perishable animal skin obtained through physical and chemical processing such as depilation and tanning. It is mainly composed of denatured collagen, tanning agents and other chemical products. This structure makes it highly hydrophilic, but its own water and oil repellency is poor. Leather clothing or leather shoes are often stained with water or oil when worn by the human body, and may also be stained with a lot of sweat, sebum and other human secretions. These dirt just become a good environment for microorganisms to multiply, causing skin The product is moldy and spoiled. Also, leather items are exposed to water, which can harden and deform them i...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/22C09D5/16C09D5/14C09D133/04C09D175/04C09D183/04
CPCC08F292/00C09D5/14C09D5/1637C09D5/1662C09D5/1668C09D133/04C09D175/04C08F220/22C08L51/10
Inventor 熊祖江王旭梁纪宇贾继章
Owner CHINA LEATHER & FOOTWEAR IND RES INST
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