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Nano SiO2 composite polysiloxane modified water-based terpenyl EP/PU (Epoxy Resin/Polyurethane) superhydrophobic self-cleaning polymer and preparation method thereof

A polysiloxane and superhydrophobic technology, which is applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor water resistance and pollution resistance of film-forming materials, and achieve good hydrophobicity , excellent superhydrophobic, small particle size effect

Inactive Publication Date: 2016-11-16
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the existing water-based coatings have shortcomings such as poor water resistance and pollution resistance of the film-forming material, which are limited in practical application.

Method used

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  • Nano SiO2 composite polysiloxane modified water-based terpenyl EP/PU (Epoxy Resin/Polyurethane) superhydrophobic self-cleaning polymer and preparation method thereof
  • Nano SiO2 composite polysiloxane modified water-based terpenyl EP/PU (Epoxy Resin/Polyurethane) superhydrophobic self-cleaning polymer and preparation method thereof
  • Nano SiO2 composite polysiloxane modified water-based terpenyl EP/PU (Epoxy Resin/Polyurethane) superhydrophobic self-cleaning polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] use nano-SiO 2 and hydrophobic nano-SiO 2 .

[0033] Add a certain proportion of ethanol, ammonia water and distilled water into a 250mL round bottom flask, stir and heat to 60°C, quickly add the mixed solution of TEOS and ethanol into the reaction flask, and react at 60°C for 1h to obtain nano-SiO 2 ; Add the mixture of trimethylethoxysilane and ethanol dropwise into the reaction flask, stir at 60°C for 2 hours at high speed, and obtain SiO by high-speed centrifugation 2 , repeatedly centrifuged and washed with absolute ethanol until the solution was neutral, and dried to obtain hydrophobic nano-SiO 2 powder. Hydrophobic nano-SiO 2 The average particle size is 100nm (such as figure 2 ).

Embodiment 2

[0035] Hydrophobic nano-SiO 2 The addition amount is 5% of the solid resin mass in the polysiloxane-modified waterborne terpene-based EP / PU composite system.

[0036] 0.37g hydrophobic nano-SiO 2 Add to the composite system of 10.00g polysiloxane-modified terpene-based epoxy resin polyol aqueous dispersion (solid content 35%) and 4.86g hydrophilic modified isocyanate, stir and ultrasonic treatment 5min, mix well, add 4. Dilute with 50g of distilled water, spray to form a film, place at room temperature for 24 hours, and then bake in an oven at 120°C for 5 hours. After standing at room temperature for 24 hours, the surface static water contact angle of the coating measured by a contact angle measuring instrument according to the national standard GB / T 30447-2013 is 104°.

Embodiment 3

[0038] Hydrophobic nano-SiO 2 The addition amount is 10% of the solid resin mass in the polysiloxane-modified waterborne terpene-based EP / PU composite system.

[0039] 0.59g hydrophobic nano-SiO 2 Add to the composite system of 8.00g polysiloxane-modified terpene-based epoxy resin polyol aqueous dispersion (solid content 35%) and 3.87g hydrophilic modified isocyanate, ultrasonic 8min, mix well, add 5.81g distilled water Diluted, sprayed to form a film, placed at room temperature for 24 hours, and then baked in an oven at 120°C for 5 hours. After standing at room temperature for 24 hours, the surface static water contact angle of the coating measured by a contact angle measuring instrument according to the national standard GB / T30447-2013 is 132°.

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Abstract

The invention discloses a nano SiO2 composite polysiloxane modified water-based terpenyl EP / PU (Epoxy Resin / Polyurethane) superhydrophobic self-cleaning polymer and a preparation method thereof. The preparation method comprises the following steps of modifying nano SiO2 into hydrophobic nano SiO2 by using trimethylethoxysilane, and then adding the modified hydrophobic nano SiO2 into a compounded system of polysiloxane modified terpenyl epoxy resin polyol aqueous dispersion and polyisocyanate under the assistance of stirring and ultrasonic waves, crosslinking and curing to obtain the nano SiO2 composite polysiloxane modified water-based terpenyl EP / PU superhydrophobic self-cleaning polymer. The surface static water contact angle of a polymer coating is greater than 150 degrees and a rolling angle of the polymer coating is smaller than 10 degrees. The preparation method disclosed by the invention is simple and convenient; a superhydrophobic coating of which the surface has a micro-nanostructure can be obtained by a spraying process; the nano SiO2 composite polysiloxane modified water-based terpenyl EP / PU superhydrophobic self-cleaning polymer is good in hydrophobicity and lasting in hydrophobic effect, and can be applied to the fields of surface self-cleaning coatings and the like.

Description

technical field [0001] The invention relates to a superhydrophobic self-cleaning polymer and a preparation method thereof, in particular to a nano-SiO 2 A preparation method of composite polysiloxane-modified waterborne terpene-based EP / PU superhydrophobic self-cleaning polymer. Background technique [0002] With the continuous aggravation of environmental pollution, more and more serious smog, oily smog, exhaust gas, etc. have brought serious erosion to building exterior walls and outdoor facilities, affecting their aesthetics, functionality and durability. Poor stain resistance of coatings is a common shortcoming of traditional coatings, which restricts its application to a certain extent. According to the self-cleaning principle of the "lotus leaf effect", nanoparticles can be used to construct micro-nano surface structures to prepare composite modified self-cleaning coatings with self-cleaning function. [0003] nano-SiO 2 It is a lightweight nanomaterial with the cha...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12C09D5/16C08G18/79C08G18/58
CPCC08G18/588C08G18/798C08K3/36C08K9/06C08K2201/011C09D5/1662C09D5/1681C09D175/04
Inventor 吴国民刘迪孔振武
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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