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Preparation method of water-based super-hydrophobic material

A super-hydrophobic and water-based technology, applied in the field of preparation of water-based super-hydrophobic materials, can solve the problems such as difficulty in properly blending adhesives and nanoparticles, poor durability, environmental pollution, etc., achieving good industrial development and application prospects, increasing wear resistance performance, easy to prepare and operate

Inactive Publication Date: 2018-10-12
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing a water-based super-hydrophobic material in view of the disadvantages of poor durability, difficulty in properly blending adhesives and nanoparticles, and polluting the environment in the current technology.

Method used

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  • Preparation method of water-based super-hydrophobic material
  • Preparation method of water-based super-hydrophobic material
  • Preparation method of water-based super-hydrophobic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of material with 52.3% grafting

[0037] (1) Modification of silica (particle size 10-100nm)

[0038] Take 2g of silicon dioxide and disperse it in 200ml of ethanol, ultrasonically disperse for 30min, then add 10ml of double distilled water, 2ml of ammonia water (mass fraction 25-28%) and 6g of γ-methacryloxypropyltrimethoxy Silane, the stirring speed is controlled at 300r / min, the reaction is stopped after 48 hours at room temperature, the product is washed with ethanol several times, and after vacuum drying, the surface-modified silica is obtained.

[0039] attached figure 2 It was obtained by scanning silicon dioxide with a FEI Nano SEM 450 electron scanning electron microscope, image 3 It is the electron micrograph of modified silicon dioxide. From attached figure 2 with 3 It can be seen that there is no significant change in the morphology of the silica before and after modification, and there is a hydrophobic silane coupling agent on the modifi...

Embodiment 2

[0044] Preparation of material with 60.4% grafting

[0045] (1) Silica modification is the same as the first step of the implementation case (1)

[0046] (2) Emulsion polymerization for surface grafting reaction of modified silica

[0047] Disperse dry 1g of modified silicon dioxide in 100ml of double distilled water, ultrasonically disperse for 30min, then add 0.24g of sodium bicarbonate (NaHCO 3 ), 0.13g sodium dodecylsulfonate (SDS), ultrasonically dispersed for 30min, added to the reactor, heated to 80°C in an oil bath, fed with argon, mechanically stirred at a stirring speed of 250r / min, and then returned to the reaction system Add 4g of dodecafluoroheptyl methacrylate to the solution, and make the emulsion for 30min. Dissolve 0.08g of potassium persulfate in 10ml of water. After the dissolution is complete, add it dropwise to the reaction system. After 1h, the reaction is carried out at a constant temperature of 80°C for 18h, and the obtained emulsion Stand still to ob...

Embodiment 3

[0049] Preparation of material with 65.9% grafting

[0050] (1) Silica modification is the same as the first step of the implementation case (1)

[0051] (2) Emulsion polymerization for surface grafting reaction of modified silica

[0052] Disperse the dried 1g of modified silica in 100ml of double distilled water, add 0.24g of sodium bicarbonate (NaHCO 3 ), 0.20g of sodium dodecylbenzenesulfonate (SDS), ultrasonically dispersed for 30min, added to the reactor, heated to 80°C in an oil bath, fed with argon, stirred mechanically, and then added 6g of methyl Dodecafluoroheptyl acrylate, emulsion 30min, dissolve 0.12g potassium persulfate in 10mL water, drop it into the previous reactor after dissolving completely, drop it in 1h, stir at 250r / min, react at a constant temperature of 80°C for 20h, put Gained emulsion is left standstill, and the water-based superhydrophobic material that obtains grafting amount is 65.9%; This material is added in water, is mixed with the dispersio...

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Abstract

The invention discloses a preparation method of a water-based super-hydrophobic material. The method comprises the steps that 1, a silane coupling agent is used for modifying the surface of silicon dioxide, and the silicon dioxide with double bonds on the surface is obtained; 2, an emulsion polymerization method is adopted for grafting hydrophobic polymer long chains to the surface, and the water-based super-hydrophobic material is prepared. When the polymer is under the glass-transition temperature or above, chains of the polymer begin to move, the chains can be twisted, micro-balls of materials are combined more tightly, and therefore the nano-particles are not likely to be disengaged, the abrasion resistance of the material is enhanced, and the defects caused by adopting an adhesive areavoided. By adopting the emulsion polymerization method, no organic solvent is adopted, environment contaminations are small, the cost is low, and the preparation process is simple.

Description

technical field [0001] The technical solution of the present invention relates to the field of organic, inorganic and polymer materials, in particular to a method for preparing a water-based superhydrophobic material. Background technique [0002] As early as the 20th century, people discovered that the micron-scale rough structure on the surface of lotus leaf is the key to its hydrophobicity and self-cleaning function. In 2002, Jiang Lei's research group [L. Jiang, et al. Adv. Mater., 2002, 14, 1857.] found that nanostructures also existed on the papillae with microstructures on the surface of lotus leaves, and thought that microstructures and nanostructures were similar. The combined hierarchical structure is the root cause of the strong hydrophobicity of the surface. The report published by the research group in Nature in 2004 revealed the secret that water striders can fly on water [L. Jiang, et al. Nature, 2004, 432, 36.]. When the contact angle of the surface of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/24C08F2/26C09D151/10C09D5/16D06M15/277D06M11/79
CPCC08F2/26C08F292/00C09D5/1637C09D5/1662C09D151/10D06M11/79D06M15/277D06M2200/12C08F220/24
Inventor 张旭赵月华王小梅
Owner HEBEI UNIV OF TECH
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