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Method for constructing super-hydrophobic wear-resistant leather coating layer based on amphipathic hollow silicon dioxide Janus particles

A silicon dioxide, amphiphilic technology, applied in the direction of silicon dioxide, silicon oxide, coating, etc., can solve the problem that the coating has not achieved super-hydrophobic effect, the wear resistance and hydrophobic durability of the coating have not been solved, etc. problem, to achieve the effect of regular morphology and controllable structure

Active Publication Date: 2019-01-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the coating obtained by this method has not achieved the superhydrophobic effect, and the wear resistance and hydrophobic durability of the coating have not been resolved.

Method used

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  • Method for constructing super-hydrophobic wear-resistant leather coating layer based on amphipathic hollow silicon dioxide Janus particles
  • Method for constructing super-hydrophobic wear-resistant leather coating layer based on amphipathic hollow silicon dioxide Janus particles
  • Method for constructing super-hydrophobic wear-resistant leather coating layer based on amphipathic hollow silicon dioxide Janus particles

Examples

Experimental program
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preparation example Construction

[0030] The preparation method of the present invention comprises the following steps:

[0031] (1) Amphiphilic hollow SiO 2 Preparation of Janus particles

[0032]Weigh 0.50-2.00g of azobisisobutylamidine hydrochloride, 100-300g of deionized water and 0.25-0.50g of hexadecyltrimethylammonium bromide, dissolve and stir evenly, then transfer to a three-necked flask. Then, 3.00-5.00 g of styrene was added under stirring, and argon gas was introduced for 1 h, and then the temperature was raised to 60-80° C. for 10-24 h, and the polystyrene (PS) emulsion was obtained. Measure 15-35mL of PS emulsion, 10-40mL of deionized water and 40-160mL of isopropanol, stir well, transfer to a three-necked flask, and adjust the pH to 8-11 with ammonia water. Then, add 0.5-5.0g of tetraethyl orthosilicate dropwise into the three-necked flask, raise the temperature to 30-85°C after the dropwise addition, keep the temperature for 3-8h, wash by centrifugation three times, and dry in an oven to obta...

Embodiment 1

[0040] (1) Hollow SiO 2 Particle preparation

[0041] Weigh 0.50 g of azobisisobutylamidine hydrochloride, 100 g of deionized water, and 0.25 g of cetyltrimethylammonium bromide, dissolve and stir evenly, and transfer them to a three-necked flask. Then, 3.00 g of styrene was added under stirring, and argon gas was introduced for 1 h, and then the temperature was raised to 60° C., and the reaction was kept for 10 h to obtain a polystyrene (PS) emulsion. Measure 15mL of PS emulsion, 10mL of deionized water and 40mL of isopropanol, stir evenly, transfer to a three-necked flask, and adjust the pH to 8 with ammonia water. Then, 0.5 g of tetraethyl orthosilicate was added dropwise to the three-necked flask, and after the dropwise addition, the temperature was raised to 30°C, kept for 3 hours, centrifuged and washed three times, and dried in an oven to obtain PS@SiO 2 particle. Finally, calcined in a muffle furnace at 500 °C for 3 h to prepare hollow SiO with a particle size of 30...

Embodiment 2

[0049] (1) Hollow SiO 2 Particle preparation

[0050] Weigh 2.00g of azobisisobutylamidine hydrochloride, 300g of deionized water and 0.50g of cetyltrimethylammonium bromide, dissolve and stir evenly, and then transfer to a three-necked flask. Then, 5.00 g of styrene was added under stirring, and argon was introduced for 1 h, and then the temperature was raised to 80° C., and the reaction was kept for 24 h to obtain a polystyrene (PS) emulsion. Measure 35mL of PS emulsion, 40mL of deionized water and 160mL of isopropanol, stir evenly, transfer to a three-necked flask, and adjust the pH to 11 with ammonia water. Then, 5.0 g of tetraethyl orthosilicate was added dropwise to the three-necked flask, and after the dropwise addition, the temperature was raised to 85°C, kept for 8 hours, centrifuged and washed three times, and dried in an oven to obtain PS@SiO 2 particle. Finally, calcined in a muffle furnace at 500 °C for 6 h to prepare hollow SiO with a particle size of 500 nm ...

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Abstract

The invention relates to a method for constructing a super-hydrophobic wear-resistant leather coating layer based on amphipathic hollow silicon dioxide Janus particles. The method comprises the stepsof preparing reactive amphipathic hollow silicon dioxide Janus particles through the combination of a Pickering emulsion method and a click chemistry method, and generating chemical crosslinking between hydrophilic ends with reaction activity in the amphipathic hollow silicon dioxide Janus particles and a base material by virtue of a layer-layer coating method to enable hydrophobic ends to extendto the surface of a coating layer, so as to obtain the super-hydrophobic wear-resistant leather coating layer. A result shows that the water contact angle of the constructed super-hydrophobic wear-resistant leather coating layer is over 170 degrees, and the hydrophobic durability and wear resistance of the constructed super-hydrophobic wear-resistant leather coating layer are both relatively good.After a water drop is remained on the surface of the coating layer for 30 minutes, the contact angle is still over 150 degrees; and when the coating layer is seriously worn after a leather sample isrubbed for 300 times, the coating layer still has a super-hydrophobic effect.

Description

technical field [0001] The invention belongs to the technical field of leather coatings, and in particular relates to a method for constructing superhydrophobic wear-resistant leather coatings based on amphiphilic hollow silica Janus particles. Background technique [0002] In recent years, inspired by nature, superhydrophobic materials have attracted widespread attention due to their special surface wettability. This special wettability not only endows the solid surface with excellent water resistance, but also makes it of great application value in the fields of self-cleaning, metal anticorrosion, anti-icing, oil-water separation, and drag reduction in pipeline transportation. There are various methods for preparing superhydrophobic surfaces, such as etching, deposition, anodic oxidation, template method, electrospinning, high temperature thermal oxidation, etc., but due to the reaction conditions (strong acid-base and high temperature, etc.) The preparation of superhydro...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D1/00C14C11/00C01B33/18
CPCC01B33/18C01P2004/04C01P2004/34C01P2004/62C01P2004/64C09D1/00C09D175/04C14C11/00C14C11/006
Inventor 鲍艳张元霞郭耀飞马建中张文博刘超
Owner SHAANXI UNIV OF SCI & TECH
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