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Shear thickening fluid, coating, preparation methods of shear thickening fluid and coating and application of coating

A technology of thickening liquid and powder, which is applied in the field of protection and coating. It can solve the problems of self-agglomeration, the reduction of energy absorption effect of shear thickening liquid, and the influence of coating protection effect, etc., and achieve the increase of hydrogen bond interaction, Shear thickening is easy and the effect of reducing self-agglomeration phenomenon

Pending Publication Date: 2021-06-08
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively small particle size of the nanoparticles in the nano-dispersed phase, the nanoparticles will also self-agglomerate when they are not subjected to external forces, resulting in a decrease in the energy absorption effect of the shear thickening liquid, thereby affecting the coating. protective effect of

Method used

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  • Shear thickening fluid, coating, preparation methods of shear thickening fluid and coating and application of coating
  • Shear thickening fluid, coating, preparation methods of shear thickening fluid and coating and application of coating
  • Shear thickening fluid, coating, preparation methods of shear thickening fluid and coating and application of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] In Example 1, the oxide nanopowder is Nano-SiO 2 , the aminosiloxane coupling agent is γ-aminopropyltriethoxysilane, and the specific model is KH-550.

[0104] Concrete preparation steps are as follows:

[0105] In the first step, 2.5gNano-SiO 2 Under ultrasonic conditions (80Hz, 30min), disperse evenly in 62.5ml of H 2 O+CH 3 CH 2 OH mixed solution (water=15.625ml in this example; ethanol=46.875ml), the Nano-SiO after hydrolysis 2 ,

[0106] In the second step, weigh 0.625g of KH-550 and the hydrolyzed Nano-SiO 2 Mixing is carried out, and after mixing evenly, acetic acid is slowly added dropwise to adjust the pH value of the solution to be between 4 and 5, and then stirred in a constant temperature water bath at 75°C for 4 hours to obtain a mixture containing precipitates. During the stirring process in a constant temperature water bath, the mixture was condensed and refluxed at 80°C under a nitrogen atmosphere.

[0107] The 3rd step, the mixture that obtains ...

Embodiment 2

[0112] In Example 2, the halogenated alcohol is ethyl bromide, and the imidazole reagent is 1-vinylimidazole.

[0113] The preparation method is as follows:

[0114] Measure the 1-vinylimidazole of 0.94g and the ethyl acetate of 15ml respectively, join in the three-necked flask of 100ml, after mixing uniformly, add the bromoethane of 2.18g again, then the material in the three-necked flask is mixed uniformly, obtain mixture. Specifically, the process of mixing the materials in the three-necked flask was magnetically stirred in an oil bath at 85°C under a nitrogen atmosphere, and condensed and refluxed for 18 hours to obtain a liquid crude product.

[0115] After the reaction was completed, the liquid crude product was cooled at room temperature, and the solution was separated into layers, wherein the upper layer was an ethyl acetate layer, and the lower layer of light yellow viscous layer was a quaternary ammonium salt.

[0116] Extract the pale yellow viscous layer of the low...

Embodiment 3

[0119] In Example 3, the halogenated alcohol is bromoethanol, and the imidazole reagent is 1-vinylimidazole.

[0120] Mix 6.248g of bromoethanol and 15ml of acetonitrile as a solvent (15ml of acetonitrile is evenly divided into two parts, and mix with bromoethanol twice) and pour it into a three-necked flask, then magnetically stir the oil bath at 80°C for 30min to make the bromine Mix ethanol and acetonitrile evenly.

[0121] The 1-vinylimidazole of 4.703g is dissolved in 15ml acetonitrile, after dissolving is finished, in the three-necked flask, drip with constant pressure funnel, and pass into N 2 Magnetic stirring in an oil bath at 80°C, reflux for 24 hours. After the reaction is completed, pour the obtained liquid into a single-necked flask dedicated to rotary evaporation and perform rotary evaporation for 20 minutes under the parameters of temperature of 50°C, pressure of -0.08MPa, and rotation speed of 10r / min to obtain a liquid crude product, crude product It is slig...

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Abstract

The invention discloses a shear thickening fluid, a coating, preparation methods of the shear thickening fluid and the coating and application of the coating. The shear thickening fluid comprises modified nano oxide powder and quaternary ammonium salt. The quaternary ammonium salt is obtained by carrying out quaternization reaction on an imidazole reagent and halogenated alcohol or halogenated alkane. The modified nano oxide powder is obtained by carrying out coupling grafting reaction on nano oxide powder and an amino siloxane coupling agent. According to the shear thickening liquid provided by the embodiment of the invention, due to the synergistic effect of the modified nano oxide particles and the quaternary ammonium salt, the shear thickening of the modified nano oxide powder / liquid quaternary ammonium salt at room temperature is easier to occur, and the shear thickening is more remarkable.

Description

technical field [0001] The invention relates to the field of protection and the field of coatings, in particular to a shear thickening liquid, a coating, a preparation method thereof, and an application of the coating. Background technique [0002] In order to reduce and prevent the damage to the target caused by the detonation products produced by the explosion, and improve the anti-knock performance of the material, it is usually to increase the thickness of the protective medium, adopt a composite structure, and develop new materials. Among them, increasing the thickness of the medium will affect Mobility has an impact on survivability, and the complexity of composite structures also limits the application of some technologies. Therefore, introducing new materials to improve the impact resistance and explosion-proof performance of the medium has become an effective means. [0003] At present, the new materials introduced in the field of protection mainly include alloy ...

Claims

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Application Information

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IPC IPC(8): C09D7/62C09D7/63C09D175/08
CPCC09D7/62C09D7/63C09D175/08C08K2201/011C08K2003/2241C08K2003/2296C08K2003/2227C08K9/06C08K3/36C08K5/3445C08K3/22
Inventor 亓锋向泽辉亓峰胡帆欧阳晓平齐福刚赵镍曹红帅
Owner XIANGTAN UNIV
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