Lyophobic super-lubricant interface and preparation method thereof

An interface and lyophobic technology, applied in the field of materials, can solve the problems of cumbersome and complicated methods, complicated preparation methods, high sample size and shape requirements, etc., and achieve broad application prospects, simple preparation methods, and excellent repulsion effects

Active Publication Date: 2016-12-21
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Schellenberger et al. prepared a polymer-based lyophobic super-slip interface, mixed SU-8 2025 photoresist with PMI and coated it on glass, then cured it with UV light, and etched it through corrosion, O 2 It is obtained by plasma etching, low surface energy grafting and injection of perfluorinated synovial fluid, which has good repellency to decanol, peanut oil, hexadecane, etc., but this method is too cumbersome and complicated, and the size and shape of the substrate material , Equipment conditions are relatively strict (Direct observation of drops on slipper lubricant-infused surfaces, Soft Matter, 2015, 11, 7617--7626)
Ying Yang's research group prepared a super-slip interface by electrospray phase separation method, which has good anti-icing performance. After mixing nano-silica, fluorosilane and silicone rubber solution, it was sprayed on the substrate by electrospray equipment , and after curing at high temperature to form a film, inject perfluoropolyether to obtain the required coating. This preparation method is too complicated and requires high sample size and shape, and most of them are for specific substrates such as polymers and silicon wafers. Preparation (Durability of a lubricant-infused Electrospray Silicon Rubber surface as an anti-icing coating, Applied SurfaceScience 346(2015)68–76)
The above-mentioned coatings have not been investigated for hexane solutions with very low surface tension, and further research is needed on the lyophobic superslip interface that can repel low surface tension solutions

Method used

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  • Lyophobic super-lubricant interface and preparation method thereof
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  • Lyophobic super-lubricant interface and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) After grinding and polishing the 7075 aluminum alloy, put it into a dilute nitric acid solution with a concentration of 1.2mol / L, and corrode it for 2 minutes under the assistance of 170W ultrasonic waves;

[0018] (2) Take out the sample obtained in step (1), wash it with alcohol, dry it at room temperature, put it into a hexane solution of 0.03mol / L heptadecafluorodecyltriethoxysilane, and modify it at 40°C for 2h , taken out, washed with hexane and dried at room temperature;

[0019] (3) Inject perfluorotripentylamine into the sample obtained in step (2), and the injection amount is 0.008g / cm 2 , a lyophobic superslippery interface is obtained.

[0020] On the prepared liquid-repellent super-slip interface, the kerosene contact angle is 50° (such as figure 1 shown), the hexane contact angle is 30° (as figure 2 shown), and it can slide smoothly on the prepared super-slippery interface (such as image 3 As shown, kerosene was stained with Oil Red O), it can be...

Embodiment 2

[0022] (1) After grinding and polishing the 7075 aluminum alloy, put it into a dilute nitric acid solution with a concentration of 1.0mol / L, and corrode it for 1min under the assistance of 150W ultrasonic waves;

[0023] (2) Take out the sample obtained in step (1), wash it with alcohol and dry it at room temperature. Put it into a 0.01mol / L hexane solution of heptadecafluorodecyltriethoxysilane, modify it at 30°C for 2 hours, take it out, wash it with hexane, and dry it at room temperature;

[0024] (3) Inject perfluorotripentylamine into the sample obtained in step (2), and the injection amount is 0.005g / cm 2 , a lyophobic superslippery interface is obtained.

[0025] The prepared interface has a kerosene contact angle of 40° and a hexane contact angle of 20°, and can slide smoothly on the interface, indicating that a super-slippery interface with lyophobic effect has been obtained.

Embodiment 3

[0027] (1) After grinding and polishing the 7075 aluminum alloy, put it into a dilute nitric acid solution with a concentration of 1.4mol / L, and corrode it for 3 minutes under the assistance of 200W ultrasonic waves;

[0028] (2) Take out the sample obtained in step (1), wash it with alcohol and dry it at room temperature. Put 0.04mol / L heptadecafluorodecyltriethoxysilane in hexane, modify at 40°C for 1.5h, take it out, wash it with hexane and dry it at room temperature;

[0029] (3) Inject perfluorotripentylamine into the sample obtained in step (2), and the injection amount is 0.01g / cm 2 , a lyophobic superslippery interface is obtained.

[0030] The prepared interface has a kerosene contact angle of 35° and a hexane contact angle of 25°, and can slide smoothly on the interface, indicating that a super-slippery interface with lyophobic effect has been obtained.

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Abstract

The invention discloses a lyophobic super-lubricant interface and a preparation method thereof. The lyophobic super-smooth interface is prepared by the steps of: by taking a 7075 aluminum alloy as a substrate, performing surface corrosion in an ultrasonic treatment state with nitric acid to form micro-nano structures; performing surface grafting with fluoroalkyl silane; and finally injecting a perfluoro lubricant into the micro-nano structures. The lyophobic super-lubricant interface disclosed by the invention is prepared by using a structural metal 7075 aluminum alloy which is widely applied. The prepared lyophobic super-lubricant interface has excellent repulsive interaction to water, oil and hexane with extremely low surface tension, and has a wide application prospect in the field of construction, machine manufacturing, aerospace, navigation and the like.

Description

technical field [0001] The invention relates to a liquid-repellent super-slip interface and a preparation method thereof, belonging to the field of materials. Background technique [0002] Inspired by the super-amphiphobic phenomenon of lotus leaves in nature, the researchers prepared superhydrophobic and oleophobic interfaces that repel both water and oil by combining surface micro-nano structures and low surface energy chemical components. This kind of interface is relatively fixed for oil and water, and does not have a good repelling effect for crude oil with high viscosity and liquids with various complex components in life. By simulating the structure of Nepenthes, a synovial fluid-injected porous interface can be obtained by injecting perfluorinated synovial fluid on the original superphobic interface. The surface of this interface is a wet synovial fluid layer, and the bottom is a micro-nano hierarchical structure, which is a lyophobic superslip interface combining a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/02C23C22/78C23C22/83C23F1/20
CPCC23C22/02C23C22/78C23C22/83C23C2222/20C23F1/20
Inventor 王楠熊党生
Owner NANJING UNIV OF SCI & TECH
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