Preparation method of photothermal self-lubricating oil gel for liquid drop remote accurate driving

A lubricating oil and photothermal technology is applied in the preparation field of photothermal self-lubricating oil gel, which can solve the problems of easy pollution of materials and high cost, and achieve the effects of low experimental condition requirements, low production cost and short preparation period.

Active Publication Date: 2017-02-22
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally used for droplets in an open system, the surface of the driven material cannot realize remote and precise driving of droplets with different surface tensions, and there are also problems such as high cost and easy contamination of materials. Therefore, the present invention provides a solution for realizing droplet driving. better material

Method used

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  • Preparation method of photothermal self-lubricating oil gel for liquid drop remote accurate driving
  • Preparation method of photothermal self-lubricating oil gel for liquid drop remote accurate driving
  • Preparation method of photothermal self-lubricating oil gel for liquid drop remote accurate driving

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation of nano-graphite sheet / polydimethylsiloxane composite photothermal self-lubricating oil gel surface, the specific steps are as follows:

[0049] The first step, the configuration of the nanographite / polydimethylsiloxane mixture:

[0050]First place the nano-graphite sheet in a vacuum drying oven at 80°C for 12 hours in a vacuum, then mix 0.579 g of nano-graphite sheet with polydimethylsiloxane (PDMS) prepolymer and its curing agent silane coupling agent in mass ratio of Mix at a ratio of 0.579:10:1, and stir mechanically at a high speed of 2200 rpm for 5 minutes to obtain a nano-graphite flake / polydimethylsiloxane mixed liquid.

[0051] In the second step, the nanographite / polydimethylsiloxane mixture is solidified:

[0052] Pour the nano-graphite flake / polydimethylsiloxane mixed solution fully mixed in the first step into the mold, and place it in a vacuum drying oven at room temperature for degassing for 30 minutes; The dimethylsiloxane mixture was c...

Embodiment 2

[0062] The preparation of the nano-ferric oxide / polydimethylsiloxane composite photothermal self-lubricating oil gel surface, the specific steps are as follows:

[0063] The first step, the configuration of nano-ferric oxide / polydimethylsiloxane mixture:

[0064] First lyophilize the oleic acid-modified nanometer iron ferric oxide alcohol dispersion for 24 hours to obtain a freeze-dried powder, then add 0.579 grams of nanometer iron ferric oxide and polydimethylsiloxane (PDMS) prepolymer and its curing agent to Mix at a mass ratio of 0.579:10:1, and stir mechanically at a high speed of 3000 rpm for 10 minutes to obtain a nano-ferric oxide / polydimethylsiloxane mixed liquid.

[0065] In the second step, the nano-ferric oxide / polydimethylsiloxane mixture is solidified:

[0066] Pour the nano-ferric oxide / polydimethylsiloxane mixed solution thoroughly mixed in the first step into a mold, and place it in a vacuum drying oven at room temperature for 1 hour for defoaming. Then, the...

Embodiment 3

[0071] The preparation of graphene / polydimethylsiloxane composite photothermal self-lubricating oil gel surface, the specific steps are:

[0072] The first step, graphene / polydimethylsiloxane mixed liquid configuration:

[0073] First place the graphene in a vacuum drying oven at 80°C for 12 hours in vacuum, then mix 0.579 grams of graphene with polydimethylsiloxane (PDMS) prepolymer and its curing agent in a mass ratio of 0.579:10:1 Proportional mixing, 2200rpm high-speed mechanical stirring for 5min, prepared graphene / polydimethylsiloxane mixed solution and solidified.

[0074] In the second step, the graphene / polydimethylsiloxane mixture is solidified:

[0075] Pour the fully mixed graphene / polydimethylsiloxane mixture into a mold, and place it in a vacuum drying oven at room temperature for vacuum defoaming for 1 hour. Then, the defoamed graphene / polydimethylsiloxane mixed solution was placed in an oven at 70° C. for 8 hours to cure.

[0076] In the third step, the cure...

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Abstract

The invention discloses a preparation method of photothermal self-lubricating oil gel for liquid drop remote accurate driving, and belongs to the field of interfacial physical chemistry. Nano-particles are mixed with polydimethylsiloxane and curing agents and heated and cured to obtain nano-particle and polydimethylsiloxane composite materials, and the composite materials are soaked in lubricating liquid and swell to obtain the photothermal self-lubricating oil gel. Both contact angle hysteresis and the slide angle of the surface of the prepared photothermal self-lubricating oil gel for liquid drops with different surface tension are smaller than 5 degrees, rapid response to near infrared laser can be realized, large local temperature gradient fields are formed in surfaces of the materials, and further driving of the liquid drops on the surfaces of the materials can be remotely and accurately controlled. By adjusting the irradiation point position and the direction of the near infrared laser, the liquid drops can move along set complicated tracks or climb up on inclined surfaces by overcoming gravity.

Description

technical field [0001] The invention belongs to the technical field of interface physics and chemistry, and specifically refers to a method for preparing a photothermal self-lubricating oil gel for remote precise driving of liquid droplets. Background technique [0002] The driving of droplets in traditional open systems mostly requires the construction of fine micro-nanostructures (or electrode arrays) and large wettability gradients on the surface of materials to overcome their obstacles. Droplets with low surface tension tend to fail more easily in the process of overcoming their obstruction. High preparation costs and surface contamination of chemically modified materials greatly limit the applications of these materials. Furthermore, long-distance precise actuation has always been a great challenge in this field. The photothermal self-lubricating oil gel surface effectively solves the disadvantages of the material surface that can be used for droplet actuation under t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/02C08L83/04C08K7/00C08K3/04C08K3/22
CPCC08J7/02C08J2383/04C08K3/04C08K3/22C08K7/00C08K2003/2275C08K2201/011C08L83/04
Inventor 郑咏梅高春雷
Owner BEIHANG UNIV
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