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Method for preparing metal-PDMS (Polydimethylsiloxane) composite material

A composite material and metal technology, which is applied in the field of preparing metal-PDMS composite materials, can solve problems such as the difficulty of introducing biomolecules and limit the application of PDMS, and achieve the effects of low cost, high integration and simple process

Active Publication Date: 2012-08-08
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nevertheless, as a material for microfluidic chips, PDMS still needs to be modified (Electrophoresis, 2003, 24, 3607). For example, the surface of PDMS is inert, which makes it difficult to introduce biomolecules on its surface, such as Enzymes, antibodies, nucleic acids and proteins, which greatly limit the application of PDMS on analysis chips based on immobilization of biomolecules

Method used

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  • Method for preparing metal-PDMS (Polydimethylsiloxane) composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Preparation of platinum-PDMS sheet composite material

[0034] (1) Preparation of PDMS sheet: Inject commercialized PDMS raw materials into a sheet profile mold, and cure for a certain period of time according to the product instructions to obtain the desired sheet. (For example: WACKER company, RT 601 product, raw materials include A and B two components. According to the instructions, the two components A and B are uniformly mixed in a volume ratio of 9:1, then injected into the sheet profile mold, and cured at 70°C for 20 minutes to obtain a PDMS sheet. )

[0035] (2) Prepare a chloroplatinic acid solution with a concentration of 5mmol / L, soak the PDMS sheet in the chloroplatinic acid solution for 60 minutes, and use the silane compound additive in PDMS as a reducing agent to reduce the platinum in the chloroplatinic acid solution Ion, generate nano-platinum particles on the surface of the PDMS sheet, then take out the PDMS sheet and rinse it with deionized ...

Embodiment 2

[0039] Example 2: Preparation of gold-PDMS sheet composite material

[0040] (1) Prepare a PDMS sheet according to the method of Example 1.

[0041] (2) Prepare a chloroauric acid aqueous solution with a concentration of 10mmol / L, soak the PDMS sheet in the chloroauric acid solution for 30 minutes, and use the silane compound additive in PDMS as a reducing agent to reduce the gold in the chloroauric acid solution Ion, generate nano-gold particles on the surface of the PDMS sheet, then take out the PDMS sheet and rinse it with deionized water.

[0042] (3) Prepare amplification solution: take 7.5ml deionized water, add 1mL, 2% (g / 100ml) sodium citrate aqueous solution, 30μL, 50mmol / L chloroauric acid aqueous solution, 10μL, 0.1mol / L ascorbic acid aqueous solution to it .

[0043] (4) Immerse the PDMS sheet with gold nanoparticles on the surface into the amplification solution, and after reacting at room temperature for 10 minutes, take out the PDMS sheet and rinse with deionized water...

Embodiment 3

[0044] Example 3: Preparation of patterned silver-PDMS composite material

[0045] (1) Prepare a PDMS chip with patterned channels.

[0046] (2) Configure a silver nitrate aqueous solution with a concentration of 10 mmol / L, fill the channel of the PDMS chip with the solution through a syringe pump, react for 1 hour, and then use a syringe pump to inject deionized water into the channel to remove the silver nitrate aqueous solution in the channel.

[0047] (3) Prepare amplification solution: take 7.5ml deionized water, add 2ml, 2% (g / 100ml) trisodium citrate aqueous solution, 30μL, 50mmol / L silver nitrate aqueous solution, 10μL, 0.1mol / L ascorbic acid aqueous solution to it .

[0048] (4) Use a syringe pump to inject the amplification solution into the PDMS chip channel to amplify the nano-silver particles formed in the channel. After 30 minutes of reaction, inject deionized water into the channel to rinse the channel, and the channel area contains the silver film layer. The silver-PD...

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Abstract

The invention discloses a method for preparing a metal-PDMS (Polydimethylsiloxane) composite material. The method comprises the following steps of: performing a reduction reaction by taking an additive in a PDMS material as a reducing agent for a metal precursor to generate metal nanoparticle seeds on the entire or a part of the PDMS; performing an amplified reaction on the metal nanoparticle seeds by using an amplification solution which contains a metal precursor, a protecting agent and the like to generate a metal film layer; and preparing the metal-PDMS composite material. According to the method, metal films can be prepared on the surfaces of PDMS sheets, pipes, rods and other special-shaped PDMS materials and in channels of PDMS chips. The method has the characteristics of simple process, no need of performing high-cost metal evaporation and the like; and the prepared metal-PDMS composite material has the advantages of low cost and high integration degree.

Description

Technical field [0001] The invention relates to a method for preparing a metal-PDMS composite material. Background technique [0002] Polydimethylsiloxane (PDMS) is a polymer material that is widely used in the field of microfluidics. It has the advantages of good transparency, high elasticity, oxidation resistance, and easy molding. Nevertheless, as a material for microfluidic chips, PDMS still needs to be modified (Electrophoresis, 2003, 24, 3607). For example, the surface of PDMS is inert, which makes it difficult to introduce biomolecules on its surface, such as Enzymes, antibodies, nucleic acids and proteins have greatly restricted the application of PDMS on analysis chips based on immobilization of biomolecules. To solve this problem and expand the application range of PDMS microfluidic chips, people use chemical layer modification, sol-gel method, and nano or micro particle modification methods to improve PDMS microchannels (Anal.Chem., 2005, 77, 6843) ). [0003] Recentl...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08J7/04C08L83/04C08K3/08B22F9/24B82Y40/00
Inventor 李峻柏鲁闻生
Owner INST OF CHEM CHINESE ACAD OF SCI
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