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Method for physical and chemical combined modification of surface of polydimethylsiloxane

A technology of polydimethylsiloxane and dimethylsiloxane, which is applied in the field of physical and chemical joint modification of the surface of polydimethylsiloxane, can solve problems such as poor durability, and achieve growth and increase affinity. Water-based, good biocompatibility effect

Inactive Publication Date: 2011-06-15
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although plasma irradiation is very simple, its durability is poor, and the surface hydrophobicity of PDMS will recover shortly after irradiation. In order to solve this problem, functional groups such as –OH, -COOH, -NH2 are all It has been successfully introduced and grafted on PDMS for surface modification

Method used

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  • Method for physical and chemical combined modification of surface of polydimethylsiloxane
  • Method for physical and chemical combined modification of surface of polydimethylsiloxane
  • Method for physical and chemical combined modification of surface of polydimethylsiloxane

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specific Embodiment

[0045] 2. Put the above-mentioned aluminum sheet in a temperature-programmed furnace and burn it at high temperature for 3 hours to eliminate internal stress;

[0046] 3. Put the above-mentioned aluminum sheet in a sulfuric acid, phosphoric acid, and nitric acid solution with a volume ratio of 2:2:1, keep it at 40°C for 20 minutes, remove the grease on the aluminum surface, and clean it with deionized water;

[0047] 4. Then perform electrochemical polishing in sulfuric acid, phosphoric acid, and aqueous solution with a volume ratio of 2:2:1 for 15 minutes, with a voltage of 15V and a temperature of 25°C. With a carbon rod as a reference electrode, take it out and wash it with deionized water ;

[0048] 5. Carry out primary oxidation of the above-mentioned aluminum sheet in 0.6mol / L sulfuric acid for 2 hours, the voltage of the primary oxidation is 25V, keep the temperature below 15°C by water bath method, and take out the aluminum sheet;

[0049] 6. The primary oxidized alum...

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Abstract

The invention relates to a method for pouring polydimethylsiloxane (PDMS) on an anodic aluminum oxide template and modifying the PDMS substrate with a nano structure with polyvinyl alcohol, which is a physical process and chemical process combined surface modification method. The method comprises: preparing anodic aluminum oxide membrane by an aluminum sheet electrolyzing process, pouring PDMS onto the anodic aluminum oxide template, solidifying and stripping the membrane to obtain the surface nano structure of the high polymer; and activating the surface of the high polymer by plasma irradiation, soaking to realize the modification by the polyvinyl alcohol and thus introducing a hydrophilic group. The method combines physical modification and chemical modification and designs a method capable of improving the surface hydrophily of PDMS and maintaining the surface hydrophily of PDMS for a long time. Compared with non-modified PDMS, the modified PDMS has higher biological compatibility and is more favorable for the growth of cells.

Description

technical field [0001] The invention relates to a method of casting polydimethylsiloxane on an anodized aluminum template and modifying polyvinyl alcohol on the polydimethylsiloxane substrate with nanostructures, which is a combination of physical and chemical methods combined surface modification methods. Background technique [0002] Polydimethylsiloxane (PDMS) has good plasticity, non-toxicity and light transmittance, and is widely used in microfluidic research and biochemistry, but the hydrophobicity of PDMS itself hinders its application in many fields. At present, there are two main methods for surface modification of PDMS: physical modification and chemical modification. [0003] Chemical modification mainly includes plasma irradiation and the introduction of functional groups into grafted polymers. Although plasma irradiation is very simple, it has poor durability, and the surface hydrophobicity of PDMS will recover shortly after irradiation. In order to solve this...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08L83/04C25D11/04B29C39/14B82Y40/00
Inventor 王敏李珏瑜
Owner ZHEJIANG UNIV
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