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Preparation method of polydimethylsiloxane porous thin film

A technology of polydimethylsiloxane and dimethylsiloxane, which is applied in the field of preparation of polydimethylsiloxane porous films, can solve the problems of limited materials, long preparation process time, soft mechanical strength, etc. Achieve good biocompatibility, improve the application range, and overcome the effect of long process

Inactive Publication Date: 2017-03-22
苏州锐材半导体有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogel fixed-point exposure method refers to curing the hydrogel polymer through fixed-point exposure to form a module of a specific shape, which is then used for cell culture. However, the disadvantage of this method is that the materials used for the scaffold are limited, and the water The biocompatibility and degradability of gel-like polymers are poor compared with protein-based materials
The mold method refers to the use of a mold of a specific shape to obtain a module of a corresponding shape by casting a mold, but the defect of this method is that the material often used in the cell module has a soft mechanical strength, and it is difficult to release it completely after being solidified in the mold
[0006] Therefore, in order to solve the above technical problems, it is necessary to improve the existing design and design a preparation method of polydimethylsiloxane porous film, which can overcome the brittleness, short service life and The shortcomings of long preparation process time, etc., can overcome the defects of long process and high cost in the metal mold prepared by UV-LIGA process

Method used

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  • Preparation method of polydimethylsiloxane porous thin film

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specific Embodiment 1

[0022] Specific embodiment one, a kind of preparation method of polydimethylsiloxane porous film its steps are:

[0023] (1) Preparation of polydimethylsiloxane filler, adding curing agent and diluent to polydimethylsiloxane and stirring evenly to prepare polydimethylsiloxane filler, in which dimethyl The weight ratio of siloxane, curing agent and diluent is 1:1:1;

[0024] (2) Take the micro-flow hole mold 1, the bottom of the micro-flow hole mold groove 2 of the micro-flow hole mold 1 is provided with a plurality of through-hole columns 3, and the polydimethylsiloxane prepared in step (1) An alkane filler is added to the micro-flow hole mold groove 2 of the micro-flow hole mold 1, so that the polydimethylsiloxane filler is evenly distributed around the through-hole column 3;

[0025] (3) Next, the entire micro-fluid hole mold 1 was placed in an environment with a temperature of 50° C. for 4 hours to cure, and then cooled naturally at room temperature to prepare a polydimeth...

specific Embodiment 2

[0031] Specific embodiment two, a kind of preparation method of polydimethylsiloxane porous film its steps are:

[0032] (1) Preparation of polydimethylsiloxane filler, adding curing agent and diluent to polydimethylsiloxane and stirring evenly to prepare polydimethylsiloxane filler, in which dimethyl The weight ratio of siloxane, curing agent and diluent is 8:1:1;

[0033] (2) Take the micro-flow hole mold 1, the bottom of the micro-flow hole mold groove 2 of the micro-flow hole mold 1 is provided with a plurality of through-hole columns 3, and the polydimethylsiloxane prepared in step (1) An alkane filler is added to the micro-flow hole mold groove 2 of the micro-flow hole mold 1, so that the polydimethylsiloxane filler is evenly distributed around the through-hole column 3;

[0034] (3) Next, place the entire micro-fluid hole mold 1 in an environment with a temperature of 90° C. for 3 hours to solidify, and then cool naturally at room temperature to prepare a polydimethyls...

specific Embodiment 3

[0040] Specific embodiment three, a kind of preparation method of polydimethylsiloxane porous film its steps are:

[0041] (1) Preparation of polydimethylsiloxane filler, adding curing agent and diluent to polydimethylsiloxane and stirring evenly to prepare polydimethylsiloxane filler, in which dimethyl The weight ratio of siloxane, curing agent and diluent is 18:1:1;

[0042] (2) Take the micro-flow hole mold 1, the bottom of the micro-flow hole mold groove 2 of the micro-flow hole mold 1 is provided with a plurality of through-hole columns 3, and the polydimethylsiloxane prepared in step (1) An alkane filler is added to the micro-flow hole mold groove 2 of the micro-flow hole mold 1, so that the polydimethylsiloxane filler is evenly distributed around the through-hole column 3;

[0043] (3) Next, place the entire micro-fluid hole mold 1 in an environment with a temperature of 150° C. to cure for 1.5 hours, and then cool naturally at room temperature, thereby preparing a pol...

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Abstract

The invention relates to the technical field of micro-fluid machining, and in particular relates to a preparation method of a polydimethylsiloxane porous thin film. By adopting the preparation method of the polydimethylsiloxane porous thin film, provided by the invention, disadvantages that a silicon mold is relatively fragile, the service life is not long and the time of a preparation process is relatively long and the like can be overcome, and defects of a metal mold prepared by a UV-LIGA (Ultraviolet-Lithographie, Galvanoformung and Abformung) process that the time of the process is long and the cost is high can also be overcome. A process for preparing the polydimethylsiloxane porous thin film by the method is simple, low in cost and easy to operate; the prepared polydimethylsiloxane porous thin film has high elasticity, gas permeability and hydrophobic property and is particularly suitable for research and application in micro-fluid chips; furthermore, the polydimethylsiloxane porous thin film prepared by the method has a porous structure with a micro / nano scale and has good biocompatibility, and an application range of the polydimethylsiloxane porous thin film can be greatly expanded.

Description

technical field [0001] The invention relates to the technical field of microfluidic processing, in particular to a method for preparing a polydimethylsiloxane porous film. Background technique [0002] Polydimethylsiloxane (polydimethylsiloxane, PDMS) is a kind of polymer organosilicon compound. Due to the material's excellent optical permeability, gas permeability, elasticity, and biocompatibility, it has become the most widely used silicon-based organic polymer material in the fields of industry, medicine, and chemistry, for example, it can be used in biomicroelectromechanical microfluidic systems, lubricants, and more. In recent years, PDMS materials have been widely used in the field of microfluidic chips. [0003] In recent years, with the advancement of microfabrication technology and the development of biochemical analysis and other fields, the research of microfluidic chips has received extensive attention. Conventional technology mainly uses silicon, glass, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08J5/18C08J9/00
Inventor 王云翔
Owner 苏州锐材半导体有限公司
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