Method for preparing porous polymer film by bubble template method

A technology of porous polymer and template method, which is applied in chemical instruments and methods, membranes, membrane technology, etc., to achieve the effects of simple and flexible device construction, low price, and simple preparation process

Active Publication Date: 2018-11-30
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there are different technologies, such as electrochemical method, emulsion template method, etc., to prepare porous polymer films, each has advantages and disadvantages. Therefore, new methods for producing porous polymer films with controllable size still need to be continuously explored and highly demanded.

Method used

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  • Method for preparing porous polymer film by bubble template method
  • Method for preparing porous polymer film by bubble template method
  • Method for preparing porous polymer film by bubble template method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 1~3 As shown, first prepare the continuous (external) phase solution of the lower layer, mainly dissolving 2.59 g sodium dodecyl sulfate SDS in 99.86 g deionized water, heating and stirring at low temperature (30°C, 350 rpm) for 2 h to form a uniform solution . Take 1g of the prepared SDS solution and add 4g of pure glycerol, and vortex for 5min to make it evenly mixed. Then this solution was moved into a square transparent glass pool (25mm×25mm×25mm), and a small amount of prepared ethoxylated trimethylolpropane triacrylate (ETPTA) solution containing 1wt% photoinitiator was added to it, And as the polymer solution of the upper layer; at the same time, draw 500 μL of air into the syringe of the syringe pump (to confirm that the device is well sealed), and connect the quartz capillary (50 μm inner diameter, 146 μm outer diameter) to the syringe.

[0040] Insert the prepared 5cm-long quartz capillary vertically into the glass cell containing the continu...

Embodiment 2

[0042] First, prepare the continuous (external) phase solution of the lower layer, mainly dissolving 2.59 g sodium dodecyl sulfate SDS in 99.86 g deionized water, heating and stirring at low temperature (30°C, 350 rpm) for 2 h to form a uniform solution. Take 1 g of the prepared SDS solution and add 4 g of pure glycerol, and vortex for 5 min to make it evenly mixed. Then this solution was moved into a square transparent glass cell (25mm×25mm×25mm), and a small amount of prepared ethoxylated trimethylolpropane triacrylate (ETPTA) solution containing 1 wt% photoinitiator was added to it , and used as the polymer solution of the upper layer; at the same time pump 500 μL nitrogen (N 2 ) into the syringe of the syringe pump (make sure the seal of the device is good), and connect the quartz capillary (50 μm inner diameter, 146 μm outer diameter) to the syringe.

[0043] Insert the prepared 5 cm long quartz capillary vertically into the glass pool containing the continuous phase, an...

Embodiment 3

[0045] First prepare the continuous (external) phase solution of the lower layer, mainly adding 4 g of surfactant PF-decanol to 16 g of fluorocarbon oil FC-40, and shake it on a shaker for 24 h to make it evenly mixed. Then move this solution into a square transparent glass cell (25mm×25mm×25mm), and take a small amount of prepared UV-curable monomer N-N-isopropylacrylamide (NIPAM) containing 5 wt% and 2.5 wt% The aqueous solution of the cross-linking agent N-N-dimethylbisacrylamide (MBA) was added to it as the polymer solution of the upper layer; at the same time, 500 μL of air was drawn into the syringe of the syringe pump (to confirm that the device is well sealed), and Connect a quartz capillary (50 µm inner diameter, 146 µm outer diameter) to the syringe.

[0046] Insert the prepared 5 cm long quartz capillary vertically into the glass pool containing the continuous phase, and adjust the distance between the capillary mouth and the bottom of the glass pool ( d g ), so t...

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Abstract

The invention provides a method for preparing a porous polymer film by a bubble template method. The method utilizes a structure that a bubble generated by a capillary-based microfluidic device is assembled at a two-phase liquid interface as a template, wherein, a lower layer of the interface is liquid having a small viscosity, and an upper layer is a polymer solution, when the bubbles rise to thetwo liquid interfaces, the bubbles can be arranged to form a stable structure, under ultraviolet exposure or heating conditions, the upper layer of the polymer solution is cured, the bubbles are ruptured or overflowed, channels can be formed, and the porous polymer film can be prepared. The method simplifies the step of removing the template by using a solvent in the preparation of the conventional template method, and can avoid the influence of the solvent on the properties of the polymer film. The bubble generated by the method has a controllable size and a high production speed, and teh polymer film with the controlled pore size can be prepared in a short time.

Description

technical field [0001] The invention belongs to the technical field of porous polymer preparation, and more specifically relates to a method for preparing a porous polymer film by a bubble template method. Background technique [0002] Porous polymer membranes are used to filter a variety of fluids or emulsions. Among the traditional methods for preparing porous polymer films, the template method is an important method for preparing three-dimensional porous materials, including hard template method and soft template method. The hard template method usually uses nickel foam, SiO 2 Spheres, polystyrene microspheres, etc. as templates have the advantages of regular shape and controllable structure, but at the expense of templates, they have disadvantages such as complicated preparation process, harsh experimental conditions, expensive price, and time-wasting. Compared with the hard template method, the soft template usually uses emulsion, bubbles, etc. as a template, which has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D69/02B01D67/00
CPCB01D67/0016B01D67/0032B01D69/02B01D71/06B01D2323/24
Inventor 水玲玲梅利平金名亮
Owner SOUTH CHINA NORMAL UNIVERSITY
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