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Ethyl cellulose composite membrane, preparation method and application thereof

A technology of ethyl cellulose and composite membrane, applied in chemical instruments and methods, membrane, membrane technology, etc., can solve the problems of peculiar smell, poor film-forming property, production of toxic substances, etc., and achieve good chemical stability and good hydrophobicity. Effect

Inactive Publication Date: 2020-10-27
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some film-forming materials still have some shortcomings, such as odor, production of toxic substances, poor film-forming properties, etc.

Method used

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  • Ethyl cellulose composite membrane, preparation method and application thereof
  • Ethyl cellulose composite membrane, preparation method and application thereof
  • Ethyl cellulose composite membrane, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 2g of EC powder, add it to 10mL of ethanol solution, stir magnetically at 60°C for 6h, then evenly coat the stirred solution on a glass plate with a spatula, and soak the coated EC membrane in hydrochloric acid solution. The same group of samples were soaked in hydrochloric acid solution for 24 hours, and then soaked in deionized water for 24 hours to remove residual hydrochloric acid ions. After cleaning, the membrane was placed in the middle of a membrane cell equipped with a pair of Pt electrodes, and the impedance spectrum of the EC membrane was measured with an EIS device.

[0032] EIS equivalent circuit diagram:

[0033] Such as Figure 5 Shown is the EC membrane without adding porogen (RS means solution resistance, REC means EC membrane resistance, CPEEC means EC membrane capacitance).

[0034] Such as Figure 6 Shown is the EC composite membrane with porogen added (RX represents the resistance of the porogen, and CPEX represents the capacitance of the po...

Embodiment 2

[0038] Use dimethyl sulfoxide (DMSO) to perform intercalation reaction on Na-MMT powder to obtain exfoliated MMT powder. Take 2 g of EC powder and add MMT powder (concentration 2%) to 10 mL of ethanol solution, and stir magnetically at 60 ° C. 6h, then the stirred solution was uniformly coated on a glass plate with a spatula, and then the coated EC composite membrane was soaked in hydrochloric acid solution. The same group of samples were soaked in hydrochloric acid solution for 24 hours, and then soaked in deionized water for 24 hours to remove residual hydrochloric acid ions. After cleaning, the membrane was placed in the middle of a membrane cell equipped with a pair of Pt electrodes, and the impedance spectrum of the EC composite membrane was measured with an EIS device.

[0039] Such as image 3 As shown, compared with the EC composite film without adding MMT powder, the impedance value of the EC composite film mixed with MMT powder stabilized at a higher value. The res...

Embodiment 3

[0041] Use dimethyl sulfoxide (DMSO) to perform intercalation reaction on Na-MMT powder to obtain exfoliated MMT powder. Take 2g of EC powder and add MMT powder (concentration 5%) to 10mL ethanol solution, and stir magnetically at 60°C 6h, then the stirred solution was uniformly coated on a glass plate with a spatula, and then the coated EC composite membrane was soaked in hydrochloric acid solution. The same group of samples were soaked in hydrochloric acid solution for 24 hours, and then soaked in deionized water for 24 hours to remove residual hydrochloric acid ions. After cleaning, the membrane was placed in the middle of a membrane cell equipped with a pair of Pt electrodes, and the impedance spectrum of the EC composite membrane was measured with an EIS device.

[0042] Such as Figure 4 As shown, compared with the EC composite film without adding MMT powder, the impedance value of the EC composite film mixed with MMT powder stabilized at a higher value. The results sh...

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Abstract

The invention belongs to the technical field of high polymer membranes, and particularly relates to an ethyl cellulose composite membrane, a preparation method and application thereof. The method comprises the following steps of: 1) adding ethyl cellulose powder and pore-foaming agent powder into an organic solvent, and carrying out stirring reaction to obtain a mixed solution; 2) coating a glassplate with the mixed solution obtained in the step 1) to prepare a membrane so as to obtain a glass plate-loaded membrane; 3) soaking the glass plate-loaded membrane obtained in the step 2) in a hydrochloric acid solution, and separating the glass plate from the membrane in the soaking process to obtain a membrane; 4) taking out the membrane soaked in the step 3), and soaking the membrane in deionized water to obtain the ethyl cellulose membrane. According to the preparation method, the hindering effect of the ethyl cellulose membrane on external ions is adjusted by controlling the variety andcontent of the pore-foaming agent, and the application limitation of the ethyl cellulose membrane in the aspect of liquid band-aids is overcome.

Description

technical field [0001] The invention belongs to the technical field of polymer membranes, and in particular relates to an ethyl cellulose composite membrane and its preparation method and application. Background technique [0002] Liquid Band-Aid is made of film-forming material dissolved in a solvent, which can form a protective film on the skin wound by spraying and coating. Compared with traditional adhesive band-aids, liquid band-aids have the advantages of beauty, convenience, air permeability and water resistance. Commonly used film-forming materials include cyanoacrylates, chitosan, nitrocellulose, polyvinylidene fluoride, and polyvinyl alcohol. However, some film-forming materials still have some shortcomings, such as odor, production of toxic substances, and poor film-forming properties. Ethyl cellulose (EC) has the advantages of no odor, no toxicity, good hydrophobicity and easy solubility in organic solvents, and is widely used in the field of pharmaceutical pre...

Claims

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Application Information

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IPC IPC(8): B01D71/10B01D69/12B01D69/02B01D67/00A61L26/00
CPCA61L26/0004A61L26/0023B01D67/0002B01D69/02B01D69/12B01D71/10B01D2325/38C08L1/28
Inventor 陈喆罗舒婷姚蕾林志东付萍
Owner WUHAN INSTITUTE OF TECHNOLOGY
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