Polyethyleneimine based chloramines type antibacterial cellulose membrane, preparation method and application

A polyethyleneimine-based chloramine-type, polyethyleneimine technology, applied in the field of polymer material preparation, to achieve the effects of environmental protection in the preparation process, mild reaction conditions, and simple process operation

Active Publication Date: 2019-01-18
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent 201410769240.8 uses a chemical oxidation polymerization method to initiate the polymerization of heterocyclic N-halamine antibacterial agent monomers on the surface of nano-bacterial cellulose, and finally obtains a polymer halide

Method used

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  • Polyethyleneimine based chloramines type antibacterial cellulose membrane, preparation method and application
  • Polyethyleneimine based chloramines type antibacterial cellulose membrane, preparation method and application
  • Polyethyleneimine based chloramines type antibacterial cellulose membrane, preparation method and application

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preparation example Construction

[0030] A preparation method of polyethyleneimine chloramine type antibacterial cellulose film, comprising the following steps:

[0031] Step 1: preparing a cellulose solution with a mass concentration of 5wt%;

[0032] Step 2: After defoaming the cellulose solution prepared in step 1, casting a film on the substrate, washing after solidification to obtain a regenerated cellulose gel film;

[0033] Step 3: oxidizing the regenerated cellulose gel film obtained in step 2 with an aqueous solution of sodium periodate to obtain a dialdehyde cellulose gel film with an aldehyde group content of 1 to 3 mmol / g;

[0034] Step 4: immersing the dialdehyde cellulose gel film obtained in step 3 in a polyethyleneimine aqueous solution for grafting reaction to obtain a polyethyleneimine grafted cellulose film;

[0035] Step 5: After chlorinating the polyethyleneimine-grafted cellulose film obtained in step 4, a polyethyleneimine-based chloramine-type antibacterial cellulose film is obtained. ...

Embodiment 1

[0044] Prepare polyethyleneimine-based chloramine-type antibacterial cellulose membranes according to the following steps:

[0045] Step 1: Add 5 g of cellulose to 95 g of TBAH / DMSO solvent, stir and dissolve to obtain a 5 wt % cellulose solution; the TBAH / DMSO solvent is a mixture of 50 wt % TBAH aqueous solution and DMSO in a mass ratio of 1:4 liquid;

[0046] Step 2: After defoaming the cellulose solution prepared in step 1, casting the film on the substrate, placing it in the air to gel, and eluting the solvent with water to obtain a regenerated cellulose gel film (CM);

[0047] Step 3: Put 2 g of the regenerated cellulose gel film obtained in Step 2 into a sodium periodate solution with a concentration of 1 g / L and pH=5, oxidize it at 25°C for 6 hours, and then wash it with water to obtain dialdehyde fibers plain gel membrane (DCM);

[0048] Step 4: Immerse the dialdehyde cellulose gel film obtained in step 3 in the PEI solution with a concentration of 0.05% and pH=10, ca...

Embodiment 2

[0056] Prepare polyethyleneimine-based chloramine-type antibacterial cellulose membranes according to the following steps:

[0057] Step 1: Add 5 g of cellulose to 95 g of TBAH / DMSO solvent, stir and dissolve to obtain a 5 wt % cellulose solution; the TBAH / DMSO solvent is a mixture of 50 wt % TBAH aqueous solution and DMSO in a mass ratio of 1:4 liquid;

[0058] Step 2: after degassing the cellulose solution prepared in step 1, casting a film on the substrate, placing it in the air to gel, and eluting the solvent with water to obtain a regenerated cellulose gel film;

[0059] Step 3: Put 2 g of the regenerated cellulose gel film obtained in Step 2 into a sodium periodate solution with a concentration of 1 g / L and pH=5, oxidize it at 25°C for 6 hours, and then wash it with water to obtain dialdehyde fibers plain gel film;

[0060] Step 4: Immerse the dialdehyde cellulose gel film obtained in step 3 into the PEI solution with a concentration of 1% and pH=9, carry out grafting ...

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Abstract

The invention discloses a polyethyleneimine based chloramines type antibacterial cellulose membrane, a preparation method and application. The preparation method comprises the following steps: step 1,preparing a cellulose solution with the mass concentration being 5wt percent; step 2, performing casting on a base plate to form a regenerated cellulose membrane after the cellulose solution is defoamed, and washing after solidification, so as to obtain a regenerated cellulose gel membrane; step 3, oxidizing the regenerated cellulose gel membrane through a sodium periodate aqueous solution, so asto obtain dialdehyde cellulose gel membrane with the aldehyde group amount being 1 to 3mmol/g; step 4, dipping the dialdehyde cellulose gel membrane into a polyethyleneimine aqueous solution to perform grafting reaction, so as to obtain a polyethyleneimine grafted cellulose membrane; step 5, chloridizing the polyethyleneimine grafted cellulose membrane, so as to obtain the polyethyleneimine basedchloramines type antibacterial cellulose membrane. The preparation method is performed in an aqueous solution, reaction conditions are mild, the technology is simple to operate, and the preparation processes are environmentally friendly; the formed antibacterial cellulose membrane has good biocompatibility and breathability, and the antibacterial and bactericidal properties are excellent.

Description

technical field [0001] The invention relates to the field of polymer material preparation, in particular to a polyethyleneimine chloramine type antibacterial cellulose film, a preparation method and application. Background technique [0002] In recent years, a variety of bacterial diseases caused by microorganisms have brought great harm and panic to human beings; therefore, antibacterial agents with high efficiency and broad spectrum are urgently needed to be developed and applied; among many antibacterial agents, N-halamine antibacterial agents are new Antibacterial agent has the advantages of high efficiency, long-lasting, broad-spectrum, renewable and non-toxic; N-halamine refers to the compound containing N-X bond (X can be Cl, Br, I), which can be composed of The precursor compound of amide or imide group is obtained by reacting with an oxidizing agent (such as hypochlorite); its antibacterial mechanism is due to the release of strong oxidizing halogen cations by N-hal...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J7/14C08J5/18C08L1/02
CPCC08J5/18C08J7/12C08J7/126C08J7/14C08J2301/02C08J2479/02
Inventor 张胜利凯橙橙刘伯芳张思略周祚万姜曼王群李勇
Owner SOUTHWEST JIAOTONG UNIV
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