Chitosan / ion liquid conductive compound film and preparation thereof

A technology of ionic liquid and chitosan, which is applied in the field of polymers, can solve the problems of limiting the application of chitosan and poor conductivity

Inactive Publication Date: 2009-08-12
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, poor electrical conductivity and so on limit the application of chitosan in a wider range of fields

Method used

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  • Chitosan / ion liquid conductive compound film and preparation thereof
  • Chitosan / ion liquid conductive compound film and preparation thereof
  • Chitosan / ion liquid conductive compound film and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1, the preparation of chitosan / [CCIm]Cl composite conductive film

[0061] (1) Preparation of 1,4-diimidazolidine

[0062] Weigh 27.2 grams of imidazole (0.4mol) and dissolve in 48ml of toluene and 48ml of dimethyl sulfoxide mixed solution, then add 50% sodium hydroxide solution (containing 0.4mol of sodium hydroxide), connect the water separator and heat to 130 ~170°C, react until no water is generated, cool down; then move the reactor to an ice-water bath, slowly add 1,4-dibromobutane (0.2mol) dropwise at a rate of 3~5mL / min; Reaction 2 hours, a pale yellow solid was generated, and the toluene and dimethyl sulfoxide were removed by filtration to obtain a crude product.

[0063] The obtained crude product was dissolved in chloroform, sodium bromide was removed by filtration, and chloroform was distilled off under reduced pressure to obtain a reddish-brown liquid; 150 mL of distilled water was added thereto, mixed evenly, and left to stand for 12 hours to pr...

Embodiment 2

[0073] Embodiment 2, chitosan / [CCIm]CH 3 Preparation of COO Composite Conductive Film

[0074] (1) Preparation of 1,4-diimidazolidine

[0075] With embodiment 1.

[0076] (2) Chlorinated N, N'-dicarboxymethyl-1,4-diimidazolidine ionic liquid ([CCIm]CH 3 COO) preparation

[0077] With embodiment 1.

[0078] (3) Ionic liquid [CCIm]CH 3 Preparation of COO

[0079] Weigh 0.12 mol of sodium acetate and 0.1 mol of [CCIm]Cl and dissolve in 20 ml of acetonitrile, stir the mixed solution at room temperature for 48 hours, remove NaCl by filtration, evaporate the acetonitrile, wash the precipitate with 300 ml of diethyl ether three times, and finally obtain a white viscous Thick material, 92% yield.

[0080] 1 H NMR (CD 3 OD, δ) 8.08 (s, 1, H 2 (Im)), 7.324-7.340 ((m, 1, H 5 (Im)), 7.088 (m, 1, H 4 (Im)), 3.83-3.87 (t, 4, NCH 2 CH 2 ), 2.495(t, 4, NCH 2 COOH), 1.648-1.709 (t, 4, NCH 2 CH 2 ).

[0081] (4) Chitosan / [CCIm]CH 3 Preparation of COO Composite Conductive Film ...

Embodiment 3

[0086] Embodiment 3, chitosan / [CCIm] BF 4 Preparation of Composite Conductive Film

[0087] (1) Preparation of 1,4-diimidazolidine

[0088] With embodiment 1.

[0089] (2) Preparation of chlorinated N, N'-dicarboxymethyl-1,4-diimidazolidine ionic liquid ([CCIm]Cl)

[0090] With embodiment 1.

[0091] (3) Ionic liquid [CCIm]BF 4 preparation of

[0092] Weigh 0.12 mol of sodium acetate and 0.1 mol of [CCIm]Cl and dissolve in 20 ml of acetonitrile, stir the mixed solution at room temperature for 48 hours, remove NaCl by filtration, evaporate the acetonitrile, wash the precipitate with 300 ml of diethyl ether three times, and finally obtain a white viscous Thick substance, yield 90.6%.

[0093] 1 H NMR (CD 3 OD, δ) 8.08 (s, 1, H 2 (Im)), 7.324-7.340 ((m, 1, H 5 (Im)), 7.088 (m, 1, H 4 (Im)), 3.83-3.87 (t, 4, NCH 2 CH 2 ), 2.495(t, 4, NCH 2 COOH), 1.648-1.709 (t, 4, NCH 2 CH 2 ).

[0094] (4) Chitosan / [CCIm]BF 4 Preparation of Composite Conductive Film

[0095] 0...

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Abstract

The invention provides a chitosan / ionic liquid conductive composite film. The film is prepared by the following steps: dissolving chitosan and ionic liquid in distilled water at a mol ratio of 1:0.26-1:5 by weight; heating to 40-70 DEG C to vaporize part of water to allow the solution in gel state; then injecting the solution into a polytetrafluoroethylene mould and stirring at room temperature; transferring the mould into a vacuum drying oven after water is completely volatilized; and drying at the temperature of 30-50 DEG C for 12-24h to obtain the film. The prepared chitosan / ionic liquid conductive composite film has room-temperature conductivity up to 0.44*10-0.68*10Scm in water-free condition and can be doped with I2 due to introduction of the ionic liquid containing I anions, thus the conductivity of the film can be increased by an order of magnitude and reach 0.97*10Scm at most. The chitosa / ionic liquid conductive composite film has wide application prospects in energy sources, photoelectronic devices, information, sensors, molecular conducting wire and molecular devices, as well as electromagnetic shielding, anticorrosion of metal and stealth technologies.

Description

technical field [0001] The invention belongs to the technical field of polymers, and relates to a polymer composite material, in particular to a chitosan / ionic liquid conductive composite film; the invention also relates to a preparation method of the chitosan / ionic liquid conductive composite film. Background technique [0002] Chitosan, deacetylated chitin, is degradable and biocompatible, and is widely used in biological or medical materials, such as wound treatment, antibacterial activity, tissue engineering, and artificial skin. However, poor electrical conductivity and so on limit the application of chitosan in a wider range of fields. The structure of chitosan is as follows: [0003] [0004] n=500~1000. [0005] Because of its high ionic conductivity, wide electrochemical window, and no vapor pressure, ionic liquids have broad application prospects in batteries, capacitors, transistors, electrodeposition, electrolytes, etc.; ionic liquids can also be used as sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08K5/3445C08J5/18H01B1/20
Inventor 熊玉兵王泽王荣民吴称意王鸿
Owner NORTHWEST NORMAL UNIVERSITY
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