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A bacterial cellulose/poly(3,4-ethylenedioxythiophene) nanometer conductive composite material and a preparing method thereof

A technology of ethylenedioxythiophene and bacterial cellulose, which is applied in the field of bacterial cellulose/poly 3,4-ethylenedioxythiophene nano-conductive composite material and its preparation, can solve the problem of loss of three-dimensional network structure, difficult structural uniformity, and limitations Research and other issues to achieve the effect of uniform chemical structure, unique performance and good biocompatibility

Inactive Publication Date: 2014-08-13
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] (1) The conductive PEDOT:PSS element prepared in Document 1 only has good conductivity on the surface and can be used as a capacitor element, but its interior is still a non-conductive fiber, which limits its application in other fields
[0010] (2) The composite material disclosed in Patent 1 contains benzidine in the process of synthesizing polyaniline, because benzidine is toxic and a carcinogen, thus limiting the research of researchers on it
[0011] (3) The composite material polypyrrole disclosed in Patent 2 is flocculent and disordered, and loses the three-dimensional network structure
[0012] The above-mentioned defects make it difficult to obtain bacterial cellulose conductive composite materials with uniform structure, stable performance, excellent biocompatibility, and a three-dimensional porous network structure so far.

Method used

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  • A bacterial cellulose/poly(3,4-ethylenedioxythiophene) nanometer conductive composite material and a preparing method thereof
  • A bacterial cellulose/poly(3,4-ethylenedioxythiophene) nanometer conductive composite material and a preparing method thereof
  • A bacterial cellulose/poly(3,4-ethylenedioxythiophene) nanometer conductive composite material and a preparing method thereof

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preparation example Construction

[0034] combine figure 1 , a preparation method of bacterial cellulose / poly 3,4-ethylenedioxythiophene nano-conductive composite material, the steps are as follows:

[0035] The first step: get the bacterial cellulose membrane (film thickness 1mm~1cm) of Acetobacter xylinum dynamic fermentation, and the bacterial cellulose floc of static fermentation, use the NaOH of 0.1%~4% and 0.1%~4%H 2 o 2 Treat at 60-90°C for 1-5 hours. Rinse off with running tap water. (obtain pure bacterial cellulose raw material with three-dimensional network structure)

[0036] Step 2: Cut the cleaned bacterial cellulose wet film into small pieces of 1-3cm×1.5-4cm, and the bacterial cellulose flocs are dispersed in water with a mass concentration of 0.1%-5% and plasticized with containers of different shapes, placed in Freeze-dry in a freeze dryer for 10 to 24 hours, equipped with a vacuum bag. (Cellulosic material made into faceted small pieces)

[0037] Step 3: Prepare 0.01-0.5g / L EDOT and anhy...

Embodiment 1

[0046] The bacterial cellulose film obtained by the static fermentation of Acetobacter xylinum was treated with 0.1% NaOH and 0.1% H 2 o 2 Treat in a water bath at 80°C for 2 hours, take out tap water and rinse until neutral; cut into regular 2cm×2cm small pieces with scissors, place them in a freeze dryer for 24 hours, take out and place in 10mL of 0.05g / mLEDOT (3 , 4-ethylenedioxythiophene) ether solution, ultrasonic at 20°C for 30 minutes, then add an equal volume of 0.05 g / mL anhydrous ferric trichloride ether solution, quickly transfer to ultrasonic cleaning agent, and ultrasonically react at 20°C for 30 minutes , then take it out and wash it repeatedly three times with ethanol and deionized water successively, soak it overnight with deionized water for the last time, take it out and freeze-dry it to obtain the bacterial cellulose / poly-3,4-ethylenedioxythiophene composite material.

Embodiment 2

[0048] The bacterial cellulose film obtained by the static fermentation of Acetobacter xylinum was treated with 0.2% NaOH and 0.2% H 2 o 2 Treat in a water bath at 90°C for 2 hours, take out tap water and rinse until neutral; cut into regular pieces of 1cm×1cm with scissors, place them in a freeze dryer for 20 hours, take out and place in 10mL of 0.05g / mLEDOT (3 , 4-ethylenedioxythiophene) ethyl pure solution, 20 ℃ constant temperature ultrasonic 30min, then add an equal volume of 0.05g / mL anhydrous ferric trichloride ethyl ether solution, 20 ℃ constant temperature ultrasonic reaction 30min, then take out and transfer to 20 ℃ Place it in a constant temperature environment for 24 hours. When the ethanol is fully volatilized, the reaction is complete. After that, it is washed with ethanol and deionized water repeatedly three times, and the last time it is soaked in deionized water overnight, taken out and freeze-dried to obtain bacterial cellulose / poly 3,4- Ethylenedioxythiophe...

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Abstract

The invention discloses a bacterial cellulose / poly(3,4-ethylenedioxythiophene) nanometer conductive composite material and a preparing method thereof. The method includes: a step of removing impurities of bacterial cellulose fermented by acetobacter xylinum, pretreating to obtain a clean bacterial cellulose raw material, and performing freeze-drying to obtain bacterial cellulose aerogel; a step of adding the bacterial cellulose aerogel into a 3,4-ethylenedioxythiophene solution, dispersing uniformly, and performing ultrasonic processing so as to allow the ethylenedioxythiophene monomer to be fully adsorbed by the bacterial cellulose; a step of adding a solution of ferric chloride anhydrous with the same volume, performing in-situ oxidation polymerization under ultrasonic constant-temperature conditions, and a step of subjecting the obtained crude product to ultrasonic washing with methanol (or ethanol) and deionized water repeatedly, fully dipping the crude product with deionized water, and performing freeze-drying to obtain the nanometer conductive composite material. The nanometer conductive composite material has advantages of low cost, mild reaction, high speed, good biocompatibility and a three-dimensional net structure.

Description

technical field [0001] The invention relates to a method for in-situ polymerizing and covering nano conductive polymers on nano fibers, in particular to a bacterial cellulose / poly 3,4-ethylenedioxythiophene nano conductive composite material and a preparation method thereof. Background technique [0002] Conductive polymers have been widely used in the preparation of electrochemical biosensors in recent years due to their excellent electrical conductivity, high specific surface area, easy preparation and good biocompatibility. Among many conductive polymers, poly-3,4-ethylenedioxythiophene (PEDOT) has attracted much attention due to its good environmental stability, adjustable structure and properties. [0003] Bacterial Cellulose (BC for short) is a kind of polymer compound produced by some bacteria, which is superior to plant cellulose in terms of purity, tensile strength, Young's modulus and other physical and chemical properties, and has a higher biological Adaptability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L65/00C08L1/02C08G61/12
Inventor 孙东平陈春涛冯章启吴琪露杨加志张衡于亚林赵梦尧李康明袁凡舒
Owner NANJING UNIV OF SCI & TECH
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