Preparation method of polypyrrole hydrogel

A technology of polypyrrole hydrogel and gel, which is applied in the field of preparation of polypyrrole hydrogel, can solve the problems of long preparation period, high cost, low content of polypyrrole in hydrogel, etc., and achieve low cost of large-scale production, The effect of mild reaction conditions and excellent water absorption performance

Inactive Publication Date: 2012-10-10
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of polypyrrole hydrogel in the prior art is generally more complicated, the preparation cycle is long, and the cost is higher
Moreover, the content of polypyrrole in the prepared hydrogel is low and the distribution is uneven

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Add 2mmol of pyrrole monomer and 0.5mmol of Orange II into 10mL of deionized water respectively, then slowly add 10mL of 0.2mol / L ferric sulfate aqueous solution to it, and then stand at 20°C for 24 hours;

[0018] 2) Purify and balance the product obtained in step 1) in distilled water (the volume of distilled water is 2-20 times that of the product obtained in step 1) for 1 week, and change the water every 24 hours to obtain polypyrrole hydrogel. The swelling ratio of the polypyrrole hydrogel was 15, which indicated that the obtained polypyrrole hydrogel had excellent water absorption properties.

Embodiment 2

[0020] 1) Add 5 mmol of pyrrole monomer and 1 mmol of Acid Scarlet G to 20 mL of deionized water respectively, then slowly add 20 mL of 0.5 mol / L ferric chloride aqueous solution to it, and then stand at 10°C for 30 hours;

[0021] 2) Purify and balance the product obtained in step 1) in distilled water (the volume of distilled water is 2-20 times that of the product obtained in step 1) for 1 week, and change the water every 24 hours to obtain polypyrrole hydrogel. The swelling ratio of polypyrrole hydrogel was 15.

Embodiment 3

[0023] 1) Add 8 mmol of pyrrole monomer and 2 mmol of Direct Red 31 to 30 mL of deionized water respectively, then slowly add 25 mL of 0.6 mol / L ferric nitrate aqueous solution into it, and then stand at 20°C for 24 hours;

[0024] 2) Same as step 2) in Example 1. The swelling ratio of the polypyrrole hydrogel is 12, indicating that the obtained polypyrrole hydrogel has excellent water absorption properties.

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Abstract

The invention discloses a polypyrrole hydrogel and a preparation method thereof. The preparation method of the polypyrrole hydrogel is characterized by including the following steps of: 1) adding 2-10 mmol of pyrrole monomer and 0.5-3 mmol of a dye respectively into 10-30 mL of deionized water, and then slowly adding 10-30 mL of an oxidant-containing aqueous solution with a concentration of 0.2-1 mol / L, and standing for 24 to 36 hours at 10-20 DEG C; and 2) purifying and balancing the product obtained by the step 1) in distilled water for 1 week, and changing water every 24 hours, so as to obtain the polypyrrole hydrogel. The invention has advantages of mild reaction conditions, simple process, low cost on mass production and excellent water absorbing property of the polypyrrole hydrogel.

Description

technical field [0001] The invention relates to a preparation method of hydrogel, in particular to a preparation method of polypyrrole hydrogel. Background technique [0002] Hydrogels are gels in which water is the dispersion medium. Water-soluble or hydrophilic polymers can form a three-dimensional network structure containing a large amount of water through certain chemical or physical cross-linking. This kind of material has unique mechanical properties, swelling properties, stimuli responsiveness and biocompatibility, and has become an increasingly active research field in the interpenetration of material science, chemistry and biomedicine, and has been widely used. Conductive polymer hydrogel materials have both the properties of hydrogels and the excellent electrochemical activity of conductive polymers, and have aroused great interest in recent years. [0003] According to the cross-linking method and material structure of conductive polymer hydrogels, they can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06
Inventor 李亮张强郑华明夏克强鄢国平喻湘华
Owner WUHAN INSTITUTE OF TECHNOLOGY
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