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Composite of poly m-phenylenediamine and nano silver and original position reduction preparing method thereof

A poly-m-phenylenediamine, m-phenylenediamine technology, applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problems of complex process, power consumption, and the size of the electrode surface area cannot be carried out, reaching Equipment simple effect

Inactive Publication Date: 2007-08-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition to the above-mentioned methods of preparing polymer-nano-gold composites by electrochemical polymerization, there are also photoreduction methods, reduction methods with external reducing agents, etc., but these methods are relatively complicated in process, cumbersome in operation, large in energy consumption, and the reaction is relatively limited. Difficult to promote and apply due to multiple conditions
For example, the most widely used electrochemical method needs to deposit a layer of polymer film on the electrode by electrochemical method, and then deposit gold nanoparticles in the polymer film by a certain electrochemical method. This method needs to consume electric energy and is subject to Large-scale production is not possible due to the size limitation of the electrode surface area
In addition, in the researches on polyphenylenediamine and metal composites reported at home and abroad, most of them are the preparation research of poly-o-phenylenediamine and metal composites, and there is no research on the composite of poly-m-phenylenediamine and nano silver Report on the preparation method

Method used

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  • Composite of poly m-phenylenediamine and nano silver and original position reduction preparing method thereof
  • Composite of poly m-phenylenediamine and nano silver and original position reduction preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 4.3256g (0.04mol) m-phenylenediamine and dissolve it in 100mL of 1mol / L hydrochloric acid solution, weigh 27.384g (0.12mol) ammonium persulfate and dissolve it in 100mL with a concentration of 1mol / L in the hydrochloric acid solution. The oxidant solution was added dropwise to the monomer solution at 30°C. The oxidant was added dropwise to start timing, and the reaction lasted for 24 hours. The black powdery polymer in doped state was obtained, soaked in ammonia water or sodium hydroxide solution, stirred for 24 hours, filtered, washed and dried to obtain poly-m-phenylenediamine in de-doped state. Yield 4.25g, yield 98.3%.

Embodiment 2

[0018] Weigh 4.3256g (0.04mol) m-phenylenediamine and dissolve it in 100mL of 1mol / L hydrochloric acid solution, weigh 9.126g (0.04mol) ammonium persulfate and dissolve it in 100mL with a concentration of 1mol / L in the hydrochloric acid solution. The oxidizing agent solution was added dropwise to the monomer solution at 65°C. The oxidant was added dropwise to start timing, and the reaction lasted for 24 hours. The black powdery polymer in doped state was obtained, soaked in ammonia water or sodium hydroxide solution, stirred for 24 hours, filtered, washed and dried to obtain poly-m-phenylenediamine in de-doped state. Yield 3.50g, yield 80.9%.

Embodiment 3～4

[0020] Get 50 mg of the product of Example 1, drop into 25 mL of silver ion solution with an initial concentration of 0.5 mmol / L at 30° C. and stir for 24 hours. ~20nm (Figure 1). Correspondingly, under the same conditions, changing the initial silver ion concentration to 2.5mmol / L, the particle size of the silver particles in the composite of poly-m-phenylenediamine and nano-silver is 50-100nm (Figure 2). Among them, some of them are single crystal particles, which can be confirmed by the electron diffraction pattern (Figure 3).

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Abstract

The invention discloses a preparing method of poly m-phenylenediamine / nanometer metal composite, which comprises the following steps: preparing poly m-phenylenediamine through chemical oxygenize method; adding into silver ion solution; reacting; filtering; getting the product. The method of original position deacidized metallic ion from metallic salt water solution with conductive polymer is spontaneous without electric drive, which is prepared to electrode position original position deacidized metallic ion method. The particle size of silver particle of this product can decrease to 10-20 nm, which is influenced by density and response time of silver ion.

Description

technical field [0001] The invention relates to the technical field of preparation methods of poly-m-phenylenediamine / nano-metal organic-inorganic composites. Background technique [0002] In recent years, the research on polyphenylenediamine composites is in the ascendant. Polyphenylenediamine can form various composite materials with simple metals, montmorillonite, carbon nanotubes, polyvinyl alcohol, etc., and they all show excellent functions. sex. The polyphenylenediamine / carbon nanotube composite has a large specific surface area due to its nano-microporous structure, and has a strong adsorption capacity for metal ions. Excellent detection ability, the detection concentration is as low as 0.25 and 0.33ppb, and the linear detection range is 5-100ppb. It is an electrochemical sensor with excellent performance [Gao X H, Wei W Z, Yang L, et al.Carbon nanotubes / poly( 1,2-diaminobenzene) nanoporous composite film electrode prepared by multiplus potentiostatic electropolyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K3/08C08G73/02
CPCY02P20/10
Inventor 黄美荣孙晋李新贵
Owner TONGJI UNIV
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