Preparation process of poly-1,8-naphthalenediamine

A naphthalene diamine and chemical oxidation technology, applied in 1 field, can solve problems such as production area constraints and inability to obtain a large amount of polymers, and achieve high production rate and large production scale

Inactive Publication Date: 2008-06-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of naphthalene diamine polymers is mostly an electrochemical method, and there is no report on the synthesis of poly-1,8 naphthalene diamine by chemical oxidation polymerization at home and abroad.
The synthesis method of poly-1,8-naphthalene diamine has always been limited to the electrochemical oxidation polymerization method. The reaction site is near the electrode surface, and the generated polymer generally forms a film on the electrode surface. Obviously, the production area is limited by the size of the electrode area. Constraints, inability to obtain large quantities of polymer

Method used

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  • Preparation process of poly-1,8-naphthalenediamine
  • Preparation process of poly-1,8-naphthalenediamine

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Accurately weigh 0.791 g (5 mmol) of 1,8-naphthalene diamine and dissolve it in 50 mL of acetonitrile, and ultrasonicate for 3 to 5 minutes to promote its full dissolution. Weigh 1.141 g (5 mmol) of ammonium persulfate according to the oxidant monomer ratio of 1:1, dissolve it in 50 mL of distilled water, and place it in a constant temperature water bath at 20° C. to preheat to the reaction temperature. The oxidant solution at 20°C is added dropwise to the monomer solution at a rate of about 1 drop / 3s. After the dropwise addition, the reaction was continued for 6h. After the reaction is finished, filter, and wash the initial product with distilled water until the filtrate is colorless, then transfer the polymer filter cake to a beaker and continue to stir and wash overnight, and obtain a soft black powdery polymer after suction drying, with a yield of 0.672g and a yield of 85.0%.

Embodiment 2

[0016] Accurately weigh 0.791 g (5 mmol) of 1,8-naphthalene diamine and dissolve it in 50 mL of acetonitrile, and ultrasonicate for 3 to 5 minutes to promote its full dissolution. Weigh 0.5705g (2.5mmol) ammonium persulfate according to the oxidant monomer ratio of 0.5:1 and dissolve it in 50mL of distilled water, and place it in a constant temperature water bath at 20°C to preheat to the reaction temperature. The 20°C oxidant solution was added dropwise to the monomer solution. After the dropwise addition, the reaction was continued for 6h. After the reaction is finished, filter, and wash the initial product with distilled water until the filtrate is colorless, then transfer the polymer filter cake to a beaker and continue to stir and wash overnight, and obtain a soft black powdery polymer after suction drying, with a yield of 0.245g and a yield of 31.0%.

Embodiment 3

[0018] Accurately weigh 0.791 g (5 mmol) of 1,8-naphthalene diamine and dissolve it in 50 mL of acetonitrile, and ultrasonicate for 3 to 5 minutes to promote its full dissolution. Weigh 2.282g (10mmol) of ammonium persulfate according to the oxidant monomer ratio of 2:1, dissolve it in 50mL of distilled water, and place it in a constant temperature water bath at 20°C to preheat to the reaction temperature. The 20°C oxidant solution was added dropwise to the monomer solution. After the dropwise addition, the reaction was continued for 6h. After the reaction is finished, filter, and wash the initial product with distilled water until the filtrate is colorless, then transfer the polymer filter cake to a beaker and continue stirring and washing overnight, and obtain a soft black powdery polymer after suction drying, with a yield of 0.775g and a yield of 98.0%.

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Abstract

The present invention is preparation process of 1, 8-naphthalene diamine homopolymer. The chemical oxidation process of preparing poly1, 8-naphthalene diamine includes the following steps: dissolving 1, 8-naphthalene diamine in organic solvent, adding water solution of oxidant into the monomer solution to react, and post-treatment. The process has water or organic solvent as polymerization medium, and is simple, and high in 1, 8-naphthalene diamine homopolymer yield up to 98.0 %. The present invention provides new way of preparing 1, 8-naphthalene diamine homopolymer.

Description

technical field [0001] The invention belongs to the field of preparation methods of 1,8-naphthalene diamine homopolymer. Background technique [0002] The amine and imine groups in the naphthalene diamine polymer structure can endow the naphthalene diamine polymer with multifunctionality, the most notable of which is the molar concentration of metal ions such as Ag at the ppm level + , Hg 2+ 、Cu 2+ , Pb 2+ 、VO 2+ etc. sensitivity. Because it contains a large number of free amine groups in its structure, it is adjacent to the imine group, and it can undergo complexation reactions with heavy metal ions to form stable complexes or undergo redox reactions to reduce metal ions to electrically neutral metals. In this way, functions such as enrichment and detection of metal ions can be realized. The preparation of naphthalene diamine polymers is mostly electrochemical, and there is no report on the synthesis of poly-1,8 naphthalene diamine by chemical oxidation polymerization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02
Inventor 黄美荣李新贵
Owner TONGJI UNIV
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