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A three-dimensional crosslinked attapulgite/graphene/polyaniline composite anticorrosion material and its preparation method

A technology of attapulgite and anti-corrosion materials, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as curling and agglomeration, improve anti-corrosion performance, prevent stacking and agglomeration, and enhance mechanical properties Effect

Active Publication Date: 2018-10-16
常州纳欧新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-corrosion filler has a free lamellar structure, and there are problems such as curling and agglomeration

Method used

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  • A three-dimensional crosslinked attapulgite/graphene/polyaniline composite anticorrosion material and its preparation method
  • A three-dimensional crosslinked attapulgite/graphene/polyaniline composite anticorrosion material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1. Add 0.5 kg of amino-modified attapulgite and 2.5 kg of graphite oxide into 12.0 kg of deionized water respectively. After ultrasonic dispersion for 0.5 hours, while stirring, add 0.9 kg of aniline and 0.18 kg of nitrilotriacetic acid in turn, and place in 0 ℃ in ice water bath;

[0013] 2. Add dropwise 4.8 liters of ammonium persulfate solution with a molar concentration of 1.0 mol / liter to the dispersion obtained in step 1 to carry out oxidative polymerization and cross-linking reaction. After the dropwise addition is completed, stir and react at a constant temperature for 3.0 hours; filter, wash, freeze-dry , and pulverize to obtain a three-dimensional cross-linked attapulgite / graphene / polyaniline composite anticorrosion material.

Embodiment 2

[0015] 1. Add 2.0 kg of amino-modified attapulgite and 0.4 kg of graphite oxide into 48.0 kg of deionized water respectively. After ultrasonic dispersion for 2 hours, while stirring, add 2.4 kg of aniline and 1.5 kg of nitrilotriacetic acid in turn, and place in 4 ℃ in ice water bath;

[0016] 2. Add 12.9 liters of ammonium persulfate solution with a molar concentration of 4.0 mol / liter dropwise to the dispersion obtained in step 1 to carry out oxidative polymerization and crosslinking reaction. After the addition is completed, stir and react at a constant temperature for 6.0 hours; filter, wash, freeze-dry , and pulverize to obtain a three-dimensional cross-linked attapulgite / graphene / polyaniline composite anticorrosion material.

Embodiment 3

[0018] 1. Add 2.5 kg of amino-modified attapulgite and 1.0 kg of graphite oxide into 23.3 kg of deionized water respectively. After ultrasonic dispersion for 1.25 hours, while stirring, add 2.3 kg of aniline and 0.95 kg of nitrilotriacetic acid in sequence, and place in 2.5 ℃ in ice water bath;

[0019] 2. Add dropwise 12.3 liters of ammonium persulfate solution with a molar concentration of 2.0 mol / liter to the dispersion obtained in step 1 to carry out oxidative polymerization and cross-linking reaction. After the dropwise addition is completed, stir and react at a constant temperature for 4.5 hours; filter, wash, freeze-dry , and pulverize to obtain a three-dimensional cross-linked attapulgite / graphene / polyaniline composite anticorrosion material.

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Abstract

The invention discloses a three-dimensional structure attapulgite / graphene / polyaniline composite anti-corrosion filler, which comprises a one-dimensional structure attapulgite / polyaniline composite material and a two-dimensional structure attapulgite / polyaniline composite material. Polybasic acid is added into a system, so that the effect of a doping agent is achieved, and the effect of a cross-linking agent is also achieved. Aniline monomers adsorbed at the attapulgite surface and the graphite oxide layer take an in-situ oxidation polymerization reaction, and meanwhile, a graphite oxide sheet layer is supported open through a soft chemistry effect; then, polyaniline gel is generated through the effect of the cross-linking agent; meanwhile, one-dimensional attapulgite and two-dimensional graphene are connected, so that three-dimensional cross-linking structure attapulgite / graphene / polyaniline composite gel is formed; after freezing and drying, the three-dimensional cross-linking structure of the composite material can be still maintained; after the composite gel is added into paint, the anti-corrosion performance of a coating can be greatly improved.

Description

technical field [0001] The invention belongs to the field of anticorrosion fillers for coatings, and in particular relates to an attapulgite / graphene / polyaniline composite anticorrosion material and a preparation method thereof. Background technique [0002] Metal corrosion has caused serious losses to the national economy and serious harm to social life. In order to prevent metal corrosion, anti-corrosion paint is usually coated on the metal surface to isolate the corrosive medium from contacting the metal surface, so as to achieve anti-corrosion effect. Anti-corrosion fillers are the key components in anti-corrosion coatings. However, at present, most anti-corrosion fillers are metals or metal compounds, which contain heavy metals such as hexavalent chromium and lead. There are problems such as high cost, short anti-corrosion period and heavy metal pollution. subject to strict restrictions. Polyaniline has become a new generation of friendly and efficient anti-corrosion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02C08J3/075C08J3/24C09D5/08C09D175/04
CPCC08G73/0266C08J3/075C08J3/24C08J2379/02C09D5/08C09D175/04
Inventor 左士祥陈瑶姚超刘文杰罗士平李霞章魏科年
Owner 常州纳欧新材料科技有限公司
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