Polyimide composite coating and preparation method thereof and application thereof

A polyimide and composite coating technology, applied in coatings, anti-corrosion coatings, anti-fouling/underwater coatings, etc., can solve the problems of unsuitable on-site construction and cumbersome procedures, and achieve low cost, simple process, combined with good effect

Active Publication Date: 2016-08-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent is the previous research result of our research group. It uses electroless plating to prepare metal/polymer composite microspheres,

Method used

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  • Polyimide composite coating and preparation method thereof and application thereof
  • Polyimide composite coating and preparation method thereof and application thereof
  • Polyimide composite coating and preparation method thereof and application thereof

Examples

Experimental program
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Example

[0079] Examples 1 to 3:

[0080] In the following three embodiments, the substrate material is a PI / flake graphite (mass ratio 10%, 20%, 30%) composite coating deposited on the surface of a Q235 steel sheet with a thickness of about 2mm, and the coating thickness is ~100μm. The coating and the substrate The material is well combined; the specific preparation method of the PI / graphite composite coating is as follows:

[0081] 1. Weigh 10.002g of 4,4'-diaminodiphenyl ether (ODA), dissolve it in 200ml of N,N-dimethylformamide (DMF), stir to dissolve it completely (5min); then weigh Take 10.906 g of pyromellitic dianhydride (PMDA), add a small amount of multiple times to the above solution and stir; after the addition is complete, continue to stir for 8-10 hours to obtain a polyimide precursor polyamic acid solution;

[0082] 2. Add the additive-flake graphite (20μm in size) to the polyamic acid solution. The mass fractions of flake graphite are 10%, 20%, and 30%, respectively, and ultr...

Example

[0089] Examples 4~6

[0090] In the following three embodiments, the base material is a PI / nano Cu (mass ratio 10%, 20%, 30%) composite coating deposited on the surface of a 316 stainless steel sheet with a thickness of about 2mm, and the coating thickness is -20μm. The coating and the substrate The materials are well combined; the specific preparation method of the PI / Cu composite coating is as follows:

[0091] 1. Weigh 10.002g of 4,4'-diaminodiphenyl ether (ODA), dissolve it in 200ml of N,N-dimethylformamide (DMF), stir to dissolve it completely (5min); then weigh Take 10.906 g of pyromellitic dianhydride (PMDA), add a small amount of multiple times to the above solution and stir; after the addition is complete, continue to stir for 8-10 hours to obtain a polyimide precursor polyamic acid solution;

[0092] 2. Add additive-nano copper (particle size of 300nm) to the polyamic acid solution, the mass fraction of nano copper is 10%, 20%, 30%, respectively, ultrasonic and stirring fo...

Example

[0099] Examples 7-9

[0100] In this embodiment, the base material is a PI / micron Cu (mass ratio 10%, 20%, 30%) composite coating deposited on the surface of a Q345 steel sheet with a thickness of about 1.5mm. The coating thickness is ~200μm. The coating and the base material Good combination; the specific preparation method of the PI / micron Cu composite coating is as follows:

[0101] 1. Weigh 10.002g of 4,4'-diaminodiphenyl ether (ODA), dissolve it in 200ml of N,N-dimethylformamide (DMF), stir to dissolve it completely (5min); then weigh Take 10.906 g of pyromellitic dianhydride (PMDA), add a small amount of multiple times to the above solution and stir; after the addition is complete, continue to stir for 8-10 hours to obtain a polyimide precursor polyamic acid solution;

[0102] 2. Add additive-micron copper (200 mesh) to the polyamic acid solution, the mass fraction of micron copper is 10%, 20%, 30%, respectively, ultrasonic and stirring for 1~2h to finally obtain thermosetting...

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Abstract

The invention discloses a preparation method of polyimide composite coating. The method includes the following steps: step 1: preparing the polyimide spraying raw material, wherein the polyimide spraying raw material is thermosetting polyimide composite precursor slurry, thermoplastic polyimide composite precursor slurry or thermoplastic polyimide composite powder; step 2: performing surface oil-removing of the matrix and coarsening processing; and step 3: sending the spraying raw material prepared by step 1 to a thermal spraying flame flow, and spraying on the treated matrix surface to form the polyimide composite coating. The invention discloses the preparation method of polyimide composite coating, and the method has simple technology, high efficiency and low cost, and is suitable for site operation. The spraying is not limited by the size and shape of the workpiece. The prepared polyimide composite coating is combined well with the matrix, has effective antifouling and anticorrosion performances, and can be used for a plurality of antifouling and anticorrosion occasions such as external surface of industrial component used for ocean.

Description

technical field [0001] The invention relates to the technical field of composite coatings, in particular to a polyimide composite coating and its preparation method and application. Background technique [0002] The rapid development of the marine economy puts forward more demands and higher quality requirements for engineering equipment and living facilities in the seawater environment. In fields such as ships and ships, marine engineering equipment, and marine entertainment facilities, there will be more and more Most of the equipment is in service in the seawater environment. Biofouling and corrosion of marine engineering materials is a worldwide problem and the focus of attention that has always existed with the development and utilization of oceans by humans. [0003] Extensive research has been carried out on the corrosion of marine engineering materials at home and abroad, including the selection of corrosion-resistant material systems, surface coatings, cathodic pro...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D5/16C09D5/08C09D7/12C08G73/10B05D1/00B05D1/08B05D7/24
CPCB05D1/08B05D1/62B05D7/24B05D2301/00B05D2320/00B05D2505/50C08G73/1071C08K3/04C08K3/08C08K5/14C08K5/20C08K2003/085C08K2201/011C09D5/08C09D5/1687C09D179/08
Inventor 刘奕王鑫龚永锋黄晶所新坤陈秀勇李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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