Composite coating containing cardanol-based reactive diluent modified graphene oxide filler as well as preparation method and application of composite coating

A reactive diluent and cardanol-based technology, applied in the field of composite coatings and its preparation, can solve problems such as difficult construction operations, poor long-term anti-corrosion performance, and ecological environment crisis, and achieve improved anti-corrosion performance, improved barrier effect, and simple construction and operation Effect

Active Publication Date: 2022-04-12
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for better disperability and compatibility between carbon black particles used in coatings made from an organopolymerizable monomer solution containing poly(meth)acrylic acid). By adding this special type of chemical called Graphenephenols that are attached at specific positions along their length or side chains, it becomes possible to create strong films without compromising any properties such as durability against damage caused during welding operations. Additionally, these modifications allow for easier handling when applying them onto steel substrate surfaces due to improved solubility and stability compared to traditional methods like naphtha oil based paints. Overall, this new approach helps protect environments while promoting economic growth through reducing dependence upon fossil fuel sources.

Problems solved by technology

This patented technical problem addressed in this patent relates to finding ways to prevent or reduce damage done through sea water when working at steel structures without causing rustiness. Current methods involve applying various types of paints like chromium plasma onto surfaces which can cause cracks if exposed too much force repeatedly. To address these issues, there was proposed developing biological based coatings made entirely from cardanol called graphenoxy (Graphon Oxide) instead of expensive fossil fuel oil alternatives. However, while adding certain ingredients could help improve adhesion between different layers, current techniques still require significant amounts of energy input and produce waste products.

Method used

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  • Composite coating containing cardanol-based reactive diluent modified graphene oxide filler as well as preparation method and application of composite coating
  • Composite coating containing cardanol-based reactive diluent modified graphene oxide filler as well as preparation method and application of composite coating
  • Composite coating containing cardanol-based reactive diluent modified graphene oxide filler as well as preparation method and application of composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Utilize the Hummer's method of high-power continuous ultrasonic exfoliation of graphite oxide to obtain a graphene oxide aqueous solution, and then disperse the graphene oxide in absolute ethanol by solvent replacement, ultrasonic and combined with 800r / min mechanical stirring for 30min to obtain a mixture A;

[0038] (2) Add cardanol-based reactive diluent to the mixture A in the three-necked flask, the mass ratio of cardanol-based reactive diluent to graphene oxide in step (1) is 1:1, ultrasonic and combined with 1000r / min mechanical Stir for 30min to obtain mixture B;

[0039] (3) Add 0.1mol / L NaOH aqueous solution dropwise to the mixture B as a reaction catalyst, the amount added dropwise is 1% of the mass of the mixture B, and mechanically stir at a speed of 600r / min in a water bath at 70°C for 7h to obtain a mixture C ;

[0040] (4) The mixture C was centrifuged and washed 5 times with absolute ethanol, the centrifugal speed was 4000r / min, and the centrifugat...

Embodiment 2

[0046] (1) Utilize the Hummer's method of high-power continuous ultrasonic exfoliation of graphite oxide to obtain a graphene oxide aqueous solution, and then disperse the graphene oxide in absolute ethanol by solvent replacement, ultrasonic and combined with 800r / min mechanical stirring for 30min to obtain a mixture A;

[0047] (2) Add cardanol-based reactive diluent to mixture A in a three-necked flask, the mass ratio of cardanol-based reactive diluent to graphene oxide in step (1) is 2:1, ultrasonic and combined with 1000r / min mechanical Stir for 30min to obtain mixture B;

[0048] (3) Add 0.2mol / L NaOH aqueous solution dropwise to the mixture B as a reaction catalyst, the amount added dropwise is 1% of the mass of the mixture B, and mechanically stir at a speed of 600r / min in a water bath at 80°C for 5h to obtain a mixture C ;

[0049] (4) The mixture C was centrifuged and washed 5 times with absolute ethanol, the centrifugal speed was 4000r / min, and the centrifugation ti...

Embodiment 3

[0055] (1) Utilize the Hummer's method of high-power continuous ultrasonic exfoliation of graphite oxide to obtain a graphene oxide aqueous solution, and then disperse the graphene oxide in absolute ethanol by solvent replacement, ultrasonic and combined with 800r / min mechanical stirring for 30min to obtain a mixture A;

[0056] (2) Add cardanol-based reactive diluent to the mixture A in the three-necked flask, the mass ratio of cardanol-based reactive diluent to graphene oxide in step (1) is 10:1, ultrasonic and combined with 1000r / min mechanical Stir for 30min to obtain mixture B;

[0057] (3) Add 0.1mol / L NaOH aqueous solution dropwise to the mixture B as a reaction catalyst, the amount added dropwise is 1% of the mass of the mixture B, and mechanically stir at a speed of 600r / min in a water bath at 70°C for 6h to obtain a mixture C ;

[0058] (4) The mixture C was centrifuged and washed 5 times with absolute ethanol, the centrifugal speed was 4000r / min, and the centrifuga...

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Abstract

The invention discloses a composite coating containing cardanol-based reactive diluent modified graphene oxide filler and a preparation method and application thereof.The coating is composed of a component I and a component II, and the component I comprises 0.1-1.0 part of cardanol-based reactive diluent modified graphene oxide nanosheets; 50 to 80 parts of petroleum-based epoxy resin; 20-50 parts of a cardanol-based reactive diluent; the component II is prepared from 40 to 50 parts of cardanol-based curing agent; 0.01 to 0.2 part of a defoaming agent; 0.03 to 0.3 part of a leveling agent; and 0.05 to 0.2 part of an anti-settling agent. The cardanol-based reactive diluent modified graphene oxide nanosheet (A-GO) is designed and synthesized through a simple covalent functionalization method, the dispersity and compatibility of GO in an epoxy resin matrix are improved, and the defects existing in an epoxy resin coating can be effectively overcome. The A-GO is added into the cardanol-based reactive diluent, and the A-GO and the cardanol-based reactive diluent have a synergistic effect, so that the A-GO/cardanol-based diluent/epoxy resin composite coating is finally obtained.

Description

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Claims

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Application Information

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Owner NANJING UNIV OF TECH
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