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Graphene oxygen fluoride and polyimide composite powder coating and preparation method thereof

A graphene composite polyimide, powder coating technology, applied in powder coatings, coatings and other directions, can solve the problems of strong interface, performance improvement is not expected, lack and other problems, achieve good hydrophobicity, improve surface mechanical properties , Increase the effect of interface interaction

Inactive Publication Date: 2017-05-17
ANHUI RONGJIU OPTICAL FIBER COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because graphene sheets are easy to agglomerate and often lack strong interfacial interactions, the performance improvement of polymer composites prepared directly with graphene as a filler has not met expectations

Method used

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Embodiment Construction

[0019] A kind of oxyfluorinated graphene composite polyimide powder coating, it is made by the raw material of following weight part:

[0020] Polyimide 100, fluorinated graphite 10, potassium persulfate 0.1, sodium nitrate 1, potassium permanganate 0.1, sebacic acid 4, phosphorus pentoxide 0.5, dicyclohexylcarbodiimide 0.1, 4 dimethylamino Pyridine 0.1, tributyl citrate 6.

[0021] A kind of preparation method of described oxyfluorinated graphene composite polyimide powder coating comprises the following steps:

[0022] (1) Mix the above-mentioned fluorinated graphite, potassium persulfate and phosphorus pentoxide, add it to a 96% sulfuric acid solution that is 5 times the weight of the mixture, put it into an oil bath at 80°C, keep it warm and stir for 8 hours, Discharge, filter, wash the precipitate with water for 3 times, dry at 60°C for 10 hours, mix with the above-mentioned sodium nitrate, add to the 90% sulfuric acid solution that is 17 times the weight of the mixture,...

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Abstract

The invention discloses a graphene oxygen fluoride and polyimide composite powder coating which is prepared from the following raw materials in parts by weight: 100 to 110 parts of polyimide, 10 to 14 parts of carbon monofluoride, 0.1 to 0.3 part of potassium peroxodisulfate, 1 to 2 parts of sodium nitrate, 0.1 to 0.4 part of potassium hypermanganate, 4 to 6 parts of sebacic acid, 0.5 to 1 part of phosphorus pentoxide, 0.1 to 0.2 part of dicyclohexylcarbodiimide, 0.1 to 0.2 part of 4-dimethylamiopryidine and 6 to 10 parts of tributyl citrate. According to the graphene oxygen fluoride and polyimide composite powder coating, firstly, sebacic acid is grafted into graphene oxygen fluoride with relatively high dispersivity, and a carboxyl with chemical reaction activity is retained at the tail end of each sebacic acid aliphatic chain of a composite material, so that the structural factors promote a polyimide molecular chain to be plugged between graphene oxygen fluoride slices more easily, and the interface action between the graphene oxygen fluoride and the polyimide can be enhanced; therefore, the dispersivity of grafted inorganic particles among polymers can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a graphene oxyfluoride composite polyimide powder coating and a preparation method thereof. Background technique [0002] Fluorinated graphene maintains the two-dimensional carbon layer structure of graphene, and its chemical composition is similar to polytetrafluoroethylene, so it has the properties of both graphene and polytetrafluoroethylene. Fluorinated graphene has high temperature resistance equivalent to that of polytetrafluoroethylene. It begins to decompose slowly when the temperature is higher than 260 ° C, and decomposes rapidly when the temperature rises above 400 ° C. The properties of fluorinated graphene such as hydrophobicity, solvent resistance and chemical inertness are also particularly prominent. Like graphene oxide, fluorinated graphene also seriously destroys the original highly conjugated structure due to the introduction of sp3 C-C structure, thus...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D5/03C09D7/12
CPCC08K3/04C08K3/32C08K5/092C08K5/11C08K5/29C08K5/3432C08K13/02C09D5/03C09D7/61C09D7/63C09D179/08
Inventor 谷道荣
Owner ANHUI RONGJIU OPTICAL FIBER COMM
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