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Novel graphene-covered titanate compound and preparation method thereof

A technology of ene-coated titanate and composites, which is applied in the field of new composites of graphene-coated titanate and its preparation, can solve the problems of ineffective modification, limited application, dispersibility of titanate Problems such as poor fluidity, to achieve the effect of not easy to block the feed port, good fluidity, and not easy to break

Active Publication Date: 2017-05-10
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in fact, the dispersibility and fluidity of titanate in the matrix are not good. The reason is that the functional groups on the surface of titanate have only a small amount of hydroxyl groups, so the effect of modification is not obvious, which limits its further application in composite materials. application

Method used

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  • Novel graphene-covered titanate compound and preparation method thereof
  • Novel graphene-covered titanate compound and preparation method thereof
  • Novel graphene-covered titanate compound and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] 1) Preparation of graphene oxide dispersion

[0039] Get 1g (100 mesh) natural flake graphite and 500ml mass concentration be 98% sulfuric acid after mixing evenly, add 0.5g potassium nitrate, add 8g potassium permanganate rapidly in the water bath of 5 ℃, mix well, add the potassium permanganate The process maintains the system temperature at 0-20°C. Then the temperature of the system was raised to 60° C., reacted for 2 hours, added 100 ml of deionized water, and simultaneously raised the temperature of the system to 90° C. for 10 minutes, then added 145 ml of distilled water and 5 ml of hydrogen peroxide (30 wt %) to reduce excess potassium permanganate to terminate the reaction. Obtain graphite oxide.

[0040] After graphite oxide was washed to neutrality, deionized water was added to form a graphene oxide dispersion, which was ultrasonicated for 4 hours at 40 kHz in an ultrasonic machine to obtain a 2 g / L, 5 μm graphene oxide dispersion.

[0041] 2) Preparation of...

Embodiment 2

[0046] 1) Preparation of graphene oxide dispersion

[0047] Take 4g (3000 mesh) of natural flake graphite and 200ml of sulfuric acid with a mass concentration of 98% and mix evenly, then add 4g of potassium nitrate, quickly add 32g of potassium permanganate in a water bath at 5°C, mix well, and add potassium permanganate Keep the system temperature at 0-20°C. Then the temperature of the system was raised to 50°C, reacted for 3h, added 24L of water, and simultaneously raised the temperature of the system to 80°C for 25min, then added 2L of distilled water and 12mL of hydrogen peroxide (30wt%) to reduce the excess potassium permanganate, and terminated the reaction to obtain graphite oxide system.

[0048] After graphite oxide was washed to neutrality, a mixed solution of formamide was added to form a graphene oxide dispersion, which was ultrasonicated for 6 hours at 20 kHz in an ultrasonic machine to obtain a 2 g / L, 5 μm graphene oxide dispersion.

[0049] 2) Preparation of t...

Embodiment 3

[0054] 1) Preparation of graphene oxide solution

[0055] Take 0.5g (10000 mesh) of natural flake graphite and 20ml mass concentration of 98% sulfuric acid and mix evenly, add 0.6g potassium nitrate, quickly add 3g potassium permanganate in a water bath at 15°C, mix well, add potassium permanganate The process maintains the system temperature at 0-20°C. Then the temperature of the system was raised to 45°C, reacted for 2.5h, added 15ml of water, and simultaneously raised the temperature of the system to 85°C for 20min, then added 10ml of distilled water and 3mL of hydrogen peroxide (30wt%) to reduce excess potassium permanganate, and terminated the reaction. A graphite oxide system is obtained.

[0056] Graphite oxide was washed to neutral, then freeze-dried, and N-methylpyrrolidone was added to make a graphene oxide dispersion, which was ultrasonicated at 28kHz for 3h in an ultrasonic machine to obtain a 1g / L, 50nm graphene oxide dispersion.

[0057] 2) Preparation of titan...

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Abstract

The invention provides a novel graphene-covered titanate compound. The novel graphene-covered titanate compound is prepared at least by the following components by weight: 0.01-10% of the graphene, 80-98.99% of the titanate, and 1-10% of a coupling agent. The invention further provides a preparation method for the novel graphene-covered titanate compound. The compound is capable of covering the surface of the titanate by the graphene and modifying the titanate. The mobility is good, the compound is not easily broken, and the feeding opening is not easily blocked. The surface modification is further carried out by the reduction-oxidation graphene containing abundant functional groups by which the surface is covered, and the graphene gives new functions to the titanate because of the characters of the heat conduction, electric conduction and toughness of the graphene.

Description

technical field [0001] The invention belongs to the field of new graphene materials and composite materials, and in particular relates to a novel composite of graphene-coated titanate for a novel structure-function integrated composite material and a preparation method thereof. Background technique [0002] There are many kinds of titanate products, which can be divided into alkali metal titanates, alkaline earth metal titanates, rare earth metal titanates, etc. according to their composition. Important position, especially for high-performance composites. The morphology of titanate includes flake, whisker, granular and so on. [0003] Alkali metal titanate is a kind of synthetic inorganic material with excellent performance. It has very stable chemical performance, excellent mechanical properties and unique physical characteristics. With its high strength, high hardness, high modulus, high heat resistance and other properties, it is widely used in reinforced plastics, wea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/04
CPCC09C1/36C09C3/006C09C3/043C09C3/063C01P2004/03C01P2006/40C01P2006/32
Inventor 暴宁钟李孟朔沈丽明李畅何大方
Owner NANJING UNIV OF TECH
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