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A kind of electrochemically prepared functionalized graphene flame retardant and its application

A flame retardant, graphene technology, applied in the chemical characteristics of fibers, the manufacture of fire-retardant and flame-retardant filaments, textiles and papermaking, etc., can solve the problems of non-compliance with green production, different material substrates, and cannot be completely restored, and achieve mechanical properties. Improve, improve the flame retardant performance, improve the effect of flame retardant efficiency

Active Publication Date: 2021-08-24
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the functionalized graphene flame retardant prepared by this method, on the one hand, the graphene oxide used is prepared by the improved Hummer method, and the graphene defect of the gained is more, can not be fully reduced and uses a lot of strong acid in the reaction process, Strong oxidants and reducing agents; on the other hand, the covalent modification of graphene oxide in an organic solvent system does not meet the requirements of green production
In addition, although the introduction of graphene can improve the flame retardant properties of materials to a certain extent, different material substrates have different influence factors on mechanical properties. How to achieve both flame retardant properties and mechanical properties is a key breakthrough technology. barrier

Method used

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  • A kind of electrochemically prepared functionalized graphene flame retardant and its application
  • A kind of electrochemically prepared functionalized graphene flame retardant and its application
  • A kind of electrochemically prepared functionalized graphene flame retardant and its application

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Effect test

Embodiment 1

[0044] Embodiment 1: Preparation of functionalized graphene flame retardant

[0045]The 0.5mm graphite paper made of expanded graphite is used as the anode, the copper rod is used as the cathode, and 150ml of 0.2mol / L sodium diethylenetriaminepentamethylene phosphonate is used as the electrolyte, and a DC voltage of 5V is applied for electrolysis for 6h, filtered, Wash and dry to obtain the graphene modified by sodium diethylenetriaminepentamethylene phosphate, get 1g of graphene modified by sodium diethylenetriaminepentamethylene phosphate and add it to 0.5mol / L ferric chloride aqueous solution (30mL) while stirring After ultrasonication for 3 hours, it was filtered, and the obtained precipitate was dried to obtain a functionalized graphene flame retardant.

[0046] High-magnification transmission electron microscopy of the prepared functionalized graphene flame retardant as figure 2 shown. It can be seen from the high-power transmission electron microscope analysis that t...

Embodiment 2

[0049] Embodiment 2: the preparation of functionalized graphene flame retardant

[0050] The 0.3mm graphite paper made of flake graphite is used as the anode, the copper rod is used as the cathode, and 150ml of 0.5mol / L sodium diethylenetriaminepentamethylene phosphonate is used as the electrolyte, and a DC voltage of 5V is applied for electrolysis for 6h, filtered, Wash and dry to obtain graphene modified by sodium diethylenetriaminepentamethylene phosphate, take 1g of graphene modified by sodium diethylenetriaminepentamethylene phosphate and add it to 0.5mol / L ferric chloride aqueous solution while stirring and ultrasonically for 3h , filtered, and the resulting precipitate was dried to obtain a functionalized graphene flame retardant.

[0051] The number of layers of the graphene of gained is 3 layers, 1 D / I G The value is 0.68, and the defect is relatively small.

Embodiment 3

[0052] Embodiment 3: the preparation of functionalized graphene flame retardant

[0053] The 1mm graphite paper made of highly oriented graphite is used as the anode, the copper rod is used as the cathode, and 150ml of 0.1mol / L sodium diethylenetriaminepentamethylene phosphonate is used as the electrolyte, and a DC voltage of 5V is applied for electrolysis for 6h, filtered, Wash and dry to obtain graphene modified by sodium diethylenetriaminepentamethylene phosphate, take 1g of graphene modified by sodium diethylenetriaminepentamethylene phosphate and add it to 0.5mol / L ferric chloride aqueous solution while stirring and ultrasonically for 3h , filtered, and the resulting precipitate was dried to obtain a functionalized graphene flame retardant.

[0054] The number of layers of the graphene of gained is 3 layers, 1 D / I G The value is 0.71, and the defect is relatively small.

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Abstract

The invention discloses an electrochemically prepared functionalized graphene flame retardant and an application thereof, belonging to the technical field of flame retardant composite materials. In the present invention, an aqueous solution of sodium diethylenetriaminepentamethylene phosphate is used as an electrolyte, a graphite sheet is used as an anode, and a copper rod is used as a cathode to electrolyze to obtain low-defect, few-layer graphene modified by sodium diethylenetriaminepentamethylene phosphate. Mixed with iron source to get functionalized graphene flame retardant. By blending the functionalized graphene flame retardant prepared by the present invention with polyacrylonitrile, a graphene / polyacrylonitrile nanocomposite material is obtained, which significantly improves the flame retardancy and thermal stability of the polyacrylonitrile material, and has no effect on the material The mechanical properties are not affected by damage, and it has broad application prospects in the fields of automotive interiors, clothing fabrics, tarpaulins, curtains and carpets.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant composite materials, and in particular relates to an electrochemically prepared functionalized graphene flame retardant and an application thereof. Background technique [0002] Polyacrylonitrile material is fluffy and curly in appearance, with better elasticity and better warmth retention than wool; it has excellent light fastness, acid resistance and oxidation resistance; it is widely used in automotive interiors, clothing fabrics, tarpaulins, curtains, carpets and other fields. However, the limiting oxygen index of polyacrylonitrile is only 17%, which is a flammable fiber, and it will release toxic cyanide during combustion, which limits its application to a certain extent. [0003] In recent years, the study of high heat resistance graphene and graphene derivative flame retardant polymer materials to improve the fire performance of materials has become a research hotspot. As an import...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/12C08K9/04C08K9/02C08K3/04C08L33/20D01F1/07D01F6/54
CPCC08K9/02C08K9/04C08K9/12C08K2201/011C08L2201/02C08L2203/12C08K3/042D01F1/07D01F6/54C08L33/20
Inventor 付少海仇明慧王冬李敏张丽萍刘明明田安丽
Owner JIANGNAN UNIV
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