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Glycine-modified graphene oxide, polyvinyl alcohol halogen-free flame-retarding material and preparation method thereof

A technology of glycine and polyvinyl alcohol, applied in the field of polyvinyl alcohol flame retardant materials, can solve the problems of limited flame retardant effect, easy agglomeration by adding LDH, and achieve the effect of good flame retardant effect, good application prospect and avoiding agglomeration.

Inactive Publication Date: 2016-07-06
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of glycine-modified graphene oxide, which can be applied to polyvinyl alcohol flame-retardant materials, and solve the problem that adding a single graphene oxide flame-retardant effect in existing polyvinyl alcohol materials is limited, while LDH The technical issue of joining the ease of reunion

Method used

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  • Glycine-modified graphene oxide, polyvinyl alcohol halogen-free flame-retarding material and preparation method thereof
  • Glycine-modified graphene oxide, polyvinyl alcohol halogen-free flame-retarding material and preparation method thereof

Examples

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Embodiment 1

[0033] The glycine-modified graphene oxide provided in this embodiment is prepared by the following steps:

[0034] 1) Add 0.5g of graphite oxide obtained by the Hummers method into 300mL of water, and ultrasonically disperse for 30min to obtain a graphene oxide dispersion; dissolve 1.5g of glycine in 200mL of water to obtain a glycine solution;

[0035] 2) Add the aminoacetic acid solution obtained in step 1) dropwise to the graphene oxide dispersion obtained in step 1), and under magnetic stirring, heat up to 90° C. for 8 hours to obtain the glycine modified graphene oxide dispersion; use a pore size of Suction filtration with 0.22 μm cellulose filter membrane to remove unreacted aminoacetic acid, separate and obtain purified glycine-modified graphite filter cake, and dry to obtain.

[0036] The infrared spectrogram of the glycine-modified graphene oxide (Glycine-RGO) prepared by the present embodiment is as follows figure 1 As shown, GO is the infrared spectrum of graphene...

Embodiment 2

[0042] The glycine-modified graphene oxide provided in this embodiment is prepared by the following steps:

[0043] 1) Add 2g of graphite oxide obtained by the Hummers method into 500mL of water, and ultrasonically disperse for 30min to obtain a graphene oxide dispersion; dissolve 10g of glycine in 500mL of water to obtain a glycine solution;

[0044] 2) Add the aminoacetic acid solution obtained in step 1) dropwise to the graphene oxide dispersion obtained in step 1), and raise the temperature to 95° C. for 10 h under magnetic stirring to obtain the glycine-modified graphene oxide dispersion; use high-speed centrifugation Centrifuge at 8000rpm for 30min to remove unreacted aminoacetic acid, separate and obtain slurry, and dry to obtain.

[0045] The polyvinyl alcohol halogen-free flame-retardant material of the glycine-modified graphene oxide provided in this embodiment is composed of polyvinyl alcohol, glycine-modified graphene oxide and magnesium-aluminum layered double hyd...

Embodiment 3

[0050] The glycine-modified graphene oxide provided in this embodiment is prepared by the following steps:

[0051] 1) Add 2g of graphite oxide obtained by the Hummers method into 500mL of water, and ultrasonically disperse for 30min to obtain a graphene oxide dispersion; dissolve 10g of glycine in 500mL of water to obtain a glycine solution;

[0052] 2) Add the aminoacetic acid solution obtained in step 1) dropwise to the graphene oxide dispersion obtained in step 1), and under magnetic stirring, heat up to 95° C. for 10 h to obtain the glycine-modified graphene oxide dispersion; use a pore size of Suction filtration with 0.22 μm cellulose filter membrane to remove unreacted aminoacetic acid, separate and obtain purified glycine-modified graphite filter cake, and dry to obtain.

[0053] The polyvinyl alcohol halogen-free flame-retardant material of the glycine-modified graphene oxide provided in this embodiment is composed of polyvinyl alcohol, glycine-modified graphene oxide...

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Abstract

The invention discloses glycine-modified graphene oxide, a polyvinyl alcohol halogen-free flame-retarding material and a preparation method thereof. The glycine-modified graphene oxide is prepared through the following steps: 1) adding the graphene oxide to water with ultrasonic dispersion to prepare a graphene oxide dispersed liquid; and 2) performing a reaction to a glycine solution and the graphene oxide dispersed liquid at 90-95 DEG C for 8-12 h, and separating and drying a reaction product, wherein the mass ratio of the glycine to the graphene oxide is 1-5:1. The glycine is grafted to the lamella of the graphene oxide, on the other hand, the graphene oxide lamella has certain air insulation and flame-retarding property, and on the other hand, an electronegative carboxyl group can be used for targeted induction of MgAl-LDH lamella, thereby uniformly dispersing the MgAl-LDH. The method achieves a cooperative flame-retarding effect between graphene and the MgAl-LDH and improves the flame-retarding effect of a PVA substrate.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl alcohol flame retardant materials, and in particular relates to a graphene oxide modified with aminoacetic acid, and also relates to a polyvinyl alcohol halogen-free flame retardant material using the above glycine modified graphene oxide and its Preparation. Background technique [0002] Polyvinyl alcohol (PVA) is a non-toxic, non-irritating high polymer with excellent film-forming properties, mechanical strength and transparency, and has important applications in packaging, medicine and food industries. However, due to the strong flammability of polyvinyl alcohol, its application range is greatly limited. It is of great significance to obtain polyvinyl alcohol flame-retardant materials by modification methods. [0003] Halogen-containing flame retardants have the characteristics of convenient addition and good flame-retardant effect, but they do not meet the development trend of environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K9/04C08K3/04C08K3/22
Inventor 刘红宇赫玉欣罗洁郑英丽杜锦屏刘继纯
Owner HENAN UNIV OF SCI & TECH
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