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Modified graphene oxide and preparation method thereof

A technology of stone oxide and graphene, applied in chemical instruments and methods, rayon manufacturing, fiber chemical characteristics, etc., can solve the problem that the number of amine groups cannot be accurately quantified, and achieve the effect of reducing crosslinking and increasing the interlayer spacing

Active Publication Date: 2020-08-04
LIANYUNGANG DUZHONG NEW AOSHEN SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for spandex, the number of amine groups of chain-extending amines and terminating amines and the addition process need to be precisely controlled during the polymerization process. The amine groups of polyamines and monoamines in the modification solution in the above amine group modification scheme cannot be accurately quantified. , which brings great difficulties to the subsequent in situ polymerization

Method used

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  • Modified graphene oxide and preparation method thereof
  • Modified graphene oxide and preparation method thereof
  • Modified graphene oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, a kind of modified graphene oxide, is made by the raw material of following weight ratio, graphene oxide 10, polyamine 10, the mixture 20 that is made up of polyisocyanate and monoisocyanate, solvent 1000, wherein, in polyisocyanate The molar ratio of the isocyanate in the isocyanate to the isocyanate in the monoisocyanate is 0.5, and the molar ratio of the -NCO group in the isocyanate mixture to the -NH2 group in the polyamine is 1;

[0020] The polyamine is selected from one or more of ethylenediamine, propylenediamine, pentamethylenediamine and diethylenetriamine;

[0021] The polyisocyanate is selected from 4,4-diphenylmethane diisocyanate, 2,4-diphenylmethane diisocyanate, toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, 1,4- One or more of phenylene diisocyanate, 1,3-benzene diisocyanate, and hexamethylene diisocyanate;

[0022] The monoisocyanate is selected from one or more of phenyl isocyanate, p-toluene isocyanate, m-to...

Embodiment 2

[0025] Embodiment 2, a kind of modified graphene oxide, is made by the raw material of following weight ratio, graphene oxide 10, polyamine 50, the mixture 200 that is made up of polyisocyanate and monoisocyanate, solvent 2000, wherein, in polyisocyanate The molar ratio of the isocyanate in the isocyanate and the isocyanate in the monoisocyanate is 2.5, and the molar ratio of the -NCO group in the isocyanate mixture to the -NH2 group in the polyamine is 1.25; the selection of each raw material is the same as in Example 1.

[0026] The preparation method is as follows: dissolving and dispersing graphene oxide in a solvent to obtain a dispersion liquid, adding polyamine to the dispersion liquid, raising the temperature to 120°C after adding, performing reduction modification reaction on graphene oxide, and reacting After 48 hours, the temperature was adjusted to 100°C, and a mixture of polyisocyanate and monoisocyanate was added. After 48 hours of reaction, the product was washed...

Embodiment 3

[0027] Example 3, a modified graphene oxide, prepared from the following raw materials in weight ratio, graphene oxide 10, polyamine 25, a mixture of polyisocyanate and monoisocyanate 100, solvent 500, wherein, in the isocyanate mixture The molar ratio of the -NCO group to the -NH2 group in the polyamine is 1.00, and the molar ratio of the isocyanate in the polyisocyanate to the isocyanate in the monoisocyanate is 4.80; the selection of each raw material is the same as in Example 1.

[0028] The preparation method is as follows: dissolving and dispersing graphene oxide in a solvent to obtain a dispersion liquid, adding polyamine to the dispersion liquid, raising the temperature to 100°C after adding, performing reduction modification reaction on graphene oxide, and reacting After 25 hours, the temperature was adjusted to 70°C, and a mixture of polyisocyanate and monoisocyanate was added. After 24 hours of reaction, the product was washed with acetone, centrifuged, and dried to ...

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Abstract

The invention discloses modified graphene oxide and a preparation method thereof. The modified graphene oxide is prepared from, by weight, 10 parts of graphene oxide, 10-50 parts of polyamine, 20-200parts of a mixture composed of polyisocyanate and monoisocyanate and 500-2000 parts of a solvent by dissolving and dispersing the graphene oxide in the solvent for preparing a dispersion liquid, adding the polyamine into the dispersion liquid, raising the temperature to 90-120 DEG C after the polyamine is added, carrying out reduction modification on the graphene oxide, reacting for 4-48 hours, adjusting the temperature to 50-100 DEG C, adding the mixture of polyisocyanate and monoisocyanate, and reacting for 4-48 hours to obtain a modified dispersion liquid. According to the preparation method, the principle that the graphene oxide is reduced by amido is utilized, and the graphene oxide is modified and reduced by the polyamine in the solvent, the mixture of polyisocyanate and monoisocyanate is added to terminate the amido, so that the influence of the amido on spandex chain extension is eliminated, the interlayer spacing of lamellas is further increased, and the crosslinking between the graphene lamellas is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of textiles, and relates to a modified graphene oxide and a preparation method thereof. Background technique [0002] Graphene is a benzene ring structure material in which carbon atoms are closely arranged in two-dimensional space. It is a new carbon allotrope following zero-dimensional football ene, one-dimensional carbon nanotubes, three-dimensional graphite and diamond. It has Excellent electrical, magnetic, thermal and mechanical properties. In the field of fibers, graphene is often used to modify fibers and expand the functions of fibers, such as antibacterial properties, far-infrared functions, and electrical conductivity. However, there are some problems in the application of graphene. For example, graphene is composed of benzene six-membered rings containing stable bonds, has high chemical stability, an inert surface, and weak interaction with other media, and there are The strong intermolecular f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/44C09C3/08C09C3/04D01F1/10D01F1/09
CPCC09C1/44C09C3/006C09C3/04C09C3/043C09C3/08D01F1/09D01F1/10D01F1/103
Inventor 王建伟孙振波李春花马娟娟刘霖蒋叶群祁倩万绍丽高久林周苏阳
Owner LIANYUNGANG DUZHONG NEW AOSHEN SPANDEX
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