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A kind of modified graphene oxide and preparation method thereof

A technology of graphite oxide and graphene, applied in chemical instruments and methods, rayon manufacturing, chemical characteristics of fibers, etc., can solve the problem that the number of amine groups cannot be accurately quantified, and achieve the effect of reducing cross-linking and increasing lamellar spacing.

Active Publication Date: 2021-10-22
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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  • A kind of modified graphene oxide and preparation method thereof
  • A kind of modified graphene oxide and preparation method thereof
  • A kind of 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 parts, polyamine 10 parts, the mixture that is made up of polyisocyanate and monoisocyanate 20 parts, solvent 1000 parts, wherein , the molar ratio of the isocyanate in the polyisocyanate 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 isocy...

Embodiment 2

[0025] Embodiment 2, a kind of modified graphene oxide, is made by the raw material of following weight ratio, graphene oxide 10 parts, polyamine 50 parts, the mixture that is made up of polyisocyanate and monoisocyanate 200 parts, solvent 2000 parts, wherein , the mol ratio of the isocyanate in the polyisocyanate to the isocyanate in the monoisocyanate is 2.5, the -NCO group in the isocyanate mixture and the -NH in the polyamine The mol ratio of the group 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 wa...

Embodiment 3

[0027] Embodiment 3, a kind of modified graphene oxide, is made by the raw material of following weight ratio, graphene oxide 10 parts, polyamine 25 parts, the mixture that is made up of polyisocyanate and monoisocyanate 100 parts, solvent 500 parts, wherein , the -NCO group in the isocyanate mixture and the -NH in the polyamine The mol ratio of the group is 1.00, and the mol 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...

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Abstract

A modified graphene oxide and a preparation method thereof, which are prepared from the following raw materials in weight proportions: 10 parts of graphene oxide, 10-50 parts of polyamine, 20-200 parts of a mixture of polyisocyanate and monoisocyanate, and a solvent 500‑2000 parts; dissolve and disperse graphene oxide in a solvent to prepare a dispersion liquid, add polyamine to the dispersion liquid, raise the temperature to 90°C-120°C after adding, and perform reduction modification on graphene oxide , after reacting for 4h-48h, adjust the temperature to 50°C-100°C, add the mixture of polyisocyanate and monoisocyanate, react for 4h-48h, and obtain the modified dispersion liquid. The present invention utilizes the principle of reducing graphene oxide by amine group, and polyamines modify and reduce graphene oxide in a solvent; add a mixture of polyisocyanate and monoisocyanate to block the amine group, and eliminate the amine group for spandex chain extension , and further increase the interlayer spacing, greatly reducing the crosslinking between graphene sheets.

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 Patents(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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