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A kind of preparation method of modified nano material

A nano-material and modification technology, applied in the field of polymer functional materials, can solve the problems of limited applicable materials and complicated operation of grafting modification on the surface of nano-materials, and achieve a wide application range, good grafting efficiency, and easy preparation Effect

Active Publication Date: 2020-01-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the above defects or improvement needs of the prior art, the object of the present invention is to provide a preparation method of modified nanomaterials, wherein the key overall process flow is set, and the reaction conditions and parameters of each step (such as reaction raw materials type and proportion, reaction time and temperature, etc.) are improved, and compared with the prior art, it can effectively solve the problems of complex graft modification operation on the surface of nanomaterials and limited applicable materials. The dispersoid is mixed into the reaction system of the dispersion liquid of nanomaterials with active groups on the surface, and polyether, polyamide or polyester compounds can be grafted on the surface of nanomaterials through one-step reaction to obtain modified nanomaterials with good dispersibility. material; and the preparation method of the modified nanomaterial of the present invention has a wide range of applications, and is suitable for a variety of nanomaterials with active groups on the surface or with active groups on the surface after pretreatment, and various cationic ring-opening polymerizations Reactive Heteroatom-Containing Cyclic Small Molecule Compounds

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  • A kind of preparation method of modified nano material
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  • A kind of preparation method of modified nano material

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preparation example Construction

[0032] The preparation method of a modified nano-material provided by the present invention comprises grafting polyether, polyamide or polyester compound on the surface of the nano-material through cationic ring-opening polymerization, and the nano-material has active groups on its surface Or nanomaterials with active groups on the surface after pretreatment.

[0033] The preparation method of the modified nanomaterial specifically comprises the following steps:

[0034] S1: Add nanomaterials with active groups on their surface or pretreated surface with active groups into an organic solvent, and mix uniformly to prepare a nanomaterial / organic solvent dispersion; the nanomaterial / organic The concentration of solvent dispersion is 0.1mg / ml~10mg / ml;

[0035] S2: Add the heteroatom-containing cyclic small molecule compound and the cationic initiator into the organic solvent, and the molar ratio of the heteroatom-containing cyclic small molecule compound to the cationic initiator...

Embodiment 1

[0051] A method for preparing a modified nanomaterial, wherein a polyether compound is grafted on the surface of a nanomaterial through cationic ring-opening polymerization, and the nanomaterial has an active group on its surface or has an active group on the surface after pretreatment group of nanomaterials.

[0052] The cationic initiator of the cationic ring-opening polymerization reaction is CF 3 SO 3 OCH 3 , the heteroatom-containing cyclic small molecule compound is tetrahydrofuran, the polyether compound is polytetrahydrofuran, and the nanomaterial is a reduced graphene oxide nanosheet whose surface is non-covalently modified with pyrenemethanol, and the active group is -OH.

[0053] The preparation method of the modified nanomaterial specifically comprises the following steps:

[0054] S1: Add the reduced graphene oxide nanosheets whose surface is non-covalently modified with pyrenemethanol into dichloromethane, and mix uniformly to obtain a reduced graphene oxide ...

Embodiment 2

[0062] A method for preparing a modified nanomaterial, wherein a polyether compound is grafted on the surface of a nanomaterial through cationic ring-opening polymerization, and the nanomaterial has an active group on its surface or has an active group on the surface after pretreatment group of nanomaterials.

[0063] The cationic initiator of the cationic ring-opening polymerization reaction is CF 3 SO 3 OCH 3 , the heteroatom-containing cyclic small molecule compound is tetrahydrofuran, the polyether compound is polytetrahydrofuran, and the nanomaterial is a reduced graphene oxide nanosheet whose surface is non-covalently modified with pyrenemethanol, and the active group is -OH.

[0064] The preparation method of the modified nanomaterial specifically comprises the following steps:

[0065] S1: The reduced graphene oxide nanosheets whose surface is non-covalently modified with pyrenemethanol are added to chloroform, and mixed uniformly to obtain a reduced graphene oxide...

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Abstract

The invention discloses a preparation method of a modified nano-material. The method comprises the following steps: a polymer obtained by a cationic ring-opening polymerization is grafted to the surface of an initial nano-material, and the modified nano-material is obtained; wherein the initial nano-material is a nano-material with active groups on the surface or a nano-material with active groupson the surface after pretreatment; the polymer is at least one of a polyether compound, a polyamide compound and a polyester compound. Key integral process flow arrangement, reaction conditions and parameters of each step (such as kinds and proportioning of reaction raw materials, reaction time and temperature, and the like) are modified, and compared with the prior art, the problems that nano-material surface graft modification operation is complex, and application materials are limited are effectively solved.

Description

technical field [0001] The invention belongs to the field of polymer functional materials, and more specifically relates to a preparation method of modified nanomaterials, especially suitable for grafting polymers on the surface of nanomaterials. Background technique [0002] The functionalization and high performance of polymer materials are the future development direction, and adding nanomaterials to them is a simple and effective method. The characteristics of large specific surface area, easy agglomeration and poor compatibility with most polymers make it difficult for nanomaterials to give full play to their own advantages. Surface modification is an inevitable choice to prevent self-agglomeration and improve the uniformity of its dispersion in the polymer matrix. Among them, grafting polymers on the surface of nanomaterials is a very important chemical modification method. [0003] In recent years, aliphatic polyesters, polyamides, and polyethers have attracted much ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
CPCC08G83/001
Inventor 叶昀昇邓宁心李卓伦解孝林周兴平
Owner HUAZHONG UNIV OF SCI & TECH