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Method for preparing aromatic diamine modified nano concavo-convex stick

A technology of nano attapulgite and aromatic diamine, which is applied in the field of surface modification of nano attapulgite, can solve the problems of low reaction efficiency and weak binding force, and achieves high graft reaction efficiency, improved colloidal stability and high thermal stability. Effect

Inactive Publication Date: 2009-04-08
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the surface modification of attapulgite is mainly carried out by coupling agent or ion exchange method, usually the reaction efficiency is low and the binding force is weak

Method used

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  • Method for preparing aromatic diamine modified nano concavo-convex stick
  • Method for preparing aromatic diamine modified nano concavo-convex stick
  • Method for preparing aromatic diamine modified nano concavo-convex stick

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: vacuum-dry the attapulgite nanorod at 140-160° C. for more than 12 hours. Disperse 5 g of the purified attapulgite in 75 g of anhydrous dimethylformamide, disperse in a high-shear emulsifier for 50-70 minutes, and ultrasonically disperse for 50-70 minutes to prepare a suspension of attapulgite. Get 2.502g 4,4'-diphenylmethane diisocyanate and dissolve in 20g anhydrous DMF, add gradually in the suspension of above-mentioned attapulgite clay under the condition of blowing nitrogen. The mixture was reacted under reflux under nitrogen protection for 1 h at 80°C. After the reaction was completed, the reaction intermediate was redispersed into 100 g of anhydrous dimethylformamide after centrifugal washing twice with anhydrous dimethylformamide. The suspension was heated to 55°C, and 4 g of 4,4'-diaminodiphenyl ether was added to the suspension. The reaction was stirred overnight under nitrogen protection. After the reaction, the mixed solution was centrifuged...

Embodiment 2

[0027] Example 2: Disperse 10 g of vacuum-dried nano-attapulgite in 70 g of anhydrous dimethylformamide, disperse with a high-shear emulsifier for 1 h, and disperse with ultrasonic for 1 h. Weigh 5.004 g of 4,4'-diphenylmethane Diisocyanate was dissolved in 20 g of anhydrous dimethylformamide, and gradually added to the attapulgite suspension under nitrogen protection. The resulting mixture was reacted at 80° C. under reflux under nitrogen protection for 1 h. After the reaction, anhydrous dimethylformamide was centrifuged and washed twice, and the reaction intermediate was redispersed in 100 g of anhydrous dimethylformamide. The suspension was heated to 60°C, and 16 g of 4,4'-diaminodiphenyl ether was added to the suspension. The reaction was stirred overnight under nitrogen protection. After the reaction, the mixture was centrifuged at 8000r / min, and washed once with anhydrous dimethylformamide, deionized water and acetone in sequence. The obtained aromatic diamine-modifie...

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Abstract

The invention discloses a method preparing for an aromatic diamine modifying nanometer concave-convex stick relating to a nanometer material technique field, which comprises the following steps: dispersing the nanometer concave-convex stick sufficiently in the quantitative solvent; adding the excess methyl diphenylene diisocyanate in the condition of the nitrogen protection and mixing; getting the nanometer concave-convex stick with the isocyanate group on the surface after the complement of the reaction; reacting between aromatic diamine and the concave-convex stick with the isocyanate group on the surface; washing sufficiently after the end of the reaction; getting aromatic diamine modifying nanometer concave-convex stick after drying. The invention improves the stability of the colloid in the organic solvent, which improves the organic content of the concave-convex stick; has a high property.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to the surface modification of nano attapulgite used for polymer nanocomposite materials. Background technique [0002] In recent years, with the development of nanotechnology, polymer nanocomposites have become a research hotspot. Usually adding a small amount of nanoparticles can greatly improve the thermal and mechanical properties of polymer materials. However, due to the large surface energy, nanoparticles are easy to aggregate into larger particles and have poor compatibility with the polymer matrix. Therefore, chemical modification of the surface of nanoparticles is the basis for preparing high-performance composite materials. [0003] Among various forms of nanomaterials, one-dimensional nanomaterials have attracted extensive attention because of their large specific surface area and high aspect ratio. Attapulgite is a natural rod-shaped clay particle, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/08C09C1/28C08L101/02
Inventor 安力卢红斌杨玉良
Owner FUDAN UNIV
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