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A method for preparing fluorescent nanofibers based on photografting surface modification

A surface modification and nanofiber technology, applied in the direction of fiber type, fiber treatment, chemical instruments and methods, etc., can solve the problem of low fluorescence activity, and achieve the effect of simple preparation process, strong repeatability and simple operation

Inactive Publication Date: 2015-12-30
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the defects of low fluorescent activity of doped fibers prepared by traditional blend spinning method, the present invention adopts photopolymerization grafting technology to graft europium ion organic ligands on the surface of electrospun fibers

Method used

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  • A method for preparing fluorescent nanofibers based on photografting surface modification

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Experimental program
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Effect test

Embodiment 1

[0020] 1) Dissolve 7.2g (0.1mol) of acrylic acid and 22.4g (0.1mol) of dibenzoylmethane in 100ml of DMF in a 250ml four-necked flask, and adjust the pH value within the range of 6-7. Dissolve 16.8g (0.05mol) of europium nitrate in 100ml of DMF, and slowly add it dropwise into a four-neck flask, control the temperature at 40°C, and complete the dropwise addition in 30 minutes; after the dropwise addition, keep the temperature at 60°C for 48h. Precipitate with ethanol as a precipitant, filter the precipitate, wash with distilled water and ethanol, and dry in vacuum at a constant temperature to obtain an organic complex europium ion fluorescent material;

[0021] 2) Prepare a DMF solution of 10wt% PAN, dissolve 1-hydroxycyclohexyl phenyl ketone (184) in the DMF solution of PAN, and adjust suitable electrospinning spinning conditions to prepare photosensitive nanofibers;

[0022] 3) Dissolve 3 g of the europium ion fluorescent ligand prepared in step 1) in 10 ml of chloroform, and...

Embodiment 2

[0024] 1) Dissolve 3.6g (0.05mol) of acrylic acid and 33.6g (0.15mol) of dibenzoylmethane in 100ml of DMF in a 250ml four-necked flask, and adjust the pH value within the range of 6-7. Dissolve 16.8g (0.05mol) of europium nitrate in 100ml of DMF, and slowly add it dropwise into a four-neck flask, control the temperature at 40°C, and complete the dropwise addition in 30 minutes; after the dropwise addition, keep the temperature at 60°C for 48h. Precipitate with ethanol as a precipitant, filter the precipitate, wash with distilled water and ethanol, and dry in vacuum at a constant temperature to obtain an organic complex europium ion fluorescent material;

[0025] 2) Prepare a DMF solution of 10wt% PAN, dissolve 2-hydroxy-2-methyl-phenylacetone-1 (1173) in the DMF solution of PAN, and adjust the appropriate electrospinning spinning conditions to prepare photosensitive nanofibers;

[0026] 3) Dissolve 4 g of the europium ion fluorescent ligand prepared in step 1) in 10 ml of chlo...

Embodiment 3

[0028] 1) Dissolve 7.2g (0.1mol) of acrylic acid and 22.4g (0.1mol) of dibenzoylmethane in 100ml of DMF in a 250ml four-necked flask, and adjust the pH value within the range of 6-7. Dissolve 33.6g (0.1mol) of europium nitrate in 100ml of DMF, and slowly drop it into a four-neck flask, control the temperature at 40°C, and complete the dropwise addition in 30 minutes; after the dropwise addition, keep the temperature at 60°C for 48h. Precipitate with ethanol as a precipitant, filter the precipitate, wash with distilled water and ethanol, and dry in vacuum at a constant temperature to obtain an organic complex europium ion fluorescent material;

[0029] 2) Prepare a DMF solution of 10wt% PAN, dissolve 2-methyl-1-(4-methylmercaptophenyl)-2-morphineacetone-1 (907) in the DMF solution of PAN, and adjust the electrospinning spinning Preparation of photosensitive nanofibers under silk conditions;

[0030] 3) Dissolve 5 g of the europium ion fluorescent ligand prepared in step 1) in ...

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Abstract

The invention relates to a method for preparing fluorescent nanofibers based on photo-grafting surface modification. The method comprises the following steps: performing blending electrospining on a photoinitiator with light-sensitive activity and a high polymer, and preparing the nanofiber with light-sensitive activity; enabling europium ion, acrylic acid and dibenzoyl methane to react to form a polymerizable rare earth organic ligand; finally, immersing the light-sensitive nanofibers in an europium ion ligand solution, grafting the europium ion ligand to the surface of the nanofiber through a photo-polymerization grafting method, and preparing to obtain the nanofibers with fluorescence properties. The prepared nanofibers have extremely large specific surface area, and fluorescent ligands are enriched on the surfaces of the nanofibers, so the nanofibers have high fluorescence activity. The prepared nanofibers have high application values in the field of preparation of light-sensitive materials or optical sensors.

Description

technical field [0001] The invention relates to a nano-scale macromolecular composite fiber with fluorescent properties prepared by ultraviolet light surface modification, belonging to the field of functionalized fiber preparation. technical background [0002] Nanofibers have a high specific surface area, and high-performance composite fibers can be obtained through surface functional modification. At present, polymer nanofibers play an important role in new electronic technology fields, optoelectronic materials and other fields due to their continuous fiber structure and high specific surface area. Electrospinning technology is an efficient top-down preparation of polymer solution spinning technology with fiber diameter distribution between 100nm and 1000nm. In recent years, the development of electrospinning technology has shown that it has the characteristics of universality and flexibility in the preparation of composite polymer fibers: electrospinning technology is wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M14/28C09K11/06D06M101/28
Inventor 马贵平方大为聂俊
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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