Crosslinking poly(organophosphazenes) microsphere and preparation method thereof

A technology for cross-linking polyphosphazene and microspheres, which is applied in chemical instruments and methods, catalyst carriers, physical/chemical process catalysts, etc. It can solve the problems that polyphosphazene microspheres have not been reported, achieve good thermal stability and simple process Effect

Inactive Publication Date: 2007-02-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, a large number of linear, grafted and cross-linked polyphosphazene materials have been synthesized, while cross-linked polyphosphazene microspheres have not been reported so far

Method used

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  • Crosslinking poly(organophosphazenes) microsphere and preparation method thereof
  • Crosslinking poly(organophosphazenes) microsphere and preparation method thereof
  • Crosslinking poly(organophosphazenes) microsphere and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Add 0.1 gram (0.29 mmol) hexachlorocyclotriphosphazene, 0.22 gram (0.86 mmol) 4,4'-dihydroxydiphenyl sulfone and 0.17 gram (1.73 mmol) triethylamine in 150 milliliter flask, again Add 90 ml of acetone, stir to dissolve, and react under magnetic stirring for 2 hours at 25°C. After the reaction, the solid is centrifuged, and the crude product is washed three times with acetone, then three times with deionized water, and finally placed in a vacuum oven After drying for 24 hours, 0.52 g of cross-linked polyphosphazene microspheres was obtained, with a yield of 47% based on hexachlorocyclotriphosphazene.

[0022] figure 1 It is the transmission electron micrograph of the obtained cross-linked polyphosphazene microspheres, figure 2 Scanning electron micrographs of cross-linked polyphosphazene microspheres, image 3 It is a field emission scanning electron micrograph of the cross-linked polyphosphazene microsphere, and it can be seen from the photograph that the diameter of...

Embodiment 2

[0028] Add 1 gram (2.9 mmoles) of hexachlorocyclotriphosphazene, 2.2 grams (8.6 mmoles) of 4,4'-dihydroxydiphenyl sulfone and 34 grams (346 mmoles) of triethylamine in a 500 ml flask, and then Add 250 ml of acetone, stir to dissolve, and react under magnetic stirring for 1 hour at 25°C. After the reaction, the solid is centrifuged, and the crude product is washed three times with acetone, then three times with deionized water, and finally placed in a vacuum oven After drying for 24 hours, 1.17 g of cross-linked polyphosphazene microspheres were obtained, with a yield of 64% based on hexachlorocyclotriphosphazene. Electron microscope photos show that the diameter of the microspheres is 0.4-4.5 microns, and the surface of the microspheres is flat and solid. Spectral analysis shows that the structure is a cross-linked condensation structure of hexachlorocyclotriphosphazene and 4,4'-dihydroxydiphenylsulfone .

Embodiment 3

[0030] The equipment and preparation process described in Example 1 were adopted, except that the reaction temperature was carried out at the reflux temperature of acetone, and the yield based on hexachlorocyclotriphosphazene was 55%. The analysis of the experimental results shows that the diameter of the microsphere is 0.5-4.5 microns, the surface of the microsphere is flat and solid, and its structure is a cross-linked condensation structure of hexachlorocyclotriphosphazene and 4,4'-dihydroxydiphenylsulfone.

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Abstract

the invention discloses a crosslinking polyphosphine-nitrile microball and preparing method, which is characterized by the following: the diameter is 0.4-5 um ; the chemical structural formula is displayed on the right; the microball surface is flat solid structure, which adopts hexachloride cycotrinitrilephosphine and 4, 4'-dihydroxy diphenyl sulfone to crosslink and condense under the action of trimethylamine.

Description

Technical field: [0001] The invention relates to a polymer microsphere and a preparation method thereof, in particular to a cross-linked polyphosphazene microsphere and a preparation method thereof. Background technique: [0002] Polymer microsphere materials are widely used, such as plastic additives, coatings, adhesives, building materials, etc. (Document 1. J. Forcada et al., Curr. Org. Chem. 9, 1067, (2005)). In recent years, polymer microsphere materials with diameters ranging from submicron to several microns have shown applications in high-end technical fields, such as membrane materials, drug delivery controlled release systems, microreactors, microseparators, spacer materials for liquid crystal displays , chromatographic column packing material etc. (document 2.H.Fudouz et al., Adv.Mater.15,892, (2003); 3.C.F.Wilson et al., Anal.Chem.74,5099, (2002); 4. T. Kim et al., Biomaterials 27, 152, (2006)). Among them, the highly cross-linked polymer microsphere material h...

Claims

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Application Information

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IPC IPC(8): C08G79/02A61K47/34B01J32/00C09K21/14C08G79/025
Inventor 朱路唐小真朱䶮
Owner SHANGHAI JIAO TONG UNIV
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