Highly cross-linked polyphosphazene hollow microspheres as well as preparation method thereof

A technology of hollow microspheres and polyphosphazene, which is applied in the field of polyphosphazene hollow microspheres and its preparation, can solve the problems of heating, the specific surface area of ​​microspheres is difficult to meet the needs of industrial adsorption, and the high requirements of the preparation process, and achieve excellent solvent resistance , The preparation process is simple and easy, and the method is novel

Active Publication Date: 2014-02-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​the microspheres obtained by this technology vegetation is difficult to meet the needs of in

Method used

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  • Highly cross-linked polyphosphazene hollow microspheres as well as preparation method thereof
  • Highly cross-linked polyphosphazene hollow microspheres as well as preparation method thereof
  • Highly cross-linked polyphosphazene hollow microspheres as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Add 0.2088 g of hexachlorocyclotriphosphazene, 0.8352 g of 4,4-dimercaptobisthiophenol, and 0.5 mL of triethylamine into a 150 mL flask, and dissolve in 100 mL of acetonitrile. Under mechanical stirring, react at room temperature for 1 hour, then centrifuge the precipitate, wash with tetrahydrofuran and deionized water three times, and finally dry in a vacuum oven for 24 hours to obtain cross-linked polyphosphazene hollow microspheres.

[0031] figure 1 , figure 2 The low-magnification and high-magnification scanning electron microscope pictures of the obtained polyphosphazene hollow microspheres are respectively. image 3 It is a transmission electron microscope picture of the obtained polyphosphazene hollow microspheres. Both indicate that the obtained microspheres are hollow structures.

[0032] Figure 4 It is the infrared spectrum of cross-linked polyphosphazene hollow microspheres. Wherein a is polyphosphazene, and b is 4,4-dimercaptobist...

Example Embodiment

[0034] Example 2

[0035] Add 0.2088 g of hexachlorocyclotriphosphazene, 0.8352 g of 4,4-dimercaptobisthiol, and 0.5 mL of triethylamine into a 150 mL flask, and dissolve in 100 mL of acetone. Under mechanical stirring, react at room temperature for 2 hours, then centrifuge the precipitate, wash three times with tetrahydrofuran and deionized water, and finally dry in a vacuum oven for 24 hours to obtain cross-linked polyphosphazene hollow microspheres.

Example Embodiment

[0036] Example 3

[0037] Add 0.2088 g of hexachlorocyclotriphosphazene (one part), 0.8352 g of 4,4-dimercaptobisthiophenol (two parts), and 0.5 mL of triethylamine into a 150 mL flask, and dissolve with 50 mL of acetone. Under the action of ultrasound, react at room temperature for 2 hours, then centrifuge the precipitate, wash with tetrahydrofuran and deionized water three times, and finally dry in a vacuum oven for 24 hours to obtain cross-linked polyphosphazene hollow microspheres.

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Abstract

The invention relates to highly cross-linked polyphosphazene hollow microspheres as well as a preparation method thereof, belonging to the technical field of organic micro-nanometer materials. The preparation method comprises the following steps: dissolving 4, 4-disulfydryl dithiophenol, phosphonitrilic chloride trimer and an acid-binding agent in an organic solvent for reaction; and after reaction, carrying out centrifugal separation on a solid product and washing and drying the solid product to obtain the polyphosphazene hollow microspheres. The highly cross-linked polyphosphazene hollow microspheres provided by the invention are prepared by a one-pot method by means of self-assembly of the reactant to a reactive template while a cross-linking agent is introduced, so that the whole preparation method is convenient and concise to implement.

Description

technical field [0001] The invention relates to a method in the technical field of organic micro-nano materials, in particular to a polyphosphazene hollow microsphere with a crosslinking degree of more than 70% and a preparation method thereof. Background technique [0002] Due to their special physical and chemical properties, polymer hollow microspheres show great application prospects in many fields, such as drug loading, catalysis, dielectric materials, adsorbents, microreactors, etc. (Guo-Dong Fu, Guo Liang Li. Progress in Polymer Science, 2011;36:127-167). Among them, highly crosslinked polymer hollow microspheres have received special attention because of their excellent solvent resistance, thermal stability, and mechanical stability. At present, there are two main strategies for preparing crosslinked polymeric hollow microspheres. One is to add a small amount of cross-linking agent to the emulsion system capable of preparing polymer hollow microspheres, thereby pre...

Claims

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Application Information

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IPC IPC(8): C08G79/02C08L85/02C08G79/025
Inventor 黄小彬单聪聪常富强陈奎永唐小真
Owner SHANGHAI JIAO TONG UNIV
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