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Method of preparing amphiphilic superbranched polyether nano-level self-assembly body

An amphiphilic hyperbranched, nano-scale technology, applied in the field of polymer technology preparation, can solve the problems of insufficient uniformity of micelles, large influence of the degree of phase separation, etc.

Inactive Publication Date: 2007-10-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the formed micelles are not uniform enough, and the PEO phase separation easily occurs on the surface of the micelles.
Moreover, the morphology of the micelles (such as: membranes, nanoparticles, etc.) and the molecular structure of the copolymer have a great influence on the degree of phase separation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment 1 is implemented under the following conditions of implementation and technical requirements:

[0021] a Add 268g (2.0mol) of trimethylolpropane and 236g (2.0mol) of diethyl carbonate into a 500ml single-necked flask, and reflux at 80°C for 3 hours. The temperature was raised to 180°C, and the pyrolysis reaction was carried out for 2 hours. Distilled under reduced pressure to obtain a colorless and transparent high-purity 3-ethyl-3-butoxanemethanol liquid liquid with a concentration of 96.8%.

[0022] b In a four-neck flask equipped with an electromagnetic stirrer, a thermometer, a nitrogen inlet and an addition funnel, first pass nitrogen for 30 minutes to remove the air in the reaction system. Add 7.096g (0.05mol) of boron trifluoride ether BF3.0Et2 and 80ml of dichloromethane into the flask, control the temperature of the system at 10°C, and dissolve 11.62g (0.1mol) of monomer 3-ethyl-3 within 5 minutes -Butoxanemethanol was slowly added dropwise in...

Embodiment 2

[0026] This embodiment 2 is implemented under the following conditions of implementation and technical requirements:

[0027] a, b, c implementation steps are the same as in Example 1.

[0028] d Dissolve 0.5 g of amphiphilic hyperbranched polymer in 20 ml of methylene chloride to form a 25 mg / ml solution. The polymer solution was put into a dialysis bag (the molecular weight cut-off of the dialysis bag was 1000), and dialyzed in deionized water for 72 hours to obtain a solution containing the self-assembled body. The obtained micelles had a particle size of 15 nm. Phase separation does not occur at the surface of the micelles.

Embodiment 3

[0030] This embodiment 3 is implemented under the following conditions of implementation and technical requirements:

[0031] a Add 268g (2.0mol) of trimethylolpropane and 236g (2.0mol) of diethyl carbonate into a 500ml single-necked flask, and reflux at 95°C for 3 hours. The temperature was raised to 200°C, and the pyrolysis reaction was carried out for 3.5 hours. Distilled under reduced pressure to obtain a colorless and transparent high-purity 3-ethyl-3-butoxanemethanol liquid liquid with a concentration of 97%.

[0032] b In a four-neck flask equipped with an electromagnetic stirrer, a thermometer, a nitrogen inlet and an addition funnel, first pass nitrogen for 30 minutes to remove the air in the reaction system. Add 7.096g (0.05mol) of boron trifluoride ether BF3.0Et2 and 80ml of chloroform into the flask, control the temperature of the system at 30°C, and dissolve 11.62g (0.1mol) of monomer 3-ethyl-3 within 5 minutes -Butoxanemethanol was slowly added dropwise into th...

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Abstract

The invention relates to a producing method of amphiphilic hyperbranched polyaether nano self-assemblies. The invention includes following steps: (1) preparing monomer 3-eshyl-3-oxacyclobutane carbinol; (2) processing a ring opening polymerization reaction; (3) adding ethylene oxide again for reaction, getting product, depositing by sedimentation agent, drying in vacuum to a constant weight; (4) distributing it in the water solution under the magnetic stirring, then dripping into the water solution or organic solvent for dialysis, obtaining amphiphilic hyperbranched polyaether nano self-assemblies. The inventive self-assemblies has an adjustable size between 10-200nm and stabilize in nano level. The nano micelle has an even size which avoids the PEO phase separation on the micelle surface.

Description

technical field [0001] The invention relates to a preparation method in the technical field of macromolecules, in particular to a preparation method of amphiphilic hyperbranched polyether nanoscale self-assembly. Background technique [0002] The self-assembly of polymer molecules is the process of spontaneously forming aggregates with special structures and shapes under the action of non-covalent forces such as hydrogen bonds, electrostatic interactions, hydrophilic-hydrophobic interactions, and van der Waals forces. Due to the strong designability of the molecular structure and the low critical micelle concentration of synthetic organic polymer molecules, their self-assembly has become one of the research topics that has attracted much attention in the field of nanoscience and technology. [0003] In recent decades, hyperbranched polymers have attracted extensive attention of researchers due to their unique structures and properties and simple preparation methods. Compare...

Claims

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Application Information

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IPC IPC(8): C08G65/04C08G65/331C08J3/03
Inventor 万锕俊寇玉霞李智敏张隐西
Owner SHANGHAI JIAO TONG UNIV
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