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.
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Example Embodiment
[0019] Example 1
[0020] This embodiment 1 is implemented under the following implementation conditions and technical requirements:
[0021] a Put 268g (2.0mol) trimethylolpropane and 236g (2.0mol) 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 reaction was pyrolyzed for 2 hours. Under reduced pressure, a colorless and transparent 3-ethyl-3-butoxane methanol liquid with a concentration of 96.8% was obtained.
[0022] b. In a four-necked flask equipped with an electromagnetic stirrer, thermometer, nitrogen inlet and addition funnel, pass nitrogen for 30 minutes to remove air in the reaction system. Add 7.096g (0.05mol) boron trifluoride ether BF3.0Et2 and 80ml dichloromethane into the flask, control the temperature of the system at 10℃, and add 11.62g (0.1mol) monomer 3-ethyl-3 within 5 minutes -Butoxane methanol was slowly added dropwise to the reaction system, maintaining the temperature, and react...
Example Embodiment
[0025] Example 2
[0026] This embodiment 2 is implemented under the following implementation conditions and technical requirements:
[0027] The implementation steps of a, b, c are the same as in Example 1.
[0028] d. Dissolve 0.5 g of amphiphilic hyperbranched polymer in 20 ml of dichloromethane to prepare a 25 mg / ml solution. The polymer solution was put into a dialysis bag (the molecular weight cut-off of the dialysis bag is 1000), and dialyzed in deionized water for 72 hours to obtain a solution containing self-assembly. The resulting micelles have a particle size of 15 nm. No phase separation occurs on the surface of the micelle.
Example Embodiment
[0029] Example 3
[0030] This embodiment 3 is implemented under the following implementation conditions and technical requirements:
[0031] a Put 268g (2.0mol) trimethylolpropane and 236g (2.0mol) diethyl carbonate into a 500ml single-neck 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. Distill under reduced pressure to obtain a colorless and transparent high-purity 3-ethyl-3-butoxane methanol liquid with a concentration of 97%.
[0032] b. In a four-necked flask equipped with an electromagnetic stirrer, thermometer, nitrogen inlet and addition funnel, pass nitrogen for 30 minutes to remove air in the reaction system. Add 7.096g (0.05mol) boron trifluoride ether BF3.0Et2 and 80ml chloroform into the flask, control the temperature of the system at 30℃, and add 11.62g (0.1mol) monomer 3-ethyl-3 within 5 minutes -Butoxane methanol was slowly added dropwise to the reaction system, maintaining the t...
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