Multi-responsive ion gel based on super amphiphile and its preparation method
An ion gel and amphiphilic molecule technology, applied in the field of ion gel preparation, can solve the problems of complex synthesis process and preparation method, unsuitable for mass use, and high cost of ionic liquid
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Embodiment 1
[0054] Weigh 1.115g of tert-butyl acrylate, 0.438g of isopropylacrylamide, and 1g of polyethylene glycol dodecyl trithiocarbonate as a macromolecular chain transfer agent in a 25ml reaction bottle, and use 6ml of 1, 4-dioxane was dissolved, and liquid nitrogen freezing-vacuumizing-nitrogen filling and thawing cycled three times to remove the oxygen in the reaction bottle, and then added 0.002g of azobisisobutyronitrile in an oil bath at 70°C to initiate a reversible reaction. Fractured chain addition reaction, after reacting for 12 hours, the crude product was dissolved in dichloromethane and then precipitated in cold ether for 3 times to obtain a pure solid product intermediate tri-block copolymer. The product was dissolved in CDCl 3 The H NMR spectrum in figure 1 As shown: 1 H NMR (CDCl 3 ,TMS) δ(ppm)0.88(t,6H), 1.15(d,223H), 1.46(s,758H), 2.26(m,89H), 2.75(m,67), 3.4-3.8 (m,1818) , 4.05(s,37H). Depend on figure 1 You can clearly see the super strong polyethylene glycol...
Embodiment 2
[0062] Weigh 0.991g of tert-butyl acrylate, 0.525g of isopropylacrylamide, and 1g of polyethylene glycol dodecyl trithiocarbonate as a macromolecular chain transfer agent in a 25ml reaction bottle, and use 6ml of 1, After 4-dioxane was dissolved, liquid nitrogen freezing-vacuumizing-nitrogen filling and thawing cycled three times to remove the oxygen in the reaction flask, in a 70°C oil bath, under the trigger of 0.002g of azobisisobutyronitrile, a reversible Fractured chain addition reaction, after 12 hours of reaction, the crude product was dissolved in dichloromethane and then precipitated in cold ether for 3 times to obtain a purified solid product which was changed to an intermediate tri-block copolymer. The H NMR spectrum of the product is image 3 , after dissolving the above product in dichloromethane, add 3.3g trifluoroacetic acid to dissolve it under ice-water bath, after hydrolysis for 2 days, dissolve the crude product in dichloromethane and precipitate in cold eth...
Embodiment 3
[0064] Weigh 1.362g of tert-butyl acrylate, 0.438g of isopropylacrylamide, and 1g of polyethylene glycol dodecyl trithiocarbonate as a macromolecular chain transfer agent in a 25ml reaction bottle, and use 8ml of 1, After 4-dioxane was dissolved, liquid nitrogen freezing-vacuumizing-nitrogen filling and thawing cycled three times to remove the oxygen in the reaction flask, in a 70°C oil bath, under the trigger of 0.002g of azobisisobutyronitrile, a reversible Fractured chain addition reaction, after 12 hours of reaction, the crude product was dissolved in dichloromethane and then precipitated in cold ether for 3 times to obtain a purified solid product which was changed to an intermediate tri-block copolymer. The H NMR spectrum of the product is Figure 5 , after dissolving the above product with dichloromethane, add 4.5g trifluoroacetic acid to dissolve it under ice-water bath. After 2 days of hydrolysis, dissolve the crude product with dichloromethane and precipitate it in c...
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