pH-responsive regenerative aqueous two-phase system and application thereof
A system and water phase technology, applied in recycling technology, plastic recycling, etc., can solve the problems of slow phase formation time, unfavorable extraction of biologically active substances, restrictions on the industrial application of two aqueous phase systems, and expensive polymers, etc., to achieve easy industrialization Application, reduction in activity of biological substances, shortening of phase formation time
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Embodiment 1
[0022] pH-responsive regenerative polymer P ADB4.0 preparation
[0023] Add 120ml of deionized water to a 250ml Erlenmeyer flask with a stopper, then add 5ml of acrylic acid, 4.5ml of dimethylaminoethyl methacrylate and 0.2ml of butyl methacrylate (the molar ratio is 58:21:1), add the initiator Each of ammonium persulfate and sodium bisulfite was 0.2100 g, and nitrogen gas was introduced for 10 to 15 minutes to ensure that the reaction system of the conical flask was filled with nitrogen and the dissolved oxygen in the solution was zero. Seal the mouth of the Erlenmeyer flask with a self-sealing tape, put it into a constant temperature water bath shaker at 55°C, and vibrate at 200rpm for 12 hours. After the reaction is over, add absolute ethanol to the reaction solution at a ratio of 1:1, and the polymer solid will precipitate at the bottom, take out the solid and clean it with absolute ethanol, and put it in a vacuum drying oven for drying. The solid obtained by drying is t...
Embodiment 2
[0025] pH-responsive regenerative polymer P ADB4.6 preparation
[0026] Add 120ml of deionized water to a 250ml Erlenmeyer flask with a stopper, then add 5.5ml of acrylic acid, 8ml of dimethylaminoethyl methacrylate and 0.5ml of butyl methacrylate (the molar ratio is 25:15:1), add the initiator Each of ammonium persulfate and sodium bisulfite was 0.2400g, and nitrogen gas was introduced for 10 to 15 minutes to ensure that the reaction system of the conical flask was filled with nitrogen and the dissolved oxygen in the solution was zero. Seal the mouth of the Erlenmeyer flask with a self-sealing tape, put it into a constant temperature water bath shaker at 62°C, and vibrate at 200 rpm for 12 hours. After the reaction is over, add absolute ethanol to the reaction solution at a ratio of 1:1, and the polymer solid will precipitate at the bottom, take out the solid and clean it with absolute ethanol, and put it in a vacuum drying oven for drying. The solid obtained by drying is t...
Embodiment 3
[0028] pH-responsive regenerative polymer P ADB4.6 Prepared in a 500L reactor
[0029] Add 180KG of deionized water into the 500L reactor, pass through nitrogen to remove the oxygen in the reaction system, the nitrogen flow rate is 1m 3 / h, the stirring speed is 100rpm. Half an hour later, 8.25 L of acrylic acid, 12 L of dimethylaminoethyl methacrylate and 0.75 L of butyl methacrylate were added and the nitrogen gas flow was continued. After half an hour, add initiator ammonium persulfate and sodium bisulfite each 360g, reduce nitrogen flow rate to 0.2m 3 / h, and steam was passed into the reactor jacket to heat to 62°C. After the reaction is over, add absolute ethanol to the reaction solution at a ratio of 1:1, and the polymer solid will precipitate at the bottom, take out the solid and clean it with absolute ethanol, and put it in a vacuum drying oven for drying.
[0030] The heating process is carried out intermittently. First raise the temperature of the reactor to 40°...
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