Preparation method and application of macroporous penicillin acylase immobilized magnetic bead polymer carrier
A technology of penicillin acylase and polymer, which is applied in the direction of immobilization on/in an organic carrier, can solve the problems of lack of functional groups, low synthesis cost, and many preparation procedures in magnetic microspheres, and achieve favorable Industrial application, low synthesis cost and simple process
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Embodiment 1
[0026] 0.66 g FeCl 2 4H 2 O and 1.82 g FeCl 3 ·6H 2O was placed in 15 mL of formamide, heated at 60 °C for 10 min with vigorous stirring, then the temperature was raised to 90 °C, ammonia water was added to adjust the pH to 8–9, and the magnetic fluid was formed after aging for 1 h. Add 40 mL of tetrachlorethylene and 110 mL of n-heptane into a reactor equipped with a constant speed stirrer, nitrogen tube and condenser, and after heating to 60 °C in a water bath, add 0.20 g of Span- 60 and 9.0 g calcium stearate, then add 2.8 g glycidyl methacrylate, 3.8 g N, N′-methylenebisacrylamide and the magnetic fluid prepared above, stir for 30 min and then add 1.0 g azobis Isobutyronitrile was controlled to rotate at 450 r / min, and polymerized under nitrogen protection for 7 h. The product was separated in a magnetic field, washed with acetone and n-heptane, and dried in vacuum to constant weight. The average pore diameter was measured to be 32.1 nm, the pore volume was 0.53 cm3 / g,...
Embodiment 2
[0028] 1.32 g FeCl 2 4H 2 O and 1.82 g FeCl 3 ·6H 2 O, the consumption and preparation condition of all the other components are identical with embodiment 1. The average pore diameter of the synthesized sample is 30.0 nm, the pore volume is 0.60 cm3 / g, the s value is 8.3 emu / g, and the epoxy group content is 0.38 mmol / g. The penicillin acylase was immobilized on a synthetic magnetic bead-like carrier containing an epoxy group, and was used to catalyze the hydrolysis reaction of penicillin G potassium to prepare 6-APA. The apparent activity of the immobilized enzyme was 612 IU / g.
Embodiment 3
[0030] Formamide was 30 mL, and the amounts and preparation conditions of the remaining components were the same as in Example 1. The average pore diameter of the synthesized sample is 39.4 nm, the pore volume is 0.51 cm3 / g, the s value is 6.3 emu / g, and the epoxy group content is 0.43 mmol / g. Penicillin acylase was immobilized on a synthetic magnetic bead-like carrier containing epoxy groups to catalyze the hydrolysis reaction of penicillin G potassium to prepare 6-APA. The apparent activity of the immobilized enzyme was 662 IU / g.
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