Nanofiber molecularly imprinted membrane with high selectivity for putrescine and preparation method thereof
A molecularly imprinted membrane and nanofiber technology, applied in the field of functional polymer materials, can solve the problems of low sensitivity and response rate, difficulty in obtaining accessibility and permeability, etc., and achieve simple preparation process, good selective adsorption capacity, no Effects of Poison and Potential Biological Traits
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[0028] Example 1
[0029] (1) Dissolve 3 g of polyvinyl alcohol (PVA) in 26.955 mL of deionized water at 90 ℃, then add 0.045 mg of 1,4-butanediol (BDO) template at 70 ℃, stir and dissolve to obtain spinning liquid;
[0030] (2) Withdraw 5 mL of the spinning solution obtained in (1) with a 20 mL syringe, and put on the 21 with an inner diameter of 0.51 mm. # Then place the syringe with the spinning solution in the electrospinning machine for spinning. The spinning conditions are: positive voltage: 15Kv; spinning distance: 15 cm; drum speed: 600 r / min; spinning Spinning temperature: 20-27 ℃, spinning humidity: 50-68%, spinning for 2 hours to prepare nanofiber membrane materials;
[0031] (3) Take off the nanofiber membrane obtained in (2), cut it into 3 mm×3 mm fiber blocks with a blade, and then dry it in an oven at 60°C;
[0032] (4) Add 10 mL of methanol to the dried fiber block for standing elution, change the eluent once, the first time is 6 hours, then soak for 2 hours, finally ...
Example Embodiment
[0045] Example 2
[0046] (1) Dissolve 3 g of polyvinyl alcohol (PVA) in 26.925 mL of deionized water at 90 ℃, then add 0.075 mg of 1,4-butanediol (BDO) template at 70 ℃, stir and dissolve to obtain spinning liquid;
[0047] (2) Withdraw 5 mL of the spinning solution obtained in (1) with a 20 mL syringe, and put on the 21 with an inner diameter of 0.51 mm. # Then place the syringe with the spinning solution in the electrospinning machine for spinning. The spinning conditions are: positive voltage: 15Kv; spinning distance: 15 cm; drum speed: 600 r / min; spinning Spinning temperature: 20-27 ℃, spinning humidity: 50-68%, spinning for 2 hours to prepare nanofiber membrane materials;
[0048] (3) Take off the nanofiber membrane obtained in (2), cut it into 3 mm×3 mm fiber blocks with a blade, and then dry it in an oven at 60°C;
[0049] (4) Add 10 mL of methanol to the dried fiber block for standing elution, change the eluent once, the first time is 6 hours, then soak for 2 hours, finally ...
Example Embodiment
[0051] Example 3
[0052] (1) Dissolve 3 g of polyvinyl alcohol (PVA) in 26.925 mL of deionized water at 90 ℃, then add 0.075 mg of 1,4-butanediol (BDO) template at 70 ℃, stir and dissolve to obtain spinning liquid;
[0053] (2) Withdraw 5 mL of the spinning solution obtained in (1) with a 20 mL syringe, and put on the 21 with an inner diameter of 0.51 mm. # Then place the syringe with the spinning solution in the electrospinning machine for spinning. The spinning conditions are: positive voltage: 15Kv; spinning distance: 15 cm; drum speed: 600 r / min; spinning Spinning temperature: 20-27 ℃, spinning humidity: 50-68%, spinning for 2 hours to prepare nanofiber membrane materials;
[0054] (3) Take off the nanofiber membrane obtained in (2), cut it into 3 mm×3 mm fiber blocks with a blade, and then dry it in an oven at 60°C;
[0055] (4) Add 10 mL of methanol to the dried fiber block for standing elution, change the eluent once, the first time is 6 hours, then soak for 2 hours, and fina...
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