Preparation method of biocompatible silk fibroin film for flexible magnetoelectric device substrate
A technology of biocompatible and magnetoelectric devices, which is applied in the field of preparation of biocompatible silk fibroin membranes, can solve the problems of inability to achieve biocompatibility, inability to biodegrade secondary recovery, etc., and achieve great production flexibility and preparation process Simple, fast and low energy consumption effect
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[0027] A preparation method of a biocompatible silk fibroin film used for a flexible magnetoelectric device substrate includes the following steps:
[0028] Step 1. Use natural silk as raw material to obtain pure silk fibroin aqueous solution through shearing, degumming, washing, dissolving, dialysis and centrifugation;
[0029] Step 2: Use pure silk fibroin aqueous solution as a biocompatible substrate material for making flexible magnetoelectric devices, and the concentration of silk fibroin is not less than 5% and not more than 15%;
[0030] Step 3. Clean the rigid substrate. The rigid substrate includes a polymethylmethacrylate substrate, a polystyrene substrate or a mica substrate;
[0031] Step 4. Coat the silk fibroin aqueous solution on the clean rigid substrate by spin coating, drip coating, spray coating, inkjet printing or laser printing;
[0032] Step 5. Perform natural air drying, convection air drying or drying on the rigid substrate coated with the solution;
[0033] Step ...
Example Embodiment
[0044] Example 1:
[0045] 1) Fill a 2L beaker with ultrapure water, after boiling
[0046] Add 8g of anhydrous sodium carbonate, weigh 10g of dried silk, add it, cook for 20min, and gently stir to remove the sericin on the silk. Then, rinse with 2L ultrapure water for 20 minutes, rinse with water three times, squeeze out the water, and spread out on aluminum foil to dry.
[0047] 2) After the silk fibroin is dried, weigh 6g silk fibroin, corresponding to 20g lithium bromide, and dissolve it into 25ml solution at a constant volume. Put the silk fibroin into the smallest possible beaker and slowly pour the lithium bromide solution. Dissolve in an oven at 60°C for 4 hours.
[0048] 3) Take two dialysis cassettes, soak them in ultrapure water for 20 minutes, insert two needles into the two corners of one side, inject 12ml of silk fibroin solution through one needle, and discharge air from the other needle, and finally pull out the needle. Use a sleeve holder to float in 2L ultrapure w...
Example Embodiment
[0054] Example 2:
[0055] 1) Use a 2L beaker to fill ultrapure water, add 8g of anhydrous sodium carbonate after boiling, weigh 10g of dried silk, add, cook for 20min, gently stir to remove the sericin on the silk. Then, rinse with 2L ultrapure water for 20 minutes, rinse with water three times, squeeze out the water, and spread out on aluminum foil to dry.
[0056] 2) After the silk fibroin is dried, weigh 6g silk fibroin, corresponding to 20g lithium bromide, and dissolve it into 25ml solution at a constant volume. Put the silk fibroin into the smallest possible beaker and slowly pour the lithium bromide solution. Dissolve in an oven at 60°C for 4 hours.
[0057] 3) Take two dialysis cassettes, soak them in ultrapure water for 20 minutes, insert two needles into the two corners of one side, inject 12ml of silk fibroin solution through one needle, and discharge air from the other needle, and finally pull out the needle. Use a sleeve holder to float in 2L ultrapure water. A magn...
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