A dopamine-mediated polypyrrole conductive hydrogel and preparation method thereof
A conductive hydrogel and polypyrrole technology, applied in the field of biomedical materials, can solve the problems of reduced electrical properties, uneven dispersion, insolubility, etc., and achieve the effect of improving mechanical properties, improving electrical properties, and stabilizing electrical properties
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Embodiment 1
[0034] The preparation method of a polypyamine-mediated polypyrolic conductive hydrogel of the present embodiment is as follows:
[0035] (1) Weighing 5g gelatin dissolved in 50 ml of phosphate buffer solution, stirred at 50 ° C to gelatin completely dissolve; 3 ml of methacrylic anhydride droplets were added dropwise to the above solution, continuous reactions for 3 h, transfer to a phosphate buffer solution The reaction was terminated; the above solution was placed in a dialysis bag for 5 days, and the dialyzed solution was poured into the centrifuge tube, 2000 r / min centrifugally precipitated, frozen and dried to give a modified gelatin.
[0036] (2) Weighing 0.1 g of a modified gelatin sample, 0.05 g of acrylamide monomer, dissolved in a 2 ml phosphate buffer solution of 45 ° C, add 0.01 g of photoinitiator Irgacure2959, after it is completely dissolved, transferred to the PDMS mold The polymerization is initiated under ultraviolet light, and the polymerization time is 30s, ...
Embodiment 2
[0041] The preparation method of a polypyamine-mediated polypyrolic conductive hydrogel of the present embodiment is as follows:
[0042] (1) Weighing 5g gelatin dissolved in 50 ml of phosphate buffer solution, stirred at 50 ° C to completely dissolve; 5 ml of methacrylic anhydride droplets were added dropwise to the above solution, continued to react 6 h, transfer to a phosphate buffer solution The reaction was terminated; the above solution was placed in a dialysis bag for 7 days, and the dialyzed solution was poured into the centrifuge tube, centrifuged with 3000 r / min precipitated, frozen and dried to give a modified gelatin.
[0043] (2) Weighing 0.1 g of modified gelatin sample, 0.1 g of acrylamide monomer, dissolved in a 2 ml phosphate buffer solution of 50 ° C, add 0.015 g of photoinitiator Irgacure2959, and transferred to the PDMS mold after it is completely dissolved. The polymerization is initiated under ultraviolet light, and the polymerization time is 90s, then rele...
Embodiment 3
[0048] The preparation method of a polypyamine-mediated polypyrolic conductive hydrogel of the present embodiment is as follows:
[0049] (1) Weighing 5g gelatin is dissolved in 50 ml of phosphate buffer solution, stirred at 50 ° C to completely dissolve; 6 ml of methacrylic anhydride droplets are added dropwise to the above solution, continuous reaction 12h, transfer to a phosphate buffer solution The reaction was terminated; the above solution was placed in the dialysis bag in the dialysis bag, and the dialyzed solution was poured into the centrifuge tube, 4000 r / min centrifugally precipitated, frozen and dried to give a modified gelatin.
[0050] (2) Weighing 0.1 g of modified gelatin sample, 0.2 g of acrylamide monomer, dissolved in a 2 ml phosphate buffer solution of 60 ° C, add 0.02 g of photoinitiator Irgacure2959, after it is completely dissolved, transferred to the PDMS mold The polymerization is initiated under ultraviolet light, then the polymerization time is 120s, t...
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