Stable high-strength conducting fibroin gel in natural environment and preparation method of gel
A technology of silk protein and natural environment, which is applied in the field of high-strength conductive natural biomacromolecule gel and its preparation, can solve the problems of poor mechanical properties, uneven distribution, and large size of β-sheet aggregates in hydrogel, and achieve Excellent mechanical properties, cost reduction, and easy recycling
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[0024] In Example 1, the degummed mulberry silk was dissolved in 1-ethyl-3-methylimidazole acetate (EMImAc) ionic liquid to prepare a 10 wt% mulberry silk protein ionic liquid solution (RSF / EMImAc). Take 15g of the above-mentioned mulberry silk protein ionic liquid solution, add 15g, 40% (v / v) ethanol aqueous solution under gentle stirring, and then centrifuge the solution (8000 r / min, 8min) to remove bubbles, and then Stored in a sealed container at 25°C, a silk protein gel with good mechanical properties (solid content of 5 wt%) is obtained, its compressive modulus and tensile modulus reach 0.6 MPa and 0.5 MPa, respectively, tensile strength and elongation at break The rates are 0.12 MPa and 80% respectively. Tests show that this gel can conduct electricity, and its ionic conductivity at room temperature is 7.5 mS / cm. This gel will not dry out when placed in a natural environment for more than two years, and its various properties are stable.
Example Embodiment
[0025] In Example 2, the degummed mulberry silk was dissolved in 1-ethyl-3-methylimidazole acetate (EMImAc) ionic liquid to prepare a 15 wt% mulberry silk protein ionic liquid solution (RSF / EMImAc). Take 5.8 g of the above-mentioned mulberry silk protein ionic liquid solution, add 5.8 g, 20% (v / v) ethanol aqueous solution under gentle stirring, and then centrifuge the solution (8000 r / min, 8min) to remove bubbles, and then It is sealed and stored at 37°C to obtain a high-strength silk protein gel (solid content of 7.5 wt%), with a compressive modulus and tensile modulus of 1.8 MPa and 1.6 MPa, respectively, tensile strength and elongation at break The rates are 0.24 MPa and 110% respectively. Tests show that the gel can conduct electricity, and its ionic conductivity at room temperature is 2.6 mS / cm. This gel will not dry out when placed in a natural environment for more than two years, and its various properties are stable.
Example Embodiment
[0026] In Example 3, the degummed mulberry silk was dissolved in 1-ethyl-3-methylimidazole acetate (EMImAc) ionic liquid to prepare a 20 wt% mulberry silk protein ionic liquid solution (RSF / EMImAc). Take 10 g of the above mulberry silk protein ionic liquid solution, slowly add 2 g of EMImAc ionic liquid under gentle stirring, and then slowly add 8 g of deionized water to it after stirring evenly, and then centrifuge the solution (8000 r / min, 8min) to remove air bubbles, and then store it in a sealed container at 50°C to obtain a high-strength silk protein gel (solid content of 10 wt%) with a compressive modulus and tensile modulus of 3.7 MPa and 3.1 MPa, respectively , The tensile strength and elongation at break are 0.41 MPa and 147%, respectively. Tests show that the gel can conduct electricity, and its ionic conductivity at room temperature is 1.1 mS / cm. This gel will not dry out when placed in a natural environment for more than two years, and its various properties are st...
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