Preparation method for regenerated fibroin fiber
A technology for regenerating silk fibroin and protein fibers, which is applied in the field of preparation of regenerated silk protein fibers, can solve the problems of excessive waste liquid, cumbersome steps, and not conforming to the new concept of low-carbon environmental protection, etc., and achieve the goal of reducing production costs and controlling protein Degradation effect
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Embodiment 1
[0021] Preparation of spinning solution:
[0022] (1) the silkworm cocoon is 0.3% Na by mass percent 2 CO 3 After the aqueous solution is degummed, it is dissolved in a lithium bromide aqueous solution with a molar concentration of 9.0mol / L to obtain a regenerated silk fibroin-lithium bromide aqueous solution;
[0023] (2) centrifuging, filtering, dialysis and concentrating the solution to obtain a pure regenerated silk fibroin aqueous solution with a mass percentage of 18%;
[0024] (3) Adding an aqueous solution of calcium chloride with a molar concentration of 1.5mol / L in the pure regenerated silk fibroin aqueous solution to obtain a regenerated silk fibroin aqueous solution with a calcium ion molar concentration of 0.15mol / L; (4) continue to concentrate to make the regenerated silk The mass percentage of plain protein was 50%, and the spinning solution was obtained.
[0025] Preparation of regenerated silk protein fibers:
[0026] When the temperature is 5°C, the spinn...
Embodiment 2
[0029] Preparation of spinning solution:
[0030] (1) the silkworm cocoon is 0.7% Na by mass percent 2 CO 3 After the aqueous solution is degummed, it is dissolved in a lithium bromide aqueous solution with a molar concentration of 9.5mol / L to obtain a regenerated silk fibroin-lithium bromide aqueous solution;
[0031] (2) centrifuging, filtering, dialysis and concentrating the solution to obtain a pure regenerated silk fibroin aqueous solution with a mass percentage of 20%;
[0032] (3) Adding an aqueous solution of calcium chloride with a molar concentration of 3.0mol / L in the pure aqueous solution of regenerated silk fibroin to obtain an aqueous solution of regenerated silk fibroin with a molar concentration of calcium ions of 0.3mol / L; (4) continue to concentrate to make the regenerated silk The mass percentage of plain protein was 60%, and the spinning solution was obtained.
[0033] Preparation of regenerated silk protein fibers:
[0034] When the temperature is 35°C...
Embodiment 3
[0037] Preparation of spinning solution:
[0038] (1) the silkworm cocoon is 0.5% Na by mass percentage 2 CO 3 After the aqueous solution is degummed, it is dissolved in a lithium bromide aqueous solution with a molar concentration of 9.2mol / L to obtain a regenerated silk fibroin-lithium bromide aqueous solution;
[0039] (2) centrifuging, filtering, dialysis and concentrating the solution to obtain a pure regenerated silk fibroin aqueous solution with a mass percentage of 19%;
[0040] (3) Adding an aqueous solution of calcium chloride with a molar concentration of 3.0mol / L in the pure aqueous solution of regenerated silk fibroin to obtain an aqueous solution of regenerated silk fibroin with a molar concentration of calcium ions of 0.3mol / L; (4) continue to concentrate to make the regenerated silk The mass percentage of plain protein was 53%, and the spinning solution was obtained.
[0041] Preparation of regenerated silk protein fibers:
[0042] When the temperature is 2...
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