Cellulose/silk fibroin composite aerogel long fiber and preparation method thereof
A composite aerogel and silk fibroin technology is applied in the field of cellulose/silk fibroin composite aerogel long fibers and their preparation, which can solve the problem that the silk fibroin solution becomes dry and effective measures are not taken to improve the aerogel. Mechanical properties, difficulty of aerogel fibers, etc., to achieve the effect of simple process, conducive to mass production and promotion
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Embodiment 1
[0021] Step (1), preparation of cellulose matrix: Cut large-sized fermented coconut pieces with a thickness of 4mm, a length of 280mm, and a width of 220mm into strips with a thickness of 4mm, a width of 7mm, and a length of 9m, and ferment the cut Immerse the coconut flakes in 3% NaOH aqueous solution, heat them in an oil bath at a constant temperature of 82°C for 115 minutes, remove the soaked fermented coconut flakes; use a pH meter to monitor the change of pH value, wash with deionized water until medium ready for later use to obtain the cellulose matrix;
[0022] Step (2), preparation of silk fibroin solution: cut silkworm cocoons into small pieces of 8×8mm, then immerse them in 0.09mol / L sodium carbonate aqueous solution, and heat them at a constant temperature of 95°C for 50-60min in an oil bath Carry out degumming treatment, then remove it, put it into a petri dish and dry it in an oven at 48°C for 17 hours, and then immerse it in 10.7mol / L lithium bromide after drying...
Embodiment 2
[0029] Step (1), preparation of cellulose matrix: Cut the large fermented coconut flakes with a thickness of 2mm into strips with a thickness of 2mm, a width of 5mm, and a length of 12m, and dip the fermented coconut flakes into 4% In NaOH aqueous solution, use an oil bath to heat at 90°C for 120 minutes at a constant temperature, remove the soaked fermented coconut slices; use a pH meter to monitor the change in pH value, wash with deionized water until neutral for later use, and obtain cellulose matrix;
[0030] Step (2), preparation of silk fibroin solution: cut silkworm cocoons into small pieces of 10×10mm, then immerse in 0.02mol / L sodium bicarbonate aqueous solution, and heat at 90°C for 70min with an oil bath After degumming treatment, take it out, put it in a petri dish and dry it in an oven at 40°C for 12 hours. After drying, immerse it in 9.3mol / L lithium bromide. The mass ratio of silkworm cocoons to lithium bromide solution is 1:10. Heating at a constant temperatu...
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