A kind of phase-change temperature-regulating chitosan composite fiber and preparation method thereof
A composite fiber, chitosan technology, applied in the chemical characteristics of fibers, chemical instruments and methods, conjugated synthetic polymer man-made filaments, etc., can solve problems such as the impact of mechanical properties, and achieve moderate enthalpy value and excellent solid state transformation behavior. Effect
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Embodiment 1
[0026] (1) Sodium alginate is added to the deionized aqueous solution, fully stirred at a speed of 500rpm / min at 30°C, and a sodium alginate solution with a mass fraction of 5% is formed by swelling and dissolving, and the degraded alginate with a mass fraction of 2% The chitosan solution was added into the sodium alginate solution at a volume ratio of 1:1, and the mixed solution was formed by intensive stirring and concentration, wherein the molecular weight of chitosan in the chitosan solution was 5000.
[0027] (2) the mass fraction prepared by step (1) is 15% of the mixed solution as the external phase fluid, and the polyethylene glycol aqueous solution with a mass fraction of 15% is used as the internal phase fluid, and the external phase fluid and the internal phase fluid at 40 ° C are respectively At the flow rate of 200 μl / min and 80 μl / min, mercury was injected into the capillary coaxial focusing microfluidic device, and primary composite fibers were collected at the o...
Embodiment 2
[0030] (1) Sodium alginate is added to the deionized aqueous solution, fully stirred at a speed of 700rpm / min at 35°C, and a sodium alginate solution with a mass fraction of 8% is formed by swelling and dissolving, and the degraded alginate with a mass fraction of 5% The chitosan solution was added into the sodium alginate solution at a volume ratio of 1:3, stirred vigorously and concentrated to form a mixed solution, wherein the molecular weight of chitosan in the chitosan solution was 15,000.
[0031] (2) the mass fraction prepared by step (1) is 25% mixed solution as the external phase fluid, and the polyethylene glycol aqueous solution with a mass fraction of 25% is used as the internal phase fluid, and the external phase fluid and the internal phase fluid at 45 ° C are respectively At the flow rate of 300 μl / min and 150 μl / min, mercury was injected into the capillary coaxial focusing microfluidic device, and primary composite fibers were collected at the outlet.
[0032] ...
Embodiment 3
[0034] (1) Sodium alginate is added to the deionized aqueous solution, fully stirred at a speed of 600rpm / min at 33°C, and a sodium alginate solution with a mass fraction of 6% is formed by swelling and dissolving, and the degraded alginate with a mass fraction of 3% The chitosan solution was added into the sodium alginate solution at a volume ratio of 1:2, and the mixed solution was formed by vigorously stirring and concentrating, wherein the molecular weight of chitosan in the chitosan solution was 10,000.
[0035] (2) The mass fraction prepared in step (1) is the mixed solution of 18% as the external phase fluid, and the polyethylene glycol aqueous solution with the mass fraction of 16% is used as the internal phase fluid, and the external phase fluid and the internal phase fluid at 42 ° C are respectively At the flow rate of 250 μl / min and 100 μl / min, mercury was injected into the capillary coaxial focusing microfluidic device, and primary composite fibers were collected at...
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