Chitosan nano fibrous membrane adsorbing material and preparation method thereof
A technology of chitosan nano and adsorption materials, applied in fiber treatment, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problems of high cost of non-selective adsorption and regeneration, limiting the wide application of activated carbon, and low hydrophilic performance , to achieve the effect of low cost, increased contact area and large adsorption capacity
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[0040] Example 1
[0041] Dissolve 1 g of CS in 24 g of pure trifluoroacetic acid to obtain a CS solution with a concentration of 4% by weight. After magnetic stirring at room temperature for 24 hours, a transparent CS spinning solution was obtained, and then it was allowed to stand for defoaming. Adjust the distance between the spinneret connected to the syringe and the upper surface of the drum receiver to 10 cm, set the rotation speed of the drum receiver to 5 rpm, and apply a voltage of 20 kV between the spinneret and the grounded drum receiver. At room temperature and the humidity is 50-80%, add CS spinning solution into the syringe of the electrospinning equipment. CS spinning solution is injected into the spinneret at a flow rate of 0.4ml / h under the action of a syringe pump. The CS nanofiber membrane is obtained on the receiver and then dried, for example, in a drying cabinet at 60-100° C. for 12 hours. Put the obtained CS nanofiber membrane in an alkaline solution such ...
Example Embodiment
[0044] Example 2
[0045] 0.8 g of CS was dissolved in 19.2 g of pure trifluoroacetic acid to obtain a CS solution with a concentration of 4 wt%. After 24 hours of magnetic stirring at room temperature, a transparent CS spinning solution was obtained, and then it was allowed to stand for defoaming. Adjust the distance between the spinneret connected to the syringe and the upper surface of the drum receiver to 15 cm, set the rotation speed of the drum receiver to 5 rpm, and apply a voltage of 25 kV between the spinneret and the grounded drum receiver. At room temperature and the humidity is 50-80%, add CS spinning solution into the syringe of the electrospinning equipment. CS spinning solution is injected into the spinneret at a flow rate of 0.4ml / h under the action of a syringe pump. The CS nanofiber membrane is obtained on the receiver and then dried, for example, in a drying cabinet at 60-100° C. for 12 hours. Put the obtained CS nanofiber membrane in an alkaline solution such...
Example Embodiment
[0048] Example 3
[0049] 0.8 g of CS was dissolved in 19.2 g of pure trifluoroacetic acid to obtain a CS solution with a concentration of 4 wt%. After 24 hours of magnetic stirring at room temperature, a transparent CS spinning solution was obtained, and then it was allowed to stand for defoaming. Adjust the distance between the spinneret connected to the syringe and the upper surface of the drum receiver to 15 cm, set the rotation speed of the drum receiver to 5 rpm, and apply a voltage of 10 kV between the spinneret and the grounded drum receiver. At room temperature and the humidity is 50-80%, add CS spinning solution into the syringe of the electrostatic spinning equipment. CS spinning solution is injected into the spinneret at a flow rate of 0.1ml / h under the action of a syringe pump. The CS nanofiber membrane is obtained on the receiver and then dried, for example, in a drying cabinet at 60-100° C. for 12 hours. Put the obtained CS nanofiber membrane in an alkaline soluti...
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