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Preparation method of aminated nanofiber membrane with high specific surface area

A nanofiber membrane, high specific surface area technology, applied in chemical instruments and methods, fiber processing, inorganic chemistry, etc., can solve problems such as loss of function, and achieve good adsorption, low cost, and easy large-scale production and operation.

Inactive Publication Date: 2013-11-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since only the functional groups on the surface of the fiber can contact with the target body and perform its function, while the functional groups in the fiber lose the opportunity to contact with the target body due to the coating effect, thus losing their function

Method used

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  • Preparation method of aminated nanofiber membrane with high specific surface area
  • Preparation method of aminated nanofiber membrane with high specific surface area
  • Preparation method of aminated nanofiber membrane with high specific surface area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Dissolve 10g of polyacrylonitrile PAN in 90g of N,N'-dimethylformamide DMF, then add 25g of poly-N-vinylpyrrolidone PVP, and stir at 60°C for 48 hours to obtain a uniform, Transparent electrospinning solution; the spinning solution is added to the container, extruded by a micro-injection pump, the nozzle is connected to a high-voltage positive electrode, the electrospinning parameters are voltage 25KV, nozzle aperture 1.5mm, solution flow rate 1.5ml / h, environment The temperature was 25°C, the air relative humidity was 35%, and electrospinning was performed. The obtained PAN-PVP composite nanofibers had an average diameter of 500 nm, a deposition thickness of 100 μm, and a porosity of 93%.

[0028] (2) Soak the PAN-PVP composite nanofiber membrane obtained in (1) into deionized water, adjust pH=5.0 with HCl, soak at 95°C for 48h, take out the membrane, wash it with deionized water, and dry Dry to obtain a nanofibrous membrane with a porous, micro-nano structure, tes...

Embodiment 2

[0032] (1) Dissolve 20g polyacrylonitrile PAN in 70g N,N'-dimethylformamide DMF, then add 10g sodium bicarbonate NaHCO 3 , stirred at 50°C for 24 hours to obtain a uniform electrospinning solution with a concentration of 30%. Add the spinning solution to the container and extrude it under the control of a micro-injection pump. The nozzle is connected to a high-voltage positive electrode. , the nozzle aperture is 1.5mm, the solution flow rate is 1.5ml / h, the ambient temperature is 25°C, and the relative air humidity is 35%. Electrospinning is carried out, and the obtained PAN-NaHCO 3 The composite nanofibers have an average diameter of 450 nm, a deposition thickness of 100 μm, and a porosity of 90%.

[0033] (2) The PAN-NaHCO obtained in (1) 3 Soak the composite nanofiber membrane in deionized water, adjust the pH=3.0 with HCl, soak at 65°C for 24 hours, take out the membrane, wash it with deionized water, and dry it to obtain a nanofiber membrane with a porous, micro-nano str...

Embodiment 3

[0037] (1) Dissolve 10g of polyacrylonitrile PAN in 80g of N,N'-dimethylformamide DMF, then add 20g of ethylene oxide PEO, and stir at 60°C for 48h to obtain a uniform and transparent electrospun electrospun with a concentration of 27.3%. Silk solution: Add the spinning solution to the container, and extrude it under the control of a micro-injection pump. The nozzle is connected to a high-voltage positive electrode. The electrospinning parameters are voltage 25KV, nozzle aperture 1.5mm, solution flow rate 1.5ml / h, and ambient temperature 25°C. The relative air humidity was 35%, and electrospinning was performed. The average diameter of the obtained PAN-PEO composite nanofibers was 600nm, the deposition thickness was 100μm, and the porosity was 90%.

[0038] (2) Soak the PAN-PEO composite nanofiber membrane obtained in (1) into deionized water, adjust pH=5.0 with HCl, soak at 90°C for 48h, take out the membrane, wash it with deionized water, and dry Dry to obtain a nanofibrous ...

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Abstract

The invention relates to a preparation method of an aminated nanofiber membrane with a high specific surface area. The preparation method comprises the following steps of: dissolving two polymer materials with the weight ratio of 1: (0.1-10) or dissolving a polymer material and an inorganic salt into a solvent, dissolving while stirring at the temperature of 20-80 DEG C for 4-96h, and carrying out electrostatic spinning to obtain a composite nanofiber membrane; soaking the composite nanofiber membrane into water, regulating the pH value, soaking at the temperature of 20-95 DEG C for 2-48h, washing and drying to obtain a nanofiber membrane with a porous micro / nano structure and a high specific surface area; and immersing the nanofiber membrane with a porous micro / nano structure and a high specific surface area into water, adding an amination reaction reagent to carry out amination reaction at the temperature of 50-200 DEG C, then, taking out the fiber membrane, washing the fiber membrane to be neutral, and drying the fiber membrane to obtain the aminated nanofiber membrane with a high specific surface area. The product provided by the invention is applied to fields such as adsorption and separation of precious metal ions, heavy metal ions and transition metal ions, chemical probes, sensors, environment monitoring, catalysts, biological medicines and the like.

Description

technical field [0001] The invention belongs to the field of preparation of polymer functional nanofiber membranes, in particular to a preparation method of aminated nanofiber membranes with high specific surface area. Background technique [0002] In recent years, functional chelating fibers have been widely used in water treatment, seawater desalination, biomedicine, environmental monitoring, catalytic catalysts, chemical probes and other fields. Since the functional group is based on fiber as a carrier, no organic solvent is used in the application process, and organic compounds containing functional groups will not have problems such as residue and leakage during application, and will not cause pollution and toxicity to the environment and human body , and, after physical and chemical treatment, the chelating fiber can be regenerated and reused repeatedly. It is a new type of green, low-carbon, environmentally friendly, economical and energy-saving functional material. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/32D06M13/332
Inventor 王雪芬洪贵山王敏李雄神领弟杨寅
Owner DONGHUA UNIV
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