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Preparation method and application of polyester nanofiber modified membrane adsorption material

A polyester nano-fiber modification technology, applied in fiber treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of high non-selective adsorption and regeneration costs, limited wide application, and high preparation costs. Achieve the effects of fast adsorption speed, large adsorption capacity and high specific surface area

Inactive Publication Date: 2013-07-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Activated carbon has the characteristics of large specific surface area and porosity, but the high cost of non-selective adsorption and regeneration limits its wide application.
Ion exchange resin has the advantages of large specific surface area, porosity, and high selective adsorption of aromatic hydrocarbon molecules, but its preparation cost is high, its hydrophilicity is low, and its process is complex

Method used

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  • Preparation method and application of polyester nanofiber modified membrane adsorption material
  • Preparation method and application of polyester nanofiber modified membrane adsorption material
  • Preparation method and application of polyester nanofiber modified membrane adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Dissolve 5.1 g of PET in 27 mL of trifluoroacetic acid (TFA) and 3 mL of dichloromethane (CH 2 Cl 2 ) in a mixed solvent, TFA / CH 2 Cl 2 The volume ratio is 9:1, and the electrospinning solution is uniform and transparent under constant stirring at room temperature.

[0030] 2) Put the electrospinning solution in step 1) into the liquid storage tube of the electrospinning device, control the extrusion speed to 0.002mm / s through a micro-injection pump, and the distance from the spinning nozzle to the receiver is 15cm, and spin Electrospinning was performed at a voltage of 25kV, and the spun fiber membrane was received on a collector to obtain a nanofiber membrane. After the fiber film sample was prepared and sprayed with gold, its morphology was observed by scanning electron microscope, and the obtained electron microscope picture was as follows figure 1 As shown, the diameter of the nanofibers constituting the polyester nanofiber film is 307 nm.

[0031] 3) Place...

Embodiment 2

[0035] 1) Dissolve 5.1 g of PET in 27 mL of trifluoroacetic acid (TFA) and 3 mL of dichloromethane (CH 2 Cl 2 ) in a mixed solvent, TFA / CH 2 Cl 2 The volume ratio is 9:1, and the electrospinning solution is uniform and transparent by stirring continuously until uniform.

[0036] 2) Put the electrospinning solution in step 1) into the liquid storage tube of the electrospinning device, control the extrusion speed to 0.002mm / s through a micro-injection pump, and the distance from the spinning nozzle to the receiver is 15cm, and spin Electrospinning was performed at a voltage of 25kV, and the spun fiber membrane was received on a collector to obtain a nanofiber membrane. After the fiber film sample was prepared and sprayed with gold, its morphology was observed by scanning electron microscope, and the obtained electron microscope picture was as follows figure 1 As shown, the diameter of the nanofibers constituting the polyester nanofiber film is 307 nm.

[0037] 3) Place the ...

Embodiment 3

[0041] 1) Dissolve 5.1 g of PET in 27 mL of trifluoroacetic acid (TFA) and 3 mL of dichloromethane (CH 2 Cl 2 ) in a mixed solvent, TFA / CH 2 Cl 2 The volume ratio is 9:1, and the electrospinning solution is uniform and transparent by stirring continuously until uniform.

[0042] 2) Put the electrospinning solution in step 1) into the liquid storage tube of the electrospinning device, control the extrusion speed to 0.002mm / s through a micro-injection pump, and the distance from the spinning nozzle to the receiver is 15cm, and spin Electrospinning was performed at a voltage of 25kV, and the spun fiber membrane was received on a collector to obtain a nanofiber membrane. After the fiber film sample was prepared and sprayed with gold, its morphology was observed by scanning electron microscope, and the obtained electron microscope picture was as follows figure 1 As shown, the diameter of the nanofibers constituting the polyester nanofiber film is 307 nm.

[0043] 3) Place the ...

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Abstract

The invention relates to a preparation method and an application of a polyester nanofiber modified membrane adsorption material. The preparation method of the adsorption material comprises the following steps: adding polyethylene terephthalate spinning solution into electrostatic spinning equipment and preparing a polyester nanofiber membrane by using the electrostatic spinning equipment; and after carrying out low-temperature plasma grafting modification on the obtained polyester nanofiber membrane, performing cleaning and drying to obtain the polyester nanofiber membrane adsorption material. The nanofiber diameter is 200-500 nm before the adsorption material is modified, the nanofiber diameter after modification is increased, and after plasma treatment, if different grafting monomers are used, different nanofiber diameters are obtained. The preparation method of the adsorption material is simple to operate, and the obtained nanofiber membrane has the characteristics of hydrophilcity, low cost, large adsorption quantity, quick adsorption speed and wide raw material source. The adsorption material can efficiently and quickly adsorb heavy metal ions Cu (II).

Description

technical field [0001] The invention belongs to the field of adsorption materials, in particular to a polyester (PET) nanofiber modified membrane adsorption material capable of efficiently adsorbing heavy metal ions. Background technique [0002] Heavy metals mainly refer to metals with a relative density above 5, mainly including copper, lead, zinc, tin, nickel, cobalt, antimony, mercury, cadmium and bismuth. Industrial and agricultural wastewater, urban domestic sewage and various mining wastewater contain a large amount of Heavy metal ions, which are bioaccumulated through the food chain, constitute a serious threat to organisms and human health. my country's GB18918-2002 standard stipulates that the concentration of heavy metals allowed to be discharged is: the total concentration of mercury <0.001mg / L, the total concentration of cadmium <0.01mg / L, and the total concentration of lead <0.1mg / L. Therefore, the removal and recovery of heavy metal ions in sewage is...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62D04H1/435D04H1/728D06M14/32
Inventor 付志峰董小翠曹鼎石艳
Owner BEIJING UNIV OF CHEM TECH
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