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Method for preparing thioamide-based chelating nanofiber for adsorbing heavy metal ions

A thioamide-based, heavy metal-adsorbing technology, which is applied in the fields of alkali metal compounds, fiber treatment, and fiber chemical characteristics, can solve the problems of low reusability, few types of adsorbed ions, and low adsorption capacity, and achieve high practical value , good regeneration performance and large adsorption capacity

Inactive Publication Date: 2011-08-03
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problems of low adsorption capacity, low reusability, poor stability, and few types of adsorbed ions in the prior art for heavy metal ion adsorption materials.

Method used

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  • Method for preparing thioamide-based chelating nanofiber for adsorbing heavy metal ions
  • Method for preparing thioamide-based chelating nanofiber for adsorbing heavy metal ions
  • Method for preparing thioamide-based chelating nanofiber for adsorbing heavy metal ions

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 1.6 g of polyacrylonitrile to 18.4 g of dimethylformamide, heat at 90° C. for 6 hours, until the polyacrylonitrile is completely dissolved and the solution appears yellow-brown, and cool to room temperature. The obtained polymer solution is put into a glass spinneret, the inner diameter of the spinneret head is 1.0 mm, the aluminum sleeve is used as the anode, and the aluminum foil is used as the cathode receiving plate to collect the fiber product. The distance between the two plates is 15 cm, and the applied voltage is Electrospinning was performed at 25kV, and a polyacrylonitrile nanofiber membrane was obtained on the receiving plate after 48 hours, with a fiber diameter of 100-300nm.

Embodiment 2

[0027] Add 1.8 g of polyacrylonitrile to 18.2 g of dimethylformamide, heat at 90° C. for 6 hours, until the polyacrylonitrile is completely dissolved and the solution appears yellow-brown, and cool to room temperature. The obtained polymer solution is put into a glass spinneret, the inner diameter of the spinneret head is 1.0 mm, the aluminum sleeve is used as the anode, and the aluminum foil is used as the cathode receiving plate to collect the fiber product. The distance between the two plates is 15 cm, and the applied voltage is Electrospinning was performed at 25kV, and a polyacrylonitrile nanofiber membrane was obtained on the receiving plate after 48 hours, with a fiber diameter of 200-400nm.

Embodiment 3

[0029] Add 2.0 g of polyacrylonitrile to 18.0 g of dimethylformamide, heat at 90° C. for 6 hours, until the polyacrylonitrile is completely dissolved and the solution turns yellow-brown, then cool to room temperature. The obtained polymer solution is put into a glass spinneret, the inner diameter of the spinneret head is 1.0 mm, the aluminum sleeve is used as the anode, and the aluminum foil is used as the cathode receiving plate to collect the fiber product. The distance between the two plates is 15 cm, and the applied voltage is Electrospinning was performed at 25kV, and a polyacrylonitrile nanofiber membrane was obtained on the receiving plate after 48 hours, with a fiber diameter of 300-500nm.

[0030] Pre-crosslinking of polyacrylonitrile nanofibers

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Abstract

The invention relates to a method for preparing a thioamide-based chelating nanofiber for adsorbing heavy metal ions by combining an electrostatic spinning technology with a chemical grafting technology. The method comprises the following steps of: preparing a nanofiber from polyacrylonitrile which has high chemical stability, is easily subjected to electrospinning and is taken as an initiative raw material of reaction by the electrostatic spinning technology, pre-crosslinking, and performing thioamidation to prepare the chelating nanofiber for adsorbing the heavy metal ions. The fiber membrane of the prepared chelating nanofiber has good appearance, uniform diameter, high mechanical property, heat stability and solvent resistance, and high property of adsorbing the heavy metal ions such as gold, silver, lead, mercury, palladium, cadmium and the like. By the technology, the preparation process is simple, production equipment is low-cost, and the chelating nanofiber has low requirement on production conditions, and high properties, so the chelating nanofiber has high practical value, the content of the heavy metal ions which are produced due to industrial development and harm human health is reduced, and the chelating nanofiber has a wide application prospect for solving the livelihood problem.

Description

technical field [0001] The invention belongs to the preparation technology of chelating fibers adsorbing heavy metal ions, and in particular relates to a method for preparing thioamide-based chelating nanofibers adsorbing heavy metal ions by combining electrospinning technology and chemical grafting technology. Background technique [0002] With the continuous development of global industry and social economy, when human beings enter a civilized society, the environmental hazards caused by heavy metal ions are becoming more and more serious, which gradually attracts people's attention. After entering the human body, heavy metals can strongly interact with physiological macromolecular substances to inactivate them, and may also accumulate in the human body to cause chronic poisoning, and this cumulative hazard sometimes takes more than ten years to appear. Therefore, it has become a focus problem that directly endangers human health and needs to be solved urgently. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/18D01F11/06D01D5/00B01J20/26B01J20/30B01J20/28
Inventor 王策张城城李响徐秀茹郑田
Owner JILIN UNIV
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