Nanofiber membrane with heavy metal adsorbing function and preparation method of nanofiber membrane

A nanofiber membrane and nanofiber technology, which is applied in the field of nanofiber membrane with heavy metal adsorption function and its preparation, can solve the problems of inability to produce continuous fibers, limited polymer materials, and low production efficiency, and achieve short preparation time and low cost. Low, wide-ranging effects

Inactive Publication Date: 2015-05-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrospinning is currently the main method for preparing nanofibers, but this method is mainly based on solution spinning technology. Due to the limitation of the solution, the production efficiency is relatively low, and the equipment uses high-voltage static electricity, which has certain risks; polymerization At present, the method is only suitable for laboratory research, and a small amount of short fibers at the nanometer level can be prepared, and continuous fibers cannot be produced; the polymer materials applicable to the melt blown method and the phase separation method are very limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 75 grams of ethylene-vinyl alcohol copolymer (PE-co-PVA) and 425 grams of cellulose acetate butyrate (CAB) obtained multi-component blended fibers in which the dispersed phase was nanoscale dispersed in the matrix through a melt blending phase separation method; The temperature in each zone of the twin-screw is 185-235°C; at room temperature, the Soxhlet extraction method is used to dissolve and remove the CAB matrix phase components in the blended fibers using acetone as a solvent, and the PE-co-PVA nanofiber material is obtained. The diameter of the fiber ranges from 50 to 300 nm. The PE-co-PVA nanofibers are sheared and thinned, and dispersed in an ethanol solvent with a mass fraction of 0.5-5% to form a uniform nanofiber suspension, and then the suspension is passed through the hydrophobic nonwoven fabric by high-pressure airflow forming technology , to obtain PE-co-PVA nanofiber membrane with controllable thickness.

[0030] Cut 4×4㎝ 2 The PE-co-PVA nanofiber mem...

Embodiment 2

[0032]100 grams of propylene-vinyl alcohol copolymer (PP-co-PVA), 400 grams of cellulose acetate butyrate (CAB) obtained multi-component blended fibers in which the dispersed phase was nanoscale dispersed in the matrix through a melt blending phase separation method; The temperature in each zone of the twin-screw is 190-235°C; at room temperature, the CAB matrix phase component in the blended fiber is removed by Soxhlet extraction method using acetone solvent to obtain PP-co-PVA nanofiber material, and the micro-nanofiber is observed by scanning electron microscope The diameter range of 50 ~ 300nm. The PP-co-PVA nanofibers are sheared and thinned, and dispersed in an ethanol solvent with a mass fraction of 0.5-5% to form a uniform nanofiber suspension, and then the suspension is passed through the hydrophobic nonwoven fabric by high-pressure airflow forming technology , to obtain PP-co-PVA nanofibrous membrane with controllable thickness.

[0033] Cut 4×4㎝ 2 The PP-co-PVA na...

Embodiment 3

[0035] 125 grams of ethylene-acrylic acid copolymer (PE-co-AA) and 375 grams of cellulose acetate butyrate (CAB) were obtained by melt blending phase separation method to obtain a multi-component blended fiber whose dispersed phase was dispersed in the matrix at a nanoscale; The temperature of each zone of the screw is 185-235°C; at room temperature, the CAB matrix phase component in the blended fiber is removed by Soxhlet extraction method using acetone solvent to obtain PE-co-AA nanofiber material, and the micro-nanofiber is observed by scanning electron microscope The diameter ranges from 50 to 300nm. The PE-co-AA nanofibers are sheared and thinned, and dispersed in an ethanol solvent with a mass fraction of 0.5-5% to form a uniform nanofiber suspension, and then the suspension is passed through the hydrophobic nonwoven fabric by high-pressure airflow forming technology , to obtain PE-co-AA nanofiber membrane with controllable thickness.

[0036] Cut 4×4㎝ 2 The PE-co-AA n...

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Abstract

The invention relates to a nanofiber membrane with a heavy metal adsorbing function and a preparation method of the nanofiber membrane. The nanofiber membrane comprises a matrix and macromolecules self-assembled on the surface of the matrix. The preparation method comprises the following step: self-assembling the macromolecules carrying amino groups on a thermoplastic nanofiber membrane by virtue of a chemical oxidative polymerization method to obtain the nanofiber membrane. The nanofiber membrane is simple in preparation process and low in cost, and is capable of efficiently adsorbing heavy metal ions; the defect that a conventional heavy metal ion adsorbing agent requires to be separated for the second time is avoided; the effective removal of hexavalent chromium ions is realized by using a principle of first adsorption and then reduction; meanwhile, the macromolecules have a strong hydrogen bond function among hydrophilic nanofiber membranes, cannot drop from the membranes, and can be recycled.

Description

technical field [0001] The invention belongs to the field of heavy metal adsorption materials and preparation thereof, in particular to a nanofiber membrane with heavy metal adsorption function and a preparation method thereof. Background technique [0002] At present, more and more pollutants are produced in industrial production processes such as mining, storage, smelting, and processing. Among them, industrial wastewater in heavy chemical, textile and other fields contains a large amount of heavy metal ions, such as chromium, lead, cadmium, and nickel. , copper, etc. will enter into the soil, water body, atmosphere and other environmental media, causing serious harm to the survival and growth of animals and plants, and heavy metals can be enriched in large quantities in animals and plants. Humans will eat food rich in heavy metals, And chronic poisoning. [0003] Adsorption technology, as an effective method for removing heavy metal ions, plays an important role in the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/34C02F1/28C02F1/62
CPCB01J20/26B01J20/28033B01J2220/4812C02F1/285C02F2101/22
Inventor 徐丹丹肖茹郑晓婷晏珊陆建伟王华平
Owner DONGHUA UNIV
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