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A preparation method of lithium ion imprinted nanocomposite film with high adsorption capacity

A nano-composite, lithium-ion technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of low lithium ion adsorption capacity and poor lithium ion selective adsorption effect, and achieve obvious selectivity effect , performance improvement, and the effect of increasing the adsorption capacity

Active Publication Date: 2022-03-08
NORTHEAST DIANLI UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing ion-imprinted membranes have a low adsorption capacity for lithium ions and have a poor selective adsorption effect on lithium ions, and provide a lithium-ion imprinted nanocomposite membrane with a high adsorption capacity. Preparation

Method used

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  • A preparation method of lithium ion imprinted nanocomposite film with high adsorption capacity

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specific Embodiment approach 1

[0012] Specific implementation mode 1: In this implementation mode, a method for preparing a lithium ion imprinted nanocomposite membrane with high adsorption capacity is completed according to the following steps:

[0013] 1. Preparation of acidified MWCNTs: Add multi-walled carbon nanotubes to hydrochloric acid solution, ultrasonically treat for 15min-20min, then stir in a water bath at 25°C-30°C at a speed of 60r / min-80r / min for 24h, and dry. Obtain acidified MWCNTs;

[0014] 2. Preparation of MWCNTs@PDA@PVDF membrane: Add PDA@PVDF membrane and acidified MWCNTs to methanol solution, stir in a water bath at 25°C-30°C for 3h-4h at a speed of 60r / min-80r / min, and use Washing with deionized water and drying to obtain MWCNTs@PDA@PVDF membrane, the quality of the PDA@PVDF membrane, the quality of acidified MWCNTs and the volume ratio of methanol solution is 0.25g: (1g ~ 2g): (60mL ~ 80mL);

[0015] 3. Preparation of lithium-ion imprinted nanocomposite membrane with high adsorpt...

specific Embodiment approach 2

[0019] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the ratio of the mass of multi-walled carbon nanotubes described in step one to the volume of hydrochloric acid solution is (1.5g~3g): (80mL~100mL), The concentration of hydrochloric acid solution is 0.1mol / L.

[0020] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1, acidified MWCNTs are obtained by drying at 80° C. to 100° C. for 4 hours to 6 hours.

[0022] Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing a high-adsorption lithium ion imprinted nanocomposite membrane, which relates to the technical field of environmental functional materials. The purpose of the present invention is to solve the problems that the existing ion imprinted membranes have low adsorption capacity for lithium ions and poor selective adsorption effect for lithium ions. Method: Add benzo‑15‑crown ether‑5 and lithium chloride to acetonitrile solution, stir in water bath for 2h~3h, add MWCNTs@PDA@PVDF membrane, methacrylic acid, ethylene glycol dimethacrylate and dimethicone NDI, under the protection of nitrogen, stirred for 18h-24h, washed with deionized water, dried in vacuum, and finally pickled to obtain lithium ion imprinted nanocomposite membrane with high adsorption capacity. The invention can obtain a preparation method of lithium ion imprinted nanocomposite film with high adsorption capacity.

Description

technical field [0001] The invention relates to the technical field of environmental functional materials, in particular to a preparation method of a lithium ion imprinted nanocomposite film with a high adsorption capacity. Background technique [0002] In China, the output of lithium batteries in 2012 was 4.18 billion, which increased to 7.84 billion in 2016, and this number is growing steadily. Lithium batteries have a wide range of functions, not only in the field of traditional consumer electronics (such as mobile phones, cameras, laptops and other portable electronic products), but also in fields such as electric vehicles in recent years. It is foreseeable that the demand for lithium batteries will continue to increase in the future, but due to the limited resources in nature, it will inevitably have an economic impact on the extraction of lithium battery raw materials and the manufacturing cost of lithium batteries. Therefore, the recovery of lithium ions from waste l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/12B01J20/26B01J20/28B01J20/30
CPCB01D67/0079B01D69/125B01D69/12B01J20/261B01J20/26B01J20/20B01J20/22B01J20/28033B01J2220/4812B01J2220/4806
Inventor 李正何广泽牛静东谭震南秀娜
Owner NORTHEAST DIANLI UNIVERSITY
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