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Preparation method of lithium ion imprinted cross-linked chitosan porous microspheres

A technology of cross-linked chitosan and porous microspheres, which is applied in the field of material science, can solve problems such as the loss of lithium resources, and achieve the effects of high desorption efficiency, simple and convenient operation, and high adsorption performance

Active Publication Date: 2021-08-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because lithium has little toxicity and is not easy to cause pollution, many lithium-containing wastewaters are directly discharged without recycling, resulting in a large loss of lithium resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) get 100mL concentration and be that the acetic acid solution of 4% is in the beaker, add 4g chitosan powder, after ultrasonic dissolution is complete, then add 2g polyethylene glycol and fully dissolve, obtain acetic acid-chitosan solution;

[0031] (2) Get 10mL of acetic acid-chitosan solution, take the acetic acid-chitosan solution with a No. 7 needle, adjust the distance between the needle and the liquid surface to be 15cm, and inject 40mL of 40mL with a mass fraction of 8% at a speed of 30 drops / min. Sodium hydroxide solution, soak and solidify for 5h, the gel beads are placed in deionized water and washed several times to obtain chitosan porous gel beads;

[0032] (3) Get the wet state chitosan porous gel beads 15g that step (2) forms in 100mL deionized water, add 15mL37% formaldehyde solution, at 45 ℃, magnetic stirring reaction 3h; 2 Under protective flow, add 5g of p-tert-butylphenol and 30mL of sodium hydroxide solution with a mass fraction of 8%, and carry...

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PUM

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Abstract

The invention discloses a preparation method of lithium ion imprinted cross-linked chitosan porous microspheres, which comprises the following steps: by taking hydrosol formed by acetic acid and chitosan powder as a dispersion phase and a sodium hydroxide solution as a continuous phase, carrying out physical cross-linking to form chitosan gel beads; and by taking chitosan gel beads as a carrier, lithium ions as template ions, p-tert-butylphenol as a functional monomer, conducting graft modification, and by taking epoxy chloropropane as a cross-linking agent, eluting lithium ions through hydrochloric acid, so as to prepare the lithium ion imprinted cross-linked chitosan porous microspheres. The porous microspheres prepared by the method have relatively high adsorption capacity and recognition capacity on lithium ions, are good in adsorption and regeneration performance, and are simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of material science, in particular to a preparation method of lithium ion imprinted cross-linked chitosan porous microspheres. Background technique [0002] Lithium metal and its alloys and compounds have a wide range of applications in many fields such as energy, chemical industry, and military, including ceramics, glass manufacturing, metallurgy, and catalyst synthesis. Due to the high specific energy and specific power of lithium, it is widely used in new environmentally friendly lithium battery materials; in addition, lithium-based grease accounts for 50% of the grease industry due to its high temperature resistance, high pressure resistance, and difficult oxidation. % or more; for manic patients, drugs containing lithium ions can have a certain inhibitory effect on their agitation, and have clinical curative effect on mania. Because lithium has little toxicity and is not easy to cause pollution, many l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/268B01J20/28016B01J20/28054Y02P10/20
Inventor 潘丙军洪晨璐刘晓晗陈都潘梅兰刘兰靖
Owner ZHEJIANG UNIV OF TECH
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