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High-toughness lithium ion sieve composite hydrogel membrane, preparation method thereof and application of high-toughness lithium ion sieve composite hydrogel membrane in seawater lithium extraction

A composite hydrogel and lithium ion technology, which is applied in seawater treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of difficult recovery and low adsorption rate, and achieve long adsorption time and high lithium adsorption capacity , the effect of excellent lithium selectivity

Pending Publication Date: 2022-04-05
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] In order to solve the problems that the existing lithium-ion sieve is powdery, difficult to recycle and low adsorption rate, the present invention provides a high-toughness lithium-ion sieve composite hydrogel membrane and its preparation method and its application in seawater lithium extraction. The high toughness lithium ion sieve composite hydrogel is λ-MnO 2 @ Interpenetrating gel composite membrane

Method used

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  • High-toughness lithium ion sieve composite hydrogel membrane, preparation method thereof and application of high-toughness lithium ion sieve composite hydrogel membrane in seawater lithium extraction
  • High-toughness lithium ion sieve composite hydrogel membrane, preparation method thereof and application of high-toughness lithium ion sieve composite hydrogel membrane in seawater lithium extraction
  • High-toughness lithium ion sieve composite hydrogel membrane, preparation method thereof and application of high-toughness lithium ion sieve composite hydrogel membrane in seawater lithium extraction

Examples

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Effect test

Embodiment 1

[0025] Example 1: A high-toughness lithium-ion sieve composite hydrogel membrane, characterized in that: the high-toughness lithium-ion sieve composite hydrogel membrane is an interpenetrating gel coated λ-MnO 2 (λ-MnO 2 @interpenetrating gel) composite material, LiMn is obtained by hydrothermal reaction of lithium hydroxide and hydrogen peroxide 2 o 4 , to obtain λ-MnO by acid washing 2 ; Polyvinyl alcohol PVA solution and sodium dodecylsulfonate SDS heating reaction, then add pyrrole, prepared λ-MnO 2 , mixed with ammonium persulfate APS solution in an ice-water bath, poured into a mold and reacted at room temperature to obtain λ-MnO 2 @ Interpenetrating gel composite membrane, soaked in deionized water, H 2 SO 4 Soak in medium, rinse with deionized water, and dry to form interpenetrating gel-coated λ-MnO 2 (λ-MnO 2 @interpenetrating gel) composites.

[0026] The specific preparation method is:

[0027] (1) LiMn 2 o 4 Preparation: 3.45 g of manganese acetate was d...

Embodiment 2

[0044] Example 2: λ-MnO in step (3) in this example 2 The mass ratio of powder to hydrogel is 0.91:2.73, and the rest of the methods are the same as in Example 1.

Embodiment 3

[0045] Embodiment 3: in step (2): LiMn 2 o 4 Fully divided in 0.5 M dilute hydrochloric acid, with Li + / H + Under the condition of a molar ratio of 1:1, pickling was carried out for 24 h, washed with deionized water until neutral, and then dried at 90 °C to obtain λ-MnO 2 nanoparticles; in step (3): add 0.91 g of λ-MnO 2 Powder, stirred again for 1 hour; all the other methods were the same as in Example 1.

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Abstract

The invention belongs to the technical field of high polymer material preparation, and provides a high-toughness lithium ion sieve composite hydrogel membrane, a preparation method thereof and application of the high-toughness lithium ion sieve composite hydrogel membrane in seawater lithium extraction in order to solve the problems that an existing lithium ion sieve is powdery, not easy to recover and low in adsorption rate. Carrying out acid washing to obtain lambda-MnO2; a polyvinyl alcohol PVA solution and sodium dodecyl sulfate SDS are subjected to a heating reaction, then pyrrole and the prepared lambda-MnO2 are added and mixed with an ammonium persulfate APS solution in an ice-water bath, the mixture is poured into a mold and subjected to a room-temperature reaction, a lambda-MnO2-interpenetrating gel composite membrane is obtained, the composite membrane is sequentially soaked in deionized water, soaked in H2SO4, washed with deionized water and dried, and the high-toughness lithium ion sieve composite hydrogel membrane is obtained.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and specifically relates to a high-toughness lithium-ion sieve composite hydrogel membrane and its preparation method and its application in seawater lithium extraction. The high-toughness lithium-ion sieve composite hydrogel has a λ -MnO 2 as Li + Imprinting sites to prepare highly tough porous λ-MnO 2 @interpenetrating gel composites. Background technique [0002] For decades, lithium has been used in ceramics, glass, rechargeable lithium batteries, nuclear fusion fuels, energy storage materials and other fields. As demand increases, meeting the supply of lithium resources is an important challenge. According to relevant studies, lithium resources mainly come from ores, salt lakes and seawater, among which Li in the sea + Content up to 2.6×10 14 kg, but the concentration is only 0.17ppm. At the same time, seawater also contains a large number of coexisting alkali met...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/28B01J20/30C02F1/28C02F101/10C02F103/08
Inventor 王美玲刘旭光孟志翔
Owner TAIYUAN UNIV OF TECH
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