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Preparation method and application of Jannus dual-layered ionic imprinting composite film

A technology of ion imprinting and composite membrane, applied in separation methods, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of high synthesis cost and limited selectivity of special adsorbents

Inactive Publication Date: 2018-01-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there are various kinds of adsorbents, such as carbon adsorbents, which are cheap and easy to operate, their selectivity is limited, and the synthesis cost of special adsorbents is relatively high.

Method used

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  • Preparation method and application of Jannus dual-layered ionic imprinting composite film
  • Preparation method and application of Jannus dual-layered ionic imprinting composite film
  • Preparation method and application of Jannus dual-layered ionic imprinting composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0045] (1) Take 7mL of the NCC suspension in step (1) after ultrasonic degassing, transfer it into a 25mL round bottom flask, first add 200mg of glucose, stir in a water bath at 60°C for 1h, then add dropwise ethyl orthosilicate TEOS 400 μL, continuously stirred and reacted for 2 hours, and finally poured the reaction solution into an evaporating dish, placed it in a constant temperature water bath to dry, and obtained a colorful and glossy regular nematic film material.

[0046] (2) Take 7mL of the NCC mixed solution in (1) (sonication degassing for 15 minutes before drawing), weigh 0.200g of glucose and 0.0046g of neodymium trichloride hexahydrate, mix and stir for 30 minutes. Then 110 μL of LLYMO-IDA ligand and 280 μL of TEOS, ie tetraethoxysilane, in step (2) were sequentially added in a water bath at 60°C. Finally, the reaction solution was poured into a plate and dried for 6 h after continuous stirring for 2 h. Synthesize the upper dysprosium ion imprinting mixed soluti...

Embodiment 2

[0053] (1) Weigh 7mL of the NCC mixed solution in step (1) (degassed by ultrasonication for 15min before absorbing), weigh 0.200g of glucose and 0.0046g of neodymium trichloride hexahydrate, and mix and stir for 30min. Then 110 μL of LLYMO-IDA ligand and 280 μL of TEOS, ie tetraethoxysilane, in step (2) were sequentially added in a water bath at 60°C. Finally, the reaction solution was poured into a plate and dried for 6 h after continuous stirring for 2 h. Synthesize the upper dysprosium ion imprinting mixed solution during this period, take a 25mL flask, absorb 7mL of the NCC mixed solution in (1) (ultrasonic degassing for 15min before absorbing), weigh 200mg glucose and 0.0046g dysprosium trichloride hexahydrate, mix Stir for 30min. Then, 7 μL of CPTES-ACAC ligand and 280 μL of TEOS, namely tetraethoxysilane, in step (2) were sequentially added in a water bath at 60°C. Finally, after continuing to stir and react for 2 hours, the reaction solution was placed on a semi-dry ...

Embodiment 3

[0058] (1) Weigh 7mL of the NCC mixed solution in step (1) (degassed by ultrasonication for 15min before absorbing), weigh 0.200g of glucose and 0.0046g of neodymium trichloride hexahydrate, and mix and stir for 30min. Then 110 μL of LLYMO-IDA ligand and 280 μL of TEOS, ie tetraethoxysilane, in step (2) were sequentially added in a water bath at 60°C. Finally, the reaction solution was poured into a plate and dried for 6 h after continuous stirring for 2 h. Synthesize the upper dysprosium ion imprinting mixed solution during this period, take a 25mL flask, draw 7mL of the NCC mixed solution in (1) (ultrasonic degassing for 15min before drawing), weigh 250mg glucose and 0.0023g dysprosium trichloride hexahydrate, mix Stir for 30min. Then 15 μL of CPTES-ACAC ligand and 280 μL of TEOS, ie tetraethoxysilane, in step (2) were sequentially added in a water bath at 60°C. Finally, after continuing to stir and react for 2 hours, the reaction solution was placed on a semi-dry plate, a...

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Abstract

The invention provides a preparation method and application of a Jannus dual-layered ionic imprinting composite film. The preparation method comprises the following steps: step 1, preparing nano crystal cellulose (NCC) turbid liquid; step 2, synthesizing GLYMO-IDA silane; step 3, synthesizing CPTES-ACAC silane; step 4, synthesizing a dual-layered ionic composite film; and step 5, synthesizing theJannus dual-layered ionic imprinting composite film. By means of the characteristics that the nano crystal cellulose which is wide in source is taken as a matrix functional self-assembled film, and athermosensitive monomer is grafted to achieve double preferential adsorption, the problem of adsorbing target ions preferentially can be solved well by introducing an ionic imprinting technology.

Description

technical field [0001] The invention relates to a Janus double-layer ion-imprinted composite membrane, in particular to a method combining biomass template-nanocrystalline cellulose and ion-imprinted technology to prepare rare earth Nd 3+ and Dy 3+ The ion imprinted double-layer composite membrane belongs to the field of material preparation technology and separation technology. Background technique [0002] Rare earth permanent magnet materials refer to permanent magnet materials made of alloys formed by transition metals and rare earth metals through a certain process, among which neodymium iron boron (NdFeB) permanent magnets are the most common, and its main component is the rare earth element neodymium (Nd) , iron (Fe), boron (B). Among them, the rare earth element is mainly neodymium (Nd), which can be partially replaced by other rare earth metals such as dysprosium (Dy) and praseodymium (Pr) in order to obtain different properties. The magnetic energy product of Nd...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D15/38
Inventor 郑旭东张福生刘恩秀刘恩利喻龙宝闫永胜
Owner JIANGSU UNIV
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