Temperature response type europium ion imprinting composite membrane preparation method and application

A temperature-responsive, europium ion technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve problems such as separation difficulties and rare reports of europium ions, and achieve good antibacterial performance, Excellent separation effect and high selective adsorption capacity

Inactive Publication Date: 2017-06-23
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the similar atomic structure, similar ionic radius and close symbiosis between europium and associated elements in nature, it is very difficult to separate europium from the associated elements
At present, the commonly used rare earth separation methods are mainly solvent extraction method, ion exchange method, adsorption separation method, etc., but the method of using ion imprinted composite membrane to separate and purify europium ions is rarely reported.

Method used

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  • Temperature response type europium ion imprinting composite membrane preparation method and application
  • Temperature response type europium ion imprinting composite membrane preparation method and application
  • Temperature response type europium ion imprinting composite membrane preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Modification of regenerated cellulose membrane surface

[0049] First, 0.1211g Tris and 0.2g DA were placed in 100mL deionized water, mixed fully under ultrasonic conditions and adjusted to a pH value of 8.5 to obtain a mixed solution, three pieces of RCMs were immersed in the mixed solution, and reacted for 0 hours at room temperature to obtain a modified For the support membrane dRCMs, take out the modified support membrane, soak and wash it with deionized water three times, 10 minutes each time, and dry the modified support membrane at room temperature after cleaning.

[0050] (2) Preparation of non-self-supporting graphene oxide composite film

[0051] First, add 0.5g of silica nanospheres with a diameter of ~300nm to 100mL of a mixed solution of ethanol and water (ethanol:water=4:1), add 3mL of KH-570 after passing nitrogen for 5 minutes, and seal it with a degreasing tape. Reaction at 80°C for 16 hours, after centrifugation, the product (kSiO2) was washed wit...

Embodiment 2

[0066] (1) Modification of regenerated cellulose membrane surface

[0067] First, put 0.1211g Tris and 0.2g DA in 100mL of deionized water, mix thoroughly under ultrasonic conditions and adjust the pH value to 8.5 to obtain a mixed solution, immerse 3 pieces of RCMs in the mixed solution, and react at room temperature for 3 hours to obtain a modified For the support membrane dRCMs, take out the modified support membrane, soak and wash it with deionized water three times, 10 minutes each time, and dry the modified support membrane at room temperature after cleaning.

[0068] (2) Preparation of non-self-supporting graphene oxide composite film

[0069] First, add 0.5g of silica nanospheres with a diameter of ~300nm to 100mL of a mixed solution of ethanol and water (ethanol:water=4:1), add 3mL of KH-570 after passing nitrogen for 5 minutes, and seal it with a degreasing tape. Reaction at 80°C for 16 hours, after centrifugation, the product (kSiO2) was washed with alcohol and wat...

Embodiment 3

[0084] (1) Modification of regenerated cellulose membrane surface

[0085] First, put 0.1211g Tris and 0.2g DA in 100mL of deionized water, mix thoroughly under ultrasonic conditions and adjust the pH value to 8.5 to obtain a mixed solution, immerse 3 pieces of RCMs in the mixed solution, and react at room temperature for 6 hours to obtain a modified For the support membrane dRCMs, take out the modified support membrane, soak and wash it with deionized water three times, 10 minutes each time, and dry the modified support membrane at room temperature after cleaning.

[0086] (2) Preparation of non-self-supporting graphene oxide composite film

[0087] First, add 0.5g of silica nanospheres with a diameter of ~300nm to 100mL of a mixed solution of ethanol and water (ethanol:water=4:1), add 3mL of KH-570 after passing nitrogen for 5 minutes, and seal it with a degreasing tape. Reaction at 80°C for 16 hours, after centrifugation, the product (kSiO2) was washed with alcohol and wat...

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Abstract

The invention discloses a temperature response type europium ion imprinting composite membrane preparation method and belongs to the technical field of environmental functional material preparation. Specifically, a regenerated cellulose membrane is utilized as a supporting membrane, graphene oxide and modified silicon dioxide nanosphere are utilized as membrane preparing materials, an europium ion is utilized as a formwork, acrylic amide is utilized as a functional monomer, N-isopropyl acrylamide is utilized as a temperature sensitive type functional monomer, ethylene glycol dimenthacrylate is utilized as a cross-linking agent, azodiisobutyronitrile is utilized as an initiator, a composite membrane is prepared on the surface of the supporting membrane, a two-step temperature polymerization method is utilized to prepare a temperature response type europium ion imprinting composite membrane. A static adsorption experiment and a selective permeation experiment are utilized to research adsorption balance, adsorption kinetics, selective recognition and europium ion separation performance of the prepared temperature response type europium ion imprinting composite membrane. Results show that the temperature response type europium ion imprinting composite membrane prepared through the method disclosed by the invention has higher specific adsorption capacity on europium ions and excellent europium ion recognition and separation performance under condition of 35 DEG C.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and specifically relates to a preparation method and application of a temperature-responsive europium ion imprinted composite membrane for selectively identifying and separating europium ions in a mixed system. Background technique [0002] Ion imprinting technology (IIT), which was inspired by natural receptors in nature, simulates molecular recognition in nature (such as antigens and antibodies, substrates and enzymes, etc.), using target ions as templates, and selecting materials that can interact with template ions. Functional monomers, combined with cross-linking agents to polymerize around the template ions to form a space polymer network, use physical and chemical methods to elute the template ions, leaving space holes that conform to the size and shape of the ions, Thus, the polymer imprinted polymer with specific recognition and selective adsorption capacity for the ion is p...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C08F222/14C08F220/56C08F220/54C08J7/14C08J7/12
CPCB01J20/20B01J20/268B01J20/28035C08F222/10C08F222/102C08F2438/03C08J7/12C08J7/14C08J2301/08C08F220/56C08F220/54
Inventor 王良卢健姜大雨闫永胜秦莹莹
Owner JILIN NORMAL UNIV
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