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Preparation method and application of palladium-ion-imprinted composite membrane for selectively separating palladium ions

An ion imprinting and palladium ion technology is applied in the field of preparation of ion imprinting composite membranes, which can solve the problems of poor membrane flux and low selectivity of ion imprinting membranes, achieve high porosity, facilitate subsequent separation, and have a wide temperature tolerance range. Effect

Inactive Publication Date: 2018-07-31
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the technical defects existing in the prior art, solve the problems of low selectivity and poor membrane flux of traditional ion imprinted membranes, so that the selective separation efficiency of target ions (palladium ions) is greatly improved

Method used

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  • Preparation method and application of palladium-ion-imprinted composite membrane for selectively separating palladium ions
  • Preparation method and application of palladium-ion-imprinted composite membrane for selectively separating palladium ions
  • Preparation method and application of palladium-ion-imprinted composite membrane for selectively separating palladium ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Preparation of S1, polydimethylsiloxane (PDMS) base film

[0055] Mix 2.0g of PDMS main agent and 0.2g of curing agent evenly and place in a polytetrafluoroethylene petri dish, put 2 sugar cubes (15mm×15mm×10mm) in the above petri dish, and make the petri dish under vacuum condition The mixed reagent in the medium completely fills the space of the sugar cube through capillary action, and the petri dish is placed in a 60°C drying oven to cure for 10 hours; take out the cured PDMS, wash and soak repeatedly in deionized water at 50°C to remove the sugar cube, and place it at 40°C After drying, the PDMS base film was obtained.

[0056] S2, preparation of modified PDMS membrane (KH570@PDMS)

[0057] Cut the PDMS basement membrane prepared in S1 into long strips (7.5mm×15mm×10mm), immerse 6 cut PDMS basement membranes in a mixed solution composed of 80mL ethanol and 20mL water, add 1mL γ-(formazan Acryloyloxy)propyltrimethoxysilane (KH570), nitrogen gas was passed through t...

Embodiment 2

[0068] Preparation of S1, polydimethylsiloxane (PDMS) base film

[0069] Mix 2.0g of PDMS main agent and 0.2g of curing agent evenly and place in a polytetrafluoroethylene petri dish, put 2 sugar cubes (15mm×15mm×10mm) in the above petri dish, and make the petri dish under vacuum condition The mixed reagent in the medium completely fills the space of the sugar cube through capillary action, and the petri dish is placed in a 60°C drying oven to cure for 10 hours; take out the cured PDMS, wash and soak repeatedly in deionized water at 50°C to remove the sugar cube, and place it at 40°C After drying, the PDMS base film was obtained.

[0070] S2, preparation of modified PDMS membrane (KH570@PDMS)

[0071] Cut the PDMS basement membrane prepared in S1 into long strips (7.5mm×15mm×10mm), immerse 6 cut PDMS basement membranes in a mixed solution composed of 80mL ethanol and 20mL water, add 3mL γ-(formazan Acryloyloxy)propyltrimethoxysilane (KH570), nitrogen gas was passed through t...

Embodiment 3

[0081] Preparation of S1, polydimethylsiloxane (PDMS) base film

[0082] Mix 2.0g of PDMS main agent and 0.2g of curing agent evenly and place in a polytetrafluoroethylene petri dish, put 2 sugar cubes (15mm×15mm×10mm) in the above petri dish, and make the petri dish under vacuum condition The mixed reagent in the medium completely fills the space of the sugar cube through capillary action, and the petri dish is placed in a 60°C drying oven to cure for 10 hours; take out the cured PDMS, wash and soak repeatedly in deionized water at 50°C to remove the sugar cube, and place it at 40°C After drying, the PDMS base film was obtained.

[0083] S2, preparation of modified PDMS membrane (KH570@PDMS)

[0084]Cut the PDMS basement membrane prepared in S1 into long strips (7.5mm×15mm×10mm), immerse 6 cut PDMS basement membranes in a mixed solution composed of 80mL ethanol and 20mL water, add 5mLγ-(formazol Acryloyloxy)propyltrimethoxysilane (KH570), nitrogen gas was passed through to ...

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Abstract

The invention belongs to the technical field of functional material preparation, and discloses a preparation method and application of a palladium-ion-imprinted composite membrane for selectively separating palladium ions. Specifically, a base film is prepared by using polydimethylsiloxane, and the palladium-ion-imprinted composite membrane can be prepared by use of palladium ion as a template, 8-aminoquinoline and 4-vinylpyridine as ligands, hydroxyethyl methacrylate as a functional monomer, ethylene glycol dimethacrylate a crosslinking agent and azobisisobutyronitrile as an initiator by combination of a sacrificial template method and an ion-imprinting polymerization technique. Selective adsorption experiments are used to study the selective adsorption capacity of the prepared palladium-ion-imprinted composite membrane; selective permeation experiments are used to study the selective permeation capacity of the prepared palladium-ion-imprinted composite membrane for a target substance(palladium ion) and a non-target substance (cobalt ion, copper ion, cadmium ion and nickel ion). The results show that the palladium-ion-imprinted composite membrane prepared by the invention has high specific recognition ability and adsorption separation ability for the palladium ions.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a preparation method and application of an ion imprinted composite membrane for selectively separating palladium ions. Background technique [0002] Palladium is a rare precious metal with scarce reserves on the earth. The annual demand for palladium in my country is about 60 tons, of which more than 50% is used as an important electroplating process raw material in military, aviation, aerospace and other national high-tech fields, as well as mobile phones, computers, automobiles and other manufacturing industries. In the palladium electroplating process, about 4% palladium ions that do not participate in the reaction coexist in the weakly acidic electroplating waste solution with heavy metal ions such as copper, zinc, copper, nickel, and cadmium at a concentration of 6-10 mg / L. It is often post-treated as ordinary industrial wastewater, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F103/16C02F101/20
Inventor 秦莹莹李红卢健李春香闫永胜
Owner JIANGSU UNIV
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