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Ion exchange polymer microsphere and synthesis method thereof

A technology of ion exchange and synthesis method, which is applied in the field of microsphere preparation, can solve the problems of reducing separation efficiency, etc., and achieve the effects of easy experimental conditions, adjustment of experimental conditions, and simple reaction process

Pending Publication Date: 2022-07-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these covalent modification methods still cannot avoid the problems of modification defects and poor controllability of modification density, which makes the inert polymer microsphere matrix easily exposed to adsorption and separation objects, resulting in non-ionic interactions, thereby reducing the separation efficiency
Therefore, it remains challenging to develop ion-exchange polymer microspheres with controllable ionic density and suppressed non-ionic interactions.

Method used

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  • Ion exchange polymer microsphere and synthesis method thereof
  • Ion exchange polymer microsphere and synthesis method thereof
  • Ion exchange polymer microsphere and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a) configure an aqueous solution, including surfactant sodium lauryl sulfate 0.05g, hydrophilic monomer sodium styrene sulfonate 0.5g, and water 20g;

[0028] b) Prepare an oil solution, including 1.35 g of hydrophobic monomer styrene, 0.0225 g of hydrophobic cross-linking agent divinylbenzene, 0.1 g of hydrophobic polymer polystyrene (weight average relative molecular mass 35000), and 0.1 g of hydrophobic initiator azodiiso Nitrile 20mg, hydrophobic solvent chlorododecane 0.044g;

[0029] c) Mix the aqueous solution and the oil solution, and emulsify into a uniform oil-in-water emulsion by ultrasonication;

[0030] d) heating to 70°C to initiate monomer polymerization, and the reaction was carried out for 18h;

[0031] e) The product obtained from the reaction is washed with a solvent and freeze-dried to obtain a powder.

[0032] The diameter of the synthesized microspheres is 4.0μm±0.3μm by SEM characterization, the surface has a porous morphology, the size and morp...

Embodiment 2

[0034] a) Prepare an aqueous solution, including 0.3 g of polyethylene glycol as a surfactant, 0.7 g of sodium styrene sulfonate as a hydrophilic monomer, and 40 g of water;

[0035] b) Prepare an oil solution, including 2.7 g of hydrophobic monomer styrene and 0.045 g of hydrophobic cross-linking agent divinylbenzene

[0036] g, hydrophobic polymer polystyrene (weight average relative molecular mass 35000) 0.2g, hydrophobic initiator azobisisobutyronitrile 60mg, hydrophobic solvent chlorododecane 0.09g;

[0037] c) Mix the aqueous solution and the oil solution, and emulsify into a uniform oil-in-water emulsion by ultrasonication;

[0038] d) heating to 75°C to initiate monomer polymerization, and react for 12h;

[0039] e) The product obtained from the reaction is washed with a solvent and freeze-dried to obtain a powder.

[0040] The diameter of the synthesized microspheres is 3.5μm±0.2μm by SEM characterization, the surface has a porous morphology, the size and morphology...

Embodiment 3

[0042] a) configure an aqueous solution, including surfactant sodium lauryl sulfate 0.5g, hydrophilic monomer sodium styrene sulfonate 6.5g, and water 200g;

[0043] b) Prepare an oil solution, including 15g of hydrophobic monomer styrene and 0.225 g of hydrophobic crosslinking agent divinylbenzene

[0044] g, hydrophobic polymer polystyrene (weight average relative molecular mass 45000) 1.2g, hydrophobic initiator azobisisobutyronitrile 200mg, hydrophobic solvent chlorododecane 0.44g;

[0045] c) Mix the aqueous solution and the oil solution, and emulsify into a uniform oil-in-water emulsion by ultrasonication;

[0046] d) heating to 70°C to initiate monomer polymerization, and the reaction is carried out for 72h;

[0047] e) The product obtained from the reaction is washed with a solvent and freeze-dried to obtain a powder.

[0048] The diameter of the synthesized microspheres is 4.5μm±0.3μm by SEM characterization, the surface has a porous morphology, the size and morpholog...

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Abstract

The invention relates to an ion exchange polymer microsphere and a synthesis method thereof. The microsphere has a micron size, is internally composed of a hydrophobic polymer, and has a solid and compact structure; and the outer part is composed of a charged hydrophilic polymer and has a nano-porous structure. By changing the types of the hydrophobic polymer and the charged hydrophilic polymer, the chemical components and the surface appearance of the microspheres can be regulated and controlled. The microspheres have uniform size and morphology, the preparation method is simple, large-scale production is easy, and the microspheres have wide industrial application value. The ion exchange polymer microsphere with the micro-nano hierarchical heterostructure has great value in adsorption and separation of various molecules, ions and particles, and is expected to be applied to the fields of medicine purification, food detection, environmental governance and the like.

Description

technical field [0001] The invention relates to the technical field of microsphere preparation. More specifically, it relates to a class of ion-exchange polymer microspheres with micro-nano hierarchical heterostructures. The microspheres have micrometer-scale diameters, and the nanoporous structures on their surfaces are nanoscale. Background technique [0002] Ion exchange polymer microspheres are widely used in the adsorption and separation of molecules, ions and particles due to their advantages of acid resistance, alkali resistance and salt resistance. [0003] The preparation methods of the existing ion-exchange polymer microspheres mainly include non-covalent coating and covalent modification, the purpose of which is to introduce ions into the inert polymer microsphere matrix. Taking non-covalent coating as an example, charged polyelectrolyte or latex particles are coated on polymer microspheres through hydrophobic or electrostatic interactions on the surface of poly...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/36C08F212/14C08F220/14C08F222/02C08F220/06C08F220/34C08F230/06C08F212/32B01J13/02
CPCC08F212/08C08F220/14C08F212/21C08F212/32B01J13/02C08F212/36C08F212/30C08F222/02C08F212/22C08F220/06C08F220/34C08F212/26C08F230/065
Inventor 梁鑫淼王树涛宋永杨李秀玲董雪芳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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