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Hydrophilic modification method of polystyrene material, and product thereof

A polystyrene-based and styrene-based technology, which is applied in the field of hydrophilic modification of polystyrene-based materials, can solve the problem that hydrophilic macromolecules are difficult to enter into the pores of microspheres, and porous PSt microspheres and PSt microspheres cannot be modified. The pore size of microspheres becomes smaller and other problems, so as to achieve the effect of stable hydrophilic material, reducing hydrophobicity and easy operation.

Inactive Publication Date: 2014-04-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both the physical coating and the chemical coating are polymers, and there are the following problems in the coating modification of conventional porous PSt microspheres: 1) due to the small pore size, it is difficult for hydrophilic macromolecules to enter the microsphere pores. Aggregation phenomenon exists on the surface of microspheres; 2) Due to the small pore size, hydrophilic macromolecules will block the pores, making the pore size of PSt microspheres significantly smaller
For functional core-shell structure composite microspheres, porous PSt microspheres cannot be modified due to method limitations

Method used

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  • Hydrophilic modification method of polystyrene material, and product thereof
  • Hydrophilic modification method of polystyrene material, and product thereof
  • Hydrophilic modification method of polystyrene material, and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Example 1 Preparation of Polystyrene-based (PSt-Cl) Microspheres Containing Active Chlorine on Surface

[0066] Mix 5g of methylstyrene (MST), 0.1g of trichloroethylstyrene, and 1g of divinylbenzene (DVB) as a monomer phase, add 5g of n-heptane (HP), 0.3g of peroxide Dibenzoyl (BPO), dissolved as a dispersed phase. Add 2g of polyvinyl alcohol (PVA) and 0.0015g of dodecylsulfuric acid (SDS) into 100ml of deionized water and dissolve it as the continuous phase. Using conventional membrane emulsification technology (3.5μm membrane pores), the dispersed phase is uniformly dispersed in the continuous phase to form a uniform oil / water emulsion. Then the prepared emulsion was moved into a reactor equipped with a condenser tube, a stirring rod, and a nitrogen conduit, and after replacing oxygen with nitrogen, the microsphere polymerization suspension was obtained after polymerization at 70° C. for 10 h. After the polymerization, the microsphere product was obtained by suc...

Embodiment 2

[0067] Example 2 Preparation of Polystyrene-based (PSt-Cl) Microspheres Containing Active Chlorine on Surface

[0068] Weigh 10g of ethyl styrene (EST), 10g of m-chloromethyl styrene, 0.5g of potassium persulfate (KPS) and mix and dissolve it as the oil phase; add 1.8g of PVA, 0.0004g of SDS and 0.0045g of deionized water to 150ml of deionized water Na 2 SO 4 Completely dissolved as the water phase. Using rapid membrane emulsification technology (2.8μm membrane pores), the oil-water phase mixture is quickly pressed through the microporous membrane tube and circulated emulsified for 5 times to obtain a uniform emulsion. Then the prepared emulsion was moved into a reactor equipped with a condenser tube, a stirring rod, and a nitrogen conduit, and after replacing oxygen with nitrogen, the microsphere polymerization suspension was obtained after a polymerization reaction at 85° C. for 16 hours. After the polymerization, centrifuge at 3000rpm with a centrifuge to obtain the ...

Embodiment 3

[0069] Example 3 Preparation of Polystyrene-based (PSt-Cl) Microspheres Containing Active Chlorine on Surface

[0070] Weigh 1g of styrene (St), 7g of p-chloromethylstyrene (cMSt), 1g of DVB, 0.42g of azoamidine (V65), 3g of hexadecane (HD) and 3g of n-hexanol (HA). Oil phase; add 3.5g PVA, 0.0008g SDS and 0.009g Na to 300ml deionized water 2 SO 4 Completely dissolved as the water phase. Using conventional membrane emulsification technology (5.2μm membrane pores), the oil phase is uniformly dispersed in the water phase to form a uniform oil / water emulsion. Then the prepared emulsion was moved into a reactor equipped with a condenser tube, a stirring rod, and a nitrogen conduit, and after replacing oxygen with nitrogen, the microsphere polymerization suspension was obtained after a polymerization reaction at 80° C. for 20 h. After the polymerization, the microsphere product was obtained by suction filtration with a Buchner funnel. After repeated washing with deionized w...

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Abstract

The invention discloses a hydrophilic modification method of a polystyrene material with the surface containing active chlorine, and a hydrophilic modification product thereof. The method comprises the following steps: 1, swelling the polystyrene material with the surface containing active chlorine by using an organic solvent; 2, carrying out a hydrophilic function group and the active chlorine on the surface of the polystyrene material in the presence of an alkaline substance to make the hydrophilic function group cross-linked to the surface of the material processed in step 1. The hydrophilic modification method has the advantages of simple operation, mild reaction condition, stable hydrophilic material, difficult shedding of a coating group, and great reduction of the hydrophobicity of the polystyrene skeleton. Additionally, the active chlorine on the surface of the polystyrene material can covalently graft different function groups through a substitution reaction to obtain a functional medium product suitable for different separation modes in order to satisfy the special needs of the biochemical separation field.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a method for hydrophilic modification of polystyrene materials containing active chlorine on the surface and a product prepared by the method. Background technique [0002] Polystyrene (PSt) materials have the advantages of stable chemical properties, pH tolerance, and pressure tolerance, and are widely used in the separation and purification of biochemical molecules. However, the characteristics of unmodified PSt materials severely limit its application fields. For example, PSt microspheres cannot be directly used as chromatographic media to separate protein biomacromolecules except for reversed-phase chromatography. The reason is that the surface of PSt microspheres lacks functional groups, and it is difficult to directly couple hydrophilic ligands; in addition, the strong hydrophobic interaction between the surface of PSt microspheres and protein molecule...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/00C08F8/32C08F212/12C08F212/14C08F212/36C08F212/08
Inventor 马光辉巩方玲李强闫晓峰张荣月周炜清苏志国
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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