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Hydrophobic polymer material surface hydrophilicity improving method

A hydrophobic polymer and hydrophilic technology, which is applied in the field of improving the surface hydrophilicity of hydrophobic polymer materials, can solve the problem that the surface hydrophilicity of the material cannot be lasting, and achieves reliable treatment effect, improved surface hydrophilicity and simple process. Effect

Inactive Publication Date: 2009-11-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of unsustainable hydrophilicity on the surface of materials in the existing blending technology, the present invention uses amphiphilic microgels with thermosensitive cores and non-thermosensitive cores as hydrophilic modification components. Surface Hydrophilic Modification of Hydrophobic Polymer Materials by Casting and Melt Blending Extrusion

Method used

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  • Hydrophobic polymer material surface hydrophilicity improving method

Examples

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Effect test

Embodiment 1

[0030] 100.0g deionized water, 5.00g styrene (St) monomer, 0.05g crosslinking agent divinylbenzene (DVB) and 1.00g mass fraction are polyethylene glycol methacrylate (M W =1000) macromonomer aqueous solution was added in the reactor, stirred and nitrogen exhausted. Raise the temperature to 60°C, add 2 mL of an aqueous solution of potassium persulfate (KPS) (containing 0.10 g KPS) as an initiator, and react for 12 h under the condition of stirring and blowing nitrogen. After the reaction is finished, the product is purified by dialysis through a dialysis membrane (MWCO=14000), and then freeze-dried to obtain a dry PS-PEO microgel with a non-thermosensitive core.

[0031] Prepare 10wt% PVC / THF solution and 10wt% PS / THF solution with tetrahydrofuran (THF) as solvent; add 0.04g of PS-PEO dry microgel into 15mLTHF, and disperse by ultrasonic for 30 minutes to obtain PS-PEO / THF dispersion. Mix 4mL PS-PEO / THF dispersion with 1mL PVC / THF solution and oscillate ultrasonically for 30...

Embodiment 2

[0035]With 100.0g deionized water, 2.50g St monomer, 0.03g DVB and 2.00g 50wt% polyvinylpyrrolidone (PVP) macromolecular monomer aqueous solution (M W =2000) into the reactor, stirred and exhausted with nitrogen. The temperature was raised to 60° C., 1 mL of KPS aqueous solution (containing 0.13 g of KPS) was added, and the reaction was carried out for 36 h under the conditions of stirring and nitrogen exhaust. After the reaction is completed, the product is purified by dialysis through a dialysis membrane (MWCO=14000), and then freeze-dried to obtain a PS-PVP microgel with a non-thermosensitive core.

[0036] The preparation of PVC / THF solution and PS / THF solution is as shown in embodiment example 1. Add 0.04 g of PS-PVP dry microgel with non-thermosensitive core into 15 mL THF, and disperse by ultrasonic for 30 minutes to obtain PS-PVP / THF dispersion liquid. Mix 3.5mL PS-PVP / THF dispersion with 0.5mL PVC / THF solution, and ultrasonically vibrate for 30 minutes to obtain a m...

Embodiment 3

[0040] 250g of deionized water, 2.00g of isopropylacrylamide (NIPAM) monomer, 0.05g of crosslinking agent N, N'-methylenebisacrylamide (BIS) and 8.70g of polyethylene glycol with a mass fraction of 50wt% Alcohol methacrylate (M W =5000) macromonomer aqueous solution was added into the reactor, stirred and nitrogen exhausted. The temperature was raised to 70°C, 10 mL of KPS aqueous solution (containing 0.60 g of KPS) was added, and the reaction was carried out for 24 h under stirring and nitrogen flow. After the reaction is finished, the product is refined by dialysis through a dialysis membrane (MWCO=14000), and then freeze-dried to obtain a PNIPAM-PEO microgel with a thermosensitive core in a dry state.

[0041] The preparation of PVC / THF solution and PS / THF solution is as shown in embodiment example 1. Add 0.15 g of PNIPAM-PEO dry microgel with thermosensitive core into 60 mL THF, and disperse by ultrasonic for 30 minutes to obtain PNIPAM-PEO / THF dispersion. Mix 3.5mL PNI...

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Abstract

The invention relates to a hydrophobic polymer material surface hydrophilicity improving method. In order to solve the problem that material surface hydrophilicity is unendurable in the current blended technology, amphipathic microgel containing thermosensitive core and non thermosensitive core is taken as hydrophile modification ingredient in the invention, and surface hydrophilization modification is carried out on hydrophobic polymer material by casting method and melt blending extrusion method respectively. (1) The casting method includes: dispersion liquid of the microgel and hydrophobic polymer solution are blended, the blended even dispersion liquid is casted into a film in a mold, and solvent is removed, thus obtaining a polymer film. (2) The melt blending extrusion method includes: dry microgel and hydrophilic polymer particles are blended and then put into a rotor internal mixer to be mixed for a short time at certain temperature; the material is crushed into particles after discharging, is extruded into sheet or wire by an extruder and forms film by a hot press. The invention has the advantages of easy technique and reliable treatment effect without a complex device and can effectively improve the surface hydrophilicity of the hydrophobic polymer.

Description

technical field [0001] The present invention provides a method for improving the hydrophilicity of the surface of a hydrophobic polymer material. Background technique [0002] Hydrophobic polymers have been widely used in the biomedical field due to their good plasticity, wear resistance, and high mechanical properties. For example, high-density polyethylene has excellent strength, hardness, and wear resistance, and has been used in surgical repair materials such as artificial hip bones and artificial joints; polytetrafluoroethylene (PTFE) has excellent physical and mechanical properties and small tissue reactions after implantation, etc. It is widely used in artificial organs and tissue repair materials due to its advantages. As an implant or a material directly connected to a living body, a series of problems such as allergy, rejection, coagulation, and cell distortion may occur during contact with a living body, and the hydrophilic surface can prevent the adhesion of pla...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08J3/075C08J5/18B29C69/02B29C43/58B29B9/02B29B7/28C08F212/08C08F220/54C08F220/28C08L25/06C08L27/06C08L23/12C08L23/06
Inventor 陈晓农鹿浩魏小飞张立毅武自伟苏志强石淑先
Owner BEIJING UNIV OF CHEM TECH
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