Hydrophilic surface-crosslinked ultra high molecular weight polyethylene moulding material and preparation method thereof

An ultra-high molecular weight, molding material technology, applied in the field of ultra-high molecular weight polyethylene materials, can solve the problems of lack of durability, unstable hydrophilic surface, high technical requirements for equipment, increase surface tension, facilitate industrial production, simple craftsmanship

Active Publication Date: 2015-05-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above process requires high equipment technology, and the hydrophilic surface is unstable and lacks durability.

Method used

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  • Hydrophilic surface-crosslinked ultra high molecular weight polyethylene moulding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation process steps of the hydrophilic surface cross-linked ultra-high molecular weight polyethylene molding material in this embodiment are as follows:

[0038] (1) Preparation of ultra-high molecular weight polyethylene molding materials

[0039] Using the compression molding method, the ultra-high molecular weight polyethylene powder is hot-pressed with a flat vulcanizer at 200 ° C and 10 MPa for 10 minutes, and then cold-pressed at room temperature and 10 MPa for 5 minutes to make a 1 mm thick sheet material. Cut the sheet-like ultra-high molecular weight polyethylene into 25mm×9mm samples, first clean the samples with deionized water ultrasonically for 3 times, each time for 10 minutes, then extract with acetone for 12 hours, and then vacuum-dry at 40°C to obtain ultra-high Molecular weight polyethylene molding material;

[0040] (2) Preparation of ultraviolet photoinitiator solution and vinyl silane solution

[0041] Mix absolute ethanol and n-hexane w...

Embodiment 2

[0047] In this example, the composite solvent in step (2) is obtained by mixing absolute ethanol and n-hexane at a volume ratio of 21:9, and the initiator solution is a mixture of benzophenone and 2,4-dihydroxybenzophenone solution, wherein the mass concentration of benzophenone is 3%, and the mass concentration of 2,4-dihydroxybenzophenone is 2%.

[0048] In step (3), the two UV irradiation times were 10 minutes.

[0049] All the other processing conditions and operating method are identical with embodiment 1.

Embodiment 3

[0051] In the present embodiment, the composite solvent in step (2) is obtained by mixing absolute ethanol and n-hexane with a volume ratio of 21:49, and the initiator solution is a mixed solution of benzophenone and Michler's ketone, wherein benzophenone The mass concentration of is 3%, the mass concentration of Michler's ketone is 2%;

[0052] The energy density of ultraviolet light in two times of ultraviolet irradiation in step (3) is 400mJ / cm 2 , the irradiation time is 60 minutes;

[0053] All the other processing conditions and operating method are identical with embodiment 1.

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Abstract

The invention discloses a method for preparing a hydrophilic surface-crosslinked ultra high molecular weight polyethylene moulding material. The method comprises the following steps: (1) preparing the ultra high molecular weight polyethylene moulding material; (2) preparing an ultraviolet light initiator solution and a vinylsilane solution; (3) putting the ultra high molecular weight polyethylene moulding material in the ultraviolet light initiator solution, completely immersing, and radiating by an ultraviolet light with the energy density of at least 400 mJ/cm2 for 10-60 minutes, putting into the vinylsilane solution and completely immersing, radiating by an ultraviolet light with the energy density of at least 400 mJ/cm2 for 10-60 minutes, and cleaning the unreacted silane or auto-polymerized silane on the surface of the ultra high molecular weight polyethylene moulding material by absolute ethyl alcohol after finishing radiating; and (4) performing hydrolytic condensation. The moulding material obtained from the invention is high in abrasive resistance, durable in surface hydrophily and is safe in medical material application and can keep the impact-resistance strength and anti-fatigue performance.

Description

technical field [0001] The invention belongs to the technical field of ultra-high molecular weight polyethylene materials, and in particular relates to a method for surface modification of ultra-high molecular weight polyethylene materials and a hydrophilic surface cross-linked ultra-high molecular weight polyethylene molding material. Background technique [0002] Ultrahigh molecular weight polyethylene (UHMWPE) has excellent impact resistance, low friction, wear resistance, stress crack resistance, chemical corrosion resistance, hygiene and non-toxic properties, and has good biocompatibility, so It has been widely used in the field of biomedicine. In terms of artificial joints, UHMWPE is mainly used as acetabular and knee joint lining materials. Low-friction hip prosthesis with UHMWPE acetabulum and metal or ceramic joint head is commonly used in total hip replacement. However, the strength of UHMWPE in this type of artificial joint is relatively low. During the long-ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/18C08J3/24C08L23/06
Inventor 谢美菊余自力杨帮成
Owner SICHUAN UNIV
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