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Ultra-high molecular weight polyethylene plate as well as preparation method and application thereof

A technology of ultra-high molecular weight and polyethylene, which is applied in the fields of prosthesis, tissue regeneration, and medical science, and can solve the problems of material performance degradation, difficulty in the diffusion of antioxidants, and time-consuming heat treatment process, etc.

Active Publication Date: 2021-06-01
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the method of irradiation-soaking-diffusion, the diffusion of antioxidants is difficult, mainly distributed on the surface, the content of internal antioxidants is negligible, and the concentration inside and outside is not uniform
Moreover, the heat treatment process takes a long time, and the long-time heat treatment also leads to the degradation of material properties.
However, the internal antioxidant content is too low to eliminate free radicals, and cannot effectively eliminate the free radicals generated during the irradiation process and exert the antioxidant effect in the subsequent use process.

Method used

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  • Ultra-high molecular weight polyethylene plate as well as preparation method and application thereof
  • Ultra-high molecular weight polyethylene plate as well as preparation method and application thereof
  • Ultra-high molecular weight polyethylene plate as well as preparation method and application thereof

Examples

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preparation example Construction

[0026] The invention provides a method for preparing an ultra-high molecular weight polyethylene sheet, comprising the following steps:

[0027] Mix the antioxidant and ultra-high molecular weight polyethylene to obtain a variety of mixed powders with different antioxidant contents;

[0028] The various mixed powders are laminated according to the content of the antioxidant, and then subjected to compression molding, radiation crosslinking and annealing treatment in order to obtain the ultra-high molecular weight polyethylene sheet;

[0029] The laminated layer materials are symmetrically arranged around the central layer;

[0030] After the lamination, the content of the antioxidant in the materials of each layer increases outwards based on the central layer.

[0031] The invention mixes the antioxidant and the ultra-high molecular weight polyethylene to obtain various mixed powders with different contents of the antioxidant. In the present invention, the antioxidant prefer...

Embodiment 1

[0050] 1.8 g of vitamin E and 1800 g of ultra-high molecular weight polyethylene with a molecular weight of 3 million and an average particle size of 90 to 120 μm were ball milled for 50 min at a speed of 100 r / min to obtain a mixed powder with a mass percentage of vitamin E of 0.1%;

[0051] 5.4g of vitamin E and 1800g of ultra-high molecular weight polyethylene with a molecular weight of 3 million and an average particle size of 90 to 120 μm were ball milled for 50 minutes at a speed of 100 r / min to obtain a mixed powder with a mass percentage of vitamin E of 0.3%;

[0052] Spread 900g of mixed powder with a mass percentage of vitamin E of 0.3% in the film cavity of the mold (the size is 250mm*250mm*125mm) as the first layer; spread 1800g of vitamin E on the surface of the first layer The mixed powder with a mass percentage of 0.1% is used as the second layer; 900g of mixed powder with a vitamin E mass percentage of 0.3% is spread on the surface of the second layer as the thi...

Embodiment 2

[0057] 1.2 g of vitamin E and 1200 g of ultra-high molecular weight polyethylene with a molecular weight of 3 million and an average particle size of 90 to 120 μm were ball milled for 40 min at a speed of 200 r / min to obtain a mixed powder with a mass percentage of vitamin E of 0.1%;

[0058] 2.4g of vitamin E and 1200g of ultra-high molecular weight polyethylene with a molecular weight of 3 million and an average particle size of 90-120 μm were ball-milled for 40 minutes at a speed of 200 r / min to obtain a mixed powder with a mass percentage of vitamin E of 0.2%;

[0059] 3.6g of vitamin E and 1200g of ultra-high molecular weight polyethylene with a molecular weight of 3 million and an average particle size of 90-120 μm were ball-milled for 40 minutes at a speed of 200 r / min to obtain a mixed powder with a mass percentage of vitamin E of 0.3%;

[0060] Spread 600g of mixed powder with a vitamin E mass percentage of 0.3% in the film cavity of the mold (the size is 250mm*250mm*1...

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to an ultra-high molecular weight polyethylene plate as well as a preparation method and application thereof. The invention provides a preparation method of an ultra-high molecular weight polyethylene plate, which comprises the following steps: mixing an antioxidant and ultra-high molecular weight polyethylene to obtain a plurality of mixed powder materials with different antioxidant contents; and laminating the mixed powder according to the content of the antioxidant, and sequentially carrying out compression molding, irradiation crosslinking and annealing treatment to obtain the ultra-high molecular weight polyethylene plate. The laminated layer materials are symmetrically arranged by taking the central layer as a center; and the content of the antioxidant in each layer of material after lamination is gradually increased outwards by taking the central layer as a reference. The mixed powder with different antioxidant concentrations is stacked according to the mode that the antioxidant concentrations increase progressively from inside to outside, it is guaranteed that the proportion of the antioxidant content and the irradiation dose of different sample depths in the irradiation process is kept constant, and the ultra-high molecular weight polyethylene plate with the uniform crosslinking density is obtained.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an ultra-high molecular weight polyethylene sheet and its preparation method and application. Background technique [0002] Ultra-high molecular weight polyethylene (polyethylene with a molecular weight of more than 1 million) is a new type of thermoplastic with unparalleled wear resistance, corrosion resistance, impact resistance and self-lubricating properties due to its excellent comprehensive properties. Engineering plastics are widely used in artificial joint replacements. However, during the long-term service of the UHMWPE artificial joint in the body, wear debris produced by friction with its matching materials cannot be absorbed and degraded after being phagocytized by macrophages, resulting in the death of macrophages, and at the same time, abrasion and action-induced osteolysis will occur. Bacterial loosening, inflammation, etc., often require a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/40A61L27/16A61L27/50
CPCA61L27/16A61L27/50A61L2430/24C08L23/06
Inventor 雷巍巍吴克梦施德安
Owner HUBEI UNIV