Ultrahigh molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material as well as preparation method and application thereof

Abstract

The invention relates to an ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material as well as a preparation method and application thereof. The composite material comprises the following raw material components in percentage by weight: 10%-30% of fibers, 70%-90% of high-density polyethylene particles or powder and spherical calcium carbonate powder, the fibers are ultra-high molecular weight polyethylene fibers and carbon fibers, and the weight ratio of the ultra-high molecular weight polyethylene fibers to the carbon fibers is 9: 1-7: 3. The composite material is high in strength, and the bending strength reaches 60 MPa or above. And when being used as an auricle stent, the material has better biological activity and structural stability.

Description

Technical Field

[0001] The invention relates to the technical field of artificial ear support materials, and in particular to an ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material and a preparation method and application thereof. Background Art

[0002] Microtia is a common congenital craniofacial deformity that often requires auricular reconstruction to reconstruct the auricle and / or hearing. Auricular reconstruction surgery is currently the most widely used surgical technique, which uses 6-8 autologous rib cartilages to carve and reconstruct the auricle. This technique can cause pain and discomfort in the donor site and relies on the surgeon's surgical skills to complete a beautiful ear. In addition, the choice of ear stent materials ranges from allogeneic, autologous cartilage, silicone to porous high-density polyethylene. Currently, porous high-density polyethylene is the most widely used artificial substitute material. It can avoid the occurrence of donor site complications such as chest deformity and pneumothorax after cutting the rib cartilage, shorten the operation time, and make up for the shortcomings of long-term absorption and deformation of the rib cartilage. However, the material has low strength, poor biological fusion, and a high infection rate of exposed cartilage.

[0003] Ultra-high molecular weight polyethylene fiber has the characteristics of low density, high specific modulus, high specific strength, chemical corrosion resistance, good wear resistance, good biocompatibility and long flex life, and has broad application prospects in the biomedical field. Carbon fiber has the characteristics of low density, high specific modulus, high specific strength, high specific surface area and good biocompatibility, and has broad application prospects in the biomedical field. Carbon fiber can significantly improve the performance of artificial organs, artificial bones, artificial teeth, and artificial tendons in terms of strength, hardness, and toughness. In addition, the carbon material has good structural stability, which can avoid aging and improve the stability of the implant.

[0004] Therefore, it is necessary to develop a porous high-density polyethylene composite material modified by ultra-high molecular weight polyethylene fiber and carbon fiber. Summary of the invention

[0005] The present invention provides an ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material and a preparation method and application thereof. By adding a certain proportion of ultra-high molecular weight polyethylene fiber and carbon fiber during the preparation of porous high-density polyethylene, the strength of the porous high-density polyethylene can be significantly improved, while the biological activity and stability of the implant material can be improved.

[0006] The present invention provides an ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material, and its raw material components include, by weight percentage: 10%-30% fiber, high-density polyethylene particles or powder, and spherical calcium carbonate powder; the fibers are ultra-high molecular weight polyethylene fibers and carbon fibers, wherein the weight ratio of the ultra-high molecular weight polyethylene fibers to the carbon fibers is 9:1-7:3.

[0007] Preferably, the weight ratio of the high-density polyethylene particles or powder to the spherical calcium carbonate powder is 9:1 to 6:4.

[0008] Preferably, the length of the fiber is 20 to 100 mm.

[0009] The present invention also provides a method for preparing an ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material, comprising the following steps:

[0010] S1. Mix the fibers, high-density polyethylene particles or powder, and spherical calcium carbonate powder by ball milling according to the weight ratio, and form them by molding process at a molding temperature of 50 to 90° C. to obtain the product.

[0011] Preferably, the forming mold is in the shape of a plate or a strip.

[0012] The present invention also provides a 3D ear support implant material, which is prepared by carving the above composite material into the shape of an auricle support.

[0013] Preferably, the preparation method comprises: S2, carving the formed composite material into the shape of an auricle support for standby use; before use, soaking it in dilute hydrochloric acid so that the calcium carbonate therein reacts completely with the dilute hydrochloric acid to form pores at the positions occupied by the spherical calcium carbonate, cleaning and disinfecting, and the result is obtained.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene 3D ear bracket composite material provided by the present invention has high strength and a bending strength of more than 60MPa. It is used as an auricle bracket and has good biological activity and structural stability; the diameter of its pores can be regulated by selecting spherical calcium carbonate powder with different particle sizes. The preparation method is simple and has good application prospects. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is described below in conjunction with specific embodiments.

[0017] Unless otherwise specified, the raw materials, equipment, etc. involved in the present invention are common commercially available products.

[0018] In the present invention, the type of carbon fiber is not limited, and for example, it may be polyacrylonitrile carbon fiber.

[0019] In the present invention, the particle size of the spherical calcium carbonate powder is not limited, and it only needs to meet the use requirements of the 3D ear stent implant material.

[0020] In the present invention, there is no limitation on the particle size of the high-density polyethylene particles or powders, as long as they can be mixed or dispersed evenly with other raw materials.

[0021] Example 1

[0022] The invention discloses an ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material, wherein the raw material components thereof are, by weight percentage, 25% of fibers, 75% of high-density polyethylene particles or powders and spherical calcium carbonate powders; the fibers are ultra-high molecular weight polyethylene fibers and carbon fibers, wherein the weight ratio of the ultra-high molecular weight polyethylene fibers to the carbon fibers is 7.5:2.5.

[0023] Wherein, the weight ratio of the high-density polyethylene particles or powder to the spherical calcium carbonate powder is 8:2.

[0024] The ultra-high molecular weight polyethylene fibers are chopped into a length of 20 to 40 mm, and the polyacrylonitrile carbon fibers are chopped into a length of 50 to 60 mm.

[0025] The preparation method is:

[0026] S1. Mix the fibers, high-density polyethylene particles or powder, and spherical calcium carbonate powder by ball milling according to the weight ratio, and form them by molding process. The molding temperature is 80±5°C, and the molding mold is a plate-shaped mold.

[0027] S2. Carve the formed material into the shape of an auricle stent for later use; before use, soak it in dilute hydrochloric acid to allow the calcium carbonate therein to react completely with the dilute hydrochloric acid, forming pores at the positions occupied by the spherical calcium carbonate, and then clean and disinfect it to obtain a 3D ear stent implant material.

[0028] The flexural strength of the obtained implant material is 67 MPa.

[0029] Example 2

[0030] The invention discloses an ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material, wherein the raw material components thereof are, by weight percentage, 30% of fibers, 70% of high-density polyethylene particles or powders and spherical calcium carbonate powders; the fibers are ultra-high molecular weight polyethylene fibers and carbon fibers, wherein the weight ratio of the ultra-high molecular weight polyethylene fibers to the carbon fibers is 7:3.

[0031] Wherein, the weight ratio of the high-density polyethylene particles or powder to the spherical calcium carbonate powder is 9:1.

[0032] The ultra-high molecular weight polyethylene fibers are chopped into a length of 10 to 30 mm, and the polyacrylonitrile carbon fibers are chopped into a length of 50 to 60 mm.

[0033] Its preparation method is:

[0034] S1. Mix the fibers, high-density polyethylene particles or powder, and spherical calcium carbonate powder by ball milling according to the weight ratio, and form them by molding process. The molding temperature is 55±5°C, and the molding mold is a plate-shaped mold.

[0035] S2. Carve the formed material into the shape of an auricle stent for later use; soak it in dilute hydrochloric acid before use to allow the calcium carbonate therein to react completely with the dilute hydrochloric acid to form pores at the positions occupied by the spherical calcium carbonate, clean and disinfect it, and obtain a 3D ear stent implant material.

[0036] The flexural strength of the obtained implant material is 66 MPa.

[0037] Example 3

[0038] The invention discloses an ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material, wherein the raw material components thereof are, by weight percentage, 10% of fiber, 90% of high-density polyethylene particles or powder and spherical calcium carbonate powder; the fiber is ultra-high molecular weight polyethylene fiber and carbon fiber, wherein the weight ratio of the ultra-high molecular weight polyethylene fiber to the carbon fiber is 9:1.

[0039] Wherein, the weight ratio of the high-density polyethylene particles or powder to the spherical calcium carbonate powder is 6:4.

[0040] The ultra-high molecular weight polyethylene fibers are chopped into a length of 40 to 60 mm, and the polyacrylonitrile carbon fibers are chopped into a length of 80 to 100 mm.

[0041] Its preparation method is:

[0042] S1. Mix the fibers, high-density polyethylene particles or powder, and spherical calcium carbonate powder by ball milling according to the weight ratio, and form them by molding process at a molding temperature of 85±5°C. The molding mold is a plate-shaped mold;

[0043] S2. Carve the formed material into the shape of an auricle stent for later use; soak it in dilute hydrochloric acid before use to allow the calcium carbonate therein to react completely with the dilute hydrochloric acid to form pores at the positions occupied by the spherical calcium carbonate, clean and disinfect it, and obtain a 3D ear stent implant material.

[0044] The flexural strength of the obtained implant material is 65 MPa.

[0045] Comparative Example 1

[0046] The fiber is not included, and the rest is the same as in Example 1. The bending strength is 33-35 MPa.

[0047] Comparative Example 2

[0048] The ultra-high molecular weight polyethylene fiber is not included, and the rest is the same as in Example 1. The flexural strength is 36-40 MPa.

[0049] Comparative Example 3

[0050] The carbon fiber is not included, and the rest is the same as in Example 1. The bending strength is 46-50 MPa.

[0051] Comparative Example 4

[0052] The fiber content is 40%, and the rest is the same as in Example 1. The bending strength is 65-70 MPa.

[0053] Comparative Example 5

[0054] The weight ratio of ultra-high molecular weight polyethylene fiber to carbon fiber is 1:1, and the rest is the same as in Example 1. The bending strength is 73-78 MPa.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the principle and scope of the technical solution of the present invention.

Claims

1. An ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material, characterized in that: The raw material components include, by weight percentage: 10%-30% fiber, 70%-90% high-density polyethylene particles or powder and spherical calcium carbonate powder; the fiber is ultra-high molecular weight polyethylene fiber and carbon fiber, wherein the weight ratio of the ultra-high molecular weight polyethylene fiber to the carbon fiber is 9:1 to 7:

3.

2. The composite material according to claim 1, characterized in that The weight ratio of the high-density polyethylene particles or powder to the spherical calcium carbonate powder is 9:1 to 6:

4.

3. The composite material according to claim 1, characterized in that The length of the fiber is 20 to 100 mm.

4. The method for preparing the ultra-high molecular weight polyethylene fiber / carbon fiber reinforced porous high-density polyethylene composite material according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Mix the fibers, high-density polyethylene particles or powder, and spherical calcium carbonate powder by ball milling according to the weight ratio, and form them by molding process at a molding temperature of 50 to 90° C. to obtain the product.

5. The preparation method according to claim 4, characterized in that: The weight ratio of the high-density polyethylene particles or powder to the spherical calcium carbonate powder is 9:1 to 6:

4.

6. The preparation method according to claim 4, characterized in that: The length of the fiber is 20 to 100 mm.

7. The preparation method according to claim 4, characterized in that: The molding mold is in any one of a plate shape or a strip shape.

8. A 3D ear support implant material, made from the composite material according to any one of claims 1 to 3.

9. The 3D ear support implant material according to claim 8, characterized in that: The preparation method comprises: S2, carving the formed composite material into the shape of an auricle support for use; before use, soaking it in dilute hydrochloric acid to make the calcium carbonate therein react completely with the dilute hydrochloric acid to form pores at the position occupied by the spherical calcium carbonate, cleaning and disinfecting, and the composite material is obtained.