CN213883674U - Carbon fiber/carbon composite material T-shaped artificial rib connecting piece - Google Patents
Carbon fiber/carbon composite material T-shaped artificial rib connecting piece Download PDFInfo
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- CN213883674U CN213883674U CN202022160817.9U CN202022160817U CN213883674U CN 213883674 U CN213883674 U CN 213883674U CN 202022160817 U CN202022160817 U CN 202022160817U CN 213883674 U CN213883674 U CN 213883674U
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Abstract
The utility model discloses a carbon fiber/carbon composite material T-shaped artificial rib connecting piece, which consists of a breastbone connecting end and ribs; the sternum connecting end is of a sheet structure, and the ribs are of arc-shaped belt structures; one end of each rib is perpendicular to the surface of the sternum connecting end to form a T-shaped structure; the sternum connecting end and the ribs are both formed by a carbon fiber/carbon composite material substrate and a carbon coating on the surface of the carbon fiber/carbon composite material substrate. A large number of gaps exist in the artificial rib connecting piece material, autologous tissue attachment is facilitated, biocompatibility is good, surface hardness is high, friction coefficient is small, the artificial rib connecting piece material is not easy to damage, carbon-based particles can be blocked from falling off, the skin blackening effect is avoided, the rigid connecting end and the flexible end are effectively transited due to the structural design, and the function of cartilage is embodied in biomechanics.
Description
Technical Field
The utility model relates to a T-shaped artificial rib connecting piece, in particular to a T-shaped artificial rib connecting piece composed of carbon fiber/carbon composite material, belonging to the technical field of bionic materials.
Background
The excision of rib bones and cartilage at the sternal ends caused by tumor and trauma requires sternal reconstruction in order to maintain the integrity and function of the chest wall. The common replacement in the prior art is metal materials such as titanium, titanium alloy, nickel-titanium alloy, stainless steel and the like, which not only has the problems of poor compatibility of mechanical properties and autogenous bones, implant loosening or dislocation, local osteoporosis, bone resorption, fracture, delayed bone healing and the like, but also mostly adopts a covering lap joint mode, and inevitably influences morphological repair. The carbon material has good biocompatibility and can be applied to various fields of biomedicine, but related reports of successfully designing and preparing the artificial rib butted with the lateral side of the sternum by adopting the carbon material are not found in the prior art.
SUMMERY OF THE UTILITY MODEL
The material of selecting to artifical rib joint spare among the prior art and the defect that the design of structure exists, the utility model aims at providing an artifical rib joint spare that biocompatibility is good, biomechanics performance is excellent, there is a large amount of spaces in the inside of this artifical rib joint spare material to be favorable to autologous tissue to adhere to, biocompatibility is good, surface layer hardness is high, coefficient of friction is little, not only difficult damaged, and can block droing of carbon back granule, avoid the black skin effect, and the design of structure has realized that rigid link end and flexible end are effective to be passed through, embodied the function of cartilage on biomechanics.
In order to achieve the technical purpose, the utility model provides a carbon fiber/carbon composite material T-shaped artificial rib connecting piece, which consists of a breastbone connecting end and a rib; the sternum connecting end is of a sheet structure, and the ribs are of arc-shaped belt structures; one end of each rib is perpendicular to the surface of the sternum connecting end to form a T-shaped structure; the sternum connecting end and the ribs are both formed by a carbon fiber/carbon composite material substrate and a carbon coating on the surface of the carbon fiber/carbon composite material substrate.
Preferably, the sternum attachment end and the ribs are of a unitary structure. The integral forming structure of the sternum connecting end and the ribs reduces the overlapping fixing points between the structures, is favorable for improving the stability of the structure and better exerts the biomechanical property of the structure.
Preferably, the sternum connecting end and the surface of the rib are provided with fixing holes. The fixing holes on the surface of the sternum connecting end are mainly used for connecting and fixing with the sternum, and the fixing holes on the surface of the ribs are mainly used for connecting and fixing with tissues.
Preferably, the size of the hole diameter of the fixing hole is 0.5mm to 3.0 mm.
Preferably, the carbon fiber/carbon composite material matrix is composed of a carbon fiber fabric and a carbon material inside the carbon fiber fabric (the carbon material is distributed on the surface of the carbon fibers and filled between the carbon fibers).
Preferably, the weave of the carbon fiber fabric of the sternum connecting end is in a chain shape or a V-shaped weave. The sheet-like structure woven in a chain or V-pattern mainly exhibits rigidity.
Preferably, the weave of the carbon fiber fabric of the rib is in a twill shape. The strip structure woven in twill form mainly exhibits flexibility.
As a preferred aspect, the carbon coating is a pyrolytic carbon coating or/and a diamond-like coating. The pyrolytic carbon coating or/and the diamond-like carbon coating on the surface layer have the characteristics of high hardness and small friction coefficient, are not easy to damage, and can block the falling of the inner-layer carbon-based particles to avoid the black skin effect.
The utility model provides a pair of carbon fiber/carbon composite material T shape artificial rib connecting piece is obtained by following preparation method:
1) weaving a plurality of carbon fibers (such as 1k (k represents one thousand), 1.5k, 3k, 6k, 12k and … …) into a T-shaped carbon fiber prefabricated body, wherein the connecting ends are woven into a chain-shaped or V-shaped pattern, the rib areas are woven into a twill pattern, and then the carbon fiber prefabricated body of the T-shaped artificial rib connecting piece is manufactured by the aid of a mold;
2) the carbon fiber prefabricated body is densified through chemical vapor infiltration and/or liquid impregnation to prepare a needed carbon fiber/carbon composite material T-shaped artificial rib connecting piece blank; the process of densifying matrix carbon by chemical vapor deposition comprises the following steps: placing the carbon fiber preform in a deposition furnace, and introducing a carbon-containing gas source (natural gas and the like) at the temperature of 850-1300 ℃ for deposition for 20-200 h; the process of impregnating-cracking densified matrix carbon comprises the following steps: sequentially carrying out resin (epoxy resin and the like) or asphalt vacuum pressurization impregnation, curing and cracking treatment on the carbon fiber preform; the dipping pressure is 1.0MPa to 5.0MPa, and the dipping time is 2h to 10 h; the curing temperature is 160-230 ℃, and the curing time is 10-50 h; the cracking temperature of the resin is 900-1050 ℃, the pressure is normal pressure, and the cracking time is 2-20 h; the cracking temperature of the asphalt is 750-850 ℃, the pressure is 50-200 MPa, and the cracking time is 2-20 h;
3) machining including end cutting or fixed hole machining and the like, wherein the aperture is 0.5-3.0 mm, the fixed hole can be reserved in the preparation process of the carbon fiber preform, and the mechanical property reduction caused by damage to the carbon fiber/carbon composite material T-shaped artificial rib connecting piece due to removal in later-stage machining can be effectively avoided;
4) putting the machined blank into a high-temperature furnace, heating under the condition of vacuum or protective atmosphere to remove impurities (the step can be adopted or not adopted according to the requirement), wherein the high-temperature treatment condition is as follows: keeping the temperature at 1500-2300 ℃ for 1-10 h;
5) preparing a pyrolytic carbon coating or/and a diamond-like carbon coating on the surface of the blank to obtain the T-shaped artificial rib connecting piece; the pyrolytic carbon coating is generated by chemical vapor deposition, and the generation conditions are as follows: depositing a gas carbon source (such as natural gas, methane and other common gas carbon sources) at 900-1500 ℃ for 10-50 h; the diamond-like coating is generated by magnetron sputtering, and the generation conditions are as follows: vacuum degree of 1X 10-1Pa～5×10-1Pa; the negative bias voltage of the workpiece is 10V-200V; ar flow is 50 sccm-120 sccm; graphite target power: 1kW to 3kW, and the purity is not lower than 99.99 wt%; the heating temperature is 80-200 ℃; the deposition time is 10min to 180 min; alternatively, the diamond-like coating is generated by plasma enhanced chemical vapor deposition under the conditions: vacuum degree of 1X 10-1Pa～5×10-1Pa; the negative bias voltage of the workpiece is 10V-200V; ar flow is 50 sccm-120 sccm; the power of the ion source is 0.5 kW-5 kW; hydrocarbon gas (e.g. CH)4、C2H2Etc.) the flow rate is 10sccm to 500 sccm; the heating temperature is 80-300 ℃; the deposition time is 10 min-180 min.
The utility model provides a carbon fiber/carbon composite material T shape artificial rib connecting piece mainly is used for leading to rib and sternum end cartilage's excision to go on the rib repair because of tumour, traumatism, and T shape artificial rib connecting piece's sternum link is mainly used for fixing on the sternum, and its link has the rigidity of similar sternum, and the rib has the flexibility, can exert cartilage's biomechanics function well.
Compared with the prior art, the utility model discloses the beneficial technological effect who brings:
1) the utility model provides a artifical rib joint piece of carbon fiber/carbon composite T shape constitutes with carbon fiber/carbon composite, and there is a large amount of spaces in inside and is favorable to autologous tissue to adhere to, and biocompatibility is good.
2) The utility model provides a carbon fiber/carbon composite material T shape artificial rib connecting piece has realized that rigidity link and flexible end are effective to be passed through, has embodied the function of cartilage on biomechanics, for the structural design who is more close human cartilage.
3) The utility model provides a carbon fiber/carbon composite material T shape artificial rib connecting piece top layer hardness is high, and coefficient of friction is little, not only is difficult damaged, can block droing of carbon back granule moreover, avoids the black skin effect.
4) The utility model provides a carbon fiber/carbon composite material T shape artificial rib connecting piece biomechanics nature is better, and the flexural modulus of sternum link is 10GPa ~ 20GPa, and the tensile strength of artificial rib is greater than 90MPa, and the tensile modulus is 3GPa ~ 10GPa, and flexural modulus is 1GPa ~ 3 GPa.
Drawings
FIG. 1 is a front view of a carbon fiber/carbon composite T-shaped artificial rib joint;
FIG. 2 is a right side view of a carbon fiber/carbon composite T-shaped artificial rib joint;
FIG. 3 is a top view of a carbon fiber/carbon composite T-shaped artificial rib joint;
FIG. 4 shows a chain-shaped or V-shaped carbon fiber fabric forming the connecting end and a twill-shaped carbon fiber fabric forming the ribs;
FIG. 5 is a schematic cross-sectional view of a carbon fiber woven twill rib;
the carbon fiber/carbon composite material comprises a carbon coating, a fixing hole 1, ribs 2, a connecting end 3, a carbon fiber/carbon composite material substrate 4, a carbon coating 5, a V-shaped carbon fiber fabric a, a chain-shaped carbon fiber fabric b and a twill-shaped carbon fiber fabric c.
Detailed Description
The following embodiments are further intended to specifically describe the present invention with reference to the attached drawings, and the protection scope of the present invention is not limited by the embodiments.
The carbon fiber/carbon composite material T-shaped artificial rib connecting piece provided by the embodiment is specifically shown in figures 1-5. The T-shaped artificial rib connecting piece main body part is composed of a sternum connecting end 3 and ribs 1, an integral structure is formed between the sternum connecting end and the ribs, and the sternum connecting end is an end face connected with a sternum. The sternum connecting end is of a sheet structure, the specific shape can be a rectangular regular geometric shape, and the size is designed according to actual needs. The ribs are arc-shaped strip structures, and the size and shape of the ribs are similar to the real situation of the human ribs. One end of each rib is perpendicular to the surface of the sheet structure of the sternum connecting end to form a T-shaped structure, fixing holes are uniformly distributed on the surface of the sheet structure of the sternum connecting end and the surface of the belt structure of the rib, the number of the fixing holes is determined according to practical application requirements, the fixing can be realized, the aperture of each fixing hole is about 1.5mm, and the fixing device is mainly used for fixing the T-shaped artificial rib connecting piece on human tissues and frameworks. The sternum connecting ends and the ribs are made of a carbon fiber/carbon composite material matrix 4 and a carbon coating 5 on the surface of the carbon fiber/carbon composite material matrix, specifically, a carbon fiber fabric is used as a main body material, a carbon source is cracked and filled in the carbon fiber fabric, and a pyrolytic carbon or diamond-like carbon coating is generated on the surface of the carbon fiber fabric by using methods such as chemical vapor deposition or magnetron sputtering. The sternum connecting end mainly shows rigidity, so the V-shaped carbon fiber fabric a or the chain-shaped carbon fiber fabric b is mainly used as the connecting end, and the cartilage flexibility is mainly shown as the rib, so the twill-shaped carbon fiber fabric c is mainly used as the rib.
Claims (8)
1. A carbon fiber/carbon composite material T-shaped artificial rib connecting piece is characterized in that: is composed of a sternum connecting end and ribs; the sternum connecting end is of a sheet structure, and the ribs are of arc-shaped belt structures; one end of each rib is perpendicular to the surface of the sternum connecting end to form a T-shaped structure; the sternum connecting end and the ribs are both formed by a carbon fiber/carbon composite material substrate and a carbon coating on the surface of the carbon fiber/carbon composite material substrate.
2. The carbon fiber/carbon composite T-shaped artificial rib joint according to claim 1, wherein: the sternum connecting end and the ribs are of an integrated structure.
3. The carbon fiber/carbon composite T-shaped artificial rib joint according to claim 1, wherein: and fixing holes are formed in the sternum connecting end and the surfaces of the ribs.
4. The carbon fiber/carbon composite T-shaped artificial rib joint according to claim 3, wherein: the aperture size of the fixed hole is 0.5 mm-3.0 mm.
5. The carbon fiber/carbon composite T-shaped artificial rib joint according to claim 1, wherein: the carbon fiber/carbon composite material matrix is composed of carbon fiber fabrics and carbon materials in the carbon fiber fabrics.
6. The carbon fiber/carbon composite T-shaped artificial rib joint according to claim 5, wherein: the weave of the carbon fiber fabric at the sternum connecting end is in a chain strip shape or a V-shaped weave.
7. The carbon fiber/carbon composite T-shaped artificial rib joint according to claim 5, wherein: the weave of the carbon fiber fabric of the ribs is in a twill pattern shape.
8. The carbon fiber/carbon composite T-shaped artificial rib joint according to claim 1, wherein: the carbon coating is a pyrolytic carbon coating or/and a diamond-like carbon coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022160817.9U CN213883674U (en) | 2020-09-28 | 2020-09-28 | Carbon fiber/carbon composite material T-shaped artificial rib connecting piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022160817.9U CN213883674U (en) | 2020-09-28 | 2020-09-28 | Carbon fiber/carbon composite material T-shaped artificial rib connecting piece |
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| CN213883674U true CN213883674U (en) | 2021-08-06 |
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| CN202022160817.9U Active CN213883674U (en) | 2020-09-28 | 2020-09-28 | Carbon fiber/carbon composite material T-shaped artificial rib connecting piece |
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