CN1232472C - Process for preparing self-growing calcium phosphate crystal whisker strengthened porous bioceramic materials - Google Patents
Process for preparing self-growing calcium phosphate crystal whisker strengthened porous bioceramic materials Download PDFInfo
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- CN1232472C CN1232472C CN 200310107578 CN200310107578A CN1232472C CN 1232472 C CN1232472 C CN 1232472C CN 200310107578 CN200310107578 CN 200310107578 CN 200310107578 A CN200310107578 A CN 200310107578A CN 1232472 C CN1232472 C CN 1232472C
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- calcium phosphate
- ionic compound
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Abstract
The present invention discloses a method for making a tough porous biological ceramic material with self-growing calcium phosphate crystal whiskers, which belongs to techniques for making biological ceramics. The method of the present invention comprises: beta-calcium phosphate or hydroxyapatite powder, a complex-phase additive, zirconium oxide and adhesive are used as raw materials; the complex-phase additive is made, slurry is prepared and formed, and a blank is presintered and sintered to make the tough porous biological ceramic material with self-growing calcium phosphate crystal whiskers. The porosity of the porous beta-calcium phosphate composite ceramics and the beta-calcium phosphate / zirconium oxide composite ceramics made by the method of the present invention is from 80 to 94%, the pore diameter is from 50 to 650 nm, the pores are uniformly distributed, the compressive strength of the ceramic material is from 1.5 to 16MPa, and the ratio of the length to the diameter of the self-growing calcium phosphate crystal whiskers in the substrate is from about 4 to 7:1.
Description
Technical field
The present invention relates to a kind of tough porous bio-ceramic preparation methods of calcium phosphate whisker of growing certainly, belong to the biological ceramics preparing technical field.
Background technology
Bone renovating material has been widely used in Orthopeadic Surgery, plastic surgery and dental field.Only the damaged patient of China's bone just has millions of examples every year.It with the series of calcium phosphate inorganic bio of representative enjoys medical circle because of its excellent biological compatibility and degradable concern.Aspect clinical application, except the mineral constituent of considering material be repaired part identical, the structure of material and biomechanical property will directly influence its clinical application.As the carrier bracket of particular organization's cell, must be porous material with high porosity.In order to satisfy growing into of human body different tissues, the minimum-value aperture of porous support must be greater than 50 μ m, when the aperture is 50 μ m, reticular tissue can be grown into, and when having only the aperture greater than 100 μ m, osteocyte can be grown in the hole, form vascularity and secular biological, if will make the bone conduction growth, the aperture must be greater than 200 μ m, and optimal pore diameter range is between 300～400 μ m.In recent years,, often utilize porous, degradable biological rack bearing cell, make it to make up the active carrier that contains gene information, reach the purpose of repairing osseous tissue by implant into body along with the development of organizational project.
The ultimate compression strength of porous biomaterial is one of important performance indexes of its clinical application, and the high compressive strength of the series of calcium phosphate porous material of having reported at present is 0.3～3.3MPa, also is not enough to satisfy requirements for clinical application.High porosity and low intensive contradiction are the main reasons that the restriction porous ceramics is used.Use for reference the high-performance ceramic strengthening and toughening mechanism of, the present invention is toughened and reinforced from growing by whisker, prepares high performance porous bioceramic scaffold.
The patent of relevant porous bio-ceramic technology of preparing is a lot, as the patent that adopts foaming and collosol and gel technology to prepare porous calcium phosphate has US6521246, JP2003089586 and GB2365423 etc., in the porous material that adopts this method to prepare part holes being arranged is closed pore, be unfavorable for the infiltration of tissue juice and growing into of blood vessel, its porosity is 35～65%.Adding pore-creating agent also is one of method for preparing porous bio-ceramic, as (Chinese patent application number: be raw material 03115941.9) such as Lin Kaili of Shanghai Silicate Inst., Chinese Academy of Sciences with Calucium Silicate powder and calcium phosphate powder, mix by mass ratio, and add organic pore-creating agent, through mixing dry-pressing, the gel moldings formed therefrom makes base substrate, with base substrate 900～1200 ℃ of sintering 1～5 hour, prepared biological activity, degradable, porosity is at porous calcium silicate/calcium phosphate composite material of 40～85%, pore size distribution is 50～600 μ m, and ultimate compression strength is 2～80MPa.Because pore-creating agent is difficult to be evenly distributed in the inorganic base substrate, therefore adopt the prepared porous ceramics of pore-creating agent method, pore distribution is inhomogeneous, and porosity is difficult to reach more than 90%.
The preparation porosity is up to more than 90%, and the main method with porous ceramics of through macropore is the foraminous die plate method, promptly is foraminous die plate with the organic foam, by flooding inorganic slip moulding.Preparation technology to different slip systems has carried out studying in great detail both at home and abroad.As the United States Patent (USP) 6605648,6527810 of people such as Johnson application and 6296667 etc.Wherein to have introduced with the foam be skeleton to patent 6605648, with pottery or metal sluny impregnation foam, remove unnecessary slip again, drying, calcining, organic foam is burnt, and can obtain the aperture is the porous ceramics support of 50～1000 μ m, and the ceramics bracket composition can be aluminum oxide, zirconium white or calcium phosphate, with and complex group become, the brace aperture rate can reach 90%.
Foraminous die plate method (as organic foaming process) is one of effective ways of preparation high porosity bioceramic scaffold, but high porosity and low intensive contradiction are still the subject matter that influences this material clinical application, on the basis that guarantees high porosity, adopt crystal whisker toughened reinforcement can effectively improve the biomechanical property of porous material for this reason.U.S. Pat 5204319 and US5091344 have introduced respectively by add SiC or Si in Calcium Phosphate System
3N
4Whisker is prepared crystal whisker toughened porous ceramics by atmosphere sintering, and the intensity of material and toughness all have the raising of certain amplitude.Patent US6248392, JP11209107 and EP0849239 adopt chemical Vapor deposition process to prepare the biological ceramics of phosphoric acid calcium pyroborate.Japanese Patent JP2064067, JP2051475 and JP2044074 have introduced the preparation method of the crystal whisker toughened pottery with high-compactness; Be about to phosphate powder and heat-resisting inorganic materials whisker such as SiC, through wet mixing, premolding, again phosphatic solution is injected in the premolding base substrate, dry back obtains molding blank, base substrate is in calcining more than 600 ℃, can obtain whisker and be evenly distributed, the composite ceramics of compact crystal whisker toughened calcium phosphate matrix.Owing to adopt the mode add whisker, the homodisperse of whisker, with matrix interface combine closely and whisker hinders the existence of the problems such as densification of blapharoplast, cause crystal whisker toughened DeGrain.Above-mentioned patent is by adding whisker and prepares the method for porous or fine and close biological ceramics.
Summary of the invention
The object of the present invention is to provide a kind of preparation method from the tough porous ceramic film material of calcium phosphate whisker of growing, porous bio-ceramic material according to this method preparation, porosity height not only, and has higher mechanical property, the porous bio-ceramic of can be used for that osseous tissue is damaged, reparation and cell in vitro being cultivated support and drug release carrier etc.
The present invention is realized by the following technical programs, is raw material to comprise beta-calcium phosphate or hydroxyapatite powder, complex phase additive, zirconium white and tackiness agent; Comprise configuration, the moulding of preparation through the complex phase additive, slip, the pre-burning and the sintering process of base substrate, preparation is characterized in that from the preparation method of the tough porous ceramic film material of calcium phosphate whisker of growing:
1. NaF, KF or the CaF to contain F ionic compound
2With contain Na, Ca, Mg, Si, at least two kinds of compounds mix in the Bi ionic compound, the described Na of containing ionic compound is Na
2O or Na
2SiO
3, containing Ca ionic compound is CaO, CaCO
3Or Ca (OH)
2, containing Mg ionic compound is MgO, MgCO
3Or Mg (OH)
2, containing Si ionic compound is SiO
2, Na
2SiO
3Or H
2SiO
3, containing Bi ionic compound is Bi
2O
3The mass percent that the F ion accounts in the mixture is 0.2～3%, other ionic mol ratio is Na/Ca/Mg/Si/Bi=(0～2)/(0～3)/(0～1.5)/(0～1)/(0～0.5), and mixture makes the complex phase additive in 900～1040 ℃ of calcinings 1-2 hour.
2. with CaCO
3And CaHPO
42H
2O is a raw material, make respectively in the beta-calcium phosphate or hydroxyapatite powder that median size is 380nm and 300nm by solid reaction process and mechanical-chemical hybrid system, the complex phase additive that adds 1～2wt% mixes the back and in 700～800 ℃ of calcinings, obtains composite ceramic powder through ball milling; Maybe this composite ceramic powder is pressed (5～30): (95～70) mass ratio joins in the Zirconium oxide powder that particle diameter is 0.2～1.0 μ m, and making with the zirconium white is the composite ceramic of matrix.
3. be to add the ammonium polyacrylate dispersion agent of 0.6～1.2wt% and the poly (vinyl alcohol) binder of 0.5～1.0wt% in the composite ceramic of matrix at above-mentioned composite ceramic or with the zirconium white, make solid load and be 50～65% slip, mixed 3～6 hours through ball milling, urethane or polyethers foraminous die plate with moulding immerses in the ceramic slurry then, the dipping body is dried to base substrate, base substrate again in 1200～1450 ℃ of sintering 2～4 hours, obtains after the cooling from growing the tough porous ceramic film material of calcium phosphate whisker after 550～800 ℃ of pre-burnings.
The porous beta-calcium phosphate of present method preparation, the porosity of beta-calcium phosphate/zirconia composite ceramics is 80～94%, and pore diameter range is 50～650 μ m, and pore distribution is even.The ultimate compression strength of material is at 1.5～16MPa, and the length-to-diameter ratio from the calcium phosphate whisker of growing in the matrix is about 4～7.
Description of drawings
The electromicroscopic photograph of tough porous zirconia/hydroxyapatite composite ceramics that Fig. 1 makes for the embodiment of the invention 2;
Among Fig. 2 Fig. 1 on the stupalith hole wall from growing the electromicroscopic photograph of whisker.
Embodiment
Embodiment 1: the beta-calcium phosphate porous ceramics
Raw material: with medical grade lime carbonate (CaCO
3) and dicalcium phosphate dihydrate (CaHPO
42H
2O) be raw material, by the Ca/P mol ratio be 1.5 accurately take by weighing 171.1 the gram CaHPO
42H
2O) and 50.0 the gram CaCO
3, institute's weighing is poured in the ball grinder, add deionized water and zirconium oxide balls.By material: abrading-ball: water is to carry out proportioning at 1: 3: 2.2 by mass ratio, with compound high speed ball milling 16 hours in baking oven in 85 ℃ of freeze-day with constant temperature, dry back is 830 ℃ of calcinings, obtaining median size is beta-calcium phosphate powder 154.9 grams of 380nm.
Technology: with SiO
2, Na
2O and CaF
2Be to take by weighing the mixed powders that gross weight is 50 grams at 2: 1: 4 in molar ratio, with powder in calcining furnace in 960 ℃ of pre-burnings, be incubated 1.5 hours; After the cooling that the frit ball mill pulverizing is standby.Take by weighing 55 gram beta-calcium phosphate powder, and add the above-mentioned complex phase additive of 1.1 grams; Measure 45 ml deionized water, in deionized water, add 0.27 gram poly (vinyl alcohol) binder, and add 0.55 gram ammonium polyacrylate; Beta-calcium phosphate, complex phase additive are distributed in the deionized water that contains binding agent, and mix grinding is 3 hours on the particle sphere grinding machine, and abrading-ball is an agate ball; Slip after grinding is poured in the charge groove, polyurethane sponge is immersed in the slip, the sponge that will be soaked with slip is then taken out, and by muller the unnecessary slip in the sponge is ground; The sponge formed body that is wrapped up by slip is after drying at room temperature 12 hours, and is dry in baking oven again; The pre-burning in sintering oven of dry sample, heating schedule is: room temperature to 180 ℃ is 2 ℃/minute, and 120～400 ℃ is 0.8 ℃/minute, and 400～600 ℃ is 1.2 ℃/minute; The pre-burning sample directly is warming up to 1200 ℃, and heat-up rate is 3 ℃/minute, is incubated 4 hours, can obtain porosity and be 85% porous ceramics, and pore size is between 150～600 μ m.
Embodiment 2: zirconium white/10wt% beta-calcium phosphate porous ceramics
Raw material: with medical grade lime carbonate (CaCO
3) and dicalcium phosphate dihydrate (CaHPO
42H
2O) being raw material, is 1.67 accurately to take by weighing 342.2 gram dicalcium phosphate dihydrate (CaHPO by the Ca/P mol ratio
42H
2O) and 134 gram lime carbonate (CaCO
3), institute's weighing is poured in the ball grinder, add deionized water and zirconium oxide balls.By material: abrading-ball: the mass ratio of water was to carry out proportioning at 1: 3: 2.2, with compound high speed ball milling 24 hours.In 85 ℃ of freeze-day with constant temperature, dry back is 740 ℃ of calcinings in baking oven, and obtaining median size is hydroxyapatite powder 309.9 grams of 300nm.
Technology: with Na
2SiO
3, MgCO
3, CaF
2Be to take by weighing the mixed powders that gross weight is 50 grams at 1: 2: 2 in molar ratio, with mixed powder in calcining furnace in 1040 ℃ of pre-burnings, be incubated 0.5 hour; After the cooling that the frit ball mill pulverizing is standby.1.26 gram composite additives are added in the above-mentioned hydroxyapatite powder, mix the back 720 ℃ of calcinings 1 hour.Take by weighing 90 gram Zirconium oxide powders (the inferior hi-tech of Jiujiang Pan American Materials Co., Ltd) and 19.7 and restrain the hydroxyapatite powder that contains the complex phase additive, measure 90 ml deionized water, in deionized water, add 0.6 gram poly (vinyl alcohol) binder, 1.1 gram ammonium polyacrylates; Composite powder is poured in the deionized water, and mix grinding is 4 hours on the particle sphere grinding machine, and abrading-ball is a zirconia ball; Slip behind the mix grinding is poured in the charge groove, and the polyurethane sponge after handling with alkali lye is immersed in the slip, and the sponge that then will be soaked with slip is taken out, and by muller the unnecessary slip in the sponge is ground; The sponge formed body that is wrapped up by slip is after drying at room temperature 12 hours, and is dry in baking oven again; The pre-burning in sintering oven of dry sample, heating schedule is: room temperature to 180 ℃ is 2 ℃/minute, and 180～400 ℃ is 1 ℃/minute, and 400～600 ℃ is 1.2 ℃/minute; The pre-burning sample is warming up to 1200 ℃, and heat-up rate is 3 ℃/minute, and is incubated 4 hours, continues to be warming up to 1350 ℃ again, and heat-up rate is 1.6 ℃/minute, is incubated 2 hours, can make porosity and be 93% porous ceramics, and pore size is between 50～500 μ m.
Claims (1)
1, a kind of from the tough porous bio-ceramic preparation methods of calcium phosphate whisker of growing, this method comprises configuration, the moulding of preparation, the slip of complex phase additive, the pre-burning and the sintering process of base substrate, it is characterized in that:
1) NaF, KF or the CaF to contain F ionic compound
2With contain Na, Ca, Mg, Si, at least two kinds of compounds mix in the Bi ionic compound, the described Na of containing ionic compound is Na
2O or Na
2SiO
3, containing Ca ionic compound is CaO, CaCO
3Or Ca (OH)
2, containing Mg ionic compound is MgO, MgCO
3Or Mg (OH)
2, containing Si ionic compound is SiO
2, Na
2SiO
3Or H
2SiO
3, containing Bi ionic compound is Bi
2O
3The mass percent that the F ion accounts in the mixture is 0.2～3%, other ionic mol ratio is Na/Ca/Mg/Si/Bi=(0～2)/(0～3)/(0～1.5)/(0～1)/(0～0.5), and mixture makes the complex phase additive in 900～1040 ℃ of calcinings 1-2 hour;
2) with CaCO
3And CaHPO
42H
2O is a raw material, make respectively in the beta-calcium phosphate or hydroxyapatite powder that median size is 380nm and 300nm by solid reaction process and mechanical-chemical hybrid system, the complex phase additive that adds 1～2wt% mixes the back and in 700～800 ℃ of calcinings, obtains composite ceramic powder through ball milling; Maybe this composite ceramic powder is pressed (5～30): (95～70) mass ratio joins in the Zirconium oxide powder that particle diameter is 0.2～1.0 μ m, and making with the zirconium white is the composite ceramic of matrix;
3) be to add the ammonium polyacrylate dispersion agent of 0.6～1.2wt% and the poly (vinyl alcohol) binder of 0.5～1.0wt% in the composite ceramic of matrix at above-mentioned composite ceramic or with the zirconium white, make solid load and be 50～65% slip, mixed 3～6 hours through ball milling, urethane or polyethers foraminous die plate with moulding immerses in the ceramic slurry then, the dipping body is dried to base substrate, base substrate again in 1200～1450 ℃ of sintering 2～4 hours, obtains after the cooling from growing the tough porous ceramic film material of calcium phosphate whisker after 550～800 ℃ of pre-burnings.
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|---|---|---|---|
| CN 200310107578 CN1232472C (en) | 2003-12-17 | 2003-12-17 | Process for preparing self-growing calcium phosphate crystal whisker strengthened porous bioceramic materials |
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|---|---|---|---|
| CN 200310107578 CN1232472C (en) | 2003-12-17 | 2003-12-17 | Process for preparing self-growing calcium phosphate crystal whisker strengthened porous bioceramic materials |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1331809C (en) * | 2005-11-17 | 2007-08-15 | 哈尔滨工业大学 | Machinable composite zirconium oxide ceramic adapting for oral cavity CAD/CAM system and preparation process thereof |
| CN100540071C (en) * | 2006-04-26 | 2009-09-16 | 卢建熙 | Medical reinforced porous biological ceramic and preparation method thereof |
| CN102701782B (en) * | 2012-06-14 | 2013-10-09 | 中原工学院 | Method for preparing porous hydroxyapatite by using glass ceramic as bonding phase |
| CN103585677B (en) * | 2013-10-30 | 2015-09-09 | 四川大学 | A kind of HA micro-nano whisker reinforcement calcium phosphate ceramic material and its preparation method and application |
| CN104710188B (en) * | 2015-03-02 | 2016-06-08 | 浙江大学 | A kind of calcium-silicate biological ceramics porous material, preparation method and application |
| CN106278256A (en) * | 2015-03-31 | 2017-01-04 | 丁永新 | Hardness and anti-wear performance preferable wear-resisting zirconia pottery |
| CN106495681A (en) * | 2015-03-31 | 2017-03-15 | 蒋超 | A kind of bioceramic |
| CN105967726A (en) * | 2016-05-06 | 2016-09-28 | 王泽陆 | Mesoporous HAP/zirconium oxide/lithium oxide artificial bone ceramic and preparation method thereof |
| CN107837419A (en) * | 2016-09-20 | 2018-03-27 | 重庆润泽医药有限公司 | A kind of porous hydroxyapatite |
| CN107056283B (en) * | 2016-12-26 | 2021-04-09 | 上海大学 | Preparation method of zirconia-based porous gradient composite material |
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