使用水基羟基磷灰石(HA, Ca5(PO4)3OH)浆料, 用冰模板法制备定向层状多孔HA陶瓷, 研究了浆料中HA陶瓷颗粒含量和冷端温度的影响。结果表明: 随着浆料中HA陶瓷颗粒含量的提高, 浆料的粘度值增大, 层状多孔结构的层厚度相应增加, 孔道层间距减小甚至消失, 多孔材料的抗压强度从1.4 MPa提高到5.7 MPa, 孔隙率从76.2%降低到44.2%。降低冷端温度使片层状结构的层间距从大约20 μm减小到3--5 μm, 陶瓷层厚度从2--3 μm增大到15--20 μm。
The porous ceramics with unidirectional lamellar pore structures was prepared by icetemplating of aqueous hydroxyapatite (HA, Ca5 (PO4)3OH) slurry, and the effects of content of the solids loading and the temperature of the cold finger were investigated. The results show that the viscosity of the suspensions increased as content of the solids loading increased. The lamellar thickness increased along with the decreasing porosity from 76.2% to 44.2%. The compressive strength increased from 1.4 MPa to 5.7 MPa. With the decreasing temperature of the cold finger, the lamellar thickness of the porous architecture decreased from 20 μm to 3–5 μm, and the thickness of the ceramic wall improved from 2–3 μm to 15–20 μm.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | S.K.Swain, Processing of porous hydroxyapatite scaffold, Master Degree, National Institute of Technology Rourkela, India (2009)2 J.R.Jones, L.M.Ehrenfried, L.L.Hench, Optimising bioactive glass scaffolds for bone tissue engineering, Biomaterials, 27(7), 964(2006)3 A.Cosijns, C.Vervaet, J.Luyten, S.Mullens, F.Siepmann, Porous hydroxyapatite tablets as carriers for low-dosed drugs, European Journal of Pharmaceutics and Biopharmaceutics, 67(2), 498(2007)4 S.Teixeira, M.A.Rodriguez, P.Pena, A.H.De Aza, S.De Aza, Physical characterization of hydroxyapatite porous scaffolds for tissue engineering, Materials Science and Engineering C, 29(5), 1510(2009)5 R.Ravikrishna, M.Ren, K.T.Valsaraj, Low-temperature synthesis of porous hydroxyapatite scaffolds using polyaphron templates, Journal of Sol&ndash |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%