On the role of the indifferent electrolyte LiCl in electrophoretic deposition of hydroxyapatite from 2-propanol dispersions |
| |
| Affiliation: | 1. CEITEC – Central European Institute of Technology, Brno University of Technology, Purkynova 123, Brno, 612 00 Czech Republic;2. Institute of Materials Science and Engineering, Brno University of Technology, Technicka 2, Brno, 616 00 Czech Republic;3. CEITEC IPM, Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 513/22, Brno, 616 62 Czech Republic;1. Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan, PO Box 77176, Iran;2. Malek-Ashtar University of Technology, Elites Advanced Research Center, PO Box 16765-3454, Tehran, Iran;1. Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country UPV/EHU, P.O. Box 644, 48080 Bilbao, Basque Country, Spain;2. Department of Analytical Chemistry, Faculty of Pharmacy, University of the Basque Country UPV/EHU, P.O. Box 450, 01080 Vitoria-Gasteiz, Basque Country, Spain;3. Department of Plant Biology & Ecology, Faculty of Science and Technology, University of the Basque Country UPV/EHU, P.O. Box 644, 48080 Bilbao, Basque Country, Spain;1. Department of Material Science and Engineering, Faculty of Engineering, Hakkari University, 30000 Hakkari, Turkey;2. Department of Physics, Faculty of Sciences and Letters, Çukurova University, 01330 Adana, Turkey;3. ICMA (CSIC-Universidad de Zaragoza), María de Luna, 3, 50018 Zaragoza, Spain;1. Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100 Copenhagen Ø, Denmark;2. Department of Environmental Science, Aarhus University, Frederiksborgvej 399, Postboks 358, DK-4000 Roskilde, Denmark;1. Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA;2. Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, USA |
| |
| Abstract: | In the present work, the effect of an indifferent electrolyte (LiCl) on the electrical conductivity of dispersions for the electrophoretic deposition (EPD) of thick layers (>1 mm) of hydroxyapatite (HA) with low surface roughness was studied. The indifferent electrolyte was added at concentrations of 0.10 and 0.25 g/L into dispersions, which contained HA particles, 0–21.25 wt% monochloroacetic acid (MCAA) and 2-propanol. The stability of the dispersions, which was determined by measuring the zeta potential, increased with the MCAA content in the dispersion (up to −31.4 mV). An addition of LiCl slightly reduced the stability of the dispersions but significantly increased their electrical conductivity. The increase in electrical conductivity caused the decrease in deposition rate during the EPD, which affected the deposition yields and deposit thickness. The relative density of the HA deposits increased with the MCAA content in the dispersion and further increased when 0.10 g/L of LiCl was added. Moreover, using a highly conductive dispersion, thick HA layers were deposited with low surface roughness and no surface cracks. An optimum content of indifferent electrolyte in the dispersion enables the preparation of relatively dense and thick (>2 mm) HA deposits with a low surface roughness (~3 µm) via EPD, which can be used in medical applications. |
| |
| Keywords: | Electrophoretic deposition Electrical conductivity Thick layer Surface roughness Hydroxyapatite |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
