Effect of synthesized parameters on biphasic calcium phosphate nanopowders prepared from chicken eggshells
บทความในวารสาร
ผู้เขียน/บรรณาธิการ
กลุ่มสาขาการวิจัยเชิงกลยุทธ์
ไม่พบข้อมูลที่เกี่ยวข้อง
รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Pankaew P., Klumdoung P., Hoonnivathana E., Limsuwan P., Naemchanthara K.
ผู้เผยแพร่: American Scientific Publishers
ปีที่เผยแพร่ (ค.ศ.): 2013
วารสาร: Advanced Science Letters (1936-6612)
Volume number: 19
Issue number: 3
หน้าแรก: 976
หน้าสุดท้าย: 980
จำนวนหน้า: 5
นอก: 1936-6612
eISSN: 1936-7317
ภาษา: English-Great Britain (EN-GB)
บทคัดย่อ
Material that shows hydroxyapatite (HAp) and β-tricalcium phosphate (β-TCP) phases has been called biphasic calcium phosphate (BCP). In present work, BCP nanopowders were prepared and characterized for future applications on the utilization of bioactivity of HAp and bioresorbability of β-TCP properties. CaO powders were prepared from the eggshells by heating at 1300 °C for 4 h. CaO powders were mixed with HNO3 to obtain Ca(NO3)2 solution. In the first experiment, each of Ca(NO3)2 and (NH4)2 HPO4 solutions was mixed with NH4OH solution to obtain a pH of 7.6. Then, (NH4)2 HPO4 solution was dropped into Ca(NO3)2 solution with different rates of 13, 5 and 3 ml/min, respectively. The second experiment, both Ca(NO3)2 and (NH4)2 HPO4 solutions were added with NH4OH solution to obtain different pH values of 8.6, 9.6 and 10.6, respectively. Then, (NH4)2 HPO4 and Ca(NO3)2 solutions with the same pH was mixed by dropping (NH4)2 HPO4 into Ca(NO3)2 solutions at a rate of 3 ml/min. The mixed solutions, obtained from the first and second experiments, were allowed to precipitate for 8 h, filtered and dried at 80 °C for 24 h. Finally Ca10-x(HPO4)x(PO4)6-x(OH)2-x(Ca-dHAp) powders were obtained. The Ca-dHAp powders were further calcined at different temperatures of 200-1200 °C for 3 h. Then, BCP with HAp and β-TCP phases were obtained. The results indicate that the reduction of β-TCP phase fraction in BCP could be controlled by increasing either the Ca/P molar ratio of synthesized Ca-dHAp or calcination temperature. The primary particle size of BCP nanopowders with spherical like morphology was larger with slower addition rate or with higher pH value. © 2013 American Scientific Publishers All rights reserved.
คำสำคัญ
Eggshells
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