REDUCED SOLUBILITY OF NANO-HYDROXYAPATITE COMPOSITE/POLYMER THE SUBSTITUTION OF FLUORINE IONS INSTEAD OF THE HYDROXYL GROUP

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HESHMATPOUR FELORA; ANARAKI AMENEH

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Seminar: IRANIAN INORGANIC CHEMISTRY CONFERENCE
Year:2014 | Issue:16

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Title

REDUCED SOLUBILITY OF NANO-HYDROXYAPATITE COMPOSITE/POLYMER THE SUBSTITUTION OF FLUORINE IONS INSTEAD OF THE HYDROXYL GROUP

Author(s)

HESHMATPOUR FELORA | ANARAKI AMENEH

Keywords

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Abstract

POLY-HYDROXYAPATITE IS OFTEN USED IN BONE TISSUE ENGINEERING, DEIONIZED WASTEWATERS AND ANTIBACTERIALS [1,2]. HIGH SOLUBILITYIN APATITE, LIMIT ITS PERFORMANCE IN INDUSTRY AND BIOTECHNOLOGY. ONE OF THE PROPER METHODS FOR DECREASING THE DISSOLUTION RATE IS SUBSTITUTION OF OH- GROUPS IN HYDROXYAPATITE BY F- IONS, WHICH LEADS TO THE FORMATION OF FLUORINE SUBSTITUTED HYDROXYAPATITE [3]. PURE FLUOR APATITE IS KNOWN TO HAVE A MUCH LOWER SOLUBILITY THAN HYDROXYAPATITE. MOREOVER, IT POSSESSES A GREATER CHEMICAL AND STRUCTURAL STABILITY THAN HYDROXYAPATITE.IN THIS WORK, WE MODIFIED APATITE NANO COMPOSITE WITH NATURAL POLYMER (CHITOSAN), BY PRECIPITATION METHOD. THE SELECTED AMOUNT FOR SUBSTITUTION OF OH- BY F- IS INDICATED BY THE X VALUE IN THE GENERAL FORMULA OF FLUOR HYDROXYAPATITE (CA10(PO4)6OH2-XFX), WHERE 0<X<2. IN VITRO DISSOLUTION BEHAVIOR OF PREPRARED NANO COMPOSITS FLUORIDATED HYDROXYAPATITE/CHITOSAN WAS QUANTITATIVELY EXAMINED IN THE SBF UNDER PHYSIOLOGICAL CONDITION OF PH 7.4 AT 37 °C AT PREDETERMINED TIME INTERVALS UP TO 4 WEEKS. THE GRAPH OF THE CA CONCENTRATIONS (PPM) PER TIME ILLUSTRATES THE DISSOLUTION OR BIORESORBABILITY BEHAVIOR OF SYNTHESIZED SAMPLES WITH DIFFERENT DEGREES OF FLUORIDATION.FT-IR INDICATED THAT THE POLAR GROUP (NH2 -) OF THIS POLYMER (CHITOSAN) PROVIDE NUCLEATION SITES FOR THE GROWTH OF CRYSTALLINE FLUOR APATITE PARTICLE. XRD DEPICTED THE FORMATION PROCESS OF FLUOR APATITE CRYSTAL. ACCORDING TO THE SCHERRER EQUATION THE SIZE OF FLUOR APATITE CRYSTALLITES WAS AROUND 21-22 NM. FINALLY, SEM ILLUSTRATED THE SPHERICAL MORPHOLOGY OF THE PREPARED COMPOUND.

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APA: Copy

HESHMATPOUR, FELORA, & ANARAKI, AMENEH. (2014). REDUCED SOLUBILITY OF NANO-HYDROXYAPATITE COMPOSITE/POLYMER THE SUBSTITUTION OF FLUORINE IONS INSTEAD OF THE HYDROXYL GROUP. IRANIAN INORGANIC CHEMISTRY CONFERENCE. SID. https://sid.ir/paper/912042/en

Vancouver: Copy

HESHMATPOUR FELORA, ANARAKI AMENEH. REDUCED SOLUBILITY OF NANO-HYDROXYAPATITE COMPOSITE/POLYMER THE SUBSTITUTION OF FLUORINE IONS INSTEAD OF THE HYDROXYL GROUP. 2014. Available from: https://sid.ir/paper/912042/en

IEEE: Copy

FELORA HESHMATPOUR, and AMENEH ANARAKI, “REDUCED SOLUBILITY OF NANO-HYDROXYAPATITE COMPOSITE/POLYMER THE SUBSTITUTION OF FLUORINE IONS INSTEAD OF THE HYDROXYL GROUP,” presented at the IRANIAN INORGANIC CHEMISTRY CONFERENCE. 2014, [Online]. Available: https://sid.ir/paper/912042/en

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