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Study the optimal conditions for the preparation of hydroxyapatite in the three-component system: Ca (NO3)2- (NH4)2HPO4- NH3.H2O to be used medically

دراسة الشروط المثلى لتحضير المركب الحيوي هيدروكسي أباتيت في الجملة ثلاثية المكون: Ca(NO3)2-(NH4)2HPO4- NH3.H2O لاستخدامه طبياً

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 Publication date 2017
  fields Chemistry
and research's language is العربية
 Created by Shamra Editor




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The aim of this research is to study the optimal conditions for the preparation of hydroxyapatite , Chemical formula: Ca10(PO4)6(OH)2 (HA). In the three-component system: Ca(NO3)2-(NH4)2HPO4-NH3.H2O , Calcium Nitrate was prepared based on the calcification of the white eggshell . to obtain calcium oxide (CaO), which is treated with nitrogen acid, while ammonium phosphate Mono hydrogen and ammonium solution was taken from its pure packaging. Hydroxyapatite (HA) Ca10 (PO4) 6 (OH)2was prepared under specific conditions, mainly: concentration of solutions used, speed of addition of reagents, reaction mix temperature, rotational speed, purity of materials used, and pH of the solution. The study showed that the solid compound recorded in the three-component system, which was separated from the liquid phase and dried and chemically analyzed, has the total chemical formula Ca10 (PO4) 6 (OH)2 and has a Molar ratio of Ca / P= 1.666 . and the preparation process was better in the model burned from the dried model and confirmed by the study of samples of the models dried and burned by IR infrared spectroscopy and XRD X ray diffraction spectroscopy, The burner model was a crystalline product, but in the dried model the output was mixed crystalline and not crystalline.


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Research summary
تهدف هذه الدراسة إلى تحديد الشروط المثلى لتحضير مركب هيدروكسي أباتيت (HA) ذو الصيغة الكيميائية Ca10(PO4)6(OH)2 في النظام ثلاثي المكونات: Ca(NO3)2-(NH4)2HPO4-NH3.H2O، لاستخدامه في التطبيقات الطبية. تم تحضير نترات الكالسيوم من قشر البيض الأبيض للحصول على أكسيد الكالسيوم (CaO) الذي يعالج بحمض الآزوت، بينما تم استخدام فوسفات الأمونيوم أحادية الهيدروجين ومحلول الأمونيا من عبواتها النقية. تم تحضير المركب الحيوي هيدروكسي أباتيت تحت شروط محددة تشمل تركيز المحاليل، سرعة إضافة الكواشف، درجة حرارة المزيج التفاعلي، سرعة التحريك، نقاوة المواد، ودرجة حموضة المحلول. أظهرت الدراسة أن المركب الصلب المحضر في النظام ثلاثي المكونات يمتلك الصيغة الكيميائية Ca10(PO4)6(OH)2 ونسبة مولية Ca/P=1.666. كانت عملية التحضير أفضل في النموذج المحروق مقارنة بالنموذج المجفف، كما أكدت ذلك دراسات مطيافية الأشعة تحت الحمراء (IR) ومطيافية انعراج الأشعة السينية (XRD). أظهرت النتائج أن النموذج المحروق كان بلورياً بينما كان النموذج المجفف مختلطاً بين البلوري وغير البلوري. تم تحليل العينات كيميائياً وطيفياً وأظهرت النتائج تطابقاً جيداً مع القيم المرجعية، مما يشير إلى أن المركب المحضر يمكن استخدامه في التطبيقات الطبية والجراحية.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة في مجال تحضير المواد الحيوية باستخدام موارد طبيعية منخفضة التكلفة مثل قشر البيض. ومع ذلك، يمكن تحسين الدراسة من خلال توسيع نطاق التجارب لتشمل ظروف تفاعلية مختلفة مثل الضغط والوقت، بالإضافة إلى دراسة تأثير هذه الظروف على خصائص المركب النهائي. كما يمكن تحسين دقة النتائج من خلال استخدام تقنيات تحليلية أكثر تقدماً. من الجيد أيضاً النظر في تطبيقات أخرى للمركب المحضر خارج نطاق الجراحة الطبية، مثل استخدامه في ترميم الأسنان أو كمواد حشو في العظام.
Questions related to the research
  1. ما هي الشروط المثلى لتحضير مركب هيدروكسي أباتيت في هذه الدراسة؟

    تشمل الشروط المثلى تركيز المحاليل المستخدمة، سرعة إضافة الكواشف، درجة حرارة المزيج التفاعلي، سرعة التحريك، نقاوة المواد المستخدمة، ودرجة حموضة المحلول (pH).

  2. ما هي النسبة المولية للمركب المحضر وكيف تم تحديدها؟

    النسبة المولية للمركب المحضر هي Ca/P=1.666. تم تحديدها من خلال التحليل الكيميائي للعينات المحضرة ومقارنتها مع القيم المرجعية.

  3. ما الفرق بين النموذج المجفف والنموذج المحروق للمركب المحضر؟

    النموذج المحروق كان بلورياً بينما كان النموذج المجفف مختلطاً بين البلوري وغير البلوري. هذا الفرق تم تأكيده من خلال دراسات مطيافية الأشعة تحت الحمراء (IR) ومطيافية انعراج الأشعة السينية (XRD).

  4. ما هي الفوائد البيئية والاقتصادية لهذه الدراسة؟

    تساهم الدراسة في التخلص من نفايات قشر البيض بطرق مفيدة بيئياً، وتوفر تكاليف شراء مادة الهيدروكسي أباتيت من الخارج، مما يوفر القطع الأجنبي.


References used
K. De Groot. 1983-Ceramics of Calcium phosphates: preparation and properties, In : K.De Groot, editor. Bioceramics of Calcium Phosphate-Bocaraton : CRC press, p100-114
K. De Groot. 1998-Effect of porosity and physico-chemical properties on The Stability,resorption and Strength of Calcium phosphate Ceramics in : P. Ducheyne and J.Lemons, editors. Bioceramics : Materiel characteristics versus in vivo Behavior, New York : Annals of New York Academy Sciences , p268-277
Santos MH, de Oliveira M, de Freitas Souza P, Mansur HS, Vasconcelos WL. 2004- Synthesis control and characterization of hydroxyapatite prepared by wet precipitation process, Mater Res, 7(4):p 625-630
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