Staged Phosphate Precipitation for Whitlockite Particle Control
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Solution Overview
Problem
Existing methods for producing whitlockite are costly, time-consuming, and complex, and lack a method for controlling the particle size of whitlockite crystals, which is crucial for applications in biocompatible materials like artificial bone and dental restorations.
Innovation Solution
A method involving spatial and temporal separation of calcium and phosphate ion reactions, with controlled pH conditions and addition of phosphate ions in bulk quantities, allows for the preparation of whitlockite with adjustable particle size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional whitlockite manufacturing method is used, then whitlockite can be produced, but production time is long and production cost is high
Solution Approach 1:
The patent divides the whitlockite synthesis process into two separate reaction stages: first forming calcium phosphate intermediate products, then adding magnesium ions to transform into whitlockite. This segmentation allows each stage to be optimized independently, reducing total preparation time compared to conventional single-stage methods.
Solution Approach 2:
The patent performs preliminary formation of calcium phosphate intermediates before introducing magnesium ions. This preliminary action enables the system to be pre-positioned in a favorable state for subsequent whitlockite transformation, accelerating the overall synthesis process.
2Ease of manufacture
If conventional whitlockite manufacturing method is used, then whitlockite can be produced, but the process is complicated requiring precise pH control and intermediate products
Solution Approach 1:
The patent utilizes pH parameter changes to drive the reaction sequence: initial pH conditions favor calcium phosphate formation, then pH adjustment triggers magnesium incorporation and whitlockite transformation. This parameter-based control simplifies the process compared to conventional methods requiring multiple intermediate steps.
Solution Approach 2:
The patent employs calcium phosphate compounds as intermediary substances that facilitate the transformation to whitlockite. These intermediates serve as temporary carriers of calcium and phosphate ions, enabling controlled formation of the final product with simpler process requirements.
3Productivity
If conventional whitlockite manufacturing method is used, then whitlockite can be produced, but production cost is high
Solution Approach 1:
The patent maintains continuous useful action throughout the synthesis process by keeping reactions proceeding without interruption or extensive intermediate handling. Calcium and phosphate ions react continuously to form intermediates, which then continuously transform to whitlockite upon magnesium addition, maximizing production efficiency and reducing energy waste.
4Manufacturing precision
If conventional whitlockite manufacturing method is used, then whitlockite can be produced, but particle size control is not achievable
Solution Approach 1:
The patent employs parameter changes including pH adjustment, temperature control, and ion concentration variation to control whitlockite crystal growth. By modifying these parameters during the reaction, the patent achieves particle size control while maintaining operational simplicity through straightforward parameter adjustment rather than complex equipment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly reduces preparation time and costs while producing highly pure whitlockite with controlled particle size, suitable for biocompatible materials.
Implementation Method 1
a first process of preparing a first mixed solution by mixing and reacting a first solution containing calcium ions and a second solution containing phosphate ions to form a first phosphate material
Implementation Method 2
a second process of preparing a second mixed solution by mixing and reacting a third solution containing cation other than the calcium ions and a fourth solution containing phosphate ions to form a second phosphate material
Implementation Method 3
a fourth process of mixing and aging a fifth solution containing phosphate ions with the third mixed solution
Data Source
AI summary
A whitlockite preparation method includes: determining a size of the whitlockite crystal to be prepared; determining a first amount of a first cation other than calcium ion on the basis of the determined size of the crystal, wherein when the determined size of the whitlockite crystal is a first size, the first amount is determined to be a first value, wherein when the determined size is a second size larger than the first size, the first amount is determined to be a second value; mixing calcium ion and phosphate ion in order to prepare a first phosphate crystal, wherein the determined first amount of the cation other than calcium ion is also mixed therewith; mixing a second amount of cation other than calcium ion with phosphate ion to prepare a second phosphate crystal; and aging a solution containing the first phosphate crystal and the second phosphate crystal.