Whitlockite Crystal Synthesis With Particle Size Control
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Solution Overview
Problem
Existing methods for synthesizing 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
1Manufacturing precision
If conventional whitlockite manufacturing method is used, then highly pure whitlockite can be produced, but production cost increases and production time becomes long
Solution Approach 1:
The patent segments the reaction process into two independent stages: first forming calcium phosphate precipitate, then separately forming magnesium phosphate precipitate. This segmentation allows each stage to be optimized independently, reducing the overall time required while maintaining high purity of the final whitlockite product.
Solution Approach 2:
The patent performs preliminary action by pre-forming calcium phosphate precipitate before adding magnesium ions. This preliminary formation of the calcium phosphate framework allows subsequent magnesium phosphate to be incorporated more efficiently, reducing total production time while preserving product purity.
2Manufacturing precision
If conventional whitlockite manufacturing method is used, then highly pure whitlockite can be produced, but the process becomes complicated requiring precise pH control
Solution Approach 1:
The patent divides the pH control into two independent stages corresponding to the two precipitation reactions. The first stage controls pH for calcium phosphate formation, and the second stage controls pH for magnesium phosphate formation. This segmentation simplifies the overall control system compared to managing a single complex multi-stage reaction.
Solution Approach 2:
The patent utilizes parameter changes by adjusting pH levels to different ranges for different reaction stages. By changing the pH parameter appropriately for each stage, the patent achieves high purity whitlockite formation without requiring complex continuous pH control throughout the entire process.
3Quantity of substance
If existing whitlockite synthesis method is used, then whitlockite can be produced, but particle size control is not available
Solution Approach 1:
The patent introduces dynamic control of particle size by adjusting reaction parameters such as pH, temperature, and reagent addition rates during the precipitation process. This dynamic adjustment allows the particle size to be controlled according to specific application requirements while maintaining the availability of whitlockite product.
Solution Approach 2:
The patent employs parameter changes by varying pH levels, temperature, and concentration ratios to control the particle size of the formed precipitates. These parameter adjustments enable precise control over the final particle size distribution of whitlockite while ensuring sufficient product quantity.
4Loss of time
If spatial separation method is used, then preparation time is reduced, but process complexity increases
Solution Approach 1:
The patent applies segmentation by separating the formation of calcium phosphate and magnesium phosphate into distinct spatial and temporal stages. This segmentation reduces preparation time by allowing parallel processing of different reaction components while the increased process complexity is managed through systematic division of the overall process into manageable steps.
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 cost while producing highly pure whitlockite with controlled particle size, enhancing its suitability for biocompatible applications.
Implementation Method 1
a first process of preparing a first mixed solution by mixing and reacting a first solution containing calcium ions (corresponding to first cation) and a second solution containing phosphate ions for a first time period in a first container 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 (corresponding to a second cation) other than the calcium ions and a fourth solution containing phosphate ions for a second time period in a second container 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 for a third time period
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.