Coralline Hydroxyapatite Preparation for Brittle Corallite Cutting
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Solution Overview
Problem
The brittleness of corallite during cutting leads to low cutting efficiency, large cutting size limitations, and low yield of acceptable coralline hydroxyapatite products, especially when shaped into small regular forms.
Innovation Solution
A method involving soaking corallite in a polyol-based cutting protective agent, followed by cutting and hydrothermal exchange reaction, to enhance the cutting process and improve the yield of acceptable products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If corallite is cut directly without treatment, then the cutting process is simple, but the corallite is prone to breakage and the yield of acceptable products is low
Solution Approach 1:
The patent applies preliminary action by soaking corallite in a polyol-based protective agent before cutting. This pretreatment penetrates the porous structure of corallite and provides protective coverage, reducing brittleness and preventing breakage during subsequent cutting operations, thereby increasing the yield of acceptable products.
Solution Approach 2:
The polyol-based protective agent serves as an intermediary substance between the corallite and the cutting process. It penetrates the porous structure of corallite and forms a protective layer that reduces brittleness and prevents breakage during cutting, enabling successful processing while maintaining high yield.
2Manufacturing precision
If corallite is cut into small regular shapes, then the product specifications are improved, but the corallite is more fragile and cutting efficiency decreases
Solution Approach 1:
The patent applies preliminary action by soaking corallite in a polyol-based protective agent before cutting. This pretreatment penetrates the porous structure of corallite and provides protective coverage, reducing brittleness and preventing breakage during subsequent cutting operations, thereby increasing the yield of acceptable products.
Solution Approach 2:
The patent changes the physical-chemical parameters of corallite by treating it with a polyol-based protective agent. This treatment modifies the surface properties and internal structure of corallite, reducing its brittleness and making it more suitable for precise cutting into small regular shapes while maintaining cutting efficiency.
3Productivity
If corallite is soaked in polyol-based protective agent before cutting, then the yield of acceptable products increases, but the processing time increases
Solution Approach 1:
The patent optimizes the soaking parameters including polyol concentration (5-50%), soaking time (1-48 hours), and temperature (20-100°C) to achieve the best balance between yield improvement and processing time. By adjusting these parameters, the protective agent effectively penetrates the porous structure without requiring excessively long soaking times.
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 improves cutting efficiency, broadens cutting specifications, and significantly increases the yield of acceptable coralline hydroxyapatite products, particularly for small sizes, ensuring integrity and quality.
Implementation Method 1
The porous structure of natural corallite allows the cutting protective agent to penetrate and protect the corallite effectively
Implementation Method 2
The cutting protective agent is adsorbed onto the surface and within the porous structure of corallite
Implementation Method 3
soaking the acceptable product of cut corallite in a phosphate solution, and performing a hydrothermal exchange reaction to obtain the coralline hydroxyapatite
Implementation Method 4
carrying out a hydrothermal replacement in diammonium phosphate plus hydrothermal liquid system under a high-temperature and high-pressure condition
Data Source
AI summary
A coralline hydroxyapatite having a pore size of 30 μm to 1300 μm, a porosity of 50% to 70%, and a conversion rate of 50% or more, and a preparation method are disclosed. The preparation method comprises: soaking pretreated corallite in a cutting protective agent, and then cutting to obtain cut corallite, and screening for cut corallite that meets a cutting size requirement to obtain an acceptable product of cut corallite; fully soaking the acceptable product of cut corallite in a phosphate solution, and performing a hydrothermal exchange reaction to obtain the coralline hydroxyapatite; wherein the cutting protective agent is a solution containing a polyol. The preparation method can significantly improve the cutting efficiency, broaden the cutting specifications and sizes, and significantly improve the yield of acceptable product, especially the yield of acceptable small-size products, which further broadens the application range of artificial bones.