Calcium Phosphate-Fiber Complexes for Adsorbent Applications
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Calcium phosphate microparticles with small primary particle sizes are cohesive and difficult to handle in a dispersed state, limiting their application efficiency when used alone, and existing methods for forming complexes with fibers result in aggregated particles rather than uniform adhesion.
Innovation Solution
Reacting phosphoric acid with a calcium source in the presence of fibers to form calcium carbonate microparticles with small primary sizes, which are then converted to calcium phosphate microparticles, ensuring uniform adhesion and retention on the fiber surface, and incorporating titanium to enhance properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If calcium phosphate microparticles with small primary particle sizes are used, then adsorbent capacity is improved, but handling difficulty increases due to cohesiveness
Solution Approach 1:
The patent uses fiber as an intermediary carrier to handle calcium phosphate microparticles. The microparticles are deposited on the fiber surface, which provides a manageable structure that prevents cohesiveness while maintaining the high surface area and adsorbent capacity of the fine particles. This resolves the handling difficulty without sacrificing the quantity of substance.
2Reliability
If calcium phosphate is deposited on fiber surface, then retention is improved, but particle aggregation occurs instead of uniform adhesion
Solution Approach 1:
The patent applies preliminary action by first treating the fiber surface and preparing the calcium phosphate suspension before deposition. This pre-treatment ensures that when calcium phosphate is deposited, it adheres uniformly to the fiber surface rather than aggregating, thus achieving both high retention and uniform distribution.
Solution Approach 2:
The patent controls deposition parameters such as suspension concentration, deposition method, and fiber treatment to achieve uniform particle distribution. By optimizing these parameters, the calcium phosphate microparticles adhere evenly to the fiber surface, preventing aggregation while ensuring high retention.
3Productivity
If calcium carbonate is synthesized by conventional carbonation process, then production efficiency is improved, but particle size control and uniformity are compromised
Solution Approach 1:
The patent employs periodic action in the carbonation process by controlling the injection of carbon dioxide gas in periodic pulses rather than continuous flow. This periodic injection, combined with stirring cycles, allows for better control of nucleation and crystal growth, producing calcium carbonate with consistent particle size while maintaining high production efficiency.
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 allows for the efficient preparation of calcium phosphate-fiber complexes with small particle sizes, improving adsorbent capacity and retention, and enabling the formation of high-quality products like sheets with high ash content and photocatalytic properties.
Implementation Method 1
Reacting phosphoric acid with a calcium source in the presence of fibers to form calcium carbonate microparticles with small primary sizes, which are then converted to calcium phosphate microparticles
Implementation Method 2
ensuring uniform adhesion and retention on the fiber surface
Data Source
Figure 1~3
Figure 4~6
Figure 7~9
AI summary
The present invention aims to provide techniques for preparing complexes of calcium phosphate particles and a fiber. According to the present invention, complexes of calcium phosphate particles and a fiber are provided. According to the present invention, calcium phosphate-fiber complexes in which titanium is retained can be further obtained.