Calcium Phosphate Coating on Metal via Ozone Water and Silane
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Solution Overview
Problem
Conventional methods for fixing calcium phosphate on metal surfaces require acid treatments, leading to residue issues and foul odors from thiol-based silane coupling agents, which are problematic in practical applications.
Innovation Solution
A method involving ozone water treatment of metal surfaces, followed by the use of a non-thiol-based silane coupling agent and polymerization initiator to bond calcium phosphate, eliminating acid residue and foul odors while enhancing adhesive strength and coating ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If acid treatment is used to fix calcium phosphate on metal surface, then adhesive strength is improved, but harmful residues remain on the surface
Solution Approach 1:
The invention changes the chemical parameters of the treatment method by replacing acid with ozone water, which has different chemical properties. Ozone water provides oxidation capability without leaving harmful residues, thus maintaining adhesive strength while eliminating the harmful effect of acid residue
Solution Approach 2:
Ozone water is used as a temporary treatment medium that decomposes completely after treatment, leaving no persistent residue. The ozone decomposes into oxygen, making it an environmentally friendly alternative to acid that doesn't require extensive rinsing or neutralization steps
2Productivity
If thiol-based silane coupling agent is used to bond calcium phosphate, then bonding efficiency is improved, but foul odor is generated
Solution Approach 1:
The invention extracts the harmful thiol group from the silane coupling agent molecule while retaining the essential bonding functionality. By using non-thiol-based silane coupling agents, the foul odor is eliminated while the coupling agent still effectively bonds calcium phosphate to the metal surface
Solution Approach 2:
The silane coupling agent serves as an intermediary substance that facilitates bonding between the metal surface and calcium phosphate. By selecting non-thiol-based coupling agents, the mediation function is preserved while the harmful odor is removed
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 effectively fixes calcium phosphate on metal surfaces with high adhesive strength and high coating ratios, avoiding acid residue and foul odors, and is suitable for complex shapes and medical applications.
Implementation Method 1
a surface treatment step of bringing the surface of the base material into contact with ozone water
Implementation Method 2
a polymerization step of initiating, after the surface treatment step, polymerization of the silane coupling agent by means of a polymerization initiator
Implementation Method 3
a bonding step of bonding the silane coupling agent at the surface of the base material after the polymerization step, with calcium phosphate
Data Source
AI summary
Provided is a means for fixing calcium phosphate onto the surface of a metal by a treatment method which uses no acid and produces less residue. A method of producing a calcium phosphate composite in which calcium phosphate is bonded to the surface of a base material, the method including a surface treatment step of bringing the surface of the base material into contact with a surface treating agent, and then into contact with a silane coupling agent, to surface treat the base material; a polymerization step of initiating, after the surface treatment step, polymerization of the silane coupling agent by means of a polymerization initiator; and a bonding step of bonding the silane coupling agent at the surface of the base material after the polymerization step, with calcium phosphate; wherein the base material is a metal, and the surface treating agent is ozone water.