Calcium-Silicate Porous Particles for Self-Healing Sealing
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Solution Overview
Problem
Current self-healing materials, particularly calcium silicate particles, lack fine control over properties essential for effective sealing and self-healing applications, limiting their durability and multifunctionality in structural materials.
Innovation Solution
Development of calcium-silicate-based porous particles (CSPPs) with controlled size, composition, and porosity, loaded with dual or triple sealants such as epoxy and catalysts, which release upon external stimuli to provide self-healing and sealing capabilities, suitable for various applications including hydraulic fracturing and infrastructure repair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional self-healing materials are used, then basic sealing function is achieved, but fine control over material properties is lacking
Solution Approach 1:
The patent applies parameter changes by precisely controlling particle size (50-2000 nm range), pore size (2-50 nm range), calcium to silicon atomic ratios (0.05-2.0), and sealant loading concentrations. These parameter optimizations enable fine control over particle properties while ensuring reliable sealing performance through systematic variation and selection of critical synthesis parameters.
Solution Approach 2:
The invention utilizes porous calcium-silicate-based particles with controlled pore sizes (2-50 nm) to achieve both fine property control and effective sealing. The porous structure allows for controlled sealant loading and release, providing manufacturing precision through pore size control while maintaining reliability through the inherent sealing capability of the porous architecture.
2Measurement precision
If particle size is reduced to nanometer scale, then sealing precision is improved, but manufacturing uniformity becomes difficult to control
Solution Approach 1:
The patent achieves uniform nanometer-scale particle sizes (50-2000 nm) by optimizing synthesis parameters including pH control, temperature profiles, and reactant concentration ratios. The calcium to silicon atomic ratio control (0.05-2.0) and standardized deviation control (≤6%) demonstrate how parameter changes enable both small size and manufacturing uniformity.
3Adaptability or versatility
If multiple sealants are loaded in particles, then self-healing functionality is enhanced, but particle complexity increases
Solution Approach 1:
The patent implements multi-functionality by loading particles with dual or triple sealant systems (e.g., epoxy + amine + catalyst) within a single porous particle structure. This universal approach provides enhanced self-healing functionality through multiple chemical mechanisms while avoiding the need for separate particle types, thereby managing complexity.
Solution Approach 2:
The invention applies nesting by placing multiple sealants (epoxy, amine, catalyst) hierarchically within the porous particle structure. The porous matrix acts as a container that can accommodate multiple functional components in a organized manner, enhancing functionality while maintaining structural organization and manageable complexity.
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 CSPPs demonstrate enhanced mechanical properties and efficient sealing capabilities, offering improved durability and multifunctionality in structural materials, enabling targeted self-healing and sealing in response to environmental stimuli.
Implementation Method 1
which release upon external stimuli
Data Source
AI summary
A method for synthesizing calcium-silicate-based porous particles (CSPPs) is described. Control over CSPP morphology and pore size is achieved through a refined solution-based synthesis, allowing loading of a variety of sealants. These particles, upon external stimuli, release the loaded sealant into the surrounding material. Methods of loading the CSPPs with loading sealant are described. The CSPPs may be used in pure form or mixed with another material to deliver self-healing, sealing and multi-functional properties to a physical structure. The composition of the CSPPs is described, along with methods of use of the CSPPs.