Porous Heat-Insulating Material With IR Shielding and Flexibility
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Solution Overview
Problem
Existing heat-insulating materials fail to provide sufficient flexibility, restorability, and high-temperature heat-insulating properties, with silica aerogel composites lacking flexibility and hollow latex particle composites compromising heat-insulating properties due to heat transmission paths and material degradation.
Innovation Solution
A heat-insulating material comprising a porous structure with infrared ray shielding particles and organic hollow particles, where the infrared ray shielding particles are 10-30% and organic hollow particles are 5-30% of the total mass, providing high heat insulation through suppressed conduction, convection, and radiation, with organic hollow particles ensuring flexibility and restorability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hollow silica particles are added to aerogel component to improve flexibility, then flexibility is improved, but heat insulating property at high temperatures is insufficient and restorability is not achieved
Solution Approach 1:
The patent uses a composite material system combining aerogel particles (for heat insulation), hollow rubber particles (for flexibility and restorability), and rubber binder (for bonding). This composite approach allows each component to contribute its specific properties: aerogel provides thermal insulation, hollow rubber particles provide elastic deformation and recovery, and the rubber binder ensures structural integrity. The synergistic combination resolves the contradiction by achieving both flexibility and high-temperature heat insulating property simultaneously.
2Strength
If hollow latex particles are used as binder to bond particles together, then particle bonding is achieved, but heat transmission paths are formed and heat insulating property decreases
Solution Approach 1:
The patent applies local quality by using hollow rubber particles specifically at particle contact points and interfaces, where bonding is needed, rather than forming a continuous matrix. The hollow rubber particles are dispersed and positioned to provide bonding at critical locations while maintaining air gaps and porous structure in the bulk material for heat insulation. This localized application of bonding material prevents continuous heat transmission paths while achieving sufficient particle bonding.
3Strength
If continuous matrix of hollow latex particles is formed to bond nanoporous particles, then particle bonding is achieved, but continuous heat transmission path is created
Solution Approach 1:
The patent segments the bonding function by using discrete hollow rubber particles at contact points instead of forming a continuous latex matrix. The bonding is distributed through multiple localized contact points rather than a continuous phase, which breaks up potential heat transmission paths. The segmented structure maintains thermal insulation by preserving air gaps and porous pathways while still achieving adequate bonding strength through the cumulative effect of multiple discrete bonding points.
4Stability of the object's composition
If small amount of infrared attenuators are added (5 wt % or less), then product stability is maintained, but heat insulating property at high temperatures is insufficient
Solution Approach 1:
The patent changes the parameter of infrared shielding content from the conventional 5 wt % or less to a higher level (5-30 mass % of the total composition), which is sufficient to block radiant heat at high temperatures while maintaining product stability. This parameter change is made possible by the synergistic composite system where the aerogel and hollow rubber particles provide structural support and thermal insulation, allowing the infrared shielding component to be present in higher amounts without compromising overall stability.
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 material achieves high heat-insulating properties at both room and high temperatures (up to 500°C) with flexibility and restorability, maintaining insulation by preventing heat transmission paths and material degradation.
Implementation Method 1
a porous structure in which a plurality of particles are connected to form skeletons and which has pores between the skeletons
Implementation Method 2
a porous structure in which a plurality of particles are connected to form skeletons and which has pores between the skeletons
Implementation Method 3
infrared ray shielding particles, in which the infrared ray shielding particles have a content of 10 mass % or more and 30 mass % or less
Data Source
AI summary
A heat-insulating material is provided, which includes a porous structure in which a plurality of particles are connected to form skeletons and which has pores between the skeletons, infrared ray shielding particles, and organic hollow particles. In the heat-insulating material, the infrared ray shielding particles have a content of 10 mass % or more and 30 mass % or less when a mass of the heat-insulating material is 100 mass %, and the organic hollow particles have a content of 5 mass % or more and 30 mass % or less when a mass of the heat-insulating material is 100 mass %.