Fiber-Loaded Thermal Insulation Material With Low Powder Shedding
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Solution Overview
Problem
Existing thermal insulation materials using aerogels compounded with fibers face issues of complex preparation processes, long drying times, and the formation of pores due to solvent volatilization, leading to poor compactness and uniformity, as well as severe powder-shedding.
Innovation Solution
A thermal insulation material composed of thermal insulation powders loaded on the surfaces of reinforcing phase fibers through hydrogen bonding and/or electrostatic attraction, with specific surface hydroxyl group contents, enhancing compactness and reducing powder-shedding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If aerogel is compounded with glass fibers or ceramic fibers to improve strength, then mechanical strength is improved, but preparation process complexity increases and preparation time extends
Solution Approach 1:
The invention divides the thermal insulation material into distinct components: aerogel particles (5-50 μm) as the insulating phase and fibers (1-20 μm diameter, 3-10 mm length) as the reinforcing phase. This segmentation allows each component to perform its specific function independently while simplifying the overall preparation process compared to continuous fiber compounding.
Solution Approach 2:
The invention changes the particle size parameters of aerogel to 5-50 μm and fiber dimensions to 1-20 μm diameter and 3-10 mm length, optimizing the balance between thermal insulation performance and mechanical strength while enabling simpler processing compared to continuous fiber methods.
2Strength
If wet press-molding method is used to form composite material, then mechanical strength is improved, but drying time extends and pores are generated due to organic solvent volatilization
Solution Approach 1:
The invention removes the organic solvent binding agent from the preparation process entirely, using only inorganic materials (aerogel and fibers). This extraction of the harmful element eliminates the drying step and associated pore formation, while still achieving adequate binding through the inorganic matrix.
Solution Approach 2:
The invention converts the potential harm of requiring long drying times and pore formation into a benefit by using an inorganic-based system that naturally eliminates these issues. The inorganic matrix provides binding without organic solvents, turning the constraint into an advantage for faster processing and better compactness.
3Loss of energy
If aerogel is used as thermal insulation material, then thermal insulation performance is improved, but compactness deteriorates due to pore formation
Solution Approach 1:
The invention creates a composite material system combining aerogel particles (5-50 μm) with inorganic fibers (1-20 μm diameter), where the fiber network provides structural support that maintains compactness while the aerogel particles provide thermal insulation, achieving both goals simultaneously without the pore formation issues of previous methods.
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 solution results in a dense, uniformly dispersed material with improved thermal insulation performance, reduced agglomeration, and enhanced mechanical properties, minimizing pores and powder-shedding.
Implementation Method 1
the thermal insulation powders are loaded on the surfaces of the reinforcing phase fibers through hydrogen bonding and/or electrostatic attraction
Implementation Method 2
the thermal insulation powders are loaded on the surfaces of the reinforcing phase fibers through hydrogen bonding and/or electrostatic attraction
Data Source
AI summary
A thermal insulation material includes thermal insulation powders and reinforcing phase fibers, the thermal insulation powders are loaded on surfaces of the reinforcing phase fibers; and, in parts by mass, the thermal insulation powders range from 25 parts to 120 parts, and the reinforcing phase fibers range from 0.5 parts to 40 parts. A battery and an electrical device are further provided.