Aerogel Blanket Surface Etching for Dust Reduction
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Solution Overview
Problem
The existing methods for preparing aerogel blankets, such as the gel casting method, suffer from weak adhesion between the base material and the silica aerogel, leading to dust generation and reduced mechanical flexibility, especially when applied to flexible forms like heat insulating or sound absorbing materials for curved surfaces.
Innovation Solution
A method involving surface etching of the base material using an acidic solution, followed by impregnation with a silica sol, gelation, aging, and a gel deformation process to increase adhesion and porosity, and subsequent drying to create a low-dust, high-insulation aerogel blanket with improved mechanical flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gel casting method is used to prepare aerogel blanket, then excellent physical properties are achieved, but dust generation increases due to weak adhesion between base material and aerogel
Solution Approach 1:
The base material surface is treated with an acidic solution before aerogel impregnation to pre-activate the surface and create anchoring structures. This preliminary surface modification ensures strong adhesion between the base material and aerogel, preventing dust generation during subsequent handling and application while maintaining the excellent physical properties achieved through gel casting
Solution Approach 2:
The surface properties of the base material are changed by controlling the acidic solution treatment parameters (concentration, treatment time, temperature) to optimize surface roughness and chemical reactivity. This parameter optimization enhances aerogel adhesion without compromising the overall physical properties of the aerogel blanket, resolving the contradiction between reliability and dust generation
2Adaptability or versatility
If aerogel blanket is made in flexible form for curved surfaces, then adaptability is improved, but adhesion between base material and aerogel deteriorates leading to increased dust generation
Solution Approach 1:
The base material is pre-treated with acidic solution to create surface features that provide mechanical interlocking and chemical bonding sites. This preliminary surface activation ensures that even when the blanket is formed into flexible curved shapes, the aerogel remains strongly adhered to the base material, preventing dust generation while maintaining adaptability to various surface geometries
Solution Approach 2:
The invention creates a composite structure where the treated base material and aerogel form a strongly bonded integrated material. The acidic treatment generates surface features that enhance the interface between base material and aerogel, creating a composite that maintains strong adhesion even in flexible configurations for curved surfaces, thus preventing dust while improving adaptability
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 significantly reduces dust generation and enhances thermal conductivity by improving the adhesion of aerogel particles to the base material, while increasing mechanical flexibility and maintaining high insulation properties.
Implementation Method 1
a step of inducing etching of a surface of a base material for a blanket using an acidic solution
Implementation Method 2
impregnating the surface-treated base material for a blanket with the silica sol
Implementation Method 3
gelling the silica sol in a state in which the base material for a blanket is impregnated with the silica sol
Implementation Method 4
aerogels are super-insulation having a thermal conductivity of 0.300 W/m·K or less
Data Source
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AI summary
The present invention relates to a method of preparing an aerogel blanket in which, a surface of a base material for a blanket is activated and roughness and porosity of the surface of the base material for a blanket are increased to increase adhesion performance of a silica aerogel by inducing etching of a surface of a base material for a blanket using an acidic solution, and mechanical flexibility is increased and the generation of dust is minimized by further performing a gel deformation process of introducing cracks into the aerogel, and a low-dust and high-insulation aerogel blanket prepared according to the present invention.