Macroporous Polymeric Aerogel Design to Reduce Drying Collapse
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Solution Overview
Problem
Conventional mesoporous and microporous structured aerogels face challenges such as collapse during processing, lack of mechanical durability, and complexity in manufacturing, which hinder large-scale production and application flexibility.
Innovation Solution
Development of macroporous structured polymeric aerogels with a majority of pore volume composed of macropores (greater than 50 nm in diameter) to enhance manufacturability and mechanical properties, incorporating support materials for reinforcement, and controlling pore structure through polymer/solvent dynamics during gel formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If mesoporous and microporous structured aerogels are prepared, then high porosity and high specific surface area are achieved, but pore collapse during drying and lack of mechanical durability occur
Solution Approach 1:
The patent changes the pore size parameter from microporous/mesoporous to macroporous structure. This parameter change fundamentally alters the mechanical properties and drying behavior of the aerogel, eliminating pore collapse while maintaining high porosity (up to 90%). The macroporous structure provides sufficient mechanical strength to withstand drying processes without requiring complex drying procedures.
Solution Approach 2:
The patent employs a macroporous material structure where pores larger than 50 nm form the primary framework. This porous architecture provides both the desired high porosity and inherent mechanical strength, as the larger pore walls can better support the structure during processing and application. The macroporous structure naturally resists collapse without requiring additional reinforcement or complex drying protocols.
2Area of stationary object
If mesoporous and microporous structured aerogels are prepared, then high specific surface area is achieved, but processing complexity and manufacturing difficulty increase
Solution Approach 1:
The patent changes the pore size parameter to macroporous (>50 nm), which simplifies the processing while maintaining functional performance. The macroporous structure allows for straightforward drying processes without requiring supercritical drying or extensive stabilization steps, thereby reducing manufacturing complexity while still achieving the necessary surface area for thermal and acoustic insulation applications.
3Loss of substance
If conventional drying procedures are used for mesoporous aerogels, then liquid removal is achieved, but pore collapse and xerogel formation occur
Solution Approach 1:
The patent changes the pore size to macroporous dimensions, which fundamentally alters the drying behavior. The larger pore structure provides sufficient mechanical strength to withstand conventional drying procedures, allowing liquid removal without pore collapse. This eliminates the need for complex supercritical drying while maintaining the aerogel's porous structure and preventing xerogel formation.
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 presence of macropores reduces drying complications, enables scalable and economically efficient production, and improves mechanical properties like flexibility, strength, and gas permeation, while maintaining thermal and acoustic insulation.
Implementation Method 1
polymerizing the monomers in the solution to form a polymer solution and/or a resulting polymer gel matrix
Implementation Method 2
subjecting the polymer gel matrix to conditions sufficient to remove liquid from the gel matrix to form an aerogel
Data Source
AI summary
A macroporous-structured polymeric aerogel, and methods for making and using the same, having a polymeric matrix that includes macropores is disclosed.