Flexible Ceramic Oxide Aerogels via Polymer Cross-Linking
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Solution Overview
Problem
Ceramic aerogels are physically and hydrolytically unstable, brittle, and lack flexibility, making them unsuitable for practical applications despite their excellent insulative and mechanical strength properties.
Innovation Solution
A ceramic-oxide network is created with flexible linkages, such as alkyl(trialkoxy)silane and bi-silyl linking groups, to enhance flexibility and mechanical strength through copolymerization, allowing for the production of silica aerogels that can be air-dried without shrinkage or fracture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional ceramic aerogels are used, then excellent thermal and sound insulating qualities are achieved, but physical and hydrolytic stability deteriorates and brittleness increases
Solution Approach 1:
The patent creates a composite material system consisting of ceramic oxide particles (providing thermal insulation) embedded in a polymer matrix (providing mechanical strength and flexibility). The polymer cross-links to form a network that reinforces the ceramic structure, creating a composite that exhibits both excellent thermal insulation properties and improved mechanical reliability, resolving the contradiction between insulation performance and physical stability.
2Quantity of substance
If conventional ceramic aerogels are used, then high porosity is achieved, but mechanical strength deteriorates
Solution Approach 1:
The patent employs a composite structure where the ceramic oxide framework maintains high porosity (95% or greater) while the polymer matrix provides mechanical reinforcement. The polymer cross-links between ceramic particles, creating a reinforced composite that preserves the high porosity necessary for insulation while dramatically improving mechanical strength to withstand practical application stresses.
Solution Approach 2:
The patent applies different material properties to different regions: the ceramic oxide particles maintain high porosity and thermal insulation properties, while the polymer matrix provides mechanical strength and structural continuity. This local differentiation of material functions allows the overall structure to achieve both high porosity and adequate mechanical strength simultaneously.
3Quantity of substance
If conventional ceramic aerogels are used, then low density is achieved, but flexibility deteriorates
Solution Approach 1:
The patent creates a composite where low-density ceramic oxide particles are embedded in a flexible polymer matrix. The polymer provides structural continuity and flexibility while the ceramic particles maintain low overall density. The cross-linked polymer network accommodates deformation, enabling the low-density aerogel to exhibit flexibility and adaptability for practical applications such as flexible insulation panels or wearable thermal management devices.
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 resulting aerogels exhibit improved flexibility and mechanical strength, enabling them to withstand mechanical stresses and eliminating the need for costly supercritical CO2 drying, while maintaining their porous structure.
Implementation Method 1
A ceramic-oxide network is created with flexible linkages, such as alkyl(trialkoxy)silane and bi-silyl linking groups, to enhance flexibility and mechanical strength through copolymerization
Implementation Method 2
The resulting aerogels exhibit improved flexibility and mechanical strength, enabling them to withstand mechanical stresses
Data Source
AI summary
Ceramic oxide aerogels having improved flexibility are disclosed. Preferred embodiments exhibit high modulus and other strength properties despite their improved flexibility. The gels may be polymer cross-linked via organic polymer chains to further improve strength properties, without substantially detracting from the improved flexibility. Methods of making such aerogels are also disclosed.