Aerogel Sheet Encapsulation with PETG for Crack-Free Glass Mounting
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Solution Overview
Problem
Aerogel sheets are fragile and prone to cracking or degrading when traditional mounting methods are used, and existing materials often react chemically with or degrade the aerogel sheets, making it difficult to integrate them into glass articles without damage.
Innovation Solution
The use of polyethylene terephthalate glycol (PETG) as an encapsulation material that is chemically and physically compatible with aerogel sheets, applied in a heated state to bond and encapsulate the edges of the aerogel without causing degradation, along with the formation of walls and bridges to support the aerogel sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mounting methods are used to attach aerogel sheets, then the aerogel sheets can be mounted, but the aerogel sheets crack and/or degrade due to stress and chemical reactions
Solution Approach 1:
The patent uses an encapsulation material as an intermediary between the mounting structure and the aerogel sheet. This encapsulation material is specifically selected to be chemically compatible with aerogel, preventing direct contact between the aerogel and traditional mounting materials that would cause degradation. The encapsulation material absorbs mounting stresses and isolates the aerogel from harmful chemical interactions, thereby maintaining aerogel integrity while enabling the mounting process.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the mounting system by using materials with specific properties - particularly encapsulation materials with chemical compatibility parameters matched to aerogel. The material selection changes parameters such as chemical reactivity, thermal expansion coefficients, and mechanical compliance to prevent aerogel degradation during mounting while maintaining structural integrity.
2Reliability
If encapsulation materials are applied to bond aerogel sheets, then the aerogel sheets can be retained in mounted position, but the encapsulation materials may crack and/or degrade the aerogel sheets upon contact
Solution Approach 1:
The encapsulation material serves as a protective intermediary layer between the aerogel sheet and the external environment. It is specifically selected for chemical compatibility with aerogel, creating a barrier that prevents harmful chemical interactions while still allowing the encapsulation material to perform its bonding and retention functions. This intermediary layer enables secure mounting without direct exposure of the aerogel to degrading substances.
Solution Approach 2:
The encapsulation material creates an inert chemical environment around the aerogel sheet, isolating it from reactive substances that would cause degradation. By surrounding the aerogel with chemically inert or compatible material, the system prevents chemical attacks on the aerogel structure while maintaining the mounted configuration.
3Strength
If heated encapsulation material is used to bond aerogel sheets, then bonding strength is improved, but the aerogel sheets may be damaged by thermal stress
Solution Approach 1:
The patent carefully controls the temperature parameter during encapsulation material application. The heated material is applied at temperatures that provide sufficient bonding strength while remaining below the threshold that would cause thermal degradation of the aerogel. This parameter optimization allows achieving strong bonds without exposing the aerogel to harmful thermal conditions.
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 PETG encapsulation material effectively retains the aerogel sheets in a mounted position on glass without cracking or degrading them, allowing for the creation of multiple-pane insulating glazing units with improved insulation properties.
Implementation Method 1
an encapsulation material that does not crack or degrade the aerogel sheet
Implementation Method 2
methods of depositing encapsulation materials onto an aerogel sheet without cracking or degrading it
Data Source
AI summary
Glass articles are provided that include a glass sheet with an aerogel sheet in a mounted position alongside the glass sheet. The aerogel sheet is retained in the mounted position by an encapsulation material. The encapsulation material can include an organic material, such as a material comprising polyethylene terephthalate glycol. Methods of making glass articles are provided. Also provided are IG units that include encapsulated aerogel sheets, as well as related subassemblies, and methods of manufacturing such IG units and subassemblies.