Mycelium Composite Ionic Crosslinking for Strength and Moisture Resistance
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Solution Overview
Problem
Existing cultured mycelium materials with carboxy group binders suffer from low moisture resistance and mechanical strength degradation in high-humidity environments, limiting their use and texture.
Innovation Solution
A composite is produced using mushroom hyphae, a binder with multiple carboxy groups per molecule, and a divalent or higher metal cation, where the carboxy groups are ionically crosslinked via the metal cation, enhancing mechanical strength and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a binder containing carboxy groups is used to bind hyphae, then mechanical strength is improved, but moisture resistance deteriorates due to hydrophilicity
Solution Approach 1:
The patent applies parameter changes by modifying the chemical state of carboxy groups through metal cation crosslinking. The carboxy groups (-COOH) are transformed into metal carboxylate complexes (e.g., -COO-Mg2+-OOC-), which reduces their hydrophilicity and improves moisture resistance while maintaining mechanical strength
Solution Approach 2:
The patent creates a composite material system combining hyphae, binder with carboxy groups, and metal cations. This composite structure allows the carboxy groups to serve dual functions: binding hyphae together and forming crosslinked networks with metal cations that provide both strength and moisture resistance
2Strength
If a binder with carboxy groups is used to bind hyphae, then mechanical strength is improved, but texture quality deteriorates
Solution Approach 1:
The metal cation crosslinking changes the physical-chemical parameters of the binder network, creating a more rigid and stable structure that improves texture quality while maintaining the binding function of carboxy groups
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 composite achieves excellent mechanical strength, moisture resistance, and improved texture, making it suitable for applications like leather substitutes.
Implementation Method 1
the carboxy groups are ionically crosslinked via the metal cation
Data Source
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AI summary
A composite contains: mushroom hyphae; a binder containing two or more carboxy groups per molecule and binding to the hyphae; and a divalent or higher metal cation. The carboxy groups are ionically crosslinked via the metal cation. It is also preferable to further contain a fiber. The fiber preferably contains cellulose.