Electrothermal material composition and electrothermal textile
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Solution Overview
Problem
Existing electrothermal textiles lose their heating and heat-preserving functions after washing due to diminished water washing resistance, necessitating improved materials and designs that maintain performance even after exposure to water.
Innovation Solution
A polyurethane-based electrothermal material composition with a specific repeating unit and dynamic viscosity, combined with metal and carbon nanomaterials, is applied to a textile base, forming an electrothermal textile with a controlled weight ratio of metal nanomaterials and polyurethane, which enhances water resistance and electrical conductivity while maintaining performance after multiple washes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrothermal textile materials are used, then heating and heat-preserving functions are achieved, but water washing resistance is diminished after washing
Solution Approach 1:
The patent uses a composite material system consisting of polyurethane binder and metal nanomaterials (silver, aluminum, or copper) with specific weight ratios (30:100 to 60:100). This composite structure combines the adhesive properties of polyurethane with the high conductivity of metal nanomaterials, creating a material that maintains both heating function and water washing resistance simultaneously.
Solution Approach 2:
The patent optimizes specific parameters including the dynamic viscosity of polyurethane (1000-5000 cP at 25°C) and the weight ratio of metal nanomaterials to polyurethane (30:100 to 60:100). These parameter optimizations ensure the electrothermal material composition maintains stable electrical conductivity and heating performance while achieving improved water washing resistance.
2Reliability
If metal nanomaterials are added to enhance conductivity, then electrical conductivity improves, but material composition complexity increases
Solution Approach 1:
The patent simplifies the material system by optimizing the number of metal nanomaterial types (selecting from silver, aluminum, or copper) and their weight ratios (30:100 to 60:100). This parameter optimization achieves high electrical conductivity while maintaining relatively simple material composition and processing.
3Manufacturing precision
If polyurethane viscosity is increased to improve coating stability, then coating uniformity improves, but dispersion of nanomaterials deteriorates
Solution Approach 1:
The patent optimizes the dynamic viscosity of polyurethane to a specific range (1000-5000 cP at 25°C). This viscosity optimization balances the competing requirements of coating uniformity and nanomaterial dispersion, allowing both functions to be achieved simultaneously through precise parameter control.
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 electrothermal textile exhibits stable surface electrical resistance and heat retention after 20 water washes, demonstrating improved water washing resistance and perspiration fastness, with specific ratios of polyurethane and nanomaterials optimizing conductivity and heating effects.
Implementation Method 1
electrothermal material composition... metal nanomaterials are dispersed in the polyurethane... electrothermal textile exhibits stable surface electrical resistance and heat retention
Data Source
AI summary
An electrothermal composition and electrothermal textiles are provided. The electrothermal composition includes a polyurethane and a plurality of metal nanomaterials. The polyurethane has repeating unit of Formula (I):wherein R1 isR2 isR3 isR4 isR5 is C1-4 alkylene group, R6 is C2-6 alkylene group, R7 is C2-6 alkylene group, R8 is C1-4 alkylene group, X isR9 is C2-6 alkylene group, a is 1 to 100, b is 0 to 100, and a≥b. The polyurethane has dynamic viscosity of 1000 cP to 5000 cP at 25° C.