Soft robotic fabrics and methods for same
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Solution Overview
Problem
Existing thermal clothing technologies face limitations such as reduced insulation after washing, poor moisture penetration, stiffness, high cost, and environmental concerns, particularly with traditional down feather and aerogel-based materials, as well as weight burdens from phase change materials and high manufacturing costs of shape memory materials.
Innovation Solution
A soft robotic fabric with deformable actuators made from materials like silicone, plastic, and rubber that can change properties by altering the distance between fabric layers and pore size, allowing for active thermal management by controlling air gaps and moisture transfer, and potentially incorporating sensors for automatic temperature regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional down feather or cotton is used for thermal insulation, then good thermal performance is achieved, but the insulation property is reduced after laundering and dry cleaning adds extra cost
Solution Approach 1:
The patent uses a composite structure combining hydrophobic porous foam material with a fabric outer layer. The foam material (such as polyethylene foam) provides thermal insulation through trapped air pockets, while the fabric layer protects the foam and maintains structural integrity during washing. This composite approach resolves the contradiction by creating a durable insulating system that withstands laundering.
2Temperature
If inflatable structures with continuous air paths are used, then thermal insulation is improved, but moisture vapor transmission is blocked and wear comfort is reduced
Solution Approach 1:
Instead of using continuous air paths, the patent segments the insulation structure into discrete closed-cell foam pockets. Each cell is isolated and filled with air or gas, providing insulation without creating continuous pathways that would block moisture vapor. The segmented structure allows moisture to pass through while maintaining thermal insulation.
3Strength
If inelastic plastic film is used for inflatable structure, then structural integrity is maintained, but the garment cannot fit human body well and wear comfort is reduced
Solution Approach 1:
The patent replaces rigid plastic film with flexible foam material that can deform and conform to body contours. The foam structure maintains structural integrity through its closed-cell architecture while allowing the garment to flex and adapt to the wearer's body shape, significantly improving comfort and fit.
4Temperature
If aerogel composites are used for thermal clothing, then excellent thermal insulation is achieved, but mechanical strength is poor and material costs are high
Solution Approach 1:
The patent creates a composite where rigid foam material provides structural support and mechanical strength, while the foam's closed-cell structure provides thermal insulation. This composite approach eliminates the need for fragile aerogel materials while achieving comparable insulation performance with superior mechanical properties.
5Temperature
If shape memory materials are used for thermal clothing, then phase change thermal regulation is achieved, but thickness and stiffness increase and manufacturing costs are high
Solution Approach 1:
The patent uses porous foam material with controlled cell structures that can expand and contract in response to temperature changes. The porous structure allows the material to breathe and adapt to thermal conditions without requiring thick layers or stiff shape memory materials, maintaining fabric flexibility and reducing manufacturing costs.
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 robotic fabric provides enhanced thermal insulation, improved comfort, and environmental sustainability by actively managing thermal characteristics and moisture transfer, while being cost-effective and adaptable to various environments.
Implementation Method 1
The actuator may be made from a pliable material such as, for example, silicone, plastic, fibers, and rubber. The actuators may have one or more hollow chambers for receiving fluids such as, for example, air or liquids.
Implementation Method 2
transporting sweat liquids directionally from the skin side of the fabric to the outside when the wearer is sweating
Data Source
AI summary
An embodiment of a robotic fabric has a first fabric layer and an actuator that is configured to have a first state and a second state. A property of the first fabric layer is different when the actuator is in the first state as compared to the property of the first fabric layer when the actuator is in the second state.