Biscrolled Yarn Fabrication Using Carbon Nanotube Sheets
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Solution Overview
Problem
Current methods fail to effectively convert nanopowder and nanofiber materials into yarns with ultra-high loading, leading to degradation of functionality and reduced durability, and existing technologies struggle to integrate these materials into multifunctional textiles for applications like energy harvesting and biological threat detection.
Innovation Solution
The development of a biscrolling method using carbon nanotube sheets as a platform to create bilayered structures, allowing for the incorporation of up to 99% weight percent of functional materials into yarns, maintaining grain size and enhancing material properties such as superconductivity and catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nanopowder and nanofiber materials are converted into yarns using conventional methods, then yarn structure is formed, but functionality degrades and loading levels decrease
Solution Approach 1:
The patent segments the yarn structure into distinct functional zones: a core region containing high concentrations of nanopowder/nanofiber materials, and an outer matrix region providing structural support. This segmentation allows the functional materials to maintain their properties while achieving high loading levels up to 99 wt% in the core region without compromising overall yarn integrity.
Solution Approach 2:
The patent implements a nested structure where nanopowder and nanofiber materials are embedded within a matrix material that forms the yarn structure. The functional materials are contained within protective encapsulations or coated structures, creating multiple nested layers that preserve material functionality while achieving high concentration loading.
2Shape
If nanopowder and nanofiber materials are processed into yarns, then yarn form is achieved, but accessible surface area decreases and functionality degrades
Solution Approach 1:
The patent applies local quality by creating regions with different functional characteristics within the yarn. The core region maintains high surface area-to-volume ratio of nanopowder/nanofiber materials to preserve functionality, while the outer matrix region provides the necessary yarn shape and mechanical properties. This localized differentiation allows simultaneous achievement of yarn form and functional preservation.
Solution Approach 2:
The patent transitions from two-dimensional sheet structures to three-dimensional yarn structures through controlled rolling and twisting processes. This dimensional transformation maintains the functional advantages of nanoscale materials by preserving their surface area characteristics while achieving the desired yarn morphology for textile applications.
3Reliability
If nanoparticles or nanofibers are coated on yarns after spinning, then functional properties are added, but loading levels and durability severely decrease
Solution Approach 1:
The patent implements preliminary action by incorporating nanopowder and nanofiber materials into the yarn structure during the spinning process itself, rather than as a subsequent coating step. This allows functional materials to be integrated at the core level where they can achieve much higher loading levels (up to 99 wt%) compared to surface coating methods, while maintaining durability through structural integration.
Solution Approach 2:
The patent creates a core-shell structure where the core region replicates the functional properties of pure nanopowder/nanofiber materials at high concentrations, while the outer shell provides structural support. This copying approach allows the functional materials to achieve their full potential performance without being limited by surface area constraints of coating methods.
Data Source
AI summary
Fabrication of yarns or other shaped articles from materials in powder form (or nanoparticles or nanofibers) using carbon nanotube/nanofiber sheet as a platform (template). This includes methods for fabricating biscrolled yarns using carbon nanotube/nanofiber sheets and biscrolled fibers fabricated thereby.