Method of fabricating patterned cellulose nanocrystal composite nanofibers and nano thin films and their applications
AssigneeNational Tsinghua University
InventorsWei-Chih Wang, Yen-Tse Cheng
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Abstract
The present invention provides a method for fabricating patterned cellulose nanocrystal (CNC) composite nanofibers and thin films for optical and electromagnetic sensor and actuator application, comprising the following steps of: selecting materials for fabricating patterned cellulose nanocrystal (CNC) composite nanofibers; and fabricating patterned CNCs composite nanofibers by incorporating secondary phases either during electrospinning or post-processing, wherein the secondary phases may include dielectrics, electrically or magnetically activated nanoparticles or polymers and biological cells mechanically reinforced by CNCs.
Claims14
A method for fabricating conductive cellulose nanocrystal (CNC) nanofiber yarn, comprising the steps of:
- preparing a CNC mixture of solution comprising conductive polymer suspension in a CNC fabrication module using CNC materials;
- fabricating CNC nanofibers using the CNC mixture of solution and extracting the CNC nanofibers through a dispensing needle of the CNC fabrication module towards a metal stage, the dispensing needle having an adjustable distance to the metal stage;
- and
- applying electric fields between the dispensing needle and the metal stage to spin and organize the CNC nanofibers above the metal stage to form twisted nanofiber structure and produce CNC nanofiber yarn by growing the twisted nanofiber structure towards the dispensing needle.
A method for fabricating a conductive cellulose nanocrystal (CNC) based humidity sensing fibers, comprising the steps of:
- preparing a CNC aqueous solution comprising poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS);
- homogenizing the CNC aqueous solution in an ultrasonic cleaner;
- fabricating nanofibers based on materials comprising Poly(DL-lactide) (PDLLA);
- cleaning and degassing the nanofibers;
- and
- vertically dipping the nanofibers into the homogenized CNC aqueous solution and pulling the dipped nanofibers out with a uniform pulling rate to form the CNC based humidity sensing fibers.
Dependencies are inferred from the claim text.