Environmentally Friendly Manufacturing of Nano, Micro and Sub-micro Fibers with Hybrid CAB System

Tech ID: 21818 / UC Case 2006-682-2


Researchers at the University of California, Davis have developed a novel and high throughput production process of making nano/submicro-sized fibers.

Full Description

Researchers at the University of California, Davis have developed an environmentally friendly manufacturing method for nano, micro and sub-micro fiber. The process uses a hybrid cellulose acetate butyrate (CAB) system, with CAB as a matrix material. By extruding in-situ micro or submicrofibrillar CAB and polymers (polyolefin, polyesters, and proteins) into regular size fibers, CAB serves as a sacrificial matrix and other polymers as micro/nano-fibrills in the matrix in coarse fiber form. After removal of CAB with acetone extraction, micro, as well as, submicro fibers can be produced.


  • Producing nano, micro or submicro fibers from polyester, polyolefin, and many other polymers
  • Biomaterials including tissue engineering in bio-medical applications, functional textiles, filtration media and nano sensors


  • CAB is recyclable and reusable
  • Produce nanofibers faster than current technologies
  • Mass produce nanofibers in continuous yarn forms
  • Possible to make woven fabrics from the nanofibers (current processes can only make non-woven fabric)

Patent Status

Country Type Number Dated Case
United States Of America Issued Patent 8,105,682 01/31/2012 2006-682


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  • Sun, Gang
  • Wang, Dong

Other Information


Textiles, Submicron fibers, Nanofibers, Polypropylene microfibers, Cellulose Acetate Butyrate (CAB), Biocompatible, Tissue engineering

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