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1012791 
Technical Report 
Application of Nanofiber Technology to Nonwoven Thermal Insulation 
Gibson, P; Lee, C 
2006 
Army Soldier Systems Command 
NTIS/02030055 
GRA and I 
GRA and I 
Conference paper. so ADM002075. Presented at the Army Science Conference (25th) held in Orlando, FL on 27-30 Nov 2006. The original document contains color images. ber technology (fiber diameter less than 1 micrometer) is under development for future Army lightweight protective clothing systems. Nanofiber applications for ballistic and chemical/biological protection are being actively investigated, but the thermal properties of nanofibers and their potential protection against cold environments are relatively unknown. Previous studies have shown that radiative heat transfer in fibrous battings is minimized at fiber diameters between 5 and 10 micrometers. However, the radiative heat transfer mechanism of extremely small diameter fibers of less than 1 micrometer diameter is not well known. Previous studies were limited to glass fibers, which have a unique set of thermal radiation properties governed by the thermal emissivity properties of glass. The authors are investigating the thermal transfer properties of high loft nanofiber battings composed of carbon fiber and various polymeric fibers such as polyacrylonitrile, nylon, and polyurethane. Thermal insulation battings incorporating nanofibers could decrease the weight and bulk of current thermal protective clothing, and increase mobility for soldiers in the battlefield. 
Heat transfer; Nanotechnology; Polyester fibers; Thermal insulation; Carbon fibers; Acrylonitrile polymers; Thermal radiation; Army equipment; Glass fibers; Lightweight; Cold weather; Compression; Protective clothing; Symposia; Diameters; Aerogels; Radiative transfer; Nanofibers; Nanofiber battings; Nanofiber technology; Nonwoven materials; Polymeric fibers; Polymer nanofibers; Down fibers; Wool fibers; Primaloft; Polarguard; Thinsulate; Fiber aerogel composites; Fiber diameter; Electrospun polyacrylonitrile