Air Force Scientists Study Artificial Silk for Body Armor, Parachutes
Artificial silk fibers such as those shown here can be woven into sizeable, flexible fabrics using existing textile manufacturing methods. Air Force photo by Donna Lindner
WRIGHT-PATTERSON AIR FORCE BASE, Ohio -- Who doesn’t like to feel warm in the winter and cool in the summer?
Inspired by the qualities of fibers found in nature, scientists at the Air Force Research Laboratory, headquartered here, and Indiana’s Purdue University are experimenting to develop a functional fiber that can be woven into sizeable, flexible fabrics using existing textile manufacturing methods.
Researchers are studying the cooling and temperature regulation properties of natural silk in order to apply it to synthetic fibers such as artificial spider silk, which is both stronger than the polymer known commercially as Kevlar and more flexible than nylon.
Silk exhibits passive radiative cooling properties, meaning that it radiates more heat than it absorbs when in direct sunlight. On hot summer days, silk drops 10-15 degrees Fahrenheit when compared to reflective materials.
The cooling fabric is of tremendous potential benefit to the warfighter wearing body armor.
Body armor and parachutes are two articles in line to be constructed with artificial spider silk. Body armor is burdensome due to its heavy weight and the non-breathing material they are fabricated with. Parachutes constructed of the new material are stronger and able to carry larger payloads.
Estimates indicate that, while artificial spider silk may initially cost twice as much as Kevlar, the product’s minimal weight, incredible strength, elasticity and potential adaptability for other needs are characteristics that enhance its salability.
Aiding Warfighters’ Comfort
“Making the warfighter more comfortable by enhancing body armor is just one of the many improvements my team hopes to make by studying natural silk,” said Augustine Urbas, a researcher in the Functional Materials Division of the AFRL’s Materials and Manufacturing Directorate.
Urbas added, “Understanding natural silk will enable us to engineer multifunctional fibers with exponential possibilities. The ultra-strong fibers outperform the mechanical characteristics of many synthetic materials as well as steel. These materials could be the future in comfort and strength in body armor and parachute material for the warfighter.”
Tents for forward operating bases could be composed of the natural material. This would enable the warfighter to work in a cooler environment.
Processing Silk Protein
Fibroin, a silk protein secreted by the silkworm, can be processed into a lightweight material for fabricating artificially engineered synthetic and optical materials.
The structured optical materials can reflect, absorb, concentrate or split light enabling a material to perform differently in a specific situation.
Understanding light transport and heat transfer will lead to various innovations. According to AFRL researchers, learning from silk to assist with developing material synthesis and design processes in the future is a great opportunity.Inspired by the qualities of fibers found in nature, scientists at the Air Force Research Laboratory, headquartered here, and Indiana’s Purdue University are experimenting to develop a functional fiber that can be woven into sizeable, flexible fabrics using existing textile manufacturing methods.About this Publication: All information regarding non-federal, third party entities posted on the HDIAC website shall be considered informational, aimed to advance the Department of Defense (DoD) Information Analysis Center (IAC) objective of providing knowledge to the Government, academia, and private industry. Through these postings, HDIAC’s goal is to provide awareness of opportunities to interact and collaborate. The presence of non-federal, third party information does not constitute an endorsement by the United States DoD or HDIAC of any non-federal entity or event sponsored by a non-federal entity. The appearance of external hyperlinks in this publication and reference herein to any specific commercial products, processes, or services by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or HDIAC. HDIAC is a DoD sponsored IAC, with policy oversight provided by the Under Secretary of Defense for Research and Engineering (USD (R&E)), and administratively managed by the Defense Technical Information Center (DTIC). For permission and restrictions on reprinting, please contact email@example.com. Any views or opinions expressed on this website do not represent those of HDIAC, DTIC, or the DoD.