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Quality Fabric Of The Month

Aluminated Textiles

Dynamic Adsorbents Inc. is incorporating alumina adsorbent technologies into nonwoven textile products.

Janet Bealer Rodie, Managing Editor

D ynamic Adsorbents Inc. (DAI), Atlanta -- a purifying and separations company that produces customized alumina and silica gels used in industrial purification, environmental cleanup, disease control and other applications -- is launching its first textile products impregnated with activated alumina. DAI is working with Waco, Texas-based nonwoven fabrics manufacturer and converter Hobbs Bonded Fibers, which applies activated alumina to needlepunched substrates and produces end products for DAI.

Activated alumina is a natural adsorbent compound that can be modified to suit a wide range of applications, such as disease control, environmental cleanup, food purification and others. In contrast to silica, alumina is crystalline and has multiple crystalline formations. "Each transformation state of the crystal has a different selectivity -- far more selectivity than silica gel offers," said Dr. Mark Moskovitz, DAI's president and chief technology officer, noting that aluminas can be tuned to suit a specific application.

QFOM
Dyna-Swipe™, a highly absorbent cotton wipe impregnated with DAI's Dyna-Cidal™ compound, can be used to disinfect surfaces in healthcare and other environments.

In Dyna-Mask , a face mask made with polyester, and Dyna-Swipe , a wiping product made with a highly absorbent cotton, the fabrics are impregnated with DAI's Dyna-Cidal™ anti-biocontaminant, a patented, proprietary, nontoxic formulation in which a special type of silver is contained within the pores of a specially formulated alumina bonded to the fabric. Moskovitz said the compound is covalently bonded to the fabric, so it doesn't leach off; and the combination of the silver, alumina and a reduction/oxidation agent enhances its cell kill properties.

Dyna-Cidal, which also has non-textile applications, has received CE certification for its anti-biocontaminant claims, and both textiles are sold in countries that accept that certification. Moskovitz said Dyna-Mask -- which comprises several layers of the treated nonwoven, providing increased surface to kill the offending pathogens -- is the only face mask that is CE-certified to kill the H1N1 virus. It also has been shown to kill on contact bacteria such as methicillin-resistant Staphylococcus aureus, anthrax, E. coli and others as well as most other viruses. DAI is seeking U.S. Environmental Protection Agency and National Institute for Occupational Safety and Health approval to market both Dyna-Mask and Dyna-Swipe in the United States.

Dyna-Swipe -- which has applications in healthcare as well as for public environments, where uses include disinfecting airplane seats, rental cars and other surfaces -- differs from other antimicrobial wipes in that it contains no alcohol, which can harm some surfaces. The oil inherent in the cotton acts as a vehicle to pick up the pathogens, and the antimicrobial property is not affected by water, Moskovitz said, adding, "We believe that because of the oil in the cotton, it may leave a residual coating on the surface that extends the benefit of sterilization." The swipe is now undergoing testing to prove that theory.

QFOM2
Dyna-Cidal (blue spheres) adsorbs and kills bio-contaminants (yellow spheres) with which it comes in contact.

In response to the recent oil spill in the Gulf of Mexico, DAI developed Dyna-Aqua Oil Sorb , an alumina-impregnated, highly absorbent cotton nonwoven that absorbs crude oil and adsorbs the toxic volatile organic compounds (VOCs) and dispersants that have sickened workers involved in the cleanup. According to DAI, the fabric can bind up to 3 gallons of oil per pound of treated cotton -- a higher rate than any other method currently available. The oil thus absorbed can be wrung out of the cotton and sold.

"Our special cotton will have the highest absorption properties," Moskovitz said. "The adsorbent alumina will act as an attraction for the oil and also will act to contain the VOCs." He also said DAI is looking for an even more absorbent cotton to increase the volume of oil trapped. 


For more information about DAI's textile products, contact Dr. Mark Moskovitz 770-817-0123; info@dynamicadsorbents.com.


July/August 2010

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