Specialty Fabrics Review July 2023 - 12

[ BRIEFS ] swatches
How precious: USDA develops reusable cotton
antimicrobial wipes using silver particles
U
.S. Department of Agriculture's (USDA) Agricultural Research Service (ARS) researchers
have developed machine-washable cotton antimicrobial wipes that can be used at least
30 times for cleaning hard surfaces.
The nonwoven wipes begin with raw cotton. When put in a silver solution, the material
naturally produces silver nanoparticles inside the fibers through the oxidation of the cotton's
non-cellulose components. The silver particles create the wipes' antimicrobial properties,
and the particles being embedded in the fiber makes the wipe reusable.
In the researchers' trials, the wipes killed 99.9% of Staphylococcus aureus (aka staph) and
Pseudomonas aeruginosa, bacteria that can cause serious blood infections or pneumonia.
" The wipes regenerate their antimicrobial surface every time they are wet or washed because
the embedded nanoparticles act as a reservoir of silver ions, " says Sunghyun Nam, research
engineer at ARS's Cotton Chemistry and Utilization Research Unit in New Orleans, La.
The benefits of reusable wipes go beyond potentially reducing landfill waste, though that
is a significant one; the process also omits the scouring and bleaching pretreatments of the
cotton, which consume a large number of chemicals and amount of energy. The silver ions
being embedded in the cotton fibers-rather than the fibers just being a carrier substance-
also minimize nanoparticles leaching into the environment.
The research was published in the journal Molecules.
ARS researchers (from left)
Sunghyun Nam, Matthew
Hillyer and Pablo Salame
use the needle punching
process to produce washable
antimicrobial cotton wipes in
the nonwoven pilot plant at
the ARS Southern Regional
Research Center in New
Orleans. Photo: Crista
Madison/USDA ARS
RadiciGroup's new 100% castor bean yarn
among company's sustainability efforts
R
Biofeel®
Eleven yarn is made
from 100% castor bean oil.
The beans are grown on
semiarid land and do not
compete with food production.
After the oil is removed from
the beans, the remnants can
be returned to the soil as
fertilizer. Photo: © Tetiana
Kovalenko, Dreamstime.com
adiciGroup recently developed sustainable, recyclable yarn called Biofeel®
Eleven,
made from 100% castor bean oil.
Marco De Silvestri, sales and marketing head of the Advanced Textile Solutions Business
Area for the company, describes the yarn's properties as " low water absorption, increased
lightness and improved strength properties ... to produce fabrics that are both durable and
comfortable to the touch and skin. This translates into a wide range of applications, from
sportswear to workwear, from fashion garments to textiles for luxury cars. "
It can be dyed at the yarn production stage, providing greater color stability and using less
water and energy than after the fabric is woven.
Castor beans contain oil rich in ricinolein, which is the source of the biopolymer polyamide 11,
a bioplastic. Chemical company Arkema supplies the biopolymer.
Biofeel Eleven is the newest yarn in the company's lineup of products that are at least partially
bio-based, including: Biofeel PET, which is 30% Bio-MEG (monoethylene glycol) and comes from
sugarcane and other cellulosic waste; Biofeel PA nylon, which is 64% bio-based from sebacic
acid derived from castor beans; and Biofeel PLA, 100% bio-based and derived from polylactic
resin from " vegetable raw materials. "
The company has other sustainability initiatives. It also captures pre- and postindustrial
waste from its facilities and processes them at Radici EcoMaterials, formerly Zeta Polimeri, an
Italian company acquired by RadiciGroup three years ago. Radici EcoMaterials is Global Recycled
Standard certified, which ensures traceability of materials.
12 SPECIALTY FABRICS REVIEW / July 2023
http://www.Dreamstime.com

Specialty Fabrics Review July 2023

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Specialty Fabrics Review July 2023 - 1
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