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United States Department of Agriculture

Agricultural Research Service

Research Project: CHEMICAL MODIFICATIONS OF COTTON TEXTILES Title: Promising flame retardant textile in supercritical carbon dioxide

Authors
item Chang, Sechin
item Condon, Brian
item Smith, Jade
item Graves, Elena

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: March 15, 2010
Publication Date: April 24, 2010
Citation: Chang, S., Condon, B.D., Smith, J.N., Graves, E.E. 2010. Promising flame retardant textile in supercritical carbon dioxide. Meeting Abstract. CDROM. CELL 262. 1p.

Technical Abstract: Since carbon dioxide is non-toxic, non-flammable and cost-effective, supercritical carbon dioxide (scCO2) is widely used in textile dyeing applications. Due to its environmentally benign character, scCO2 is considered in green chemistry as a substitute for organic solvents in chemical reactions. Our preliminary attempts at flame retardant cotton fabrics treated with low cost inorganic formulations (urea and sodium phosphate) and a new piperazine phosphonates derivative in scCO2 were done successfully. Novel piperazine phosphonates and thiophosphonate derivatives were synthesized by a one step condensation reaction in a weak base condition and characterized by 1H and 13C NMR spectroscopy. The conditions of the innovative treatment method were optimized to improve add-ons (8-25%) at 1900 - 2400 psi and 80 - 100°C. The evidence of chemical penetrations on cotton fabrics was confirmed by FT-IR, EA and SEM, and some of the treated cotton fabrics (add-on: 10-25%) passed flammability tests such as, methenamine pill test, LOI, and vertical flame tests. In this paper, we will discuss the syntheses, processing, and flammability properties of these treated cotton fabrics.

Last Modified: 11/26/2014
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