Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/15/2010
Publication Date: 4/24/2010
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.