Synthesis of a Novel Linear α, ω-Di (Chloro Phosphoramide) Polydimethylsiloxane and Its Applications in Improving Flame-Retardant and Water-Repellent Properties of Cotton Fabrics

Abstract

A novel linear α, ω-di (chloro phosphoramide)-terminated polydimethylsiloxane (CPN-PDMS) was successfully synthesized and utilized as a formaldehyde-free water-repellent and flame-retardant for cotton fabrics. The flame retardancy of treated cotton fabrics was estimated by limiting oxygen index (LOI) test, vertical flammability test, and cone calorimetry test. The cotton fabrics treated with 350 g/L CPN-PDMS obtained excellent flame retardancy with an LOI value of 30.6% and the char length was only 4.3 cm. Combustion residues were studied using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS) analysis. Results show that CPN-PDMS can effectively enhance water repellency and fire resistance of cotton fabrics. Furthermore, the breaking strength test and the whiteness test strongly prove that the tensile strength and whiteness of the treated cotton fabrics were slightly lower than that of the pure cotton fabrics. The wash stability test showed that after 30 laundering cycles, the treated cotton fabrics still had an LOI value of 28.5% and a water-repellent effect of grade 80, indicating that CPN-PDMS was an excellent washing durability additive. In summary, these property enhancements of treated cotton fabrics were attributed to the synergistic effect of silicon-phosphorus-nitrogen elements in CPN-PDMS.

Flame‐retardant, phosphorous‐based polyurethane triazoles via solvent‐free and catalyst‐free azide–alkyne cycloaddition and their cure kinetics

“…The formation of triprop‐2‐ynyl phosphate was confirmed by the peaks at 3292 cm −1 , 2129 cm −1 that represent CCH stretching vibrations and by the significant peaks at 992, 947, and 1265 cm −1 that represent PO stretching frequencies and PO stretching frequencies, respectively 40,41 . The disappearance of peak at ca.…”

A strategy to construct multifunctional ammonium polyphosphate for epoxy resin with simultaneously high fire safety and mechanical properties

“…Generally, most deaths resulted from the smoke during the fire hazard [43][44], hence, SPR, total smoke production (TSP), COP and CO2 production rate (CO2P) were the important parameters to evaluate the fire safety of EPs [45]. Here, the SPR and COP of 5ZIF-67@APP/EP dropped to 0.14 m 2 /s, 0.01 g/s, respectively, which decreased by 46.2% and 57.4% compared to APP/EP, implying the ZIF-67@APP/EP presented excellent smoke suppression.…”

Preparation and Mechanism of Flame-Retardant Cotton Fabric with Phosphoramidate Siloxane Polymer through Multistep Coating

“…In the last decades, numerous researchers have focused on the investigation of flame-retardant textiles and various preparation methods have been reported [ 3 ]. Among these methods, sol-gel technique has been recognized as an excellent scientific approach to rendering textiles with different functional properties [ 4 , 5 , 6 ], such as flame retardancy [ 7 , 8 ], antibacterial properties [ 9 , 10 ], anti-wrinkle [ 11 , 12 ], and superhydrophobicity [ 13 ]. In this process, siloxane bonds are firstly hydrolyzed to silanol groups and then connected to cellulose substrate to form hydrogen and covalent linkages [ 14 ].…”