A novel water repellent and flame retardant for cotton fabrics,
Iodine butyl-N-sulfonate amino polysiloxane [(IB-N-SA) PDMS] was
successfully synthesized and it was characterized by FT-IR. The grade
of water repellency of treated cotton fabric was 90 and the water
contact angle increased from 88.371 to 124.491. The flame retardancy
of treated cotton fabric was enhanced with a LOI value of 30.9%.
Moreover, the combustion behaviors of the cotton fabric treated with
(IB-N-SA) PDMS were evaluated by cone calorimeter. The results
showed that the TTI value of the treated fabric increased and the
values of HRR, THR, EHC, Mass loss decreased. It demonstrated that
(IB-N-SA) PDMS favored the char formation of cotton fiber during
combustion and the treated cotton fabric generated less combustion
heat and obtained better flame retardancy which can be confirmed
by the increase of FPI value and the decrease of CO2/CO ratio.