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.
Highlights
With the development of economy and improvement of people0 s living standard, the function textiles have gradually been widely used in various industries and human life [1,2,3]
The chemical structure of CPN-PDMS was studied by Fourier transform infrared spectroscopy (FTIR) analysis
The chemical structure of CPN-PDMS was characterized by FTIR
Summary
With the development of economy and improvement of people0 s living standard, the function textiles have gradually been widely used in various industries and human life [1,2,3]. Cotton fabrics have acquired wide applications in the realm of clothing, house furnishing, industrial and military applications [4,5,6,7]. Cotton fabrics have certain shortcomings such as high flammability, and poor hydrophobicity [1,8], which can lead to fire accident and limit its further application. It is of great necessity to confer cotton fabrics with flame retardancy and water repellency. In the past few decades, halogen-based and formaldehyde-based flame retardants have been widely used to improve the flame retardancy of cotton fabrics in terms
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