Research on improving the acid-alkali barrier performance of outer fabric of firefighting suits
Using immersion rolling method,the outer fabrics of firefighting suits were treated with fluorinated and non fluorinated finishing agents.The effects of finishing agent mass concentration and immersion time on the wettability and acid-alkali resistance of fabrics were studied,and the process parameters were optimized.The results showed that as the mass concentration of finishing agent and immersion time increased,the wettability of fabrics showed an overall trend of first increasing and then tending to plateau.The optimized mass concentration of non fluorinated finishing agent was 80 g/L,and the immersion time was 30 minutes.The optimized mass concentration of fluorinated finishing agent was 60 g/L,and the immersion time was 45 minutes.Under optimized process parameters,the fabric treated with non fluorinated finishing agent had a maximum water contact angle of 141.7° and an alkali contact angle of 142.5°,which had good anti wetting and alkali resistance.The water contact angle of the fabric treated with fluorinated finishing agent could reach up to 155.4°,and the alkali contact angle was 146.1°.The acid and alkali standard penetration time was 8 min and 17 min,respectively.The anti acid and alkali penetration performance was significantly improved,and the effect was better than that of fabrics treated with non fluorinated finishing agents.By reducing the surface energy of fabrics and constructing super hydrophobic surfaces,it was possible to reduce the dissolution and perforation of liquid hazardous chemicals on the outer fabric of firefighting suits,and improve the acid-alkali barrier performance.
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