State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, China.
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, China.
J Colloid Interface Sci. 2022 Feb;607(Pt 2):2019-2028. doi: 10.1016/j.jcis.2021.10.021. Epub 2021 Oct 7.
In order to meet the rapidly growing demand of multi-functional fabric, a super-hydrophobic flame retardant coating for cotton fabric with superior washability and abrasion resistance was prepared. Flame retardant finishing agent P, P-diphenyl-N-(3-(trithoxysilyl) propyl) phospinic amide (DPTES) and hydrophobic finishing agent polydimethylsiloxane @silicon dioxide (PDMS@SiO) were fixed on the surface of cotton fabric by a simple sol-gel technology in combination with convenient brush-coating process. The coated cotton fabric was capable of self-extinguishing a flame, and the Limiting Oxygen Index (LOI) increased from 18.0% for the control cotton fabric to 26.0% for the treated one at weight gain of 30.3%. The water contact angle (WCA) of C3-PDMS-silica is around 154°, and the slip angle is 8°. In addition, the treated cotton fabric exhibits anti-washing and self-cleaning ability due to the superhydrophobic feature and superior friction resistance. The C3-PDMS-silica sample with excellent char-forming ability, as shown by thermogravimetric analysis (TGA), leading to outstanding flame retardancy. A composite char layer was constituted with char residues and ceramic layer during the combustion of inorganic silicon, which plays the role of heat insulation and flame retardant.
为满足多功能织物的快速增长需求，采用简便的刷涂工艺，结合溶胶-凝胶技术，在棉织物表面固定阻燃整理剂 P、P-二苯基-N-(3-(三甲氧基硅基)丙基)次膦酰胺(DPTES)和疏水剂聚二甲基硅氧烷@二氧化硅(PDMS@SiO)，制备出具有优异耐洗性和耐磨性的超疏水阻燃涂层。涂覆后的棉织物能够自熄火焰，增重 30.3%时，极限氧指数（LOI）从对照棉织物的 18.0%提高到 26.0%。C3-PDMS-二氧化硅的水接触角（WCA）约为 154°，滑动角为 8°。此外，由于具有超疏水特性和优异的耐摩擦性能，处理后的棉织物表现出良好的耐洗性和自清洁能力。热重分析（TGA）表明，C3-PDMS-二氧化硅具有优异的成炭能力，从而表现出出色的阻燃性能。在无机硅的燃烧过程中，形成了由炭残留物和陶瓷层构成的复合炭层，起到隔热和阻燃的作用。
