阻燃超疏水棉纤维的制备及性能

将氢氧化镁(Mg(OH)₂)凝胶沉积到棉纤维上,以提高棉纤维表面粗糙度和阻燃性能,随后将含有Mg(OH)₂的棉纤维浸渍到聚二甲基硅氧烷(PDMS)溶液,获得阻燃超疏水棉织物。 并对棉纤维进行了傅里叶变换红外光谱仪(FTIR)、扫描电子显微镜(SEM)、疏水性、热稳定性、阻燃性能和耐久性测试。 结果表明,Mg(OH)₂负载到织物上,使得织物表面具有一定的微/纳米结构,形成了粗糙涂层。 当Mg(OH)₂浓度为1.0 mol/L时,Mg(OH)₂/PDMS改性的织物接触角(CA)可达158°,极限氧指数(LOI)提升至24.5%,导热系数为0.0525 W/(m·K), 具有超疏水和阻燃性能。 整理后织物经过20次洗涤,100次磨擦,极端条件处理后,CA仍大于150°,LOI值高于23%,显示了较好的耐久性。

Preparation and Properties of Superhydrophobic and Flame-Retardant Cotton Fabric

Magnesium hydroxide(Mg(OH)2)was incorporated into cotton fiber to build surface roughness and improve flame-retardancy of cotton fabric.Subsequently,flame-retardant and superhydrophobic cotton fabric was prepared by further dip-coating of cotton fabric with polydimethylsiloxane(PDMS)solution.Fourier transform infrared spectrometer(FTIR)and scanning electronic microscopy(SEM)analysis confirmed that the pristine cotton fabrics is successfully modified by Mg(OH)2 and PDMS.The hydrophobicity,thermal stability,flame retardant and durability of the treated cotton fibers were tested.The results indicated that Mg(OH)2 is loaded on the fabric,which makes the surface of the pristine cotton to have a certain micro-nano structure and forms a rough coating.When the concentration of Mg(OH)2 was 1.0 mol/L,Mg(OH)2/PDMS coated fabric had contact angle(CA)of 158°,the limit oxygen index(LOI)of 24.5%,and the thermal conductivity of 0.0305 W/(m·K),suggesting excellent superhydrophobicity and flame-retardant performance.After 20 times of washing,100 times of friction and under extreme processing conditions for coated fabric,its CA was greater than 150°,its LOI value was higher than 23%,revealing that the coated fabric has an excellent durability.