阻燃超疏水涤/棉混纺织物的制备及其性能

为实现涤/棉混纺织物同时具有阻燃和超疏水功能，以生物基的壳聚糖(CS)和植酸(PA),采用层层自组装方法在涤/棉混纺织物上构建阻燃涂层，并采用含氟的超疏水整理剂处理涤/棉混纺织物。测定了织物的阻燃和超疏水性能及热稳定性；并观察了阻燃处理前后织物及其垂直燃烧后残炭的外观形貌。结果表明：经CS/PA阻燃处理后织物的极限氧指数(LOI值)可以达到30.6%,经超疏水处理会使其LOI值有所降低，但静态接触角可以达到150°以上，可获得阻燃超疏水功能，并具有一定的水洗耐久性；织物经阻燃超疏水处理，有利于提高其高温稳定性和促进其成炭，CS/PA阻燃涂层可发挥膨胀阻燃作用。

Preparation and properties of flame retardant and superhydrophobic polyester/cotton fabrics

In order to achieve the flame retardancy and super hydrophobicity for polyester/cotton fabrics simultaneously, bio-based chitosan (CS) and phytic acid (PA) were used to construct the flame retardant coating on the polyester/cotton fabric by using layer-by-layer assembly method. The fluorinated superhydrophobic finishing agent was used to treat the polyester/cotton fabrics, and limiting oxygen index (LOI), vertical burning test and water static contact angle were used to determine the flame retardancy and super hydrophobicity of treated polyester/cotton fabrics. Thermogravimetric analyzer was used to investigate the thermal stability of polyester/cotton fabrics, and scanning electron microscope (SEM) was used to view the morphology of polyester/cotton fabrics before and after treatment and their char residues after vertical burning. The results show that the LOI value of polyester/cotton fabric can reach 30.6% after flame retardant treatment by CS/PA coating, the static contact angle could reach over 150°, but the LOI would be reduced after superhydrophobic finishing. Polyester/cotton fabrics could achieve the flame retardancy and super hydrophobicity and a certain washing durability. The flame retardant and superhydrophobic treatment of polyester/cotton fabrics could improve their thermal stability at high temperature and promote the char formation. The CS/PA coating could act through intumescent flame-retardant action.