定向输水Janus织物基集水帆结构成形与表征

Structural Fabrication and Characterization of Janus-fabric Sail With Directional Water Conveyance

为解决部分地区淡水资源供应不足的问题,受自然界集水生物启发,研究了一款具有定向水运输功能的Janus集水帆,并对其结构与性能进行了表征;采用集雾装置对所制备的Janus织物进行集雾和相关性能稳定性测试,探讨了Janus织物制备参数中的具有疏水功能的氟碳化合物共聚物处理时间、高锰酸钾氧化时间、亲水整理液质量浓度和SiO2质量分数对集水效果的影响。结果表明:采用漂浮法所制备的Janus织物耐摩擦和耐水洗性能良好,具有单向导湿性,能够使采集到的雾滴加速从织物疏水侧向亲水侧转移,从而使暴露于雾源的疏水侧保持新鲜干燥,并收集到更多雾滴。当氟碳化合物共聚物处理时间为20 min,高锰酸钾氧化时间为2 h,聚醚改性硅油(亲水作用)质量浓度为80 g/L,亲水整理液中SiO2质量分数为0.8%时,Janus织物2 h内集水量最大,为1240 g/m^(2)。

In order to solve the problem of insufficient freshwater supply in some regions,and inspired by natural water harvesting organisms,this paper studies a Janus water harvesting sail with directional water transportation function,and characterizes its structure and performance.A mist collection device is used to conduct mist collection and related performance stability tests on the prepared Janus fabric.The effects of the treatment time of fluorocarbon copolymer with hydrophobic function,potassium permanganate oxidation time,hydrophilic finishing solution mass concentration,and SiO2 mass fraction on the water collection effect in the Janus fabric are explored.The results show that the Janus fabric prepared by the floating method performs well in abrasions and water washing resistance tests,and has unidirectional moisture conductivity.It can accelerate the transfer of collected droplets from the hydrophobic side to the hydrophilic side of the fabric,thereby keeping the hydrophobic side exposed to the fog source fresh and dry,and collecting more droplets.When the treatment time of fluorocarbon copolymer is 20 minutes,the oxidation time of potassium permanganate is 2 hours,the mass concentration of polyether modified silicone oil(hydrophilicity)is 80 g/L,and the mass fraction of SiO2 in the hydrophilicity finishing solution is 0.8%,the Janus fabric has the maximum water collection within 2 hours,which is 1240 g/m^(2).