【摘要】 通过铜电沉积+原位氧化+化学修饰的方法在2 000目不锈钢网基体上制备了超疏水不锈钢基膜(SH-SSM)，并应用于气隙式膜蒸馏(AGMD)。采用扫描电镜、接触角测量仪、X射线衍射仪和X射线能谱仪对所制备的疏水表面进行表征。探究了最佳的化学修饰条件及所制备的SH-SSM在气隙式膜蒸馏中的运行情况。结果表明，当正十二硫醇用量为2μL/cm~2时能够制备出水接触角为164°、滚动角为1.7°的超疏水表面。SH-SSM在气隙式膜蒸馏组件处理30 g/L NaCl溶液的过程中显示出良好的稳定性和耐用性，运行10 h内的膜通量维持在4.5 kg/(m~2·h)左右，盐的截留率大于98.5%。更多还原

【Abstract】 A superhydrophobic stainless steel based membrane(SH-SSM) was prepared on a 2000-mesh stainless steel substrate by copper electrodeposition, in-situ oxidation, and chemical modification successively, and then applied to air-gap membrane distillation(AGMD). The hydrophobic surface prepared was characterized by using scanning electron microscope,contact angle meter, X-ray diffractometer, and energy-dispersive spectrometer. The optimal conditions for chemical modification and the AGMD process with SH-SSM were studied. The results showed that a superhydrophobic surface with a contact angle of 164° and a sliding angle of 1.7° against water could be prepared when the dosage of n-dodecanethiol was 2 μL/cm~2. The SH-SSM showed good stability and durability during the AGMD test with a 30 g/L NaCl solution as feed, and the membrane flux was maintained at about 4.5 kg/(m~2·h) and the salt rejection was greater than 98.5% after 10 hours of running.更多还原