对陶瓷膜进行4种表面改性(纳米粒子、纳米棒、磺化、多巴胺),并两种运行模式下(水循环与抽真空),观察改性膜对水蒸汽回收性能的影响。结果表明,在水循环模式下,多巴胺改性陶瓷膜对水蒸汽的回收性能优于磺化与纳米粒子改性膜,改性膜对水蒸气回收性能最好的膜为多巴胺改性陶瓷膜,在循环水温度为10℃,烟雾量1.8L/h,烟雾温度50℃时,多巴胺改性陶瓷膜回收水量达19.904L/m²·h。在抽真空模式下,多巴胺改性陶瓷膜在抽真空时对水蒸汽回收水量最好。在1.2L/h的烟雾量,烟气温度50℃,真空度为0.03MPa时,多巴胺改性陶瓷膜回收水量为14.154L/m²·h。将多巴胺涂层应用于有机膜聚四氟乙烯(PTFE),发现循环时间越长即多巴胺沉积时间越长,亲水性能越好,改性PTFE膜对水蒸汽的回收水量越高。

Four kinds of surface modification (nanoparticle,nanorods,sulfonated and dopamine) were carried out on the ceramic membrane under two operating modes (water cycle and vacuum) to observe the effect of modified membrane on water vapor recovery performance.The results shown that the dopamine-modified ceramic membrane had better water vapor recovery performance than sulfonated and nanoparticle modified membrane under water cycle mode.The dopamine-modified ceramic membrane had the best water vapor recovery performance.When the circulating water temperature was 10℃,the smoke volume was 1.8L·h^-1,and the smoke temperature was 50℃,the membrane had the best water vapor recovery performance,the water recovery reached 19.904L·m^-2·h^-1.In the vacuum mode,the membrane can recover the best water vapor.The water recovery was 14.154L·m^-2·h^-1 when the smoke volume was 1.2L·h^-1,the smoke temperature was 50℃,and the vacuum degree was 0.03MPa.It was found that the longer the circulation time,the longer the deposition time of dopamine,The better the hydrophilicity,the higher the water vapor recovery of the modified polytetrafluoroethylene (PTFE) membrane.