Preparation of Filter Paper Composite by Laser Printing for Oil-water Separation and Solar-thermal Desalination

For effective treatment of oil and salt contaminated water,filter paper composites （FPCs） with hydrophobic and oleophilic properties and photothermal conversion effect were prepared by using laser printing method.The microstructure and chemical composition of the material were characterized,and the oil-water separation efficiency and photothermal conversion performance of the material were measured.The results showed that FPCs material were rough and had hydrophobic and lipophilic properties.They could maintain excellent separation efficiency （99.3%）while separating oil-water mixtures with high throughput,and still maintain good separation capacity after 10 times repeated use.FPCs also had excellent photothermal conversion performance.Under a simulated sunlight（1 kw/m²）,the evaporation rate of water would reach 1.06 kg h-1m^-2 and the light energy conversion efficiency could be improved（η） Up to 75.8%,and the salinity decreased from 105 mg/L to 1 mg/L after desalination.The results would provide a theoretical basis for the treatment of oily and saline wastewater.