Fabrication Of Underwater Superoleophobic Membranes For Oil/Water Separation

Environmental issues have become a major challenge facing humanity,smog,sewage,solid waste,emissions,pollution and so on,are serious threats to the Earth’s environment and human health.This appeared every issue,is an outgrowth of the development of mankind itself,every problem solved,will make hard efforts for technology workers.Crude oil,marine oil spills,sewage caused by large amounts of oily wastewater has become a major environmental challenge.Research shows that,worldwide,every year about 3.2 billion metric tons of oil into the water in the form of oil-containing wastewater,petroleum,chemical industry,iron and steel,coke,home appliances,machinery manufacturing and food processing industry,where water containing oil of direct contact with the oil.In this work,three different methods for oil/water separation are used which are:the pore size tailoring of TiO2 coated filter paper,Electrospinning method underwater superoleophobic&under oil superhydrophobic cigarette filter coated mesh(CFCM),and pine cone powder(PCP)coated filter paper on the surface of alumina substrates was studiedFirst of all,TiO2 coated filter paper is introduced which has superhydrophilic and underwater superoleophobic properties for the separation of oil containing water.Designed filter paper is used to introduce gravity driven oil-water separation for a number of oil-water mixtures.The membrane is fabricated with the help of water recycling vacuum pump with the mixture of TiO2(NPs)and waterborne polyurethane(PU).The separation efficiency is found to be greater than 99.0%and stable recyclability after several separation cycles.This membrane has great potential for the separation of oil in water emulsion.The TiO2 coated filter paper can also be applicable for large surface area and design large amount of oil-water separation.The properties like energy efficiency and consistent permeate quality make membrane based method attractive for the separation of oil-water mixture.However,without any further chemical modification induced underoil superhydrophobic&underwater superoleophobic cigarette filter coated mesh(CFCM)was demonstrated for the first time for oil-water separation that was fabricated by electrospinning method with Cigarette Filter(CF)and nanoparticles of SiO2 mixtures on stainless steel mesh.Among others,electrospinning is a low cost,continuous,scalable nonmanufacturing technique that has been extensively used for producing continues nano-microfibers of a large variety of natural and synthetic polymer,polymer derived carbon,metals,metal oxides and ceramic.The as-prepared CFCM showed a high separation efficiency of above 99%.Herein,we demonstrate highly efficient method:an underwater superoleophobic pine-cone powder and waterbom polyurethane(PU)mixture on filter paper is fabricated by using water recycling vacuum pump and preparing(PCPF).To the best of our knowledge,its first time that underwater superoleophobicity pinecone powder coated filter papers show good water affinity and powerful underwater superoleophobicity.Since water passing through the pinecone powder coated filter paper quickly and oil remained exclusively on the coated filter paper.This method is eco-friendly,low cost,easy to install non-toxic and not time consuming.The(PCP)coated filter paper gives the best water affinity with great underwater superoleophobicity.The gravity-driven force is used during the oil-water separation experiments and it shows 99.0%water-oil separation efficiency.