Study On High Performance Interpenetrating Polymer Network Pervaporation Membrane For Recovery Of Butanol

With the development of science and technology,the main source of energy(oil,coal,natural gas)that mankind mainly relies on will dry up,and in order to the long-term development of energy,countries have paid more and more attention to the research of renewable energy.According to the latest version of "The BP World Energy Statistics Yearbook".All energy consumption in the world was 13.147 billion tons of oil equivalent by 2015,renewable energy,accounting for 2.70%(355 million tons of oil equivalent),have increased 15.9%than 2014.Butanol has been one of the most potential biofuel for it has several advantages over other biofuels including higher volumetric energy density,better hydrophobicity and better compatibility with gasoline,which is favored by majority of researchers.The concentration of butanol produced by fermentation is so low that bio-butanol can't be used as fuel in large-scale.Therefore,That recovering butanol from its dilute solution efficiently is considered to be one of the most promising technique.PV is membrane separation method that has high selectivity and low energy consumption,in addition,PV is simple to operate and to enlarge technology.so which is well suited for recovering mixed solvent of low concentration.Silicone rubber is the most common membrane material for separating organic solvents,but the performance of pure silicone rubber pervaporation membranes is limited.In order to improve PV performance of silicone rubber membranes,modifiying silicone rubber is one of the important methods.In this paper,a high-performance pervaporation membrane for the separation of butanol and water system is developed based on the mechanism of pervaporation,the main content as follow:1.Methyl acrylate and hexafluorobutyl acrylate were selected as the monomer for forming an interpenetrating polymer network with polydimethylsiloxane,according to the different mass ratio of monomer and polymer,10 kinds of PV membrances were prepared for recovery of bio-butanol from its dilute aqueous solution.2.The membranes were characterized by FTIR,TG,DSC,DMA,WCA,SEM and swelling experiments in butanol and water and PV.experiments for recovery butanol,all results of characterization and PV proved that interpenetrating polymer network has been successfully synthesized when monomer is smell,enhanced the PV performance,which also proved that monomer were so large that occur the phase separation and impaired the PV performance.In addition,the effects of temperature,concentration and ratio of membrane polymer on the pervaporation performance were studied,3.For the interpenetrating polymer network system formed by methyl acrylate and silicone rubber,the optimum conditions for pervaporation performance are as follows:when the content of methyl acrylate monomer is 10%of the whole polymer and the temperature is 70 ?,The optimum concentration was 1.03 wt.%,The selectivity was 41.99 and the permeation flux was 922.90 g/m2h.For the interpenetrating polymer network system formed by hexafluorobutyl acrylate and silicone rubber,the optimum conditions for pervaporation performance are as follows:when the content of hexafluorobutyl acrylate monomer is 30%of the whole of the polymer and the temperature is 70 ?,The concentration of butanol in the feed solution was 2.75 wt%,and the best result was 64.4 and the permeation flux was 1519.6 g/m2h.Compared with the results of the recent published literature,the separation factor and the permeation flux have greatly improved,and have relatively large practical application prospect.