Study On Preparation And Pervaporation Characteristics Of Novel Concentrated Emulsion Membrane

A novel pervaporation separation membrane was designed to preferably separate ethanol from water/ethanol mixture in this thesis. The membrane was composed of polyhedral particles, with the inter-particle gaps being micro-channels, which constituted the pathways for the diffusing species in addition to those inside the particles. Being larger in size, the ethanol is more difficult to diffuse and thus more difficult to be separated. The enlarged pathway would promote the movement of ethanol molecules. Silicon rubber was selected as the material of the membrane. The polyhedral particles were synthesized via concentrated emulsion polymerization.Firstly, the concentrated emulsion method, over 75% of volume fraction, was introduced into the polymerization of the cyclotetrasiloxane. The effect of various reaction conditions on the concentrated emulsion ring-opening polymerization of polydimethylsiloxane(PDMS) systems were investigated. And the...