چكيده به لاتين
In This Paper is tried to Presente a Polymer Solution Suitable Formulation for Ultrafiltration Continuous Membrane synthesis with MWCO Equal to 100 k Dalton with Phase-Separation Method in order to Osmosis Refinery Process. PVDF as Polymers and the Basic Additive O Have Been Used for Synthesizing Polymer Solution. Initially, the Effects of a Number of Suitable Solvents for PVDF Polymer such as L, M and N and a Mixture of Two of Them on Polymer Solution Have Been Evaluated. Additive Combination Has Been Used to Control the Size of the Pores, a Balanced Distribution of Pores in Membrane and an Acceptable Structure of the Membrane. To Achieve This, the Effect of the Mixture of Polymer Additive Q and Mineral Additive P each Independently with Additive O Was Put under Scrutiny. In addition, the Role of Solvent and its Effects on Solution Containing Additives Was Assessed. After a Comprehensive Verification of the Results, L Was Selected as Solvent and O and P Were Selected as Additives. As Next Step, the Behavior of Pure Water and Dextran 450K Rejection and the Effects of Additives, Especially P on Polymer Solution Were Predicted by Modeling the Behavior of Pure Water Flux Using Design Expert Software. In Prediction of the Behavior of Pure Water Flux, an Increase of Flux Due to the Increase of the Density of Additives Was Mentioned. High Density of Polymer in Solution Results in an Increase of Compression on the Surface of the Polymer Film. Consequently, the Additives Loose the Ability to Produce Pores with Suitable Length and Most of the Produced Pores Form on the Surface. But, in Predicting the Rejection Behavior of the Membrane, an Increase in the Density of P when the Density of Additive O in Solution is more Than 5 Percent doesn’t impose any Change on the Amount of Rejection. This Trend, However, is not Valid When the Density of Additive O in Solution Is Less than 5 Percent. In This Case, an Increase in the Density of P Leads to an Increase in Membrane Rejection. Finally, an Experiment Approved the Presented Model and Based on That, a Suitable Formulation for Producing 100 K Dalton Ultrafiltration Continuous Membrane Was Presented
Keywords: Ultrafiltration Continuous Membrane synthesis, Phase Separation, the Effect of Solvents, Additive Combination.
