Synthetic and natural membranes are commonly used for filtration applications. Membrane materials most often used include regenerated cellulose, cellulose acetate, polysulfone, polycarbonate, polyethylene, polyolefin, polypropylene, and polyvinylidene fluoride.
The regenerated cellulose in Cellu•Sep® is derived from cotton: Cotton linters are dissolved in a solution and spread into flat sheets or extruded into tubes. The material is treated with glycerin to prevent the pores from collapsing and air dried at a certain temperature and pressure to form a rigid membrane. Cellu•Sep regenerated cellulose membrane has a symmetric pore structure which allows small molecules to migrate in either direction, making it ideal for experimental purposes.
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