Purification of Polyphenols from Green Tea Leaves and Performance Prediction Using the Blend Hollow Fiber Ultrafiltration Membrane

Hollow fiber–based ultrafiltration is used as a tool to enhance purity of polyphenols and in particular epigallocatechin gallate (EGCG), from microfiltered green tea leaves. Polysulfone-polyvinylidene fluoride (PVDF) blend was used to prepare the hollow fibers and membrane M-3 having 6-wt% PVDF in polymer solution with 30-kDa molecular weight cut off, permeability 17.7 × 10−11 m/Pa s with an average pore radius 5.3 nm, was identified as the...