Fabrication of Ultra-High Molecular Weight Polyethylene Membrane and Evaluation of Physical Characteristics for Wastewater Treatment

摘要

A porous tubular-type ultra-high molecular weight polyethylene (UHMWPE) membrane with good filtration effect for turbid circulating water was designed and prepared. The physical-chemistry properties such as surface microstructure and tensile strength of tubular-type UHMWPE membrane were investigated. UHMWPE membrane consists of agglomerated particles with diameters of 127-229μm. The UHMWPE membrane has a porous structure with pore diameter of 40-152μm, which can enhance the permeability of UHMWPE membrane. The accumulation and distribution of oxide scale particles in UHMWPE membrane after having been used for 5 years were also analyzed. Oxide scale particles are mainly accumulated on the surface layer of UHMWPE membrane. And the fouling layer is about 2.052 mm. The accumulation of oxide scale particles decreases with the increase of distance from the inner surface of the UHMWPE membrane. The accumulation is about 0.96% at L = 0.342 mm, and the accumulation is about 0.36% at L - 2.052 mm in the UHMWPE membrane. UHMWPE membrane exhibits excellent antifouling property for long-term use.