EXTRACTANT FOR ULTRA-HIGH MOLECULAR WEIGHT PE FIBERS AND MEMBRANES, AND METHODS OF PREPARING AND USING THE SAME

Provided are an extractant for ultra-high molecular weight PE fibers and membranes, and methods of preparing and applying the same, relating to the technical field of polyethylene preparation. An extractant for ultra-high molecular weight PE fibers and membranes comprises an ionic liquid, which is one or more of an imidazolium tetrafluoroborate salt, a betaine salt, an imidazolium acetate salt, an imidazolium dicyanamide salt, an imidazolium ethyl sulfate salt, an imidazolium bis (fluorosulfonyl) imide salt and a bis((trifluoromethyl) sulfonyl) imide salt. The extractant of the present invention is characterized by a reasonable and scientific formula, high dispersibility and stability, a good degreasing effect on ultra-high molecular weight polyethylene fibers and membranes and excellent effects of subsequent separation and recycle of white oil, and has the advantages of convenient preparation of raw materials, simple process steps, low requirements for apparatuses, high operability, and suitable for industrial production.