FILTERS FOR OIL-WATER SEPARATION HAVING ZWITTERIONIC POLYMERS COATED OR GRAFTED THEREON
申请人:Liu Lingyun
公开号:US20140209534A1
公开(公告)日:2014-07-31
A filter for the separation of oil and water from oil-water mixtures comprising a porous filter media, wherein the porous filter media has a zwitterionic polymer grafted or coated thereon. The zwitterionic polymers can be formed from zwitterionic monomers, the zwitterionic polymers having positive and negative charges in series on the same side chain; zwitterionic polymers formed from a mixture of cationic and anionic monomers, the zwitterionic polymers having positive and negative charges on two different side chains; and zwitterionic polymers formed from monomers with cationic-anionic pairs, the zwitterionic polymers having positive and negative charges in parallel on the same side chain