申请人:MILLIPORE CORPORATION
公开号:EP1470854A1
公开(公告)日:2004-10-27
A porous synthetic membrane suitable for conducting macromolecular fluid separations (e.g., protein filtration) is described. The ultraporous membrane comprises a surface-charge layer of crosslinked polymer, the crosslinked polymer being formed from a cellulosic polymer and a crosslinking reagent. The cellulosic polymer has substantial crosslinkable hydroxyl moiety content. The crosslinking reagent is a bi- or multi-functional epoxide capable of reacting with and binding to the cellulosic polymer's hydroxyl moieties and has the formula X(CH2)nY, wherein: n is an integer from 1 to 5; X is H2COCH or H2COCHCH2O; and Y is a halogen, H2COCH, or H2COCHCH2O. The porous synthetic membrane has good durability and good protein binding characteristics. Surface charge is provided by covalently binding a charged moiety onto a surface of said layer of crosslinked polymer.
本文描述了一种适用于进行大分子流体分离(如蛋白质过滤)的多孔合成膜。超多孔膜由交联聚合物表面电荷层组成,交联聚合物由纤维素聚合物和交联试剂形成。纤维素聚合物含有大量可交联羟基。交联试剂是一种能与纤维素聚合物的羟基反应并结合的双官能团或多官能团环氧化物,其式为 X(CH2)nY,其中:n 是 1 到 5 的整数;X 是 H2COCH 或 H2COCHCH2O;Y 是卤素、H2COCH 或 H2COCHCH2O。多孔合成膜具有良好的耐久性和良好的蛋白质结合特性。通过将带电分子共价结合到所述交联聚合物层的表面,可提供表面电荷。