The property of liquid crystal is very important factor for improving blood compatibility of polymer/liquid crystal composite membranes. In this work, five kinds of liquid crystal compounds,[N 4 (methyoxybenzyli dene) 4′ heptylaniline](MBHA), 4 pentyl 4′ nitrile biphenyl(PNP), cholesteryl oleyl carbonate(COC), cholesteryl trithylene glycol carbonate(CTGC), cholesteryl tetrathylene glycol carbonate(CTeGC) were selected as additive to prepare composite membranes for researching the effect of differen...