Pdmaema can be cross - linked by quaternization to develop a positively charged dense network structure . according this mechanism , pdmaema / psf positively charged nanofiltration membrane was developed by interfacial polymerization using psf plate macrofiltration membrane as support layer , pre - polymer of pdmaema water solution as coating solution , p - xylylene dichloride / heptane as cross - linking agent 根據(jù)這一機(jī)理,以psf平板微孔膜為基膜, pdmaema預(yù)聚物水溶液為涂層液,以對(duì)二氯芐正庚烷溶液為交聯(lián)劑,采用界面聚合法制備了pdmaema psf荷正電復(fù)合納濾膜。