The zwitterionic PAN-based membranes can run for a long time and be reused without significant decrease of separation performance.
改性超滤膜能够长期运行，重复利用后分离性质没有显著的降低。
2
Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed.
通过醛中 间体官能化，还可获得相应的阳离子或两性离子型纤维素酯衍生物。
3
With the aid of HPLC and silver nitrate titration, the structure of zwitterionic surfactant obtained through the reaction of secondary amide and fatty imidazoline has been analysed.