Hydrocarbylsulfinylethyl cellulose represented by the formula (1):
wherein. X may be the same or different and represents hydrogen atom or hydrocarbylsulfinylethyl group represented by the formula (II):
wherein, R may be the same or different and represents an alkyl group having 1 to 6 carbon atoms or a phenyl group, with the average substitution degree with the hydrocarbylsulfinylethyl group of the formula (II) per glucose unit being at least 0.05 is provided together with a process for preparing the same and a sulfur dioxide gas permeation membrane comprising said cellulose derivative. This membrane is excellent in sulfur dioxide gas permselectivity.
由式(1)代表的烃基亚磺酰基
乙基纤维素:
其中X可以相同或不同,代表氢原子或由式(II)代表的烃基亚磺酰基乙基:
其中,R 可以相同或不同,代表具有 1 至 6 个碳原子的烷基或苯基,每个
葡萄糖单位与式 (II) 中的烃基亚磺酰基的平均取代度至少为 0.05。这种膜具有优异的
二氧化硫气体渗透性。