▎ 摘　　要

NOVELTY - A composite nanofiltration membrane comprises bacterial cellulose base film and graphene oxide composite compounded on the bacterial cellulose base film surface, where the bacterial cellulose base film is diamine modified bacterial cellulose film, and the graphene oxide composite comprises graphene oxide and attapulgite dispersed between the graphene oxide layers. USE - Composite nanofiltration membrane. ADVANTAGE - The composite nanofiltration membrane has improved flux and higher mechanical strength. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a composite nanofiltration membrane.