Phosphonium Modified Nanocellulose Membranes with High Permeate Flux and Antibacterial Property for Oily Wastewater Separation

Nanocellulose membranes could efficiently separate oily wastewater because of their super-hydrophilic and underwater super-oleophobic property nano-porous structure. However, the practical application storage nanocellulose is limited by low water permeation flux easy corrosion bacteria, respectively. Herein, with high permeate antibacterial were fabricated grafting tetrakis(hydroxymethyl) phosphonium chloride (THPC) onto surface TEMPO-oxidized tunicate cellulose nanofibers (TCNFs) via esterification reaction. The introduction THPC groups tetrahedral structure on TCNFs significantly improved pore size interlayer space membranes, resulting in an increase flux. These THPC@TCNF super-oleophobic, which effectively various oil/water nano-emulsions. Moreover, possessed excellent durability, mechanical stability cycling performance. Due to presence positively charged groups, exhibited against B. subtilis, a typical Gram-positive bacterium presenting wastewater. This work provides simple method endow membrane property.