公开(公告)号：US20220008867A1

公开(公告)日：2022-01-13

申请号：US17250871

申请日：2019-09-18

Applicant: VALORBEC, S.E.C.

Inventor： Saifur RAHAMAN ,  Tiantian CHEN ,  Md. Shahidul ISLAM ,  Wen MA

IPC: B01D61/58 ,  B01D61/36 ,  B01D71/02 ,  B01D69/02 ,  B01D61/00 ,  B01D67/00 ,  C02F9/00 ,  B01D61/14

Abstract: Membranes for membrane distillation (MD) and forward osmosis (FO) are provided with methods of manufacture and use thereof. The MD membrane comprises a microporous mat of electrospun nanofibers made of a nanocomposite comprising reduced graphene oxide dispersed in a hydrophobic polymer with their surface grafted with a silane coupling agent or with hydrophobic nanoparticles. The FO membrane comprises a microporous support layer and a rejection layer formed on one side of the support layer, wherein the support layer is a microporous mat of electrospun nanofibers made of a nanocomposite of hydrophilic nanoparticles dispersed in a hydrophilic polymer, and the rejection layer is made of nanocomposite of hydrophilic nanoparticles dispersed in a crosslinked meta-aramid of formula (I). There is also provided a process for treating a high-salinity and/or high-strength feed, such as fracking wastewater, comprising microfiltration or ultrafiltration, followed by forward osmosis, and then membrane distillation.