公开(公告)号：US20200377675A1

公开(公告)日：2020-12-03

申请号：US16636628

申请日：2018-07-27

Applicant: University of Houston System

Inventor： Zhifeng Ren ,  Dan Luo ,  Feng Wang

IPC: C08J3/215 ,  C01B32/198

Abstract: A facile and scalable method to prepare graphene-based amphiphilic Janus nanosheets with high efficiency utilizing the formation of hydrogen bonding to immobilize graphene oxide (GO) on the surfaces of starch microspheres. After selective functionalization of the exposed surface using alkylamine, amphiphilic Janus nanosheets (AJN) were obtained by releasing the nanosheets from the starch microspheres.

公开(公告)号：US11891304B2

公开(公告)日：2024-02-06

申请号：US16651152

申请日：2018-09-27

Applicant: University of Houston System

Inventor： Zhifeng Ren ,  Dan Luo ,  Feng Wang

IPC: C01B32/198 ,  B82Y30/00 ,  B82Y40/00

CPC classification number: C01B32/198 ,  B82Y30/00 ,  B82Y40/00

Abstract: A stable water based nanofluid of graphene-based amphiphilic Janus nanosheets, where the nanofluid has a high salt-content while retaining the interfacial activities of the nanosheets. Such a nanofluid of amphiphilic Janus nanosheets may be used for enhanced oil recovery.

公开(公告)号：US11365294B2

公开(公告)日：2022-06-21

申请号：US16636628

申请日：2018-07-27

Applicant: University of Houston System

Inventor： Zhifeng Ren ,  Dan Luo ,  Feng Wang

IPC: C08J3/215 ,  C01B32/198 ,  B82Y40/00

Abstract: A facile and scalable method to prepare graphene-based amphiphilic Janus nanosheets with high efficiency utilizing the formation of hydrogen bonding to immobilize graphene oxide (GO) on the surfaces of starch microspheres. After selective functionalization of the exposed surface using alkylamine, amphiphilic Janus nanosheets (AJN) were obtained by releasing the nanosheets from the starch microspheres.

公开(公告)号：US10934475B2

公开(公告)日：2021-03-02

申请号：US15744924

申请日：2016-07-15

Applicant: University of Houston System

Inventor： Zhifeng Ren ,  Feng Wang ,  Dan Luo

IPC: C09K8/584 ,  B82Y30/00 ,  C09K8/60 ,  B82Y40/00

Abstract: A Janus graphene nanosheet (JGN) surfactant formed from a two-dimensional graphene oxide sheet and functionalized to produce an amphiphilic graphene nanosheet. The JGN may be a component of a nanofluid utilized in nanofluid flooding for oil recovery. The JGN may also be used as solid surfactants to form emulsions for oil recovery.

公开(公告)号：US20200231445A1

公开(公告)日：2020-07-23

申请号：US16651152

申请日：2018-09-27

Applicant: University of Houston System

Inventor： Zhifeng Ren ,  Dan Luo ,  Feng Wang

IPC: C01B32/198

Abstract: A stable water based nanofluid of graphene-based amphiphilic Janus nanosheets, where the nanofluid has a high salt-content while retaining the interfacial activities of the nanosheets. Such a nanofluid of amphiphilic Janus nanosheets may be used for enhanced oil recovery.