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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.
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Patent Agency Ranking
公开(公告)号：US20210155845A1
公开(公告)日：2021-05-27
申请号：US17102155
申请日：2020-11-23
Applicant: University of Houston System
Inventor： Zhifeng Ren , Dan Luo
Abstract: A composition composed of highly reactive metal particles that are ball milled, bead milled or blended and dispersed in a solvent with/without polymer for significantly reducing the viscosity of heavy oil for extracting viscous heavy oil, such that the composition reacts with water and oil to produce heat, H2 gas, and hydroxide to lower the oil viscosity and facilitate extraction from an underground formation or transport of heavy oil, such as in a pipe from one place to another place.
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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
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.
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4.发明申请公开(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.
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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.
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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.
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