公开(公告)号：US20240110008A1

公开(公告)日：2024-04-04

申请号：US17946007

申请日：2022-09-15

Applicant: XEROX CORPORATION

Inventor： Robert Claridge ,  Valerie M. Farrugia ,  David Lawton

IPC: C08G65/48 ,  C08J5/22 ,  H01M8/103 ,  H01M8/1067

CPC classification number: C08G65/48 ,  C08J5/2256 ,  H01M8/103 ,  H01M8/1067 ,  C08J2371/08 ,  H01M2008/1095

Abstract: A structured organic film (SOF) is disclosed including a plurality of segments, a plurality of linkers, and a plurality of ionic capping segments, where at least one or more ionic capping segments may include imidazolium. Implementations of the structured organic film (SOF) include where a concentration of ionic capping segments in the SOF is from about 0.1 to about 5.0 molar equivalents of ionic capping segments as compared to a concentration of nonionic segments in the SOF. A thickness of the SOF is from about 100 nm to about 500 μm. At least one of the plurality of ionic capping segments may include n-hydroxyethyl-1,2,4,5-tetramethylimidazolium (NETMImBr). At least one of the plurality of ionic capping segments may include n-hydroxypropyl-1,2,4,5-tetramethylimidazolium (NPTMImBr). An ion-exchange membrane may include the structured organic film (SOF).

公开(公告)号：US20240010850A1

公开(公告)日：2024-01-11

申请号：US17811003

申请日：2022-07-06

Applicant: Xerox Corporation

Inventor： Yujie Zhu ,  Yulin Wang ,  Kurt I. Halfyard ,  Edward G. Zwartz ,  Robert Claridge ,  Benjamin Knapik ,  David Lawton

IPC: C09D5/24 ,  C25B11/081 ,  C25B11/054 ,  C09D11/033 ,  C09D11/037

CPC classification number: C09D5/24 ,  C25B11/081 ,  C25B11/054 ,  C09D11/033 ,  C09D11/037 ,  B82Y30/00

Abstract: A gas diffusion electrode and a method for fabricating the same is disclosed. The gas diffusion electrode can be deployed in a membrane electrode assembly for various applications. In an example, the method to fabricate the gas diffusion electrode includes preparing an ink comprising carbon supported surface functionalized silver nanoparticles and depositing the ink on an electrically conductive surface.

公开(公告)号：US20210070988A1

公开(公告)日：2021-03-11

申请号：US16946625

申请日：2020-06-30

Applicant: Xerox Corporation

Inventor： Robert Claridge ,  Cristina Resetco ,  Shivanthi Easwari Sriskandha ,  Valerie M. Farrugia ,  Edward G. Zwartz

IPC: C08L75/04 ,  B29C64/153 ,  C08K3/36

Abstract: Melt emulsification may be employed to form elastomeric particulates in a narrow size range when nanoparticles and a sulfonate surfactant are included as emulsion stabilizers. Such processes may comprise combining a polyurethane polymer, a sulfonate surfactant, and nanoparticles with a carrier fluid at a heating temperature at or above a melting point or softening temperature of the polyurethane polymer, applying sufficient shear to disperse the polyurethane polymer as liquefied droplets in the presence of the nanoparticles in the carrier fluid at the heating temperature, cooling the carrier fluid at least until elastomeric particulates in a solidified state form, and separating the elastomeric particulates from the carrier fluid. The polyurethane polymer defines a core and an outer surface of the elastomeric particulates, and the nanoparticles are associated with the outer surface. The elastomeric particulates may have a span of about 0.9 or less.

公开(公告)号：US11932735B2

公开(公告)日：2024-03-19

申请号：US17346737

申请日：2021-06-14

Applicant: Xerox Corporation

Inventor： Valerie M. Farrugia ,  Robert Claridge ,  Hojjat Seyed Jamali

IPC: C08J3/20 ,  C08F14/22 ,  C08J3/205 ,  C08K3/04 ,  C09D11/037 ,  C09D11/101 ,  C09D11/106

CPC classification number: C08J3/2056 ,  C08F14/22 ,  C08K3/042 ,  C09D11/037 ,  C09D11/101 ,  C09D11/106 ,  C08K2201/005 ,  C08K2201/011

Abstract: High spherical particles for use in piezoelectric applications may be produced mixing a mixture comprising a graphene oxide-polyvinylidene fluoride (GO-PVDF) composite, a carrier fluid that is immiscible with the PVDF, and optionally an emulsion stabilizer at a temperature equal to or greater than a melting point or softening temperature of the PVDF to disperse the GO-PVDF composite in the carrier fluid, wherein the GO-PVDF composite has a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less; cooling the mixture to below the melting point or softening temperature of the PVDF to form GO-PVDF particles; and separating the GO-PVDF particles from the carrier fluid, wherein the GO-PVDF particles comprise the graphene oxide dispersed in the PVDF, and wherein the GO-PVDF particles have a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less.

公开(公告)号：US20220396674A1

公开(公告)日：2022-12-15

申请号：US17346737

申请日：2021-06-14

Applicant: Xerox Corporation

Inventor： Valerie M. Farrugia ,  Robert Claridge ,  Hojjat Seyed Jamali

IPC: C08J3/205 ,  C08F14/22 ,  C08K3/04 ,  C09D11/106 ,  C09D11/037 ,  C09D11/101

Abstract: High spherical particles for use in piezoelectric applications may be produced mixing a mixture comprising a graphene oxide-polyvinylidene fluoride (GO-PVDF) composite, a carrier fluid that is immiscible with the PVDF, and optionally an emulsion stabilizer at a temperature equal to or greater than a melting point or softening temperature of the PVDF to disperse the GO-PVDF composite in the carrier fluid, wherein the GO-PVDF composite has a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less; cooling the mixture to below the melting point or softening temperature of the PVDF to form GO-PVDF particles; and separating the GO-PVDF particles from the carrier fluid, wherein the GO-PVDF particles comprise the graphene oxide dispersed in the PVDF, and wherein the GO-PVDF particles have a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less.

公开(公告)号：US20220389145A1

公开(公告)日：2022-12-08

申请号：US17321997

申请日：2021-05-17

Applicant: Xerox Corporation

Inventor： Valerie M. Farrugia ,  Shivanthi Easwari Sriskandha ,  Robert Claridge

IPC: C08F292/00 ,  C08L77/06

Abstract: Highly spherical particles may comprise a thermoplastic polymer grafted to a carbon nanomaterial (CNM-g-polymer), wherein the particles have an aerated density of about 0.5 g/cm3 (preferably about 0.55 g/cm3) to about 0.8 g/cm3. Said CNM-g-polymer particles may be useful in a variety of applications including selective laser sintering additive manufacturing methods.

公开(公告)号：US20240279465A1

公开(公告)日：2024-08-22

申请号：US18637112

申请日：2024-04-16

Applicant: Xerox Corporation

Inventor： Valerie M. Farrugia ,  Cristina Resetco ,  Michael S. Hawkins ,  Shivanthi Easwari Sriskandha ,  Robert Claridge ,  Carolyn Patricia Moorlag

IPC: C08L77/06 ,  C08L23/12 ,  C08L67/03 ,  C08L75/08 ,  C08L83/04

CPC classification number: C08L77/06 ,  C08L23/12 ,  C08L67/03 ,  C08L75/08 ,  C08L83/04 ,  C08L2205/14 ,  C08L2207/02 ,  C08L2207/04

Abstract: Thermoplastic polymer particles can be produced that comprise a thermoplastic polymer and an emulsion stabilizer (e.g., nanoparticles and/or surfactant) associated with an outer surface of the particles. The nanoparticles may be embedded in the outer surface of the particles. Melt emulsification can be used to produce said particles. For example, a method may include: mixing a mixture comprising a thermoplastic polymer, an carrier fluid that is immiscible with the thermoplastic polymer, and the emulsion stabilizer at a temperature greater than a melting point or softening temperature of the thermoplastic polymer and at a shear rate sufficiently high to disperse the thermoplastic polymer in the carrier fluid; cooling the mixture to below the melting point or softening temperature of the thermoplastic polymer to form the thermoplastic polymer particles; and separating the thermoplastic polymer particles from the carrier fluid.

公开(公告)号：US20240102186A1

公开(公告)日：2024-03-28

申请号：US17934565

申请日：2022-09-22

Applicant: Xerox Corporation

Inventor： Yujie Zhu ,  Yulin Wang ,  Robert Claridge ,  Edward G. Zwartz ,  Kurt I. Halfyard ,  David Lawton

IPC: C25B11/032 ,  C25B1/23 ,  C25B11/065 ,  C25B11/089

CPC classification number: C25B11/032 ,  C25B1/23 ,  C25B11/065 ,  C25B11/089

Abstract: A composition, a gas diffusion electrode, and a method for fabricating the same is disclosed. In an example, the composition includes carbon supported carboxyl surface functionalized silver nanoparticles. The gas diffusion electrode can be fabricated with the carbon supported carboxyl surface functionalized silver nanoparticles and deployed in a membrane electrode assembly for various applications.

公开(公告)号：US11731349B2

公开(公告)日：2023-08-22

申请号：US17071255

申请日：2020-10-15

Applicant: Xerox Corporation

Inventor： Robert Claridge ,  Cristina Resetco ,  Richard Philip Nelson Veregin

IPC: B33Y70/10 ,  B29C64/153 ,  B33Y10/00 ,  B33Y80/00 ,  B29C64/314 ,  B29B9/12 ,  B29K75/00 ,  B29K101/12 ,  B29K105/00

CPC classification number: B29C64/153 ,  B29B9/12 ,  B29C64/314 ,  B33Y10/00 ,  B33Y80/00 ,  B29K2075/02 ,  B29K2101/12 ,  B29K2105/251

Abstract: Additive manufacturing processes featuring consolidation of thermoplastic particulates may form printed objects in a range of shapes. Nanoparticles disposed upon the outer surface of the thermoplastic particulates may improve flow performance of the thermoplastic particulates during additive manufacturing, but may lead to excessive porosity following consolidation. Excessive porosity may be detrimental for performance applications requiring high mechanical strength. A carboxylic acid-based sintering aid, particularly a metal carboxylate, may decrease porosity of consolidated parts following sintering without substantially increasing blocking in a powder bed. Particulate compositions suitable for additive manufacturing may comprise: a plurality of thermoplastic particulates comprising a carboxylic acid-based sintering aid admixed with a thermoplastic polymer, and a plurality of nanoparticles disposed upon an outer surface of the thermoplastic particulates.

公开(公告)号：US20230051250A1

公开(公告)日：2023-02-16

申请号：US17388861

申请日：2021-07-29

Applicant: Xerox Corporation

Inventor： Robert Claridge ,  Valerie M. Farrugia

IPC: C08K3/34 ,  B33Y10/00 ,  B33Y40/10 ,  B33Y70/00 ,  B29C64/153 ,  B29C64/314

Abstract: Methods for producing highly spherical particles that comprise: mixing a mixture comprising: (a) nanoclay-filled-polymer composite comprising a nanoclay dispersed in a thermoplastic polymer, (b) a carrier fluid that is immiscible with the thermoplastic polymer of the nanoclay-filled-polymer composite, optionally (c) a thermoplastic polymer not filled with a nanoclay, and optionally (d) an emulsion stabilizer at a temperature at or greater than a melting point or softening temperature of the thermoplastic polymer of the nanoclay-filled-polymer and the thermoplastic polymer, when included, to disperse the nanoclay-filled-polymer composite in the carrier fluid; cooling the mixture to below the melting point or softening temperature to form nanoclay-filled-polymer particles; and separating the nanoclay-filled-polymer particles from the carrier fluid.