公开(公告)号：US20210309822A1

公开(公告)日：2021-10-07

申请号：US17245418

申请日：2021-04-30

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

Inventor： ELI BULGER ,  MAHATI CHINTAPALLI ,  GABRIEL IFTIME ,  QUENTIN VAN OVERMEERE ,  JESSICA LOUIS BAKER RIVEST ,  RAVI NEELAKANTAN ,  STEPHEN MECKLER

IPC: C08J9/00 ,  C08J9/28 ,  C08J3/24

Abstract: A method of producing a polymer aerogel includes dissolving precursors into a solvent, wherein the precursors include monomers, crosslinkers, a controlling agent and an initiator to form a precursor solution, wherein at least one of the monomers or at least one of the crosslinkers has a refractive index of 1.5 or lower, polymerizing the precursor solution to form a gel polymer, and removing the solvent from the gel polymer to produce the polymer aerogel. A method of producing a polymer aerogel include dissolving precursors into a solvent, wherein the precursors include monomers, crosslinkers, a controlling agent and an initiator to form a precursor solution, polymerizing the precursor solution to form a gel polymer, removing the solvent from the gel polymer to produce the polymer aerogel, and reducing a refractive index of one of either the gel polymer or the polymer aerogel.

公开(公告)号：US20210206939A1

公开(公告)日：2021-07-08

申请号：US16732627

申请日：2020-01-02

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

Inventor： STEPHEN MECKLER ,  MAHATI CHINTAPALLI ,  GABRIEL IFTIME ,  ELI BULGER

IPC: C08J9/28

Abstract: A porous, polymer aerogel having a pore size distribution with a full-width at half maximum between 0.1 and 10 nanometers, a visible transmittance greater than 30%/3 mm, haze less than 70%/3 mm, and a color rendering index of at least 25. A method of forming a porous, polymer aerogel, includes producing a miscible formulation of at least one of monomers, oligomers, crosslinkers and prepolymers, polymerizing the miscible formulation to form a multiphasic gel, wherein phases are continuous and the multiphasic gel has at least one depolymerizable domain and at least one non-depolymerizable domain, and the at least one depolymerizable domain is chemically bonded to the at least one non-depolymerizable domain, and removing the depolymerizable domain or domains from the multiphasic gel to produce a porous aerogel with a color rendering index of at least 25. A method of forming a porous, polymer aerogel, including producing a miscible formulation of at least one monomer, oligomer or crosslinker, and a prepolymer having at least one reactive functional group, polymerizing the miscible formulation to form a multiphasic gel, wherein the prepolymer having at least one reactive functional group is chemically bonded to a polymer that results from the polymerization of the at least one monomer or oligomer, and phases are continuous and the multiphasic gel has at least one depolymerizable domain bonded to at least one non-depolymerizable domain, and placing the multiphasic gel in a depolymerization solution having a depolymerization solvent to chemically degrade the depolymerizable domain into smaller oligomers and monomers, removing the depolymerization solvent to produce a porous aerogel with a color rendering index of at least 25.

公开(公告)号：US20210040256A1

公开(公告)日：2021-02-11

申请号：US17069611

申请日：2020-10-13

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED ,  XEROX CORPORATION

Inventor： MAHATI CHINTAPALLI ,  BARKEV KEOSHKERIAN ,  ALEC HO ,  GABRIEL IFTIME ,  QUENTIN VAN OVERMEERE ,  ELI BULGER

IPC: C08F293/00 ,  B01J13/00 ,  C08J3/24

Abstract: A dried polymer aerogel has a Brunauer-Emmett Teller (BET) surface area over 100 m2/g, porosity of greater than 10%, visible transparency greater than 20%, color rendering index of over 20%, and average pore size of less than 100 nm.

公开(公告)号：US20220143695A1

公开(公告)日：2022-05-12

申请号：US17094506

申请日：2020-11-10

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

Inventor： MAHATI CHINTAPALLI ,  ANNE PLOCHOWIETZ ,  ASHISH V. PATTEKAR ,  JENGPING LU ,  WARREN JACKSON

IPC: B22F3/105 ,  B22F1/00 ,  B33Y70/00

Abstract: A system has a surface, a feedstock deposition head arranged to deposit a sinterable feedstock having a binder on the surface, a patterning system arranged adjacent the surface to change the feedstock surface energy according to a pattern to form selective surface energy patterns on the feedstock, a sintering-selectivity material deposition head arranged adjacent the feedstock deposition head to deposit sintering-selectivity fluid, the sintering-selectivity fluid selected to conform to the selective surface energy patterns, and a sintering chamber to sinter the feedstock after deposition of the anti-sintering agent. A method of forming three-dimensional objects includes depositing a, sinterable feedstock onto a surface, forming a surface energy pattern in the sinterable feedstock by pattern-wise debinding of the binder from the sinterable feedstock, depositing a sintering-selectivity fluid mixed with a solvent selected to cause the sintering-selectivity material to conform to the surface energy pattern, and sintering the feedstock.

公开(公告)号：US20220127200A1

公开(公告)日：2022-04-28

申请号：US17077062

申请日：2020-10-22

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

Inventor： MAHATI CHINTAPALLI ,  ANNE PLOCHOWIETZ ,  ASHISH V. PATTEKAR ,  JENGPING LU ,  WARREN JACKSON

IPC: C04B40/00 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  C04B41/00 ,  B33Y30/00

Abstract: A method of forming three-dimensional objects includes depositing a sinterable, dense feedstock comprising a sinterable material and binder onto a surface, depositing a sintering selectivity material according to a pattern, removing the binder, sintering the sinterable, dense feedstock to form a three-dimensional sintered object, and finishing the sintered object. A sintering-selectivity material includes a solvent, and a sintering-selectivity material in the solvent, the sintering-selectivity material having the characteristic of being able to penetrate a dense feedstock. A system has a surface, a feedstock deposition head arranged to deposit a sinterable, dense feedstock on the surface, a sintering-selectivity deposition head arranged to deposit a sintering-selectivity material on at least one of the surface and the feedstock, a debinding mechanism arranged to debind the feedstock from the binder, and a sintering chamber to sinter the feedstock after debinding.

公开(公告)号：US20210310957A1

公开(公告)日：2021-10-07

申请号：US17347910

申请日：2021-06-15

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED ,  XEROX CORPORATION

Inventor： GABRIEL IFTIME ,  JESSICA LOUIS BAKER RIVEST ,  GEORGE A. GIBSON ,  ERIC COCKER ,  MAHATI CHINTAPALLI ,  QUENTIN VAN OVERMEERE

IPC: G01N21/78 ,  B82Y30/00 ,  G01N31/22

Abstract: A method of forming a sensor includes providing a substrate, forming a polymer aerogel layer on the substrate, and infusing the polymer aerogel layer with sensing molecules.

公开(公告)号：US20230228687A1

公开(公告)日：2023-07-20

申请号：US18115364

申请日：2023-02-28

Applicant: Palo Alto Research Center Incorporated

Inventor： GABRIEL IFTIME ,  MAHATI CHINTAPALLI ,  ELI BULGER ,  WARREN JACKSON ,  SEAN EMERSON DORIS ,  JESSICA LOUIS BAKER RIVEST ,  ERIC COCKER ,  ANTONIO WILLIAMS ,  CRYSTAL PHAM

IPC: G01N21/78 ,  G01N33/52

CPC classification number: G01N21/78 ,  G01N33/525

Abstract: A method of forming a colorimetric sensor includes depositing a first material onto a substrate, providing porous sensing particles, wherein the sensing particles comprise sensing species dispersed into a porous host structure, and embedding the porous sensing particles onto a surface of the deposited first material, the first material attaching the sensing particles to the substrate with at least a portion of the sensing particles is exposed to an ambient environment.

公开(公告)号：US20220259399A1

公开(公告)日：2022-08-18

申请号：US17735321

申请日：2022-05-03

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

Inventor： STEPHEN MECKLER ,  MAHATI CHINTAPALLI ,  GABRIEL IFTIME ,  ELI BULGER

IPC: C08J9/28

Abstract: A method of forming a porous, polymer aerogel, includes producing a miscible formulation of at least one of monomers, oligomers, crosslinkers and prepolymers, polymerizing the miscible formulation to form a multiphasic gel, wherein phases are continuous and the multiphasic gel has at least one depolymerizable domain and at least one non-depolymerizable domain, and the at least one depolymerizable domain is chemically bonded to the at least one non-depolymerizable domain, and removing the depolymerizable domain or domains from the multiphasic gel to produce a porous aerogel with a color rendering index of at least 25. A method of forming a porous, polymer aerogel, including producing a miscible formulation of at least one monomer, oligomer or crosslinker, and a prepolymer having at least one reactive functional group, polymerizing the miscible formulation to form a multiphasic gel, wherein the prepolymer having at least one reactive functional group is chemically bonded to a polymer that results from the polymerization of the at least one monomer or oligomer, and phases are continuous and the multiphasic gel has at least one depolymerizable domain bonded to at least one non-depolymerizable domain, and placing the multiphasic gel in a depolymerization solution having a depolymerization solvent to chemically degrade the depolymerizable domain into smaller oligomers and monomers, removing the depolymerization solvent to produce a porous aerogel with a color rendering index of at least 25.

公开(公告)号：US20220220267A1

公开(公告)日：2022-07-14

申请号：US17147217

申请日：2021-01-12

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

Inventor： JUNHUA WEI ,  GABRIEL IFTIME ,  MICHAEL BENEDICT ,  MAHATI CHINTAPALLI

IPC: C08J5/24 ,  C08K3/34 ,  C08K3/36 ,  C08K3/04

Abstract: A method of manufacturing includes producing a powder resin comprising a polymer precursor and a thermal initiator, packing a fiber structure with the powder resin, resulting in a resin-packed structure, and heating the resin-packed structure to a curing temperature high enough to melt and cure the resin-packed structure to form a final structure.

公开(公告)号：US20200031977A1

公开(公告)日：2020-01-30

申请号：US16046692

申请日：2018-07-26

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED ,  XEROX CORPORATION

Inventor： MAHATI CHINTAPALLI ,  BARKEV KEOSHKERIAN ,  ALEC HO ,  GABRIEL IFTIME ,  QUENTIN VAN OVERMEERE ,  ELI BULGER

IPC: C08F293/00 ,  C08J3/24 ,  B01J13/00

Abstract: A method to produce a polymer gel includes dissolving precursors in a solvent to form a precursor solution, the precursors including polymer precursors, a stable free radical, one or more initiating radicals, and one or more stable free radical control agents, and heating the precursor solution to a temperature of polymerization to produce a cross-linked gel. A dried polymer aerogel has a Brunauer-Emmett Teller (BET) surface area over 100 m2/g, porosity of greater than 10%, visible transparency greater than 20%, color rendering index of over 20%, and average pore size of less than 100 nm.