公开(公告)号：US10773954B2

公开(公告)日：2020-09-15

申请号：US15313183

申请日：2015-06-16

Applicant: Directa Plus S.P.A.

Inventor： Giulio Cesareo ,  Maria Riccardo Parrini ,  Laura Giorgia Rizzi

IPC: B82Y30/00 ,  B01J19/10 ,  C01B32/19 ,  C01B32/225 ,  C01B32/184 ,  B82Y40/00 ,  C01B32/182

Abstract: Process for producing pristine graphene nanoplatelets, comprising the expansion of flakes of intercalated graphite and the collection thereof in water with formation of a dispersion in the substantial absence of surfactants, followed by an exfoliation and size reduction treatment carried out using ultrasonication of the aqueous dispersion or using high pressure homogenization thereof in a high shear homogenizer. A dispersion of pristine graphene is obtained in the form of nanoplatelets, at least 90% of which have a lateral size (x, y) from 50 to 50,000 nm and a thickness (z) from 0.34 to 50 nm, having a C/O ratio ≥100:1 and a high electrical conductivity.

公开(公告)号：US10435837B2

公开(公告)日：2019-10-08

申请号：US14772764

申请日：2014-02-28

Applicant: DIRECTA PLUS S.P.A.

Inventor： Giulio Cesareo ,  Maria Riccardo Parrini ,  Laura Giorgia Rizzi

IPC: C08K3/04 ,  D06M11/74 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/19 ,  C01B32/194 ,  C09D7/61

Abstract: Concentrated dispersion from 5 to 50% by weight of nanoparticles of graphene in water with a lateral size from 10 to 5000 nm and thickness from 0.34 to 30 nm. The production process comprises the dispersion in water of flakes of expanded graphite and the subsequent treatment with ultrasounds at an energy level of from 100 to 2000 W for a period from 1 to 100 hours.

公开(公告)号：US10457557B2

公开(公告)日：2019-10-29

申请号：US15313205

申请日：2015-06-16

Applicant: Directa Plus S.P.A.

Inventor： Giulio Cesareo ,  Maria Riccardo Parrini ,  Laura Giorgia Rizzi

IPC: C01B32/19 ,  B82Y30/00 ,  B82Y40/00

Abstract: Process for producing graphene nanoplatelets, comprising expanding flakes of intercalated graphite and collection of the same in a dispersing medium with forming of a dispersion that is subjected to exfoliation and size reduction treatment carried out by high pressure homogenization in a high shear homogenizer. A dispersion of graphene is obtained in the form of nanoplatelets, at least 90% of which have a lateral size (x, y) from 50 to 50,000 nm and a thickness (z) from 0.34 to 50 nm.

公开(公告)号：US20210156078A1

公开(公告)日：2021-05-27

申请号：US16977173

申请日：2019-04-17

Applicant: DIRECTA PLUS S.P.A.

Inventor： Laura Giorgia Rizzi ,  Giulio Cesareo ,  Razvan Popescu

IPC: D06M11/74 ,  D06M23/16 ,  C01B32/182

Abstract: Textile article with a pattern comprising graphene, defining a surface with empty portions and full portions, with a percentage of coverage from 10 to 70% of the surface defined by the pattern, so as to forma thermal circuit for optimal management of the heat absorbed and of the breathability of the article, and the process for its preparation.

公开(公告)号：US10913666B2

公开(公告)日：2021-02-09

申请号：US16324831

申请日：2017-08-09

Applicant: Directa Plus S.p.A.

Inventor： Giulio Cesareo ,  Annalisa Pola ,  Laura Giorgia Rizzi

IPC: C02F1/28 ,  B01J20/28 ,  B01J20/20 ,  B01D17/02 ,  C02F1/00 ,  C02F101/32 ,  C02F103/10

Abstract: Process for the treatment of water containing low quantities of hydrocarbons (as dispersed or dissolved or emulsified) by means of expanded graphite having an apparent density from 2 to less than 5 g/l, wherein said hydrocarbons are present in a quantity less than or equal to 1 g/l, a specific surface area from 50 to 100 m2/g and a carbon/oxygen ratio (C:O)≥100. The expanded graphite is mixed vigorously for a short time with the water contaminated by hydrocarbons and easily separated at the end of the treatment.

公开(公告)号：US20170190583A1

公开(公告)日：2017-07-06

申请号：US15313205

申请日：2015-06-16

Applicant: Directa Plus S.P.A.

Inventor： Giulio Cesareo ,  Maria Riccardo Parrini ,  Laura Giorgia Rizzi

IPC: C01B31/02 ,  C01B31/04

CPC classification number: C01B32/19 ,  B82Y30/00 ,  B82Y40/00 ,  C01B2204/04 ,  C01B2204/32 ,  C01P2004/24 ,  C01P2006/80 ,  Y10S977/734 ,  Y10S977/842

Abstract: Process for producing graphene nanoplatelets, comprising expanding flakes of intercalated graphite and collection of the same in a dispersing medium with forming of a dispersion that is subjected to exfoliation and size reduction treatment carried out by high pressure homogenization in a high shear homogenizer. A dispersion of graphene is obtained in the form of nanoplatelets, at least 90% of which have a lateral size (x, y) from 50 to 50,000 nm and a thickness (z) from 0.34 to 50 nm.

公开(公告)号：US20240237641A1

公开(公告)日：2024-07-18

申请号：US18289378

申请日：2022-05-03

Applicant: DIRECTA PLUS S.P.A.

Inventor： Laura Giorgia Rizzi ,  Giulio Cesareo

IPC: A01N25/34 ,  A01N25/24 ,  A01N35/02 ,  A01N35/06 ,  A01N43/16 ,  A01P1/00 ,  D06M11/74 ,  D06M13/175 ,  D06M15/03 ,  D06M15/11 ,  D06M15/13 ,  D06M16/00 ,  D06M101/30

CPC classification number: A01N25/34 ,  A01N25/24 ,  A01N35/02 ,  A01N35/06 ,  A01N43/16 ,  A01P1/00 ,  D06M11/74 ,  D06M13/175 ,  D06M15/03 ,  D06M15/11 ,  D06M15/13 ,  D06M16/00 ,  D06M2101/30

Abstract: Composition for the treatment of textile articles comprising graphene and a binder agent dispersed in an aqueous medium, in which the binder agent is a polysaccharide selected from the group consisting of starch, glycogen, chitosan, pectin, salts of alginic acid or alginates, dextran, chitin, and glycans, and textile article treated with said composition.

公开(公告)号：US12037741B2

公开(公告)日：2024-07-16

申请号：US16977173

申请日：2019-04-17

Applicant: DIRECTA PLUS S.P.A.

Inventor： Laura Giorgia Rizzi ,  Giulio Cesareo ,  Razvan Popescu

IPC: D06M11/74 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/182 ,  D06M23/16

CPC classification number: D06M11/74 ,  C01B32/182 ,  D06M23/16 ,  B82Y30/00 ,  B82Y40/00 ,  C01B2204/22 ,  C01B2204/32

Abstract: Textile article with a pattern comprising graphene, defining a surface with empty portions and full portions, with a percentage of coverage from 10 to 70% of the surface defined by the pattern, so as to form a thermal circuit for optimal management of the heat absorbed and of the breathability of the article, and the process for its preparation.

公开(公告)号：US10920045B2

公开(公告)日：2021-02-16

申请号：US15747146

申请日：2016-07-25

Applicant: DIRECTA PLUS S.P.A.

Inventor： Giulio Cesareo ,  Massimiliano Bianchi ,  Antonino Di Pasquale

IPC: C08K3/04 ,  C08K3/36 ,  B60C1/00 ,  B60C5/00 ,  C08L9/00 ,  C08L9/06 ,  C08L7/00 ,  C08L23/16

Abstract: Elastomeric composition for producing tire components comprising, based upon parts by weight per 100 parts by weight of rubber (phr): (A) 100 phr of a blend of rubber comprising at least 20% by weight of an isoprene polymer; (B) from 0 to 30 phr of silica; (C) from 0 to 50 phr of amorphous carbon black; (D) from 1 to 40 phr of graphene, wherein the graphene consists of graphene nanoplatelets, wherein at least 90% have a lateral size (x, y) from 50 to 50000 nm and a thickness (z) from 0.34 to 50 nm, wherein the lateral size is always greater than the thickness (x, y>z), and wherein the C/O ratio is ≥100:1.

公开(公告)号：US20190185348A1

公开(公告)日：2019-06-20

申请号：US16324831

申请日：2017-08-09

Applicant: Directa Plus S.p.A.

Inventor： Giulio Cesareo ,  Annalisa Pola ,  Laura Giorgia Rizzi

IPC: C02F1/28 ,  B01J20/20 ,  B01J20/28 ,  C02F1/00

CPC classification number: C02F1/283 ,  B01J20/20 ,  B01J20/28011 ,  B01J20/28059 ,  C02F1/001 ,  C02F2101/32 ,  C02F2103/10 ,  C02F2303/18

Abstract: Process for the treatment of water containing low quantities of hydrocarbons (as dispersed or dissolved or emulsified) by means of expanded graphite having an apparent density from 2 to less than 5 g/l, wherein said hydrocarbons are present in a quantity less than or equal to 1 g/l, a specific surface area from 50 to 100 m2/g and a carbon/oxygen ratio (C:O)≥100. The expanded graphite is mixed vigorously for a short time with the water contaminated by hydrocarbons and easily separated at the end of the treatment.