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：US20240035690A1

公开(公告)日：2024-02-01

申请号：US18268751

申请日：2021-12-27

Applicant: DIRECTA PLUS S.P.A.

Inventor： Laura Giorgia Rizzi ,  Giulio Giuseppe Cesareo

IPC: F24F8/108 ,  B01D39/14 ,  D06M11/74

CPC classification number: F24F8/108 ,  B01D39/14 ,  D06M11/74 ,  B01D2239/0258 ,  B01D2239/0407 ,  B01D2239/0442 ,  B01D2239/0464

Abstract: Filter element for air conditioning unit comprising a textile substrate selected from woven fabric and nonwoven fabric, and a composition comprising graphene, in which said graphene is in the form of nano-platelets and is present in an amount from 2 to 20 g of graphene per square meter of textile substrate and is dispersed in a binding agent and applied uniformly on all said textile substrate by means of impregnation.

公开(公告)号：US20230243089A1

公开(公告)日：2023-08-03

申请号：US17927770

申请日：2021-05-24

Applicant: DIRECTA PLUS S.P.A.

Inventor： Giulio Giuseppe Cesareo ,  Laura Giorgia Rizzi

IPC: D06M11/74 ,  B01D39/08 ,  B01D39/16 ,  B01D39/20 ,  D06B3/18 ,  D06M16/00

CPC classification number: D06M11/74 ,  B01D39/083 ,  B01D39/1623 ,  B01D39/2058 ,  D06B3/18 ,  D06M16/00 ,  B01D2239/0442 ,  B01D2239/0241 ,  B01D2239/0258 ,  B01D2239/0464 ,  B01D2239/0618 ,  B01D2239/0627 ,  B01D2239/10 ,  D06M2101/20

Abstract: Method of treating a textile article by impregnation with a water dispersion of graphene nano-platelets in an impregnation bath comprising also a polymeric binder and an anti-migration and wetting agent. Graphene is fixed in the textile article to improve its thermal and electrical conductivity, as well as its filtering power and germ-blocking properties.

公开(公告)号：US20230225430A1

公开(公告)日：2023-07-20

申请号：US17927768

申请日：2021-05-24

Applicant: DIRECTA PLUS S.P.A.

Inventor： Giulio Giuseppe Cesareo ,  Laura Giorgia Rizzi

IPC: A41D13/11 ,  B82Y30/00 ,  B01D71/02

CPC classification number: A41D13/11 ,  B82Y30/00 ,  B01D71/0211 ,  B01D2239/0442 ,  B01D2239/0241

Abstract: Textile article comprising a textile substrate to which graphene is applied in an amount from 0.5 to 20 g of graphene per square meter of textile substrate, wherein said graphene is dispersed in a polymeric binder and forms a thermal circuit heatable by exposure to electromagnetic radiation. There is also described a filter comprising said textile article, for example a face mask for personal health protection.

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：US20250032660A1

公开(公告)日：2025-01-30

申请号：US18716544

申请日：2022-12-15

Applicant: DIRECTA PLUS S.P.A.

Inventor： Laura Giorgia Rizzi ,  Giulio Giuseppe Cesareo

IPC: A61L15/18 ,  A61L15/44

Abstract: Use of a textile article containing graphene to produce a bandage to be applied on wounds, wherein said graphene comprises graphene nano-platelets in which at least 90% has a lateral dimension (x, y) from 500 to 50000 nm and a thickness (z) from 0.34 to 50 nm, and wherein said textile article comprises from 0.01 to 20 g of said graphene per square meter.

公开(公告)号：US20230295870A1

公开(公告)日：2023-09-21

申请号：US18018612

申请日：2021-07-21

Applicant: DIRECTA PLUS S.P.A.

Inventor： Giulio Giuseppe Cesareo ,  Laura Giorgia Rizzi ,  Alessandra Bambini

IPC: D06N3/14 ,  D06N3/00

CPC classification number: D06N3/145 ,  D06N3/0011 ,  D06N3/0036 ,  D06N3/0063 ,  D06N3/0097 ,  D06N2201/02 ,  D06N2203/068 ,  D06N2205/12 ,  D06N2211/10 ,  D06N2209/041 ,  D06N2211/28

Abstract: Method for making a thermally and electrically conductive coating on natural or synthetic leather comprising the deposition of several layers based on aliphatic polyurethanes, with an intermediate layer, having a thickness from 10 to 50 μm, comprising graphene nano-platelets, wherein at least 90% has a lateral dimension (x, y) from 50 to 50000 μm and a thickness (z) from 0.34 to 50 nm, and wherein the C/O ratio is ≥100:1.

公开(公告)号：US20230030305A1

公开(公告)日：2023-02-02

申请号：US17874747

申请日：2022-07-27

Applicant: Nant Holdings IP, LLC ,  Directa Plus, S.p.A.

Inventor： Patrick Soon-Shiong ,  Giulio Giuseppe Cesareo ,  Laura Giorgia Rizzi

IPC: C01B32/192 ,  H01M10/36 ,  H01M10/0525

Abstract: Devices and methods are presented that comprise graphene platelets with controlled dimension and high carbon to oxygen ratio, and that further include a heteroatom or heteroionic species, an alkylammonium polysulfide, or both, preferably non-covalently bound to the graphene platelets. Such compositions have significantly improved conductive properties as opposed to unmodified graphene platelets and can be easily produced at mass quantities and low cost.

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：US12225953B2

公开(公告)日：2025-02-18

申请号：US17927770

申请日：2021-05-24

Applicant: DIRECTA PLUS S.P.A.

Inventor： Giulio Giuseppe Cesareo ,  Laura Giorgia Rizzi

IPC: B01D71/02 ,  A41D13/11 ,  B01D39/08 ,  B01D39/16 ,  B01D39/20 ,  B82Y30/00 ,  D06B3/18 ,  D06M11/74 ,  D06M16/00 ,  D06M101/20 ,  D06M101/06 ,  D06M101/32 ,  D06M101/38

Abstract: Method of treating a textile article by impregnation with a water dispersion of graphene nano-platelets in an impregnation bath comprising also a polymeric binder and an anti-migration and wetting agent. Graphene is fixed in the textile article to improve its thermal and electrical conductivity, as well as its filtering power and germ-blocking properties.