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.
Type:
Grant
Filed:
May 24, 2021
Date of Patent:
February 18, 2025
Assignee:
Directa Plus S.p.A.
Inventors:
Giulio Giuseppe Cesareo, Laura Giorgia Rizzi
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.
Type:
Grant
Filed:
April 17, 2019
Date of Patent:
July 16, 2024
Assignee:
Directa Plus S.p.A.
Inventors:
Laura Giorgia Rizzi, Giulio Cesareo, Razvan Popescu
Abstract: A shoe sole comprising an elastomeric composition comprising: (D) 100 phr of a mixture of rubbers comprising: i. from 40 to 70% by weight of an isoprene polymer; ii. from 20 to 50% by weight of polybutadiene; iii. from 10 to 40% by weight of an SBR having a glass transition temperature (Tg) from ?60 to ?40° C.; (E) from 50 to 100 phr of amorphous carbon black having a surface area greater than 85 m2/g measured with the ASTM D6556 method, and a dibutyl phthalate absorption index (DBPA) greater than 90 measured with the ASTM D2414 method; (F) from 1 to 30 phr of graphene nano-platelets, wherein at least 90% of said graphene nano-platelets has a side dimension (x, y) from 50 to 50000 nm and a thickness (z) of 0.34 to 50 nm, and wherein said graphene nano-platelets have a C/O ratio ?100:1.
Type:
Grant
Filed:
June 20, 2019
Date of Patent:
July 9, 2024
Assignee:
Directa Plus S.p.A.
Inventors:
Giulio Giuseppe Cesareo, Massimiliano Bianchi, Antonino Di Pasquale
Abstract: Method and composition for increasing the electrical and thermal conductivity of a textile article comprising the application of a composition comprising graphene and an inorganic pigment, so as to form a layer that consists of a thermal circuit for optimal management of heat and an electrical circuit for dissipation of the static electricity accumulated on the textile article.
Type:
Grant
Filed:
December 2, 2020
Date of Patent:
June 18, 2024
Assignee:
Directa Plus S.p.A.
Inventors:
Laura Giorgio Rizzi, Giulio Giuseppe Cesareo
Abstract: Golf ball consisting of an inner part comprising at least an elastomeric polymer and a reinforcing agent comprising graphene nano-platelets in which at least 90% of the nano-platelets has a lateral size (x, y) from 50 to 50,000 nm and a thickness (z) from 0.34 to 45 nm, and a C/O ratio ?100:1.
Type:
Grant
Filed:
December 12, 2017
Date of Patent:
August 30, 2022
Assignee:
Directa Plus S.p.A.
Inventors:
Giulio Giuseppe Cesareo, Massimiliano Bianchi, Antonino Di Pasquale
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.
Type:
Grant
Filed:
August 9, 2017
Date of Patent:
February 9, 2021
Assignee:
Directa Plus S.p.A.
Inventors:
Giulio Cesareo, Annalisa Pola, Laura Giorgia Rizzi
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.
Type:
Grant
Filed:
June 16, 2015
Date of Patent:
September 15, 2020
Assignee:
Directa Plus S.p.A.
Inventors:
Giulio Cesareo, Maria Riccardo Parrini, Laura Giorgia Rizzi
Abstract: The reactor is used for producing nano-particles of metal from volatile moieties in flow through mode. The reactor comprises at least a first feeder and a second feeder on one end of the vessel. The first feeder feeds the moiety in the form of an educt fluid into the reactor. This fluid is a mixture of metal moieties and a bearer fluid, entering the reactor in a vaporized state, in which the bearer fluid is used as a carrier gas. The second feeder is used as a radiator means to heat up the educt fluid within the reactor. By providing the heating fluid through the second feeder control over some environmental conditions like ambient temperature within the reactor is achieved and dissociation of the metal moieties under such controlled conditions leads to quantitative production of selected nano-particle morphologies.
Type:
Grant
Filed:
August 29, 2011
Date of Patent:
March 24, 2015
Assignee:
Directa Plus S.p.A.
Inventors:
Robert Mercuri, Michael Kasper, Emilie Bekaert, Peter Axmann