Abstract:
The present invention refers to a polyelectrolyte fluorinated acrylic copolymer having a tuned number of charges in its backbone, said copolymer being useful to produce a release-agent composition. The present invention also refers to a method for obtaining said polyelectrolyte fluorinated acrylic copolymer as well as to a method for producing said release-agent composition. The preferred application of said release-agent composition is in the manufacturing process of vehicle tyres, specifically during the vulcanization of pneumatic rubber vehicle tyres for defining the tyre tread pattern and configuration of the sidewalls thereof.
Abstract:
Process for producing a hydrophobic composite bioelastomer, comprising a cross-linked bioelastomer matrix in which an organic phase is dispersed, comprising the reaction of cross-linking of a hydroxyl-terminated polysiloxane with a silane coupling agent, comprising an acetoxysilane, to obtain a cross-linked polysiloxane with release of acetic acid. The reaction of cross-linking is carried out in the presence of starch to cause at least partial in situ acetylation by the acetic acid released from said starch that is incorporated in the cross-linked bioelastomer matrix.
Abstract:
The sensor (10) comprises a substrate (12) and a polymeric layer (14) deposited on the substrate (12). The polymeric layer (14) includes polyimide having electrically conductive properties when said polymeric layer (14) adsorbs a quantity of ammonia. The polyimide has imide groups capable of reacting with the adsorbed quantity of ammonia to turn into amide groups. Thus, the electric resistance of the polyimide is variable according to the quantity of ammonia gas or vapour adsorbed by the polymeric layer (14). The sensor (10) comprises a pair of electrodes (16) electrically connected to the polymeric region (14) and configured for allowing the detection of the electric resistance value of the polyimide.
Abstract:
Process for the production of a polymer foam with use of hydrogel pearls as porosity generating template, comprising the steps of: - providing a matrix of polymer or prepolymer in viscous state including, as a dispersed phase, hydrogel pearls, where said pearls are dispersed in said matrix so as to generate intercommunicating cells, - causing the solidification of the matrix of polymer or prepolymer to obtain said polymer foam including said hydrogel pearls, characterised in that it comprises the operation of subjecting the thus obtained foam to conditions which cause the dehydration of said hydrogel pearls so as to obtain a reduction of volume of said pearls and - removing the dehydrated pearls by immersion in water of the polymer foam or by exposure of the foam to a flow of pressurized gas or water.
Abstract:
The present invention refers to a reusable sorbent sponge comprising a support structure made of an open pore flexible polyurethane foam and at least one oily substance, said reusable sorbent sponge being advantageously and preferably employed for the in-situ remediation of oil spills. The present invention also refers to a method for producing said reusable sorbent sponge.
Abstract:
Process for the production of a biodegradable plastics material obtained from plant waste materials, characterised in that it comprises the operations of: a) dissolving the said plant waste material in an anhydrous solvent comprising anhydrous trifluoroacetic acid; in order to dissolve a cellulose fraction of the said material, the said waste material being at least partly dehydrated in such a way that its water content is not likely to cause hydrolysis of the said cellulose fraction, and b) removing solvent from the solution containing the said non-hydrolysed cellulose fraction.
Abstract:
Process for the enhancement of the biodegradability of polyolefinic materials The present invention relates to a process for the enhancement of the biodegradability of polyolefinic materials comprising the steps of: providing a polyolefinic material; mixing the polyolefinic material with at least a fatty reagent; heating up the polyolefinic material mixed with the at least a fatty reagent to the melting temperature of the polyolefinic material, in order to obtain a melted material; letting cool the melted material at room temperature for a time sufficient to obtain a solidified product; incubating the solidified product with at least a fungal mycelium selected from fungal strains secreting Unspecific Peroxygenases (UPO), in presence of at least a fungal culture medium.
Abstract:
Cellulose-based composite material comprising an electrically conductive material dispersed in a matrix comprising at least one plant-derived protein and a polymer of aleuritic acid, said composite material being obtainable by a process comprising the steps of dissolving at least one plant-derived protein and aleuritic acid in a dissolving solution to achieve a first mixture, dispersing an electrically conductive material in said first mixture to achieve a conductive ink, distributing said conductive ink on at least one side of a cellulose substrate to achieve a coated cellulose substrate, hot-pressing said coated cellulose substrate to obtain i) impregnation of the cellulose substrate with said conductive ink and ii) polymerization of aleuritic acid.
Abstract:
The present invention refers to a process for the preparation of a graphene dispersion comprising the following steps: i) providing cellulose acetate flakes or powders; ii) swelling the cellulose acetate flakes or powders in an alcohol having from 1 to 3 carbon atoms; iii) adding acetic anhydride in a concentration range from 30 to 50 wt% referred to the total weight of the mixture; iv) adding graphene nanoplatelets to yield a graphene dispersion. The graphene dispersion is used as ink for composite materials that are employed in the field of foldable electronics. The invention relates also to a composite material comprising uniformly dispersed graphene nanoplatelets and its use for manufacturing electronic devices
Abstract:
Composition in the form of a shaped device, for use as a fiducial marker in tissues in the animal body, in radiotherapy and/or radiosurgery, characterized in that it comprises: - a core consisting of a colloidal dispersion of metal nanoparticles and/or oxides or metal salts having X-ray-contrast properties, where said nanoparticles are stabilized with surfactants, polymers or capping agents in a liquid vehicle, and - a polymeric casing that encapsulates the core, said device having a minimum size of not less than 500 microns and a maximum size not greater than 3000 microns.