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1. (WO2018015912) PROCESS FOR THE PREPARATION OF GRAPHENE DISPERSIONS
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2018/015912 International Application No.: PCT/IB2017/054388
Publication Date: 25.01.2018 International Filing Date: 20.07.2017
IPC:
C08K 3/04 (2006.01) ,C09D 11/52 (2014.01) ,C08L 1/00 (2006.01)
Applicants: FONDAZIONE ISTITUTO ITALIANO DI TECNOLOGIA[IT/IT]; Via Morego 30 16163 Genova, IT
UNIVERSITA' DEGLI STUDI DI GENOVA[IT/IT]; Via Balbi 5 16126 Genova, IT
Inventors: CATALDI, Pietro; IT
BAYER, Ilker; IT
ATHANASIOU, Athanasia; IT
Agent: BIGGI, Cristina; IT
ERRICO, Michela; IT
ROSSETTI, Elena; IT
Priority Data:
10201600007585421.07.2016IT
Title (EN) PROCESS FOR THE PREPARATION OF GRAPHENE DISPERSIONS
(FR) PROCÉDÉ DE PRÉPARATION DE DISPERSIONS DE GRAPHÈNE
Abstract: front page image
(EN) 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
(FR) La présente invention décrit un procédé de préparation d'une dispersion de graphène comprenant les étapes suivantes : i) préparation de flocons ou de poudres d'acétate de cellulose; ii) gonflement des flocons ou des poudres d'acétate de cellulose dans un alcool ayant de 1 à 3 atomes de carbone; iii) addition d'anhydride acétique dans une plage de concentration de 30 à 50 % en pds par rapport au poids total du mélange; iv) addition de nanoplaquettes de graphène pour produire une dispersion de graphène. La dispersion de graphène est utilisée comme encre pour les matériaux composites qui sont utilisés dans le domaine de l'électronique pliable. L'invention concerne également un matériau composite comprenant des nanoplaquettes de graphène uniformément dispersées et son utilisation pour la fabrication de dispositifs électroniques.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)