METHOD FOR INCORPORATING CARBON NANOMATERIALS INTO AN FBE POLYMER MATRIX IN SOLID PHASE, PRODUCT AND USE

• Main Authors: GOMIDE DE CASTRO, Vinícius, SALOMÃO RIBEIRO CURY, Camila, GOULART SILVA, Glaura, DA SILVA MEDEIROS, Felipe
• Format: Patent
• Language: English; French; Portuguese
• Published: 03.02.2022
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; DYES; FILLING PASTES; INKS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MILLING GRAIN; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PREPARATORY TREATMENT OF GRAIN FOR MILLING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

Efficient method for mixing, dispersing and integrating reduced graphene oxide (RGO) or carbon nanomaterials or nanostructured materials into a fusion-bonded epoxy (FBE) matrix. The polymer material comprises a mixture of the solid epoxy in particulate form with a curing agent, catalyst, pigments and inorganic additives. This enables particulate nanometric additives to be added to the FBE, using the FBE in solid state. The mixtures have little or no sign of RGO aggregation following application of the composite as metal coating. The FBE + RGO mixture can be applied to metal surfaces to protect against abrasive and corrosive processes. Resistance to abrasion is improved by up to 11%, material resistance to accelerated tests (such as immersion in a bath of hot water) is improved, and adherence is increased significantly, by approximately 100%, following the hot bath immersion test. L'invention concerne un procédé efficace de mélange, de dispersion et d'intégration d'oxyde de graphène réduit (RGO) ou de nanomatériaux de carbone ou de matériaux nanostructurés dans une matrice époxy du type « fusion-bonded epoxy » (FBE). Le matériau polymère est constitué par un mélange d'époxy solide particulaire avec un agent de durcissement, un catalyseur, des pigments et des additifs inorganiques. Il permet d'intégrer des additifs nanométriques particulaires dans le FBE, en utilisant le FBE à l'état solide. Les mélanges présentent un signal d'agrégation de RGO faible ou nul après application du composite comme revêtement sur des métaux. Le mélange de FBE + RGO peut être appliqué sur des surfaces métalliques en vue d'une protection contre les processus abrasifs et la corrosion. On a observé des augmentations pouvant atteindre 11 % de la résistance à l'abrasion, une amélioration de la résistance du matériau aux essais accélérés, tels que l'immersion dans un bain d'eau chaude, et une augmentation sensible de l'adhérence, d'environ 100 % après le test d'immersion dans un bain chaud. Processo eficiente de mistura, dispersão e integração do óxido de grafeno reduzido (RGO) ou de nanomateriais de carbono ou materiais nanoestruturados à matriz epóxi do tipo "fusion-bonded epoxy" (FBE). O material polimérico é constituído por uma mistura do epóxi sólida particulada com um agente de cura, catalisador, pigmentos e aditivos inorgânicos. Permite integrar aditivos nanométricos particulados no FBE, utilizando FBE no estado sólido. As misturas apresentam baixo ou nenhum sinal de agregação do RGO após aplicação do compósito como revestimento em metais. A mistura de FBE + RGO pode ser aplicada em superfícies metálicas para proteção contra processos abrasivos e corrosão. Verificou-se aumentos de até 11% na resistência à abrasão, melhoria na resistência do material a ensaios acelerados, como a imersão em banho de água quente, e expressivo aumento da aderência, de aproximadamente 100% após teste de imersão em banho quente.