Single step exfoliation and covalent functionalization of MoS2: development of novel elastomeric materials

• Grant number: 16/20493-0
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Start date: May 01, 2017
• End date: June 30, 2021
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Edson Roberto Leite
• Grantee: Rodrigo de Souza Penha Fiel
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID

Abstract

In this project the development of a simple methodology will be proposed in order to exfoliate and functionalize, in a single-step, a colloidal dispersion of molybdenum disulfide (MoS2) in a polybutadiene (PB) solution through sonication process. The advantage of such process dwells in colloidal stabilization of MoS2 in a non-polar solvent due to chemical bonds between À-electrons of carbon atoms of polybutadiene and sulfur atoms located on the edge of MoS2 slabs. After that, it will be analyzed and discussed the properties of this nanocomposite under two prospects: the first one is MoS2 acting like reinforcement in PB vulcanized elastomer improving its thermal and mechanical resistance and solvent attack resistance. The second one is to obtain a molecular nanocomposite, that is, the PB acting like a building block in a layer-by-layer assembling, having a high mechanical resistance (strenght-to-weight ratio) and a high toughness compared to metals and conventional ceramics. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FIEL, RODRIGO; BARCELOS, INGRID D.; LEITE, EDSON ROBERTO. Organo-functionalized MoS2 as a nanofiller to enhance and control the swelling behavior of polybutadiene rubber nanocomposites. COMPOSITES COMMUNICATIONS, v. 30, FEB 2022. (13/07296-2, 16/20493-0)

FIEL, RODRIGO; BARCELOS, INGRID D.; GONCALVES, RICARDO H.; SOARES, MARIO R. S.; ROCHA, GABRIEL; SILVA, CAIO M. P.; MASTELARO, VALMOR R.; LEITE, EDSON R.. One-pot exfoliation and surface functionalization of MoS2: A potential nanofiller to overcome the brittleness of polystyrene (PS). Polymer, v. 233, OCT 26 2021. (16/20493-0)