Busca avançada
Ano de início
Entree
Conteúdo relacionado

Polymer-encapsulation of anisotropic inorganic particles by raft-mediated emulsion polymerization

Processo: 10/50383-5
Linha de fomento:Auxílio à Pesquisa - Regular
Vigência: 01 de janeiro de 2011 - 31 de março de 2014
Área do conhecimento:Engenharias - Engenharia Química - Tecnologia Química
Convênio/Acordo: IUPAC
Pesquisador responsável:Amilton Martins dos Santos
Beneficiário:Amilton Martins dos Santos
Pesq. responsável no exterior: Elodie Bourgeat
Instituição no exterior: Université de Lyon, França
Pesq. responsável no exterior: Ana Timmons
Instituição no exterior: Universidade de Aveiro (UA), Portugal
Instituição-sede: Escola de Engenharia de Lorena (EEL). Universidade de São Paulo (USP). Lorena , SP, Brasil
Assunto(s):Coloides  Nanocompósitos  Polimerização  Emulsões (formas farmacêuticas)  Propriedades ópticas 

Resumo

The incorporation of inorganic particles into polymers is a crucial issue in material science. To preserve and control the unique physical properties of inorganic particles, it is essential to maintain their nanoscale integrity and achieve uniform dispersions. This issue is particularly challenging for anisotropic nano-objects. Whilst a profusion of solvent-borne synthetic strategies involving controlled-radical polymerization are now available to coat the surface of inorganics with polymer brushes, less attention has been dedicated to waterborne systems. Polymer-encapsulated inorganic particles can find applications in various fields including coatings and adhesives. However, current encapsulation techniques through emulsion polymerization suffer from several limitations that restrict the range of inorganic materials that can be efficiently encapsulated. To circumvent these limitations, we propose to develop a generic synthetic method involving emulsion polymerization and the reversible addition-fragmentation chain-transfer (RAFT) technique to produce hybrid latex particles composed of an inorganic core surrounded by a polymer shell. Amphipathic macro-RAFT agents carrying suitable anchor groups for adsorption or grafting to the inorganic surface and a thiocarbonylthio functionality able to control radical polymerization of styrene and (meth)acrylic monomers will be synthesized for this purpose. These polymer precursors should ensure sufficient colloidal stability of the inorganic particles before polymerization and allow subsequent growth of a polymer shell without secondary nucleation. Different types of inorganic materials will be investigated including anisotropic clay platelets and silica-coated luminescent Gd203:Eu3+ nanotubes. The former should provide enhanced mechanical properties while the later is intended to introduce optical functions. The three partners have been carefully selected for their complementary skills. The French and Brazilian teams have been engaged in several joint research programs since 2001 and will provide expertise in RAFT polymerization and synthesis of composite latexes through emulsion polymerization. The Portuguese partner has skills in encapsulation techniques and (...) (AU)

Matéria(s) publicada(s) na Agência FAPESP sobre o auxílio:
Matéria(s) publicada(s) em Outras Mídias (0 total):
Mais itensMenos itens
VEICULO: TITULO (DATA)
VEICULO: TITULO (DATA)

Publicações científicas
(Referências obtidas automaticamente do Web of Science e do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores)
CHAPARRO, THAISSA C.; SILVA, RODRIGO D.; DUGAS, PIERRE-YVES; D'AGOSTO, FRANCK; LANSALOT, MURIEL; MARTINS DOS SANTOS, AMILTON; BOURGEAT-LAMI, ELODIE. Laponite (R)-based colloidal nanocomposites prepared by RAFT-mediated surfactant-free emulsion polymerization: the role of non-ionic and anionic macroRAFT polymers in stability and morphology control. Polymer Chemistry, v. 12, n. 1, p. 69-81, JAN 7 2021. Citações Web of Science: 2.
SILVA, RODRIGO DUARTE; CHAPARRO, THAISSA DE CAMARGO; MONTEIRO, IGOR STEFANICHEN; DUGAS, PIERRE-YVES; D'AGOSTO, FRANCK; LANSALOT, MURIEL; DOS SANTOS, ARNILTON MARTINS; `BOURGEAT-LAMI, ELODIE. Tailoring the Morphology of Polymer/Montrnorillonite Hybrid Latexes by Surfactant-Free Emulsion Polymerization Mediated by Arnphipathic MacroRAFT Agents. MACROMOLECULES, v. 52, n. 13, p. 4979-4988, JUL 9 2019. Citações Web of Science: 2.
SILVA, RODRIGO DUARTE; MONTEIRO, IGOR STEFANICHEN; CHAPARRO, THAISSA DE CAMARGO; HARDT, RAISSA SILVA; GIUDICI, REINALDO; BARROS-TIMMONS, A.; BOURGEAT-LAMI, ELODIE; DOS SANTOS, AMILTON MARTINS. Investigation of the Adsorption of Amphipathic macroRAFT Agents onto Montmorillonite Clay. Langmuir, v. 33, n. 38, p. 9598-9608, SEP 26 2017. Citações Web of Science: 6.

Por favor, reporte erros na lista de publicações científicas escrevendo para: cdi@fapesp.br.