Noncovalently functionalized halloysite nanotubes for use in reinforced polymer composites
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2020
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ACS Applied Nano Materials
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The inorganic halloysite nanotube (HNT) is a promising type of
naturally occurring fillers with many important uses in different fields. An HNT
has a relatively low content of hydroxyl groups on its surface, which makes it
relatively hydrophobic, although this is not always sufficient to guarantee good
interfacial adhesion in composite systems. Further surface treatment is required to
improve the compatibility of HNTs with polymer matrixes, maximizing interfacial
interactions. The aim of the present work was to study a noncovalent
functionalization of halloysite with 2,2′-(1,2-ethenediyldi-4,1-phenylene) bisbenzoxazole
(EPB), based on electron transfer, for further use of EPB as a coupling
agent in polymer/HNT compatibility. A set of characterization techniques were
performed to evaluate the chemical and physical properties and evidence the
functionalization. The results revealed the surface modification of halloysite upon
functionalization. Emphasis was for powder wettability by tensiometry based on
Washburn because no studies about halloysite powders using this technique could
be found in the literature. The results demonstrate a reduction in the total surface energy of the system, usually accompanied by a
reduction in the polar component upon HNT modification.
Como referenciar
FRANCISCO, DANAE L.; PAIVA, LUCILENE B.; ALDEIA, WAGNER; LUGAO, ADEMAR B.; MOURA, ESPERIDIANA A.B. Noncovalently functionalized halloysite nanotubes for use in reinforced polymer composites. ACS Applied Nano Materials, v. 3, n. 11, p. 11510-11516, 2020. DOI: 10.1021/acsanm.0c02600. Disponível em: http://repositorio.ipen.br/handle/123456789/31822. Acesso em: 06 Jun 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.