@Article{BossBASBBKS:2020:SuAlRa,
author = "Boss, Alan F. N. and Braghiroli, Flavia L. and Amaral-Labat,
Gisele and Souza, Ariane Aparecida Teixeira de and Baldan,
Maur{\'{\i}}cio Ribeiro and Bouafif, Hassine and Koubaa, Ahmed
and Silva, Guilherme F. B. Lenz e",
affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Universit{\'e} du
Qu{\'e}bec en Abitibi-T{\'e}miscamingue (UQAT)} and
{Universidade de S{\~a}o Paulo (USP)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Centre Technologique des R{\'e}sidus
Industriels (CTRI)} and {Universit{\'e} du Qu{\'e}bec en
Abitibi-T{\'e}miscamingue (UQAT)} and {Universidade de S{\~a}o
Paulo (USP)}",
title = "Dielectric characterization of white birch–activated biochar
composites: A sustainable alternative to radar-absorbing
materials",
journal = "Journal of Composite Materials",
year = "2020",
volume = "54",
number = "9",
pages = "1233--1244",
month = "apr.",
keywords = "Sustainability, biochar, radar-absorbing material, reflectivity,
microwave-absorbing material.",
abstract = "Sustainability can be defined as the ability of meet presents
needs without compromise the ability of future generations to find
their own needs. In this matter, scientists have been warning
about natural resource scarcity, and now several researchers are
aiming their efforts to develop sustainable technologies. Here, we
focus on finding novel uses to biochar, a carbon rich material
made from biomass that is usually applied on soil amendment. To
expand its applications, biochars were activated using two
different methods: a physical activation using CO2; and a chemical
one using KOH. We investigate here the dielectric properties of
composites made with both activated biochars from white birch,
where composites were made using silicone rubber matrix. It was
also investigated the influence of composites made with biochar in
powder and in flakes. All samples were characterized over the
X-band frequency range. Composites made with powder presented a
linear permittivity over the frequency range, while composites
made with flakes presented oscillations on different frequencies.
These oscillations are related to the composite surface, which
induces reflection effects because of flakes arrangement in the
top surface. Such effects widen opportunities to engineer new
materials to be explored as radar-absorbing materials.",
doi = "10.1177/0021998319877493",
url = "http://dx.doi.org/10.1177/0021998319877493",
issn = "0021-9983",
language = "en",
targetfile = "boss_dielectric.pdf",
urlaccessdate = "28 abr. 2024"
}