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 
              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 = "22 abr. 2021"