Química

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http://repositorio.ufes.br/handle/10/17500
Programa de Pós-Graduação em Química

Centro: CCE
Telefone: (27) 4009 2909
URL do programa: http://www.quimica.vitoria.ufes.br

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Navegando Química por Autor "Amaral, Heliane Rosa do"

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    Obtenção de celulose e seus derivados a partir da casca do coco de babaçu e sua aplicação como biomaterial
    (Universidade Federal do Espírito Santo, 2019-08-15) Amaral, Heliane Rosa do; Freitas, Jair Carlos Checon de; https://orcid.org/0000000244742474; http://lattes.cnpq.br/3074997830683878; https://orcid.org/0000-0002-6372-6226; http://lattes.cnpq.br/2532103635590392; Silva Filho, Eloi Alves da ; https://orcid.org/0000-0002-9306-7882; http://lattes.cnpq.br/8259708288584235; Bueno, Thiago Eduardo Pedreira; https://orcid.org/0000-0002-8848-8914; http://lattes.cnpq.br/5243363621794078; Dalmaschio, Cleocir Jose; https://orcid.org/0000000237735786; http://lattes.cnpq.br/5209978120430790; Rezende, Camila Alves de
    In this work, babassu coconut shells (epicarp and endocarp) were used to obtain cellulosic products, such as cellulose, cellulose acetate and regenerated cellulose nanofibers. These materials were chemically and structurally characterized by FTIR, solid-state NMR, SEM, TGA and DSC, among other techniques. As this precursor naturally contains a significant amount of silica, a composite containing cellulose fibers and also amorphous silica particles (with rosette-like shape) was also produced. Regenerated cellulose nanofibers were then used together with poly(globalide) for the production of amphiphilic bilayer films, with potential use as cell-free skin regeneration scaffolds. The amphiphilic bilayer films were produced at ambient temperature using two different methodologies (1. Layer deposition and 2. Mechanical blending). All the films showed a homogeneous morphology and a well-defined interface between poly(globalide) and cellulose. A dithiol and a photoinitiator were used for thiol-ene addition to form covalently cross-linked poly(globalide) networks with the regenerated cellulose nanofibers. All the films also showed good swelling in water and in methylene chloride after cross-linking. To illustrate the plethora of potential applications of this material, the amphiphilic bilayer films were successfully used as scaffolds to support keratinocytes attachment and proliferation.