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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Chemically cross-linked aerogels based on cellulose nanocrystals and polysilsesquioxane

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Autor(es):
Zanata, Daniela de Morais [1] ; Battirola, Liliane Cristina [1] ; Goncalves, Maria do Carmo [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Campinas UNICAMP, Inst Chem, POB 6154, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Cellulose; v. 25, n. 12, p. 7225-7238, DEC 2018.
Citações Web of Science: 2
Resumo

In this work, we report one-pot synthesis of free standing and porous hybrid cross-linked aerogels based on cellulose nanocrystals (CNCs) and polysilsesquioxane (PSS). The synthesis of the aerogel was carried out in two steps. The first was CNC surface modification, using a 3-isocyanatopropyltriethoxysilane, and the second, a sol-gel process, resulting in the formation of a PSS network which cross-linked with the nanoparticles. Si-29 solid state NMR analysis revealed that this network was mostly made up of linear and three-dimensional PSS domains. Aerogels showed shape stability and high porosity (>89%). The presence of macro and mesopores was confirmed by SEM and BET analyses, respectively, and the presence of the PSS network domains in the pore walls was characterized by TEM. In addition, these CNC/PSS aerogels were omniphilic, absorbing approximately the same amount of both water and toluene. These characteristics make these aerogels interesting material to be used as absorbents for a wide variety of spills.Graphical abstract {[}GRAPHICS] . (AU)

Processo FAPESP: 16/02414-5 - Biomateriais absorvíveis e tópicos para a liberação localizada de óxido nítrico
Beneficiário:Marcelo Ganzarolli de Oliveira
Modalidade de apoio: Auxílio à Pesquisa - Temático
Processo FAPESP: 10/17804-7 - Compósitos poliméricos
Beneficiário:Maria Isabel Felisberti
Modalidade de apoio: Auxílio à Pesquisa - Temático