Chemically cross-linked aerogels based on cellulose nanocrystals and polysilsesquioxane
Maria do Carmo Gonçalves, Daniela de Morais Zanata, Liliane Cristina Battirola
ARTIGO
Inglês
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...
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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. 29Si 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.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
136786/2015-4
COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2010/17804-7; 2016/02414-5
Fechado
Chemically cross-linked aerogels based on cellulose nanocrystals and polysilsesquioxane
Maria do Carmo Gonçalves, Daniela de Morais Zanata, Liliane Cristina Battirola
Chemically cross-linked aerogels based on cellulose nanocrystals and polysilsesquioxane
Maria do Carmo Gonçalves, Daniela de Morais Zanata, Liliane Cristina Battirola
Fontes
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Cellulose Vol. 12 (Oct., 2018) |