Data/hora: 22/06/2024 04:01:26

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 06/06/2016
Data da última atualização: | 11/07/2017
Autoria: | MATTOS, B. D.; ROJAS, O. J.; MAGALHAES, W. L. E.
Afiliação: | Bruno D. Mattos, Doutorando da UFPR; Orlando J. Rojas, NCSU / Aalto University; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF.
Título: | Biogenic SiO2 in colloidal dispersions via ball milling and ultrasonication.
Ano de publicação: | 2016
Fonte/Imprenta: | Powder Technology, v. 301, p. 58-64, Nov. 2016.
DOI: | http://dx.doi.org/10.1016/j.powtec.2016.05.052
Idioma: | Inglês
Conteúdo: | Biogenic silica from Equisetum arvense was dispersed in aqueous media by using ball milling, high-energy planetary ball milling and ultrasonication. Zeta potential (?), dynamic light scattering, and transmission electron microscopy revealed the electrostatic charge andmorphological characteristics of the particles,which formed stable colloidal dispersions. Ball milling and ultrasonication yielded particles of 10 nm in size that clustered into larger structures. Extended milling time was effective in reducing the particle size by ball milling and ultrasonication but not by high-energy planetary ball milling. The colloidal stability of the dispersions was maximized under alkaline conditions (? N ?30 mV and smallest cluster size of 100?200 nm).
Palavras-Chave: | Biogenic nanosilica; Carga na superfície; Colloidal dispersions; Dispersão coloidal; Nanosílica biogênica; Nanotecnologia; Surface charge.
Thesagro: | Cavalinha.
Thesaurus Nal: | Equisetum arvense; Nanotechnology.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (55065-1) - UPC - AP - DD -  -  -  - DIS