Data/hora: 22/06/2024 11:07:15

Biblioteca(s): | Embrapa Instrumentação.
Data corrente: | 22/12/1999
Data da última atualização: | 22/12/1999
Autoria: | MELLO, S. V.; MATTOSO, L. H. C.; OLIVEIRA JUNIOR, O. N.; FARIA, R. M.
Afiliação: | USP-IQSC; EMBRAPA-CNPDIA; USP-IFSC.
Título: | Processibility of poly(o-ethoxyaniline) via the Langmuir-Blodgett technique.
Ano de publicação: | 1995
Fonte/Imprenta: | In: INTERNATIONAL CONFERENCE ON ORGANIZED MOLECULAR FILMS, 7., Sept. 1995, Numana, Ancona, Italia. Abstract book... [S.l.: s.n.], 1995.
Páginas: | p.33.
Idioma: | Inglês
Notas: | Ref.P-1.97.
Conteúdo: | Poly(o-ethoxyaniline) (POEA), a polyaniline derivative, has been chemically synthesized for the fabrication of Langmuir and Langmuir-Blodgett (LB) films. Good quality films were only obtained when acidic subphases were employed, owing to the doping process the polymer molecules suffer. Monolayers spread on aqueous solutions containing different concentrations of e.g. trifluoroacetic (TFA) and hydrochloric acid possess high collapse pressures and excellent stability. Different types (Y or Z) of LB films were produced depending on the conditions of film preparation and on the type of substrate. The highest quality films are Z-type LB films deposited on BK7 glass, especially if the polymer is pre-doped in TFA. The as-deposited LB films are already in the doped state, as confirmed by UV-visible absorption measurements.
Palavras-Chave: | Films; Langmuir-Blodgett technique; Polyaniline.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (5502-1) - UPC - PL - -- - PROCI-95.00081 -  - 1995.00081 - DIS