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Titolo:
The effect of quaternary ammonium base adsorbates on the molecular and morphological structure of microcrystalline cellulose
Autore:
Kotelnikova, NE; Panarin, EF; Shchukarev, AV; Serimaa, R; Paakkari, T; Jokela, K; Shilov, SV; Kudina, NP; Wegener, G; Windeisen, E; Kochetkova, IS;
Indirizzi:
Russian Acad Sci, Inst Macromol Cpds, St Petersburg 199004, Russia RussianAcad Sci St Petersburg Russia 199004 t Petersburg 199004, Russia Joint Stock Co Mechanobr Analyt, St Petersburg 199026, Russia Joint Stock Co Mechanobr Analyt St Petersburg Russia 199026 9026, Russia Univ Helsinki, Dept Phys, SF-00014 Helsinki, Finland Univ Helsinki Helsinki Finland SF-00014 Phys, SF-00014 Helsinki, Finland Univ Munich, Wood Res Inst, D-80797 Munich, Germany Univ Munich Munich Germany D-80797 ood Res Inst, D-80797 Munich, Germany
Titolo Testata:
CARBOHYDRATE POLYMERS
fascicolo: 3, volume: 38, anno: 1999,
pagine: 239 - 246
SICI:
0144-8617(199903)38:3<239:TEOQAB>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
AQUEOUS-SOLUTIONS; ADSORPTION;
Keywords:
quaternary ammonium; microcrystalline cellulose; biologically active compounds;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Kotelnikova, NE RussianRussiaSci, Inst Macromol Cpds, Bolshoy Pr 31, St Petersburg 199004, Russian Acad Sci Bolshoy Pr 31 St Petersburg Russia 199004
Citazione:
N.E. Kotelnikova et al., "The effect of quaternary ammonium base adsorbates on the molecular and morphological structure of microcrystalline cellulose", CARBOHY POL, 38(3), 1999, pp. 239-246

Abstract

In order to obtain multicomponent polymer systems exhibiting biological activity, microcrystalline cellulose was used as a matrix for biologically active compounds, such as dimethylbenzylalkylammonium chloride, poly-N-vinylpyrrolidone, copolymer of N-vinylpyrrolidone and crotonic acid, and polymer complex of dimethylbenzylalkylammonium chloride with copolymer of N-vinylpyrrolidone and crotonic acid. Adsorption interaction of microcrystalline cellulose with these compounds was studied under various conditions. Adsorption isotherms of compounds of polymer nature are of similar character and aredescribed by the Freundlich equation. The isotherms of the low molecular weight compound dimethylbenzylalkylammonium are described by the Langmuir equation. Characteristics of the resulting compounds were obtained using X-ray photoelectron and infrared Fourier spectroscopy, wide-angle X-ray diffractometry and scanning electron microscopy. Chemical interaction between microcrystalline cellulose and dimethylbenzylalkylammonium chloride takes place. This interaction leads to a new labile morphological cellulose structure accessible to penetration, which is confirmed at a morphological level by scanning electron microscopy. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 11:26:50