Adsorption of polyallylamine to lignocellulosic fibres: effect of adsorption conditions on localisation of adsorbed polyelectrolyte and mechanical pro- July 12, 2008 Abstract Cationic polyallylamine (PAH), was adsorbed onto lignocellulosic fibres, and a fluorescent label on the polyelectrolyte enabled its location to be shown by confocal fluorescence microscopy. The adsorption time and ionic strength were varied to study their effect on the localisation of the adsorbed PAH. The microscopy showed that a long adsorption time, 24 h, and a high ionic strength, 101 M NaCl + 5 103 M NaHCO3 or higher, resulted in the adsorption of polyallylamine...http://www.springerlink.com/content/g02r6v0695028n42/ Commentary on the alleged irregularities in APT spectra of imidazolium-based ionic liquids- July 10, 2008 Commentary on the alleged irregularities in APT spectra of imidazolium-based ionic liquids Content Type Journal ArticleCategory NoteDOI 10.1007s10570-008-9236-2Authors Gerald Ebner, University of Natural Resources and Applied Life Sciences Department of Chemistry Vienna (BOKU) Muthgasse 18 1190 Vienna AustriaAndreas Hofinger, University of Natural Resources and Applied Life Sciences Department of Chemistry Vienna (BOKU) Muthgasse 18 1190 Vienna AustriaLothar Brecker, University of Vienna...http://www.springerlink.com/content/c0vv5p2527841536/ Iron gall ink-induced corrosion of cellulose: aging, degradation and stabilization. Part 1: model paper studies- July 10, 2008 Abstract Cellulose in historic paper documents is often damaged by the writing media used, especially iron gall ink or copper pigments. Degradation induced by iron gall ink is suggested to be a synergistic process comprising both hydrolytic and oxidative reactions. These processes were studied on very low sample amounts according to the CCOA and FDAM method, i.e. by fluorescence labeling of carbonyl and carboxyl groups in combination with GPC-MALLS, respectively. This study...http://www.springerlink.com/content/u83723188k758636/ Iron gall ink-induced corrosion of cellulose: aging, degradation and stabilization. Part 2: application on historic sample material- July 9, 2008 Abstract Degradation of cellulose in historic paper by iron gall ink is a synergistic process of both, acid hydrolysis caused by acidic ink ingredients and oxidation catalyzed by free iron andor copper ions. The interplay of both reactions was studied according to the CCOA method on historic paper samples. Only minute amounts (few mg) of the samples were required to obtain profiles of naturally present and oxidatively introduced carbonyl groups, which was done by group-selective...http://www.springerlink.com/content/8k785121630q272x/ CI Reactive Black 5 dye as a visible crosslinker to improve physical properties of lyocell fabrics- July 5, 2008 Abstract Bi-functional reactive dyes have been used for reducing the fibrillation of lyocell fibres. The sole influence of CI Reactive Black 5 dye on the fibrillation tendency of lyocell single jersey knitted fabrics was investigated by dyeing with different concentrations (35 gL for medium shade and 70 gL for dark shade), dyeing without dyestuff and by decolouration process after each dyeing. The fibrillation tendency of lyocell fibres was accessed by means of fibre wet.http://www.springerlink.com/content/k5j251p1864wrxp0/ |