Hydrophile Polysiloxane als waschbeständige Textilhilfsmittel
type: CreativeWork
description: This work focuses on the kinetics of the application and washing process of two different functionalized silicones on cotton fabric. The first, a polyquaternary polysiloxane - blockcopolymer, interacts by hydrogen bonding to the hydroxyl-groups of the cotton fibre. The second, a reactive functionalized polyquaternary polysiloxane-block-copolymer consists of uretdione functions, which can react with either the hydroxyl groups of the cellulose or with OH-groups of the silicone to form a silicone network. In this work the kinetic aspects of the finishing and washing process are decribed. The first examinations to analyse the application process were done using a fluorescent ammonium functionalized silicone softener. This modification allows measurements of the silicone concentration in the bath during the application by photometric detection. The fibre cross section could be analysed by fluorescence microscopy during the application process. The bath analysis shows that the application process follows a sorption isotherm described by Langmuir. The examinations by fluorescence microscopy show a change in the cross section of the fibre towards an oval shape after treatment and a diffusion of the silicone polymer into the lumen. The examination of the fiber surface during the application process with a non fluorescent modified silicon polymer was accomplished by XPS. The changes in the concentration of silicone in the bath were measured by photometric detection after reaction of the ammonium groups of the silicone with bromophenol blue. The kinetics can be described by the square-root-t-relation. The resulting rate constants do not differ significantly for different bath temperatures. The examinations by XPS and IR-spectroscopy of the washing process showed a diffusion of the silicone molecules from the core to the surface of the fibre, where they are removed by the surfactants of the washing bath. XPS results show that after one washing cycle the silicone concentration o…
abstract: This work focuses on the kinetics of the application and washing process of two different functionalized silicones on cotton fabric. The first, a polyquaternary polysiloxane - blockcopolymer, interacts by hydrogen bonding to the hydroxyl-groups of the cotton fibre. The second, a reactive functionalized polyquaternary polysiloxane-block-copolymer consists of uretdione functions, which can react with either the hydroxyl groups of the cellulose or with OH-groups of the silicone to form a silicone network. In this work the kinetic aspects of the finishing and washing process are decribed. The first examinations to analyse the application process were done using a fluorescent ammonium functionalized silicone softener. This modification allows measurements of the silicone concentration in the bath during the application by photometric detection. The fibre cross section could be analysed by fluorescence microscopy during the application process. The bath analysis shows that the application process follows a sorption isotherm described by Langmuir. The examinations by fluorescence microscopy show a change in the cross section of the fibre towards an oval shape after treatment and a diffusion of the silicone polymer into the lumen. The examination of the fiber surface during the application process with a non fluorescent modified silicon polymer was accomplished by XPS. The changes in the concentration of silicone in the bath were measured by photometric detection after reaction of the ammonium groups of the silicone with bromophenol blue. The kinetics can be described by the square-root-t-relation. The resulting rate constants do not differ significantly for different bath temperatures. The examinations by XPS and IR-spectroscopy of the washing process showed a diffusion of the silicone molecules from the core to the surface of the fibre, where they are removed by the surfactants of the washing bath. XPS results show that after one washing cycle the silicone concentration o…
author: Thoss, Henner
language: ger
keywords: info:eu-repo/classification/ddc/540, Silicone, Reaktionskinetik, Baumwollfaser, Röntgen-Photoelektronenspektroskopie, Chemie, Ficksche Gesetze, CIELAB System, Polysiloxane, FT-IR Spektroskopie, Waschkinetik, Aufziehkinetik, Fick Law, FT-IR Spectroscopy, washing kinetics, application kinetics
date published: 2007
date modified: 2026-07-30T19:43:10Z
provider: RWTH Aachen University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Publikationsserver der RWTH Aachen University