title: Supercritical carbon dioxide assisted silicon based finishing of cellulosic fabric: a novel approach.
abstract: Usage of supercritical carbon dioxide as a medium for finishing cotton fabrics with modified dimethylsiloxane polymers terminated with silanol groups was investigated, different cross-linkers namely 3-isocyanatepropyltriethoxysilane (IPES) and tetraethylorthosilicate (TEOS) were used for covalently bonding between silicon and cellulose. The presence and the amount of PDMS compounds on the treated fabrics were characterized by FT-IR. Qualitative and quantitative information on the distribution of the silicon molecules across the fibre cross section was provided by SEM/EDX analysis and Confocal Raman microscopy (CRM) respectively. The results confirm that all fibres treated with PDMS and IPES have larger silicon amounts than those treated with TEOS. SC-CO2 medium provides good coating of cotton surface with a 3D network of DMS compound and cross linker, and leads to forming highest DMS concentration in a layer between 1 and 2μ under the surface of cotton fabrics.
authors.affiliation: Textile Research Division, National Research Centre, Dokki, Giza, Egypt. alo.mohamed12@hotmail.com
authors.forename: Amina L
authors.initials: AL
authors.lastname: Mohamed
authors.forename: Meriem
authors.initials: M
authors.lastname: Er-Rafik
authors.forename: Martin
authors.initials: M
authors.lastname: Moller
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D033081:Shear Strength; D012821:Silanes / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*; D013718:Tensile Strength; D013784:Textiles
chemical_list: D004129:Dimethylpolysiloxanes; D012821:Silanes; D002245:Carbon Dioxide; C040733:tetraethoxysilane; C013830:baysilon; D002482:Cellulose; D012825:Silicon
keywords: Confocal Raman; Cotton fabric; DMS compound; Kawabata Evaluation System; Silicon oil