Naslov
Adsorption isotherms of ionic particles on cotton fibre-the influence of surface charge on adsorption

Autori
Grancarić, Ana Marija ; Soljačić, Ivo ; Pušić, Tanja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
AATCC International Conference and Exhibition-Book of Papers / Keesee, Susan H. - Atlanta (GA) : American Association of Textile Chemists and Colorists, 1997

Skup
1997 AATCC International Conference and Exhibition

Mjesto i datum
Atlanta (GA), Sjedinjene Američke Države, 28.09.1997. - 01.10.1997

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
cotton; mercerization of cotton; Ionic Adsorption on cotton Adsorption Isotherms

Sažetak
An adsorption study of anionic and cationic surfactant, and Benzopurpurin 4B on cotton yarns was performed to determine the influence of electrically charged cotton surface on adsorption of ionic particles and to presume the adsorption mechanism. Fundamentally, many wet textile processes start at an interface between an agueous bath and polymer molecules of fibres. Surfactant molecules are of unsymmetrical structure and are accumulated in the surface layer of solution, lowering the surface tension. A part of its molecules has affinity for the solvent and a part has little or no affinity. In adsorption Benzopurpurin 4B is of coplanar structure and highly substantive direct dye. Because of negatively charged cotton surface, cationic surfactant exhibit greater tendency for adsorption on cotton surface than anionic one. In the case of anionic particles, such there are anionic dyes and surfactants, ion-ion repulsion occurs and they exhibit lower adsorption. For dyeing system, this repulsion is overcome through reduction of surface potential on the fibre, by increasing ionic strength of dyebath, and by use of dyes of large molecular area when non-ionic interaction occurs. In the present paper, an analysis of experimental adsorption isotherms of the cationic sodium dodecylsulfate, anionic dodecyltrimethyl ammonium chloride and Benzopurpurin 4B (C.I.23500) has been carried out, especially with respect to the effect of cotton surface charge on adsorption mechanism. Experiments have been carried out using unmercerized and mercerized cotton yarns (62.5x3 tex), in the bath range from pH4 to pH9, at constant temperature (T = 400C) and for different span of time. The amount of adsorbed surfactants on cotton yarns was indirectly determined by modified two-phase titration method and amount of adsorbed dye using spectrophotometric method.

Izvorni jezik
Engleski

Znanstvena područja
Tekstilna tehnologija

POVEZANOST RADA