Influence of corona discharge and chitosan surface treatment on dyeing properties of wool

Abstract

In this work, the effects of single and combined corona discharge (CD) and biopolymer chitosan treatment (CS) on the sorption properties and dyeability of woolen fabric were studied. Physical and chemical changes on the fiber surface were assessed by using different methods. It has been confirmed that wettability and dyeability of wool were improved after single and combined treatments. The changes in elemental composition of wool fiber surface were followed by means of X-ray photoelectron spectroscopy. The relationship between chemical changes and both wettability and dyeability after CS is discussed. On chitosan treated samples, the color intensity increased uniformly with increasing chitosan concentration. The samples treated with combined treatment (corona/chitosan) had the highest color intensity, due to synergistic effect of the treatments.

Protein Fibre Surface Modification

“…Chitosan is frequently applied to protein-based fibres, as it provides additional sites for acid dye adsorption (Ristić et al 2010). Incorporating an enzyme in the alkaline peroxide treatment bath has been reported to enhance wool wettability and the effectiveness of subsequently applied chitosan biopolymer.…”

“…However, if the enzyme concentration in the peroxide bath is too high, the efficiency of the subsequent chitosan application decreases, as does the shrink resistance (Jovanĉić et al 2001). Chitosan is also better deposited on the wool surface after plasma treatment (Ristić et al 2010). Durable polymer coatings in the form of sol-gels may be deposited on fibre surfaces.…”

“…This can be accomplished by the removal of surface lipids (oxygen plasma) or by the deposition of hydrophilic monomers, such as the plasma-assisted deposition of acrylic acid (Kutlu et al 2010). Aside from dye properties and processing, the wool dyeing rate is primarily determined by fibre morphology and by the state of adsorbed water in the fibre (Ristić et al 2010). These properties may be modified by a variety of surface treatments.…”

“…Corona discharge has been reported to incorporate oxygen atoms into the fibre and enhances wettability, which increases the acid-dye intensity of printed fabrics (Ryu et al 1991). Combining plasma treatments with chitosan results in increases in colour intensity and dyeability over those observed with either treatment alone (Ristić et al 2010). …”

Investigación sobre la mejora de la humectabilidad de films poliméricos de polietileno de baja densidad (LDPE) mediante plasma por descarga corona. Optimización de laminados con espumas de polietileno mediante procesos de laminación con adhesivos Hot-Melt para aplicaciones técnicas en el sector de automoción

“…(St'ahel, Bursikova et al 2006) Por otra parte, la aplicación de la tecnología del plasma en la industria textil, fue expuesta en 1956 por Paul Kassenbek del Instituto Textil de Francia, haciendo actuar la "descarga corona" sobre la lana y el mohair. (Ristic, Jovancic et al 2010) Al mismo tiempo, fue tomando protagonismo en Europa y Estados Unidos a partir de los años 80. Desde entonces y hasta la actualidad, muchos aspectos de esta tecnología han sido estudiados y se han publicado numerosos estudios con resultados de experimentos en reactores a vacío, diseñados fundamentalmente para el tratamiento de materiales inorgánicos en el campo de la microelectrónica.…”