2008, Vol.20, No.1

Textile Coloration and Finishing KCI Impact Factor : 0.0

pISSN : 1229-0033 / eISSN : 2234-036X
https://journal.kci.go.kr/ksdf

The study has attempted to introduce a new coating technique for leather other than the conventional standardized method of spray, padding and roll coating. The study has focused on finding condition for separating water and organic layer in marble bath and surface effects according to kind of raw hide. It was found that dyestuff-free was to be used in water layer and the input amount of initial insoluble pigment to be added in marble bath should be adjusted following the change of surface area of the marble bath in order to get efficient marble effect while preventing coagulation of water and organic layers. Eventually, amorphous high value-added leather could be obtained treated in process other than the conventional standardized method. Even raw hides of low grades(C~E grades) could be processed into amorphous marble effect that could conceal or shield surface scratches by the colorant, which eventually eliminated necessity of using excessive amount of chemicals in the coating process leading to achieving high quality marble leather of natural look

We presented the modified decal-transfer lithography (DTL) and light stamping lithography (LSL) as new powerful methods to generate patterns of poly(dimethylsiloxane) (PDMS) on the substrate. The microstructures of PDMS fabricated by covalent binding between PDMS and substrate had played as barrier to locally control wettability. The transfer mechanism of PDMS is cohesive mechanical failure (CMF) in DTL method. In the LSL method, the features of patterned PDMS are physically torn and transferred onto a substrate via UV-induced surface reaction that results in bonding between PDMS and substrate. Additionally we have exploited to generate the patterning of rhodamine B and quantum dots (QDs), which was accomplished by hydrophobic interaction between dyes and PDMS micropatterns. The topological analysis of micropatterning of PDMS were performed by atomic force microscopy (AFM), and the patterning of rhodamine B and quantum dots was clearly shown by optical and fluorescence microscope. Furthermore, it could be applied to surface guided flow patterns in microfluidic device because of control of surface wettability. The advantages of these methods are simple process, rapid transfer of PDMS, modulation of surface wettability, and control of various pattern size and shape. It may be applied to the fabrication of chemical sensor, display units, and microfluidic devices.

In this study the effects of swelling and fixing agent for the cotton side of polyester/cotton blended fabrics and the thermosol temperature on the dyeing properties and fastness were investigated, when the polyester/cotton blended fabrics were dyed with a disperse dye which was able to dye both side of fiber by one bath one step thermosol process. The obtained results are as follows; The dye adsorption decreased with the increase of cotton blend ratio in polyester/cotton blended fabrics, when the ratio of swelling and fixing agent for cotton side was constant. As the thermosol temperature increased up to 210oC, the dye adsorption were increased, but that effect was less significant when the cotton blend ratio was higher.