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Natural dyes fromEucalyptusleaf extract, quercetin, rutin, and tannin were applied to silk fabric by pad-batch and pad-dry techniques under different conditions. Ferrous sulfate was used as a mordant. The dyeing properties were evaluated by measuringK/SandCIELABvalues. In addition, the different fastness properties were evaluated. The effect of dyes at different concentration levels with respect to their colour strength was also studied.

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In this study, a micellar delivery system with an amphiphilic diblock copolymer of poly (ethylene glycol) and poly (ɛ-caprolactone) was synthesised and used to incorporate hydrophobic clove essential oil (CEO). To determine an optimal delivery system, the effects of the copolymer's hydrophobic block length and the CEO-loading content on the encapsulation of CEO were investigated. Percentages of entrapment efficiency (%EE), CEO loading (%CEO), and in vitro release profiles were determined. The size, size distribution, zeta potential, and morphology of the obtained micelles were determined by DLS, FE-SEM, and TEM. The %EE, %CEO, and in vitro release profiles of CEO incorporated in micelles were analysed by HPLC. The study revealed a sustained release profile of CEO from CEO-loaded micelles. The results indicate the successful formulation of CEO-loaded PEG-b-PCL micelle nanoparticles. It is suggested that this micelle system has considerably potential applications in the sustained release of CEO in intravascular drug delivery.

This research was concerned with dye extraction from the bark ofGarcinia Dulcis(Roxb.) Kurz and with the application of this dye for silk fabric dyeing by the pad-dry process. Silk fabrics dyed withGarcinia Dulcis(Roxb.) Kurz bark extract showed a pale yellow shade, while those dyed with alum and stannous chloride bright yellow and light yellow colour, respectively. Silk substrates dyed with CuSO4gave a yellowishgreen colour, while those dyed with FeSO4had a dark brown colour. The colour fastness to rubbing after dyeing the silk fabric treated with the mordant was investigated, the results of which showed fair to good fastness. The results confirmed that natural dyes fromGarcinia Dulcis(Roxb.) Kurz bark extract have potential applications for fabric dyeing and producing ultraviolet (UV) protective silk fabric.