Natural Dyes from Chlorella Vulgaris sp Extracted via  Supercritical Fluid Extraction Dyed on Silk Fabric

Of late, research on natural dyes is increasing due to its eco-friendly and less hazardous nature towards humankind. This study focuses on the colour coordinates and colour strength of dyes from Chlorella Vulgaris sp extracted via Supercritical Fluid Extraction (SFE). The SFE optimum parameters for yield extracts were obtained through response surface methodology along with central composite design approach. Exhaustion dyeing with meta-chrome method was performed on silk fabrics for 60 minutes at 85oC. The dyed silk fabrics were measured and analysed for their colourimetric and fastness properties in accordance to MS ISO and AATCC standards, respectively. The colour shades on the dyed silk fabrics using alum mordant were light brown while for the iron mordant were dark brown. These shades were confirmed with the colour coordinates, L*a*b*, values of the fabrics. The colour strengths of the fabrics dyed with the iron mordant at 2% and 5% dyes were the highest in comparisons with other dyed fabrics. Overall, the colourfastness of the fabrics to washing were quite low but with very good colour staining ratings and fastness to perspiration, rubbing and light.

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Dyeability of Red Cabbage Colorant on Silk Fabric Treated With Entada Spiralis Extracts

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.14.27696 ◽

2019 ◽

Vol 7 (4.14) ◽

pp. 416

Author(s):

N. Mat Shom ◽

M. I.A. Kadir ◽

M. R. Ahmad

Keyword(s):

Surface Active Agent ◽

Active Agent ◽

Hot Plate ◽

Red Cabbage ◽

Colour Strength ◽

Natural Colorants ◽

Surface Active ◽

Dyed Fabrics ◽

Silk Fabrics ◽

Colour Coordinates

Of late, dyeing fabrics with natural colorants have been the attention of the industry. Natural colorants especially from plants have the advantage of being friendly towards the environment as the extraction, processing and dyeing procedures are considered green and safe. However, most natural dyes have poor colourfastness and needed mordants to improve their dyeability. In this study, the addition of Entada spiralis was utilized as a surface modifier to improve dyeability on 100% silk fabrics using extracts from red cabbage. The plant serves as a surface-active agent to reduce the surface tension of the fabrics. The surfactant is also a natural resource and therefore is not harmful to the environment. The Entada spiralis was extracted through boiling for 30 minutes on a hot plate before treating the extracts on the fabrics. During dyeing, lime was used as the mordant simultaneously with dyeing. The dyed fabrics were evaluated for colorfastness to washing, rubbing/crocking and perspiration using the Gray Scale Standard. In addition, the dyed fabrics were also measured for their colour strength, colour coordinates and % reflectance. The results showed that dyed fabrics with Entada spiralis have darker shades in comparisons with the untreated fabric.

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Supercritical fluid extraction: a critical review of its analytical usefulness

TrAC Trends in Analytical Chemistry ◽

10.1016/s0165-9936(04)00506-0 ◽

2004 ◽

Author(s):

M ZOUGAGH

Keyword(s):

Supercritical Fluid Extraction ◽

Supercritical Fluid ◽

Critical Review ◽

Fluid Extraction

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Supercritical Fluid Extraction and Hydrodistillation of Cleosia Argentea Essential Oil

International Conference on Advances in Agricultural, Biological & Environmental Sciences (AABES-2014) Oct 15-16, 2014 Dubai (UAE) ◽

10.15242/iicbe.c1014109 ◽

2014 ◽

Keyword(s):

Essential Oil ◽

Supercritical Fluid Extraction ◽

Supercritical Fluid ◽

Fluid Extraction

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Analytical Supercritical Fluid Extraction

10.1007/978-3-642-78673-0 ◽

1994 ◽

Cited By ~ 72

Author(s):

Maria Dolores Luque de Castro ◽

Miguel Valcárcel ◽

Maria Teresa Tena

Keyword(s):

Supercritical Fluid Extraction ◽

Supercritical Fluid ◽

Fluid Extraction

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VOLATILES IN TAMAIOASA ROMANEASCA VIA SUPERCRITICAL FLUID EXTRACTION (SFE) ANALYSIS

Environmental Engineering and Management Journal ◽

10.30638/eemj.2015.029 ◽

2015 ◽

Vol 14 (2) ◽

pp. 297-302 ◽

Cited By ~ 2

Author(s):

Valeriu V. Cotea ◽

Lucia Cintia Colibaba ◽

Liliana Rotaru ◽

Bogdan Nechita ◽

Marius Niculaua ◽

...

Keyword(s):

Supercritical Fluid Extraction ◽

Supercritical Fluid ◽

Fluid Extraction

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Bioactive Compounds Obtained from Polish “Marynka” Hop Variety Using Efficient Two-Step Supercritical Fluid Extraction and Comparison of Their Antibacterial, Cytotoxic, and Anti-Proliferative Activities In Vitro

Molecules ◽

10.3390/molecules26082366 ◽

2021 ◽

Vol 26 (8) ◽

pp. 2366

Author(s):

Katarzyna Klimek ◽

Katarzyna Tyśkiewicz ◽

Malgorzata Miazga-Karska ◽

Agnieszka Dębczak ◽

Edward Rój ◽

...

Keyword(s):

Supercritical Fluid Extraction ◽

Supercritical Fluid ◽

Bioactive Compounds ◽

Crude Extract ◽

Normal Skin ◽

Extraction Methods ◽

Biological Properties ◽

Added Value ◽

Fluid Extraction

Given the health-beneficial properties of compounds from hop, there is still a growing trend towards developing successful extraction methods with the highest yield and also receiving the products with high added value. The aim of this study was to develop efficient extraction method for isolation of bioactive compounds from the Polish “Marynka” hop variety. The modified two-step supercritical fluid extraction allowed to obtain two hop samples, namely crude extract (E1), composed of α-acids, β-acids, and terpene derivatives, as well as pure xanthohumol with higher yield than that of other available methods. The post-extraction residues (R1) were re-extracted in order to obtain extract E2 enriched in xanthohumol. Then, both samples were subjected to investigation of their antibacterial (anti-acne, anti-caries), cytotoxic, and anti-proliferative activities in vitro. It was demonstrated that extract (E1) possessed more beneficial biological properties than xanthohumol. It exhibited not only better antibacterial activity against Gram-positive bacteria strains (MIC, MBC) but also possessed a higher synergistic effect with commercial antibiotics when compared to xanthohumol. Moreover, cell culture experiments revealed that crude extract neither inhibited viability nor divisions of normal skin fibroblasts as strongly as xanthohumol. In turn, calculated selectivity indexes showed that the crude extract had from slightly to significantly better selective anti-proliferative activity towards cancer cells in comparison with xanthohumol.

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