Dyeing of Cotton in Supercritical Carbon Dioxide

Beltrame, Pier Luigi; Castelli, Antonella; Selli, Elena; Mossa, Andrea; Testa, Giovanni; Bonfatti, Anna Maria; Seves, Alberto

doi:10.1016/s0143-7208(98)00016-3

Cited by 74 publications

(56 citation statements)

References 12 publications

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“…Reportedly, supercritical carbon dioxide (scCO 2 ) can be used to load polymeric carriers with antimicrobial substances [2][3][4][5][6][7][8][9][10][11][12], vitamins [13], drugs [14,15], dyes [16,17], and so on. There are two distinctive mechanisms of SSI.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Acetate Based Material with Antibacterial Properties Created by Supercritical Solvent Impregnation

Milovanović

Adamović

Aksentijević

et al. 2017

International Journal of Polymer Science

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Supercritical CO 2 was used as a green solvent and impregnation medium for loading cellulose acetate beads with carvacrol in order to obtain a biomaterial with antibacterial properties. Supercritical solvent impregnation was performed in a high-pressure view cell at temperature of 50 ∘ C and pressures of 10, 21, and 30 MPa with the processing time ranging from 2 to 18 h. The rate of impregnation increased with the pressure increase. However, maximum impregnation yield (round 60%) was not affected by the pressure applied. Selected samples of the impregnated cellulose acetate containing 6-60% of carvacrol were proven to have considerable antibacterial effect against Gram-positive and Gram-negative bacterial strains including methicillin-resistant Staphylococcus aureus which causes severe infections in humans and animals. In addition, cellulose acetate beads containing 6.0-33.6% of carvacrol were shown to have a porous structure with submicron pores which is of interest for the controlled delivery applications.

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Section: Introductionmentioning

confidence: 99%

Cellulose Acetate Based Material with Antibacterial Properties Created by Supercritical Solvent Impregnation

Milovanović

Adamović

Aksentijević

et al. 2017

International Journal of Polymer Science

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“…Poly(ethylene terephthalate) − PET is the most important polyester with a variety of applications, from textile fibers to bottles for carbonated beverages and for photographic film packaging and automobile components. Studies have recently been published on the dyeing of polymers, especially polyesters (Beltrame et al, 1998;De Giorgi, et al, 2000). According to Stinson and Obendorf (1996), PET absorbs only 0.4% of the water and does not swell in water.…”

Section: Introductionmentioning

confidence: 99%

Impregnation of pet films and PHB granules with curcumin in supercritical CO2

Herek

Oliveira

Rubira

et al. 2006

Braz. J. Chem. Eng.

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-The process of dyeing poly(ethylene terephthalate) -PET films at 50, 60 and 65ºC and poly(hydroxybutyrate) -PHB granules at 60, 70 and 80ºC using supercritical carbon dioxide (scCO 2 ) as solvent and ethanol as cosolvent was studied by DSC, TGA analysis and measurements of shrinkage to determine the morphological modifications caused by the scCO 2 treatment of these materials. A comparison of the effects of annealing both polymers in scCO 2 provided evidence that PHB had plasticization activity due to its crystallinity and that PET favored the dyeing process at high pressure when its temperature was raised to close to the T g value. DSC and TGA measurements were obtained for all the samples. The DSC results showed that there was no significant structural change and the TGA data showed that thermal stability was not affected in the samples analyzed.

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“…Colour yields increased with temperature, pressure and dying time (Liu et al 2006). ScCO 2 with synthetic and natural dyes obtained by scCO 2 extraction has been employed by Beltrame et al (1998) to dye cotton. PEG was used as a plasticizing agent of cellulose and benzamide as a synergistic agent as it is a good solvent for disperse dyes given its ability to form hydrogen bonds with cellulose and PEG, thus favouring dye entrapment (Beltrame et al 1998).…”

Section: Impregnation Of Cellulose Using Sccomentioning

confidence: 99%

Cellulosic materials as biopolymers and supercritical CO₂as a green process: chemistry and applications

Medina-González

Camy

Condoret

2012

International Journal of Sustainable Engineering

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. In this review, we describe the use of supercritical CO 2 (scCO 2 ) in several cellulose applications. The focus is on different technologies that either exist or are expected to emerge in the near future. The applications are wide from the extraction of hazardous wastes to the cleaning and reuse of paper or production of glucose. To put this topic in context, cellulose chemistry and its interactions with scCO 2 are described. The aim of this study was to discuss the new emerging technologies and trends concerning cellulosic materials processed in scCO 2 such as cellulose drying to obtain aerogels, foams and other microporous materials, impregnation of cellulose, extraction of highly valuable compounds from plants and metallic residues from treated wood. Especially, in the bio-fuel production field, we address the pre-treatment of cellulose in scCO 2 to improve fermentation to ethanol by cellulase enzymes. Other reactions of cellulosic materials such as organic inorganic composites fabrication and de-polymerisation have been considered. Cellulose treatment by scCO 2 has been discussed as well. Finally, other applications like deacidification of paper and cellulosic membranes fabrication in scCO 2 have been reviewed. Examples of the discussed technologies are included as well.

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Dyeing of Cotton in Supercritical Carbon Dioxide

Cited by 74 publications

References 12 publications

Cellulose Acetate Based Material with Antibacterial Properties Created by Supercritical Solvent Impregnation

Cellulose Acetate Based Material with Antibacterial Properties Created by Supercritical Solvent Impregnation

Impregnation of pet films and PHB granules with curcumin in supercritical CO2

Cellulosic materials as biopolymers and supercritical CO₂as a green process: chemistry and applications

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Dyeing of Cotton in Supercritical Carbon Dioxide

Cited by 74 publications

References 12 publications

Cellulose Acetate Based Material with Antibacterial Properties Created by Supercritical Solvent Impregnation

Cellulose Acetate Based Material with Antibacterial Properties Created by Supercritical Solvent Impregnation

Impregnation of pet films and PHB granules with curcumin in supercritical CO2

Cellulosic materials as biopolymers and supercritical CO2as a green process: chemistry and applications

Contact Info

Product

Resources

About

Cellulosic materials as biopolymers and supercritical CO₂as a green process: chemistry and applications