Analysis of Amur Cork Tree Extract and Dyed Silk upon Thermal Degradation Treatment

Ahn, Cheunsoon

doi:10.5850/jksct.2011.35.10.1228

Cited by 4 publications

(8 citation statements)

References 25 publications

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“…Different degradation products evolved after 100°C and peroxide/UV treatments and the latter proved to be the more accelerated method. Ahn (2011) examined the degradation of amur cork tree dye and its silk dyeings using the liquid chromatography mass spectrometry (HPLC-MS) after thermally degrading the samples in 100°C oven. The results suggested that there was a direct relationship between the color change of amur cork tree dyed silk and the berberine content in amur cork tree dye (Ahn, 2011).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Thermal degradation in oven is based on the fact that high temperature accelerates the oxidation of organic materials (Ahn, 2011). The oxidation reaction in oven is said to accelerate two times by every 2°C increase in temperature (Ahn, 2011;Connors, 1990;Ramos et al, 1995). And since the textiles in burial context undergo oxidation by the soil organic environment during the long-term burial, thermal treatment can be an alternative to simulating the burial induced degradation of organic textiles (Ahn, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The oxidation reaction in oven is said to accelerate two times by every 2°C increase in temperature (Ahn, 2011;Connors, 1990;Ramos et al, 1995). And since the textiles in burial context undergo oxidation by the soil organic environment during the long-term burial, thermal treatment can be an alternative to simulating the burial induced degradation of organic textiles (Ahn, 2011). In this research, the six major dyes-indigotin, indirubin, berberine, palmatine, alizarin, and purpurin-were thermally degraded in liquid dye form and also in silk dyed with five of these dyes (excluding indirubin) using alum mordanting or iron mordanting procedure.…”

Section: Introductionmentioning

confidence: 99%

“…100°C was chosen as the thermal degradation temperature since it was assumed that 100°C will give a better long-term degradation environment than higher temperature used in the previous research (Brushwood, 1988;Needles & Nowak, 1989), and that such long-term degradation would give oxidative degradation comparable to which is expected in the long-term burial degradation. This temperature was successfully used in the previous research in analyzing the results of thermal degradation of alizarin and Phellodendron bark using gas chromatography mass spectrometry (Ahn, 2011;Ahn & Obendorf, 2004). Indirubin was used in the degradation of liquid dye, but it was not used for dyeing the silk since its effect on color of dyed fabric is expected to be much less significant than indigotin considering the low composition of indirubin in indigo plant (Maugard et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Thermal degradation of natural dyes and their analysis using HPLC-DAD-MS

Ahn

Zeng

et al. 2014

Fashion and Textiles

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Berberine, palmatine, alizarin, purpurin, indigotin, and indirubin which were the major coloring compounds of Phellodendron bark, madder, and indigo plant were thermally degraded in 100°C oven in liquid dye form and also in silk dyed with five of these pigments. A mixed dye solution of six coloring compounds was prepared in DMSO solution and was thermally degraded for up to 7 days. Silk were dyed using either a mixed dye solution of five dyes or individual dye solutions and each were degraded for 7 and 14 days, respectively, and the dye was extracted from the samples for the HPLC analysis. The concentration of coloring compounds in the degraded samples were analyzed by HPLC-DAD-MS and the color difference (ΔE) of the degraded silk was examined using a spectro-colorimeter. Alizarin and purpurin were more resistance to degradation than other coloring compounds both when in solution form and in silk dyeings. And such result was verified by the color difference measurement of the degraded silk dyed with individual dye solution. The resistance of alizarin and purpurin to thermal degradation was highly likely due to the fomation of fiber-metal-dye chelated complex by alum or iron mordanting before dyeing.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal degradation of natural dyes and their analysis using HPLC-DAD-MS

Ahn

Zeng

et al. 2014

Fashion and Textiles

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Thermo-oxidative and weathering degradation affecting coloration performance of lac dye

Nacowong

Saikrasun

2016

Fash Text

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Thermo-oxidative stability of lac dye was studied by simultaneous thermogravimetry (TG) and differential scanning calorimetry under nonisothermal and isothermal modes in air. The thermal stability change of lac dye was characterized by FTIR and UV–Vis spectroscopy. The TG profiles of lac dye showed at least three steps of mass loss. The first mass loss (about 8 %) found in the range of 40–150 °C mainly corresponded to the evaporation of moisture whereas the next two major steps were found with mass losses of 50 (150–440 °C) and 25 % (440–550 °C). The FTIR results indicate that the degradation of the major mass loss step (150–440 °C) mainly involved the thermo-oxidative reaction at carboxylic groups in conjugation with the C=C bonds of the anthraquinone ring. The absorbance profiles of lac dye solutions showed that the remarkable drop of absorbability was observed when the dye was heated to elevated temperatures (>150 °C). The results obtained from isothermal investigation also indicated the thermo-oxidative stability dependence of heating temperature. The apparent activation energy of lac dye calculated using isoconversional methods was higher under dynamic than under isothermal heating. Long period of weathering exposure mainly affected the O–H bonds of hydroxyl and carboxylic groups, and hence lowering the absorbability of lac dye. These results provided helpful information that can give support in the maintenance, preparation, dyeing and application stages of lac dye.

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Identification of Natural dyes used in 16<sup>th</sup> pink Dallryeong (Official's robe in Joseon Dynasty) Excavated from Cheonan, Chungnam

Chae¹,

Ryu²

2015

Journal of the Korean Conservation Science for Cultural Propert

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Aim of this study is to identify dyestuff of the Dallryeong(official's robe in Joseon Dynasty, 16th century) excavated from Yuryang-dong, Cheonan, in 1996. For this purpose, extracted dyestuffs from Dallryeong fabric and from natural dyestuffs for red color(safflower, Sapanwood, Madder) which are presumed to have been used in the Dallryeong, are analyzed and compared by high performance liquid chromatography(HPLC). As a result, HPLC chromatogram of extracts of the Dallryeong's dyestuff and safflower are showed a peak at 17.5 minutes. The UV/Vis spectra of the samples are showed the maximum absorption wavelength at 519nm. This result is identical with the analysis of the previous studies on red dyestuff of safflower. In addition, the analysis of Mass Spectrometry(MS) showed the identical result of the peak with m/z 910. Following these results, excavated pink Dallryeong were considered to have been dyed with safflower.

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Analysis of Amur Cork Tree Extract and Dyed Silk upon Thermal Degradation Treatment

Cited by 4 publications

References 25 publications

Thermal degradation of natural dyes and their analysis using HPLC-DAD-MS

Thermal degradation of natural dyes and their analysis using HPLC-DAD-MS

Thermo-oxidative and weathering degradation affecting coloration performance of lac dye

Identification of Natural dyes used in 16<sup>th</sup> pink Dallryeong (Official's robe in Joseon Dynasty) Excavated from Cheonan, Chungnam

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