Studies on the photofading of alizarin, the main component of madder

Jiang, Huiyu; Hu, Xiaodong; Wan, Jun; Yang, Jinbo

doi:10.1016/j.dyepig.2020.108940

Cited by 33 publications

(39 citation statements)

References 35 publications

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“…Natural dyes have poor light fastness. According to the reported results [ 5 ], under the visible light and ultraviolet light irradiation, the madder dye obviously fades on the cotton fabric. Therefore, it is particularly important to improve the light fastness of the madder dyed cotton fabric.…”

Section: Resultsmentioning

confidence: 99%

“…And the color tonality of the direct and mordant cotton fabrics obviously changed. This is due to the fact that the madder natural dyes are easily oxidized and decomposed at exposure to sunlight, and the coordination bonds formed by Al 3+ ions have poor light stability [ 5 ], leading to the poor light fastness of the direct and mordant dyed cotton fabrics. Furthermore, the structure of alizarin is decomposed to a variety of carboxyl compounds at sunlight condition, which increased the acidity of the dyed cotton fabrics.…”

Section: Resultsmentioning

confidence: 99%

“…According to the requirements of AATCC-183-2014, when the UPF value > 40 and UVA < 5%, the fabrics have excellent UV resistance. The reason is that more dyes in the cotton fabrics had a better ability to absorb ultraviolet light [ 5 ]. At the same time, the cross-linked network structure could effectively prevent the passage of ultraviolet light and reduce the transmittance of UV.…”

Section: Resultsmentioning

confidence: 99%

“…The antibacterial property of the cotton fabrics was tested according to GB/T 20944.3-2008 (DNP9272, ZHWY200, Shanghai Shidukai Instrument Equipment Co., Ltd., Shanghai, China). The bacteriostatic rate was calculated [Equation (5)] [20].…”

Section: Structural Characterization and Wearing Propertymentioning

confidence: 99%

“…Therefore, its direct dyeing property on the cotton fabric is poor. Alizarin has active α-hydroxyl, which can form complex structures with metal ions [ 5 ]. Normally, some metal ions are used as mordants to improve the surface color depth ( K/S ) value and color fastness of the dyed cotton fabric by madder, since the complex structures by the dye-mordant-cotton fabric make the dye be deposited on the cotton fabric in the mordant dyeing process.…”

Section: Introductionmentioning

confidence: 99%

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Dyeing Property Improvement of Madder with Polycarboxylic Acid for Cotton

Cai

Zhang

et al. 2021

Polymers

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Cotton fabrics were dyed with the madder and compounds of citric acid (CA) and dicarboxylic acids [tartaric acid (TTA), malic acid (MLA), succinic acid (SUA)] as cross-linking agents and sodium hypophosphite (SHP) as the catalyst. The molecular structures and crystal structures of the dyed cotton fabrics were analyzed using Fourier-transform infrared spectroscopy (FTIR) and X-ray diffractometry (XRD), respectively. The results showed that the polycarboxylic acids esterified with the hydroxyl groups in the dye and cellulose, respectively, and the reaction mainly occurred in the amorphous region of the cotton fabric. Compared with the direct dyed cotton fabric, the surface color depth (K/S) values of the CA, CA+TTA, CA+MLA, CA+SUA cross-linked dyed cotton fabrics increased by approximately 160%, 190%, 240%, 270%, respectively. The CA+SUA cross-linked dyed cotton fabric achieved the biggest K/S value due to the elimination of the negative effect by α-hydroxyl in TTA and MLA on esterification reaction, and the cross-linked dyed cotton fabrics had great levelness property. The washing and rubbing fastness of the cross-linked cotton fabrics were above four levels. The light resistance stability and the antibacterial property of the cross-linked dyed cotton fabrics was obviously improved. The sum of warp and weft wrinkle recovery angle (WRA) of the CA+SUA cross-linked dyed cotton fabric was 55° higher than that of raw cotton fabric, and its average UV transmittance for UVA was less than 5% and its UPF value was 50+, showing a great anti-wrinkle and anti-ultraviolet properties.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Structural Characterization and Wearing Propertymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dyeing Property Improvement of Madder with Polycarboxylic Acid for Cotton

Cai

Zhang

et al. 2021

Polymers

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Printed pH Sensors for Textile‐Based Wearables: A Conceptual and Experimental Study on Materials, Deposition Technology, and Sensing Principles

et al. 2021

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Human biofluids contain numerous known physical and chemical biomarkers that play a vital role in diagnosing the human's health status. In healthy conditions, these biofluids maintain a strict pH balance with an efficient regulation, and slight changes in pH can be used as an early detector of malfunction or disease. Sweat is such a biofluid and normal sweat has a pH in the range of pH 4.5-6.8. [1] It is possible to track dehydration [2,3] or risk of diabetes [4] and detect cystic fibrosis [5] with the pH readings of perspiration/sputum/urine.Similarly, wound healing is a complex dynamic and multifaceted process consisting of hemostasis, inflammation, proliferation, and remodeling stages. [6] During these different stages, the wound fluid pH could vary between 4.5 and 8.5, [7,8] depending on the type of wound and its complexities in healing. A recent report indicates that the wound management expenditure has grown up to 4% of the health budget contribution in Europe. [9] However, with the help of accurate determination of the wound's pH, very essential physiological information can serve as a source to simplify the entire wound diagnosis and treatment practice. [10][11][12] pH is a measure of acidity or basicity, and in 1909, Sørensen defined the pH scale as the H þ ion molar concentration on a negative logarithm scale. [13] In the same year, scientists developed a pH sensitive glass electrode. [14] Arnold Beckman designed the very first commercial pH measurement system in 1936, which brought about the production of commercial pH meters. [15] It consisted of glass electrodes where the potential difference between the working and reference electrodes indicate the analyte's pH. Those sensor systems are highly sensitive to H þ ions and stable, however, they are fragile, bulky and do not have a suitable form factor to be incorporated for human body in situ measurements. pH sensors

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The Use of the Mannich Reaction toward Amino‐Based Anthraquinone Applied in Aqueous Redox Flow Battery

Almeida,

De Silva,

Delolo

et al. 2024

Adv Energy and Sustain Res

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A water‐soluble anthraquinone derived from alizarin, 3HAAQ, is introduced as the redox‐active material in a negative potential electrolyte (anolyte) for aqueous redox flow batteries operating at pH 14. The synthesis of 3HAAQ is carried out using the Mannich reaction, which significantly improves the solubility of the new compound, an important factor for its use in RFB. Pairing with potassium ferri/ferrocyanide positive electrolyte, this flow battery exhibits an open‐circuit voltage of 1.24 V and maintains nearly 80% of the theoretical capacity at 40 mA cm−2 current density.

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Studies on the photofading of alizarin, the main component of madder

Cited by 33 publications

References 35 publications

Dyeing Property Improvement of Madder with Polycarboxylic Acid for Cotton

Dyeing Property Improvement of Madder with Polycarboxylic Acid for Cotton

Printed pH Sensors for Textile‐Based Wearables: A Conceptual and Experimental Study on Materials, Deposition Technology, and Sensing Principles

The Use of the Mannich Reaction toward Amino‐Based Anthraquinone Applied in Aqueous Redox Flow Battery

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