Effects of bolaform electrolytes on the interaction between a water-soluble polymer and sulphonated monoazo dyes. Part 4: Dyes containing two sulphonate groups and aromatic bolaform electrolytes with different chain length of the spacer groups

Hamada, Kunihiro; Satomura, Kyoko; Mitsuishi, Masaru

doi:10.1016/0143-7208(96)00007-1

Cited by 13 publications

(15 citation statements)

References 10 publications

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“…This should be due to the change in the hydrophobicity or hydrophilicity of the dyes by the substituent. In addition, similar tendency was observed for the other acid dye molecules such as methyl orange, its homologues [26,[37][38][39][40][41][42], azo dyes having different chain length of alkyl groups [28], fluorinated azo dyes [34,37,43], and so on [29][30][31][32]. For all the dyes used in the present study, the binding constants decreased with an increase in PVP molecular weight.…”

Section: Resultssupporting

confidence: 59%

“…This suggests that the anionic groups (sulfonate groups) of the dyes are believed to interact with the positively charged pyrrolidone rings (pyrrolidone carries partially positive charge on the nitrogen atom) [26,27], i.e. the electrostatic interaction is effective [28][29][30][31][32].…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, we assumed the following single equilibrium : (1) where D, P and D·P express the dye, PVP and dye/PVP complex, respectively. From this assumption, equation 2 is derived for determination of the binding constant, Kbind, of the dyes and PVP [8,[28][29][30][31][32]. (2) where C0 the total dye concentration, CP the total PVP concentration, εf the extinction coefficient of the free dye, εb the extinction coefficient of the bound dye, and A = C0 + Cp + 1/Kbind.…”

Section: Resultsmentioning

confidence: 99%

“…(2) where C0 the total dye concentration, CP the total PVP concentration, εf the extinction coefficient of the free dye, εb the extinction coefficient of the bound dye, and A = C0 + Cp + 1/Kbind. On the basis of equation 2, the binding constant, Kbind, and the extinction coefficient of the bound dye, εb, were calculated using the nonlinear least-squares method (SigmaPlot, SPSS Inc.) [8,[28][29][30][31][32]. The solid lines in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Polymer Molecular Weight on the Interaction between Acid Dyes and Poly(vinylpyrrolidone) in Inkjet Ink for Textiles

2011

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Section: Resultssupporting

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Effects of Polymer Molecular Weight on the Interaction between Acid Dyes and Poly(vinylpyrrolidone) in Inkjet Ink for Textiles

2011

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“…On the basis of eqn (11), the binding constant, K bind , and the extinction coefficient of the bound dye, ε b, were calculated by using the nonlinear least-squares method (SigmaPlot, SPSS Inc.) [37][38][39][40][41]. The binding constants, K bind , thus calculated are given in Table 3.…”

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confidence: 99%

Dye aggregation and interaction of dyes with a water‐soluble polymer in ink‐jet ink for textiles

Park

Hirata

Hamada

2012

Coloration Technology

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Detailed understanding of the interaction between dyes and additives and the aggregation behavior of the dye molecules in aqueous solutions is required to develop inkjet ink for textiles. In the present study, the aggregation behavior of three acid dyes (C. I. Acid Red 88, 13, and 27) containing different number of sulfonate groups in aqueous solutions was investigated by means of visible absorption spectroscopy. As a result, the higher the solubility of the dyes in water (the larger the number of sulfonate groups in the dyes), the lower are the aggregation constants of the dyes. For all the dyes, the aggregation constants decreased with increasing temperature, indicating the exothermic process of the dye aggregation. The thermodynamic process for C. I. AcidRed 88 having one sulfonate group is less enthalpic and more entropic than that for C. I. Acid Red 13 containing two sulfonate groups. C. I. Acid Red 27 including three sulfonate groups hardly form any aggregates. To elucidate the effects of the polymer additive, the binding constants of the dyes with the water-soluble polymer, poly(vinylpyrrolidone) (PVP), and the aggregation constants of the dyes in aqueous  Corresponding author. Tel.: +81 268 21 5411; fax: +81 268 21 5391 E-mail address: khamada@shinshu-u.ac.jp (K. Hamada) 2 polymer solutions were also estimated. The binding constants were also influenced by the number of the sulfonate groups in the acid dyes: the larger number of sulfonate groups diminished the binding constants. The aggregation constants in the presence of PVP were smaller than those in its absence at every temperature for all the dyes. This suggests that PVP has disaggregation effects. Furthermore, PVP makes the aggregation process less enthalpic with a greater entropic change. Thus, the aggregation process of the dyes in the polymer solutions is thermodynamically different from that in water, reflecting the interactions between the dyes and the polymer.

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Confocal Raman depth imaging tracking on the diffusion process of single and two-component reactive dyes in a single viscose fiber

Dai

Zhou

et al. 2021

Dyes and Pigments

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Effects of bolaform electrolytes on the interaction between a water-soluble polymer and sulphonated monoazo dyes. Part 4: Dyes containing two sulphonate groups and aromatic bolaform electrolytes with different chain length of the spacer groups

Cited by 13 publications

References 10 publications

Effects of Polymer Molecular Weight on the Interaction between Acid Dyes and Poly(vinylpyrrolidone) in Inkjet Ink for Textiles

Effects of Polymer Molecular Weight on the Interaction between Acid Dyes and Poly(vinylpyrrolidone) in Inkjet Ink for Textiles

Dye aggregation and interaction of dyes with a water‐soluble polymer in ink‐jet ink for textiles

Confocal Raman depth imaging tracking on the diffusion process of single and two-component reactive dyes in a single viscose fiber

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