Montra Chairat - Academia.edu (original) (raw)

Papers by Montra Chairat

Arab journal of basic and applied sciences, May 31, 2023

The Journal of The Textile Institute, 2022

Dyes and Pigments, 2005

Adsorption and kinetic studies of lac dyeing of silk were investigated using, as optimal conditio... more Adsorption and kinetic studies of lac dyeing of silk were investigated using, as optimal conditions, a pH of 3.0, a material to liquor ratio (MLR) of 1:100, an initial dye concentration of 450 mg/L and 60 min contact time. The progress of dye adsorption was monitored at l max 487 nm by visible spectroscopy. The experimental data fitted well to the Langmuir and Freundlich isotherms with a high correlation coefficient (R 2). The pseudo second-order kinetic model was indicated with the activation energy of 47.5 kJ/mol. It is suggested that the overall rate of lac dye adsorption is likely to be controlled by the chemical process. The values of the enthalpy (DH #) and entropy of activation (DS #) were 44.7 kJ/mol and ÿ175.7 J/mol K, respectively. The free energy of activation (DG #) at 30 C was 97.9 kJ/mol. The activation parameters with and without erythrolaccin in the lac dye were similar, consistent with erythrolaccin only having a slight effect on the lac dyeing of silk. The free energy (DG), enthalpy (DH) and entropy (DS) terms for the lac dyeing were also determined, and the negative values of DG and DH obtained indicated that the lac dye adsorption process is a spontaneous and an exothermic one.

Cotton yarns have been pretreated with the additives, such as chitosan, microcrystalline chitosan... more Cotton yarns have been pretreated with the additives, such as chitosan, microcrystalline chitosan, quaternized chitosan &aqueous extract from the fruit of Diospyros mollis Griff, as well as with the commercial formaldehyde-free cationic fixingagent (Sera® Fast C-NC) & alum (post-mordanting), and their dyeing fastness properties are studied. These treated cottonyarns are then dyed with the annatto dye extract from Bixa orellana L. (Achiote) seeds and tested for different propertiesincluding K/S value, light fastness, and wash fastness. Pre-treatment of cotton yarn with chitosan or microcrystallinechitosan solution (together with glyoxal cross-linking) or quaternized chitosan, or Sera® Fast C-NC before dyeing, shows abetter color depth (K/S) and improved wash fastness properties in comparison to yarn with alum post-mordanting and theuntreated cotton yarn. Improved light fastness is also obtained on inclusion of the anti-oxidant ascorbic acid in the posttreatmentprotocol. These additiv...

The Journal of The Textile Institute

Walailak Journal of Science and Technology (WJST)

Polydopamine (PDA) is a kind of mussel-inspired material. It has been applied as a coating and an... more Polydopamine (PDA) is a kind of mussel-inspired material. It has been applied as a coating and an adsorbent material. As an adsorbent, the PDA microspheres were used to remove methylene blue (MB) in aqueous solution. It was reported that the efficiency of the PDA adsorbent depends on the pH of the solution. Furthermore, in a pH range of 3 - 10, the hydroxyl and amine functional groups of PDA can be either protonated or deprotonated. The change of the net charge of PDA can affect the intermolecular interactions between PDA and MB. It was proposed that both of the electrostatic and p-p interactions should be dominant in the acidic and basic solutions. Therefore, the structural properties and intermolecular interactions of the PDA-MB complex should be investigated. Such an investigation can be useful for the improvement of the PDA microspheres for the other dyes. To get insight into the roles of PDA structure and its role as an interesting adsorbent for MB, the PDA-MB complex formation...

Cellulose Chemistry and Technology

In this study, silk yarn was treated with polydopamine nanoparticles (PDA) formed in situ by oxid... more In this study, silk yarn was treated with polydopamine nanoparticles (PDA) formed in situ by oxidation of a dopamine solution in the presence of oxygen. The adsorption kinetics of lac dye on the PDA-coated silk yarn at different temperatures was investigated. The values of the dye adsorption rate constant (k) at different temperature were calculated using the modified Cegarra-Puente equation. The results showed that the dye adsorption rate constant (k) and the diffusion coefficient (D) increased with an increasing temperature, which was consistent with a kinetically controlled diffusion process. The activation energy (E a) was found to be 51.2 kJ mol-1. The adsorption isotherm of lac dye on the PDA-coated silk yarn at pH 2.50 was studied in a batch system. The findings revealed that the adsorption isotherm could be described by the Langmuir isotherm (R 2 > 0.99). The results indicated that the pretreatment of silk yarn with PDA, followed by dyeing with an aqueous solution of lac dye and then post-mordanting with alum, exhibited color fastness to light and washing at rating levels of 4 and 3-4, respectively.

The Journal of The Textile Institute

Abstract In this research, eri silk yarn was dyed with polydopamine (PDA) formed in situ by oxida... more Abstract In this research, eri silk yarn was dyed with polydopamine (PDA) formed in situ by oxidation of a dopamine (DA) solution under alkaline condition at pH 8.5 in the presence of oxygen. Eri silk yarn was immersed in different initial concentrations of DA solution (0.010 – 5.00 mg mL−1) for 24 h, after which the yarn changed to a black/brown color. This indicated that PDA could adhere on the surface of eri silk yarn via Schiff base reactions and/or Michael-type additions. The surface morphologies of PDA-dyed silk yarn in different initial concentrations of DA solution were characterized using a field emission scanning electron microscope (FE-SEM) and Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopic analysis. It was found that the surface of eri silk yarn became obviously rough, which indicated that PDA was successfully dyed on the surface of eri silk yarn. In addition, all dyed eri silk yarn exhibited a shade of brownish to black with different CIE L*, a*, and b* values. In addition, the color fastness to light and washing of the PDA-dyed eri silk yarn samples using 1.00 – 5.00 mg mL−1 DA solutions were found to be at very good rating levels of 6 and 4-5, respectively. Therefore, PDA could act as both a dye for eri silk itself and as a photo-protective agent.

The Journal of The Textile Institute

Abstract Flavonoid constituents from the aqueous extract of the fruit pericarp of P. macarthurii ... more Abstract Flavonoid constituents from the aqueous extract of the fruit pericarp of P. macarthurii have potential use as dyestuffs for silk. In this work, silk yarn which was pretreated with a microcrystalline chitosan as well as a polydopamine, followed by dyeing with the P. macarthurii extract provided better depth of shade (K/S) and also gave better fastness to light and washing than the untreated dyed silk yarn. In addition, it was found that simultaneous mordanting with copper sulfate exhibited better fastness to light compared with the other samples. Post-mordanting silk yarn with a bio-mordant solution from Memecylon scutellatum leaves or alum gave good light and wash fastness of the resultant dyed yarn compared with the untreated dyed silk yarn. Moreover, the dyed silk yarn with this extract showed antifungal activity against Aspergillus niger, Penicillium chrysogenum and Candida albicans.

Coloration Technology, 2016

The hypothesis that the dried, ground biomass of the red marine alga Gracilaria tenuistipitata co... more The hypothesis that the dried, ground biomass of the red marine alga Gracilaria tenuistipitata could be used for the efficient removal of lac dye from aqueous solution was assessed in this work. The effects of parameters such as initial pH, biosorbent dosage, contact time, initial dye concentration, and temperature on the biosorption capacity of the dye were investigated. Equilibrium data were analysed using Langmuir, Freundlich, and Temkin isotherm models, and the Freundlich model provided the highest coefficient of determination values. Biosorption kinetic data were successfully described with a pseudo-second-order model at initial dye concentrations of 50, 80, 100, and 120 mg l −1. The thermodynamic parameters of biosorptionenthalpy change (∆H° = −30.64 kJ mol −1), free energy change (∆G° = 4.32 kJ mol −1 at 303 K to 7.78 kJ mol −1 at 333 K), and entropy change (∆S° = −115.38 J mol −1 K −1)-were determined. The negative value of the enthalpy change and positive values of the free energy change indicate that the biosorption process is exothermic and non-spontaneous. The negative value of the entropy change is consistent with decreased randomness at the solid-liquid interface with dye biosorption. Attenuated total reflectance-Fourier transform infrared spectroscopic analysis confirmed the presence of lac dye on the G. tenuistipitata material. The efficiency of lac dye removal by this biomass material at 20 g l −1 and with an initial dye concentration of 50 mg l −1 in acidic solution was 71%, which indicated its potential usefulness as a new dye biosorbent.

Coloration Technology, 2015

Effects of additives on the dyeing of cotton yarn with the aqueous extract of Effects of additive... more Effects of additives on the dyeing of cotton yarn with the aqueous extract of Effects of additives on the dyeing of cotton yarn with the aqueous extract of Combretum latifolium Blume stems Combretum latifolium Blume stems

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013

Fibers and Polymers, 2010

Fibers and Polymers, 2007

Coloration Technology, 2011

Flavonoid constituents from the aqueous extract of the leaves of Eupatorium odoratum, an invasive... more Flavonoid constituents from the aqueous extract of the leaves of Eupatorium odoratum, an invasive weed in Thailand, have potential use as dyestuffs for cotton dyeing. It was found that cotton yarn, which was pretreated with a chitosan solution (with and without a crosslinking glyoxal solution), followed by dyeing with E. odoratum extract in the presence of the inorganic mordant, alum, provided better depth of shade (K ⁄ S) and also gave better fastness to light and washing than the untreated cotton yarn. Pretreated cotton yarn with the biomordant solution from Memecylon scutellatum leaves gave relatively poor light and wash fastness of the resultant dyed cotton in the presence of alum. From the toxicity studies, the aqueous extract of the leaves of E. odoratum before and after dyeing showed a high toxicity level to the earthworm (Diplocardia communis) and the guppy fish (Poecilia reticulate). Therefore, it is strongly suggested that E. odoratum aqueous extract after dyeing should be significantly diluted before discharged into the environment.

masterorg.wu.ac.th

A thermodynamic study of lac dyeing of silk pretreated with chitosan at pH 3.0 was investigated i... more A thermodynamic study of lac dyeing of silk pretreated with chitosan at pH 3.0 was investigated in a batch system. It was found that the adsorption of lac dye on silk pretreated with chitosan could be described by the Langmuir isotherm. The results showed that the pretreatment of silk with chitosan provided an enhancement of dye uptake on silk and also decreased the dye desorption from silk yarn compared with the results in the absence of chitosan. The negative value of the enthalpy change (ΔHº) for the adsorption of lac dye on silk pretreated with chitosan indicated that the adsorption process was an exothermic one.

Arab journal of basic and applied sciences, May 31, 2023

The Journal of The Textile Institute, 2022

Dyes and Pigments, 2005

Adsorption and kinetic studies of lac dyeing of silk were investigated using, as optimal conditio... more Adsorption and kinetic studies of lac dyeing of silk were investigated using, as optimal conditions, a pH of 3.0, a material to liquor ratio (MLR) of 1:100, an initial dye concentration of 450 mg/L and 60 min contact time. The progress of dye adsorption was monitored at l max 487 nm by visible spectroscopy. The experimental data fitted well to the Langmuir and Freundlich isotherms with a high correlation coefficient (R 2). The pseudo second-order kinetic model was indicated with the activation energy of 47.5 kJ/mol. It is suggested that the overall rate of lac dye adsorption is likely to be controlled by the chemical process. The values of the enthalpy (DH #) and entropy of activation (DS #) were 44.7 kJ/mol and ÿ175.7 J/mol K, respectively. The free energy of activation (DG #) at 30 C was 97.9 kJ/mol. The activation parameters with and without erythrolaccin in the lac dye were similar, consistent with erythrolaccin only having a slight effect on the lac dyeing of silk. The free energy (DG), enthalpy (DH) and entropy (DS) terms for the lac dyeing were also determined, and the negative values of DG and DH obtained indicated that the lac dye adsorption process is a spontaneous and an exothermic one.

Cotton yarns have been pretreated with the additives, such as chitosan, microcrystalline chitosan... more Cotton yarns have been pretreated with the additives, such as chitosan, microcrystalline chitosan, quaternized chitosan &aqueous extract from the fruit of Diospyros mollis Griff, as well as with the commercial formaldehyde-free cationic fixingagent (Sera® Fast C-NC) & alum (post-mordanting), and their dyeing fastness properties are studied. These treated cottonyarns are then dyed with the annatto dye extract from Bixa orellana L. (Achiote) seeds and tested for different propertiesincluding K/S value, light fastness, and wash fastness. Pre-treatment of cotton yarn with chitosan or microcrystallinechitosan solution (together with glyoxal cross-linking) or quaternized chitosan, or Sera® Fast C-NC before dyeing, shows abetter color depth (K/S) and improved wash fastness properties in comparison to yarn with alum post-mordanting and theuntreated cotton yarn. Improved light fastness is also obtained on inclusion of the anti-oxidant ascorbic acid in the posttreatmentprotocol. These additiv...

The Journal of The Textile Institute

Walailak Journal of Science and Technology (WJST)

Polydopamine (PDA) is a kind of mussel-inspired material. It has been applied as a coating and an... more Polydopamine (PDA) is a kind of mussel-inspired material. It has been applied as a coating and an adsorbent material. As an adsorbent, the PDA microspheres were used to remove methylene blue (MB) in aqueous solution. It was reported that the efficiency of the PDA adsorbent depends on the pH of the solution. Furthermore, in a pH range of 3 - 10, the hydroxyl and amine functional groups of PDA can be either protonated or deprotonated. The change of the net charge of PDA can affect the intermolecular interactions between PDA and MB. It was proposed that both of the electrostatic and p-p interactions should be dominant in the acidic and basic solutions. Therefore, the structural properties and intermolecular interactions of the PDA-MB complex should be investigated. Such an investigation can be useful for the improvement of the PDA microspheres for the other dyes. To get insight into the roles of PDA structure and its role as an interesting adsorbent for MB, the PDA-MB complex formation...

Cellulose Chemistry and Technology

In this study, silk yarn was treated with polydopamine nanoparticles (PDA) formed in situ by oxid... more In this study, silk yarn was treated with polydopamine nanoparticles (PDA) formed in situ by oxidation of a dopamine solution in the presence of oxygen. The adsorption kinetics of lac dye on the PDA-coated silk yarn at different temperatures was investigated. The values of the dye adsorption rate constant (k) at different temperature were calculated using the modified Cegarra-Puente equation. The results showed that the dye adsorption rate constant (k) and the diffusion coefficient (D) increased with an increasing temperature, which was consistent with a kinetically controlled diffusion process. The activation energy (E a) was found to be 51.2 kJ mol-1. The adsorption isotherm of lac dye on the PDA-coated silk yarn at pH 2.50 was studied in a batch system. The findings revealed that the adsorption isotherm could be described by the Langmuir isotherm (R 2 > 0.99). The results indicated that the pretreatment of silk yarn with PDA, followed by dyeing with an aqueous solution of lac dye and then post-mordanting with alum, exhibited color fastness to light and washing at rating levels of 4 and 3-4, respectively.

The Journal of The Textile Institute

Abstract In this research, eri silk yarn was dyed with polydopamine (PDA) formed in situ by oxida... more Abstract In this research, eri silk yarn was dyed with polydopamine (PDA) formed in situ by oxidation of a dopamine (DA) solution under alkaline condition at pH 8.5 in the presence of oxygen. Eri silk yarn was immersed in different initial concentrations of DA solution (0.010 – 5.00 mg mL−1) for 24 h, after which the yarn changed to a black/brown color. This indicated that PDA could adhere on the surface of eri silk yarn via Schiff base reactions and/or Michael-type additions. The surface morphologies of PDA-dyed silk yarn in different initial concentrations of DA solution were characterized using a field emission scanning electron microscope (FE-SEM) and Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopic analysis. It was found that the surface of eri silk yarn became obviously rough, which indicated that PDA was successfully dyed on the surface of eri silk yarn. In addition, all dyed eri silk yarn exhibited a shade of brownish to black with different CIE L*, a*, and b* values. In addition, the color fastness to light and washing of the PDA-dyed eri silk yarn samples using 1.00 – 5.00 mg mL−1 DA solutions were found to be at very good rating levels of 6 and 4-5, respectively. Therefore, PDA could act as both a dye for eri silk itself and as a photo-protective agent.

The Journal of The Textile Institute

Abstract Flavonoid constituents from the aqueous extract of the fruit pericarp of P. macarthurii ... more Abstract Flavonoid constituents from the aqueous extract of the fruit pericarp of P. macarthurii have potential use as dyestuffs for silk. In this work, silk yarn which was pretreated with a microcrystalline chitosan as well as a polydopamine, followed by dyeing with the P. macarthurii extract provided better depth of shade (K/S) and also gave better fastness to light and washing than the untreated dyed silk yarn. In addition, it was found that simultaneous mordanting with copper sulfate exhibited better fastness to light compared with the other samples. Post-mordanting silk yarn with a bio-mordant solution from Memecylon scutellatum leaves or alum gave good light and wash fastness of the resultant dyed yarn compared with the untreated dyed silk yarn. Moreover, the dyed silk yarn with this extract showed antifungal activity against Aspergillus niger, Penicillium chrysogenum and Candida albicans.

Coloration Technology, 2016

The hypothesis that the dried, ground biomass of the red marine alga Gracilaria tenuistipitata co... more The hypothesis that the dried, ground biomass of the red marine alga Gracilaria tenuistipitata could be used for the efficient removal of lac dye from aqueous solution was assessed in this work. The effects of parameters such as initial pH, biosorbent dosage, contact time, initial dye concentration, and temperature on the biosorption capacity of the dye were investigated. Equilibrium data were analysed using Langmuir, Freundlich, and Temkin isotherm models, and the Freundlich model provided the highest coefficient of determination values. Biosorption kinetic data were successfully described with a pseudo-second-order model at initial dye concentrations of 50, 80, 100, and 120 mg l −1. The thermodynamic parameters of biosorptionenthalpy change (∆H° = −30.64 kJ mol −1), free energy change (∆G° = 4.32 kJ mol −1 at 303 K to 7.78 kJ mol −1 at 333 K), and entropy change (∆S° = −115.38 J mol −1 K −1)-were determined. The negative value of the enthalpy change and positive values of the free energy change indicate that the biosorption process is exothermic and non-spontaneous. The negative value of the entropy change is consistent with decreased randomness at the solid-liquid interface with dye biosorption. Attenuated total reflectance-Fourier transform infrared spectroscopic analysis confirmed the presence of lac dye on the G. tenuistipitata material. The efficiency of lac dye removal by this biomass material at 20 g l −1 and with an initial dye concentration of 50 mg l −1 in acidic solution was 71%, which indicated its potential usefulness as a new dye biosorbent.

Coloration Technology, 2015

Effects of additives on the dyeing of cotton yarn with the aqueous extract of Effects of additive... more Effects of additives on the dyeing of cotton yarn with the aqueous extract of Effects of additives on the dyeing of cotton yarn with the aqueous extract of Combretum latifolium Blume stems Combretum latifolium Blume stems

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013

Fibers and Polymers, 2010

Fibers and Polymers, 2007

Coloration Technology, 2011

Flavonoid constituents from the aqueous extract of the leaves of Eupatorium odoratum, an invasive... more Flavonoid constituents from the aqueous extract of the leaves of Eupatorium odoratum, an invasive weed in Thailand, have potential use as dyestuffs for cotton dyeing. It was found that cotton yarn, which was pretreated with a chitosan solution (with and without a crosslinking glyoxal solution), followed by dyeing with E. odoratum extract in the presence of the inorganic mordant, alum, provided better depth of shade (K ⁄ S) and also gave better fastness to light and washing than the untreated cotton yarn. Pretreated cotton yarn with the biomordant solution from Memecylon scutellatum leaves gave relatively poor light and wash fastness of the resultant dyed cotton in the presence of alum. From the toxicity studies, the aqueous extract of the leaves of E. odoratum before and after dyeing showed a high toxicity level to the earthworm (Diplocardia communis) and the guppy fish (Poecilia reticulate). Therefore, it is strongly suggested that E. odoratum aqueous extract after dyeing should be significantly diluted before discharged into the environment.

masterorg.wu.ac.th

A thermodynamic study of lac dyeing of silk pretreated with chitosan at pH 3.0 was investigated i... more A thermodynamic study of lac dyeing of silk pretreated with chitosan at pH 3.0 was investigated in a batch system. It was found that the adsorption of lac dye on silk pretreated with chitosan could be described by the Langmuir isotherm. The results showed that the pretreatment of silk with chitosan provided an enhancement of dye uptake on silk and also decreased the dye desorption from silk yarn compared with the results in the absence of chitosan. The negative value of the enthalpy change (ΔHº) for the adsorption of lac dye on silk pretreated with chitosan indicated that the adsorption process was an exothermic one.