Structure and Properties of Sodium Lignosulfonate with Different Molecular Weight Used as Dye Dispersant

Yang, Dongjie; Li, Hui‐Jing; Qin, Yanlin; Zhong, Ruisheng; Bai, Mengxian; Qiu, Xueqing

doi:10.1080/01932691.2014.916221

Cited by 72 publications

(41 citation statements)

References 15 publications

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“…Lignosulfonates (LS) are successful examples of lignin derivatives used as dispersants mostly in cement, 75 but also in other minerals, 76 coal, 77 pesticides and dyes. 78 The addition of low loadings of LS in cement mixtures greatly improves the rheological properties of the system, thus allowing the utilization of more concentrated dispersions with less water in their preparation. The major drawback of LS is that it is obtained as a side product from the sulfite pulping process that accounts only for ca.…”

Section: Dispersantsmentioning

confidence: 99%

Spherical lignin particles: a review on their sustainability and applications

et al. 2020

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Section: Dispersantsmentioning

confidence: 99%

Spherical lignin particles: a review on their sustainability and applications

et al. 2020

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“…Thish as already been observedi nt he literature. [28][29][30][31][32] Unlike the collected fractionsfrom HIC, the ultrafiltrated fractions showed good solubility in the 31 PNMR solvent mixture. The content of aliphatic and the phenolic hydroxyl groups decreasedw ith increasing molecular weight from 2.93 to 2.49 mmol g À1 and from 2.31 to 1.72 mmolg À1 ,r espectively.T he same was true for the sulfogroup content,w hich decreased from 2.01 to 1.66 mmol g À1 with increasing molecular weight.…”

Section: Influenceofmolecular Weight On Functional-group Contentsmentioning

confidence: 99%

Hydrophobic Interaction Chromatography in 2 D Liquid Chromatography Characterization of Lignosulfonates

et al. 2020

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Lignosulfonates are bulk‐scale byproducts of industrial sulfite pulping. Their amphiphilic character plays a central role in their successful application in large‐scale materials production. As an inherent feature of the chemical structure, this amphiphilic character poses a major analytical challenge. In this study, the amphiphilic behavior of an industrial lignosulfonate was investigated by hydrophobic interaction chromatography (HIC). This technique exploits hydrophobic regions present on the surface of lignosulfonates. Extensive characterization of the obtained fractions from preparative HIC, in terms of elemental composition, functional‐group content, chemical structure, and molecular weight distribution, revealed a detailed picture of the chemical composition distribution. The charge‐to‐size ratio, that is, differences in the degree of sulfonation, was the dominant factor governing separation in HIC. A combination of HIC with size exclusion chromatography showed good orthogonality of separation and demonstrated the power of this 2 D liquid chromatography approach for an in‐depth characterization, in general, and amphiphilicity, in particular.

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“…The supplier reported average molecular weight ranges of 37.000-53.000 g/mol for A-LS and 35.000-51.000 g/mol for S-LS measured using GPC. For dispersant applications, high molecular weight is important factor as it results in smaller particle size of the liquid being dispersed [43]. The Table 1.…”

Section: Gel Permeation Chromatography (Gpc) and Elemental Analysismentioning

confidence: 99%

Characterization of Wood-based Industrial Biorefinery Lignosulfonates and Supercritical Water Hydrolysis Lignin

Hemmilä

Hosseinpourpia

Αδαμόπουλος

et al. 2019

Waste Biomass Valor

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Understanding the properties of any particular biorefinery or pulping residue lignin is crucial when choosing the right lignin for the right end use. In this paper, three different residual lignin types [supercritical water hydrolysis lignin (SCWH), ammonium lignosulfonate (A-LS), and sodium lignosulfonate (S-LS)] were evaluated for their chemical structure, thermal properties and water vapor adsorption behavior. SCWH lignin was found to have a high amount of phenolic hydroxyl groups and the highest amount of β-O-4 linkages. Combined with a low ash content, it shows potential to be used for conversion into aromatic or platform chemicals. A-LS and S-LS had more aliphatic hydroxyl groups, aliphatic double bonds and C=O structures. All lignins had available C3/C5 positions, which can increase reactivity towards adhesive precursors. The glass transition temperature (Tg) data indicated that the SCWH and S-LS lignin types can be suitable for production of carbon fibers. Lignosulfonates exhibited considerable higher water vapor adsorption as compared to the SCWH lignin. In conclusion, this study demonstrated that the SCWH differed greatly from the lignosulfonates in purity, chemical structure, thermal stability and water sorption behavior. SCWH lignin showed great potential as raw material for aromatic compounds, carbon fibers, adhesives or polymers. Lignosulfonates are less suited for conversion into chemicals or carbon fibers, but due to the high amount of aliphatic hydroxyl groups, they can potentially be modified or used as adhesives, dispersants, or reinforcement material in polymers. For most value-adding applications, energy-intensive purification of the lignosulfonates would be required. Graphic Abstract

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Structure and Properties of Sodium Lignosulfonate with Different Molecular Weight Used as Dye Dispersant

Cited by 72 publications

References 15 publications

Spherical lignin particles: a review on their sustainability and applications

Spherical lignin particles: a review on their sustainability and applications

Hydrophobic Interaction Chromatography in 2 D Liquid Chromatography Characterization of Lignosulfonates

Characterization of Wood-based Industrial Biorefinery Lignosulfonates and Supercritical Water Hydrolysis Lignin

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