Preparation of lignosulfonate–acrylamide–chitosan ternary graft copolymer and its flocculation performance

He, Kaifei; Lou, Tao; Wang, Xue Jun; Zhao, Wenhua

doi:10.1016/j.ijbiomac.2015.09.054

Cited by 36 publications

(9 citation statements)

References 34 publications

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“…[128] Preparing an amphoteric flocculant copolymero f 50 wt %a crylamide, 25 wt %l ignosulfonates, and 25 wt %c hitosan resulted in dye removal of 50-100 %a tadosageo f 300 mg L À1 for various dyes. [129] These values were comparable with those of commercialf locculants with increasede nvironmental advantages because lignosulfonate was used.…”

Section: Flocculantssupporting

confidence: 72%

“…[128] Increasingt he dosage of lignosulfonates provided clearer effluent;h owever,t he size of flocs was adversely affected. [129] These values were comparable with those of commercialf locculants with increasede nvironmental advantages because lignosulfonate was used. [128] Preparing an amphoteric flocculant copolymero f 50 wt %a crylamide, 25 wt %l ignosulfonates, and 25 wt %c hitosan resulted in dye removal of 50-100 %a tadosageo f 300 mg L À1 for various dyes.…”

Section: Flocculantssupporting

confidence: 65%

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Production and Application of Lignosulfonates and Sulfonated Lignin

2017

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Lignin is the largest reservoir of aromatic compounds on earth and has great potential to be used in many industrial applications. Alternative methods to produce lignosulfonates from spent sulfite pulping liquors and kraft lignin from black liquor of kraft pulping process are critically reviewed herein. Furthermore, options to increase the sulfonate contents of lignin-based products are outlined and the industrial attractiveness of them is evaluated. This evaluation includes sulfonation and sulfomethylation of lignin. To increase the sulfomethylation efficiency of lignin, various scenarios, including hydrolysis, oxidation, and hydroxymethylation, were compared. The application of sulfonated lignin-based products is assessed and the impact of the properties of these products on the characteristics of their end-use application is critically evaluated. Sulfonated lignin-based products have been used as dispersants in cement admixtures and dye solutions more than other applications, and their molecular weight and degree of sulfonation were crucial in determining their efficiency. The use of lignin-based sulfonated products in composites may result in an increase in the hydrophilicity of some composites, but the sulfonated products may need to be desulfonated with an alkali and/or oxygen prior to their use in composites. To be used as a flocculant, sulfonated lignin-based products may need to be cross-linked to increase their molecular weight. The challenges associated with the use of lignin-based products in these applications are comprehensively discussed herein.

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Section: Flocculantssupporting

confidence: 72%

Section: Flocculantssupporting

confidence: 65%

Production and Application of Lignosulfonates and Sulfonated Lignin

2017

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“…The peak maximum in the DTG curve for LS/CS was at approximately 242 °C. Besides, the addition of glutaraldehyde in chitosan would result in a shift of the maximum peak for chitosan from 286 °C to lower temperature, which was attributed to the decrease in the number of inter‐ and intramolecular hydrogen bonds of chitosan, caused due to crosslinking with glutaraldehyde . Consequently, the addition of glutaraldehyde in LS/CS caused that the peak maximum was shifted to lower temperature at approximately 230 °C.…”

Section: Resultsmentioning

confidence: 99%

Influence of glutaraldehyde on the performance of a lignosulfonate/chitosan‐based medium density fiberboard adhesive

Dong

Yuan

et al. 2017

J of Applied Polymer Sci

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A lignosulfonate/chitosan‐based medium density fiberboard (MDF) adhesive has been prepared using glutaraldehyde as crosslinking agent. Optimization of glutaraldehyde/chitosan mass ratio was carried out based on characterization details involving MDFs’ mechanical and dimensional performances analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X‐ray diffraction. The addition of glutaraldehyde improved the mechanical properties of the MDF significantly, while it negatively affected the dimensional properties. The MDFs using lignosulfonate/chitosan‐glutaraldehyde adhesives (LS/CS‐Glu) with glutaraldehyde/chitosan mass ratios in the range of 0.25–0.75 fulfilled the Chinese national standard for MDF. Chitosan was crosslinked with self‐polymerized glutaraldehyde through CN linkages which resulted in the reduction of the amide bonds and hydrogen bonds between chitosan and lignosulfonate. The proposed LS/CS‐Glu adhesives can be a promising candidate for traditional MDF adhesives which contain formaldehyde. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45870.

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“…The polymer removed 50, 85, and 98% of dyes (50 mg/L concentration) when 335, 135, and 35 mg/L of the polymer were used for MO, Rb-5, and Ab-113, respectively. The flocculation mechanism was determined to be charge neutralization in this work [ 44 ].…”

Section: Flocculantmentioning

confidence: 99%

Production of Flocculants, Adsorbents, and Dispersants from Lignin

et al. 2018

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Currently, lignin is mainly produced in pulping processes, but it is considered as an under-utilized chemical since it is being mainly used as a fuel source. Lignin contains many hydroxyl groups that can participate in chemical reactions to produce value-added products. Flocculants, adsorbents, and dispersants have a wide range of applications in industry, but they are mainly oil-based chemicals and expensive. This paper reviews the pathways to produce water soluble lignin-based flocculants, adsorbents, and dispersants. It provides information on the recent progress in the possible use of these lignin-based flocculants, adsorbents, and dispersants. It also critically discusses the advantages and disadvantages of various approaches to produce such products. The challenges present in the production of lignin-based flocculants, adsorbents, and dispersants and possible scenarios to overcome these challenges for commercial use of these products in industry are discussed.

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Preparation of lignosulfonate–acrylamide–chitosan ternary graft copolymer and its flocculation performance

Cited by 36 publications

References 34 publications

Production and Application of Lignosulfonates and Sulfonated Lignin

Production and Application of Lignosulfonates and Sulfonated Lignin

Influence of glutaraldehyde on the performance of a lignosulfonate/chitosan‐based medium density fiberboard adhesive

Production of Flocculants, Adsorbents, and Dispersants from Lignin

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