Investigation on adsorption, configuration and performance of chitosan polyelectrolyte in pulp slurry by ellipsometry technique

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RAMEZANI N.; KHOSRAVANI A.; RUDI H.R.

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Journal: Iranian Journal of Wood and Paper Science Research Year:2020 | Volume:34 | Issue:4 (69) Page(s): 535-546

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Information Journal Paper

Title

Investigation on adsorption, configuration and performance of chitosan polyelectrolyte in pulp slurry by ellipsometry technique

Author(s)

RAMEZANI N. | KHOSRAVANI A. | RUDI H.R. | Issue Writer Certificate

Keywords

EllipsometryQ1

polyelectrolyteQ1

chitosanQ1

colloidQ1

adsorptionQ1

Abstract

chitosan is one of the biopolymers which possesses unique properties and has been recently considered in various applications such as paper-making. This polymer is soluble in acidic conditions and has the potential to act as a polyelectrolyte under the colloidal condition in the pulp. However, according to the studies, the capability of this polyelectrolyte was better in alkaline condition, in improving the drainage, retention and even strength properties of paper. Therefore, in this study, the performance of chitosan was studied in different conditions and the results were investigated based on the interpretation of the adsorption process and chitosan configuration using silicon wafer model and Ellipsometry technique. For this purpose, bleached kraft softwood fibers were refined to a Canadian Standard Freeness of 300 ml and after addition of chitosan and nano-silica at different pH levels, freeness and fines retention parameters were evaluated. The results of this study confirmed that chitosan polyelectrolyte showed a good performance in increasing drainage and retention at alkaline pH, compared to the other pH levels, alone and with the addition of nano silica. However, in freeness test at acidic pH, the addition of chitosan combined with nanosilica reduced the drainage, and no significant effect was observed at neutral and acidic pH in the case of fine retentions. In order to interpret these observations and to ratiocinate the behavior of chitosan polyelectrolyte, the data obtained from the Ellipsometry technique was studied to determine the configuration and the thickness of the adsorbed chitosan layer. This technique showed higher thickness layer of the polymeric adsorbed at alkaline pH, and thus, the possibility of the longer tail and loops configurations in the environment and more effective interactions beyond the electrical double layer.

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APA: Copy

RAMEZANI, N., KHOSRAVANI, A., & RUDI, H.R.. (2020). Investigation on adsorption, configuration and performance of chitosan polyelectrolyte in pulp slurry by ellipsometry technique. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, 34(4 (69) ), 535-546. SID. https://sid.ir/paper/396605/en

Vancouver: Copy

RAMEZANI N., KHOSRAVANI A., RUDI H.R.. Investigation on adsorption, configuration and performance of chitosan polyelectrolyte in pulp slurry by ellipsometry technique. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH[Internet]. 2020;34(4 (69) ):535-546. Available from: https://sid.ir/paper/396605/en

IEEE: Copy

N. RAMEZANI, A. KHOSRAVANI, and H.R. RUDI, “Investigation on adsorption, configuration and performance of chitosan polyelectrolyte in pulp slurry by ellipsometry technique,” IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, vol. 34, no. 4 (69) , pp. 535–546, 2020, [Online]. Available: https://sid.ir/paper/396605/en

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