Preparation of chitosan modified talc and its application in high filler content paper

Chitosan (CS) with different viscosity was investigated as a modifier of talc which was used to improve the strength properties and filler retention in high filler content papers. The particle size and morphology of the resulting modified talc were studied to confirm the successful modification. The...

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Published in: Journal of applied polymer science Vol. 129; no. 5; pp. 2692 - 2698
Main Authors: Yu, Yang, Xue, Guoxin, Gu, Chunhong, Lou, Jipan, Li, Shizhen
Format: Journal Article
Language: English
Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 09-05-2013
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Summary: Chitosan (CS) with different viscosity was investigated as a modifier of talc which was used to improve the strength properties and filler retention in high filler content papers. The particle size and morphology of the resulting modified talc were studied to confirm the successful modification. The zeta potential and coating amount of the CS modified talc were also investigated. It was found that CS viscosity was a critical factor for the filler modification and final paper properties. When high viscosity CS was applied, the resulting tensile strength of filled paper was 64% higher than that of unmodified talc at the filler content of 37% as well as maintained favorable optical properties. Furthermore, with the filler loading of 70% (based on the solid fiber weight), compared with that of unmodified talc, filler retention of modified talc was increased by 39%, while the drainage was little influenced. The field emission scanning electron microscopy images showed a better bonding capacity between modified talc and fibers than that of untreated talc. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
ISSN: 0021-8995
1097-4628
DOI: 10.1002/app.38992