Depended pH behavior of chitosan on surface modified fibers of Kraft pulp

Nazarnezhad, Noraldin; Rasol Pour Hedayati, Naser; Ramazani, Omid

doi:10.22092/ijwpr.2015.101474

Document Type : Research Paper

Authors

¹ Associate Prof, Wood and Paper Department, Agricultural and Natural Resources University, Sari, Iran

² M.Sc., of pulp and paper industry. Agricultural and Natural Resources University, Sari, Iran

³ Assistant Prof, Cellulose and Paper Technology Department, Shahid Beheshti University, Ziraab, savadkooh, Iran

https://doi.org/10.22092/ijwpr.2015.101474

Abstract

Chitosan is known as a natural polymer which improves strengths of papers. So, in this study investigated improvement of chitosan absorption on modified craft fibers and increase its efficiency. The effects of chitosan were experimented in three levels of 0%, 0.75% and 1.25% on modified kraft fibers surfaces with 3% hydrogen peroxide in different pH levels (5.5, 7 and 8.5). The results showed that chitosan had better performance at low dosages and alkaline conditions. Also surface fibers modification by hydrogen peroxide caused increase of carboxyl groups and fibers anionic charge. Fibers anionic charge with participant of chitosan formed a dual system. The apparent density increased from acidic pH to alkaline. As, the highest apparent density were reached in alkaline pH and 0.75 % of chitosan. Also, tensile index and burst index of paper were reached in alkaline pH and 0.75 % of chitosan. Whereas, chitosan and the surface modified fibers of kraft pulp did not have a significant level on the tear index

Keywords

Main Subjects

Pulp and paper

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Iranian Journal of Wood and Paper Science Research

Depended pH behavior of chitosan on surface modified fibers of Kraft pulp

References

References

Volume 30, Fall 3 - Serial Number 52
August 2015
Pages 513-524

Depended pH behavior of chitosan on surface modified fibers of Kraft pulp

References

References

Volume 30, Fall 3 - Serial Number 52August 2015Pages 513-524

Volume 30, Fall 3 - Serial Number 52
August 2015
Pages 513-524