Iranian Researchers Make Paper From Soda Bagasse Pulp

Wednesday, June 27, 2018 - 13:47

Iranian researchers have investigated the effects of cationic starch in the presence of cellulose nanofibrils on structural, optical and strength properties of paper from soda bagasse pulp.

According to an ISCA report, paper is some material manufactured in thin sheets from the pulp of wood or other fibrous substances and based on the statistics, it takes 20-80 years for each tree cut down to make paper to be replaced with a new tree that has grown to maturity.

One of the researchers, Milad Tajik, has explained that using bagasse in paper industry would stop any tree cutting, so in this research project, cellulose nanofibres were used to optimize the properties of produced papers.

The research investigated the effects of widely available bio-based additives, cellulose nanofibrils (CNFs) in combination with high degree of substitution cationic starch (CS) on the structural, optical and strength properties of hand sheet paper made from soda bagasse pulp.

Obtained results indicated that both the type and loading level of the additives had meaningful effects (99% confidence level) on the evaluated properties. Scanning electron microscope (SEM) images showed the retention and reinforcing effects of the additives on the paper network.

Tensile and burst strengths increased continuously with increasing levels of the bio-additives up to 33% and 23% (0.6 CS/2% CNFs), respectively. However, the cellulose nanofibrils improved retention and drainage of the pulp at the lower levels (0.5 CS/0.1 CNFs), presumably due to complex interaction between CNFs and CS. Moreover, for the handsheet papers made of semi-bleached soda bagasse pulp, higher addition of CNFs improved the brightness of paper.

The research was carried out by MiladTajik, graduate student and Hossein Jalali Torshizi, faculty member of Department of Cellulose and Paper Technology, New Technologies Engineering Faculty, Shahid Beheshti University, Dr. Hossein Resalati, Department of Wood and Paper Science & Technology, faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources and Yahya Hamzeh, department of Wood and Paper Science & Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran.

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