Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted Bagasse
This study focused on the properties of alkaline pulp obtained from the soda pulping of pre-extracted bagasse and the effects of dry strength polymers on mechanical properties of paper in comparison to a paper obtained from nonextracted bagasse. Hot-water pre-extraction was carried out at 135°C for...
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| Format: | Article |
| Language: | fas |
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Iran Polymer and Petrochemical Institute
2013-01-01
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| Series: | علوم و تکنولوژی پلیمر |
| Subjects: | |
| Online Access: | http://jips.ippi.ac.ir/article_622_bb5d243326f0f6c4574e0dde42bd8fcf.pdf |
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| author | Zeinab Khorasani Yahya Hamzeh Alireza Ashori Mohammad Azadfallah |
| author_facet | Zeinab Khorasani Yahya Hamzeh Alireza Ashori Mohammad Azadfallah |
| author_sort | Zeinab Khorasani |
| collection | DOAJ |
| description | This study focused on the properties of alkaline pulp obtained from the soda pulping of pre-extracted bagasse and the effects of dry strength polymers on mechanical properties of paper in comparison to a paper obtained from nonextracted bagasse. Hot-water pre-extraction was carried out at 135°C for 30 min. Consequently, soda pulping and ECF bleaching were performed on pre-extracted and un-extracted bagasse, under similar conditions. It was found that pre-extraction of about 50% of hemicelloluse of the bagasse decreased total pulping yield, kappa number and increased bleachability of pulps and resulted in a significant loss in tensile and burst strengths of hand-sheets. Then, reinforcing effect of the pulps with chitosan and cationic starch applied in the wet-end were investigated. The results obtained with suitable amounts of chitosan and cationic starch were encouraging, because comparable strengths were obtained from pre-extracted and un-extracted bleached soda bagasse pulps with 1% chitosan and 1.5% cationic starch. According to the results, drop in paper strength due to hemicellulose pre-extraction of the bagasse could be compensated using suitable dry strength polymer. E Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted Bagasse Zeinab Khorasani 1, Yahya Hamzeh1*, Alireza Ashori2, and Mohammad Azadfallah 1 1. Faculty of Natural Resources, Department of Wood and Paper Sciences and Technology, University of Tehran, P.O. Box: 31585-4314, Karaj, Iran 2. Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), P.O. Box: 15815-3538, Tehran, Iran Received 2 April 2012, accepted 17 December 2012 |
| first_indexed | 2024-12-22T03:49:06Z |
| format | Article |
| id | doaj.art-c360a59896124c96af507e716b1c74a6 |
| institution | Directory Open Access Journal |
| issn | 1016-3255 2008-0883 |
| language | fas |
| last_indexed | 2024-12-22T03:49:06Z |
| publishDate | 2013-01-01 |
| publisher | Iran Polymer and Petrochemical Institute |
| record_format | Article |
| series | علوم و تکنولوژی پلیمر |
| spelling | doaj.art-c360a59896124c96af507e716b1c74a62022-12-21T18:40:03ZfasIran Polymer and Petrochemical Instituteعلوم و تکنولوژی پلیمر1016-32552008-08832013-01-0125538339210.22063/jipst.2013.622622Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted BagasseZeinab Khorasani0Yahya Hamzeh1Alireza Ashori2Mohammad Azadfallah3Faculty of Natural Resources, University of Tehran,Faculty of Natural Resources, University of Tehran,Iranian Research Organization for Science and TechnologyFaculty of Natural Resources, University of Tehran,This study focused on the properties of alkaline pulp obtained from the soda pulping of pre-extracted bagasse and the effects of dry strength polymers on mechanical properties of paper in comparison to a paper obtained from nonextracted bagasse. Hot-water pre-extraction was carried out at 135°C for 30 min. Consequently, soda pulping and ECF bleaching were performed on pre-extracted and un-extracted bagasse, under similar conditions. It was found that pre-extraction of about 50% of hemicelloluse of the bagasse decreased total pulping yield, kappa number and increased bleachability of pulps and resulted in a significant loss in tensile and burst strengths of hand-sheets. Then, reinforcing effect of the pulps with chitosan and cationic starch applied in the wet-end were investigated. The results obtained with suitable amounts of chitosan and cationic starch were encouraging, because comparable strengths were obtained from pre-extracted and un-extracted bleached soda bagasse pulps with 1% chitosan and 1.5% cationic starch. According to the results, drop in paper strength due to hemicellulose pre-extraction of the bagasse could be compensated using suitable dry strength polymer. E Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted Bagasse Zeinab Khorasani 1, Yahya Hamzeh1*, Alireza Ashori2, and Mohammad Azadfallah 1 1. Faculty of Natural Resources, Department of Wood and Paper Sciences and Technology, University of Tehran, P.O. Box: 31585-4314, Karaj, Iran 2. Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), P.O. Box: 15815-3538, Tehran, Iran Received 2 April 2012, accepted 17 December 2012http://jips.ippi.ac.ir/article_622_bb5d243326f0f6c4574e0dde42bd8fcf.pdfbagassesoda pulpingdry strength polymerscationic starchchitosan |
| spellingShingle | Zeinab Khorasani Yahya Hamzeh Alireza Ashori Mohammad Azadfallah Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted Bagasse علوم و تکنولوژی پلیمر bagasse soda pulping dry strength polymers cationic starch chitosan |
| title | Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted Bagasse |
| title_full | Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted Bagasse |
| title_fullStr | Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted Bagasse |
| title_full_unstemmed | Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted Bagasse |
| title_short | Effect of Cationic Starch and Chitosan on Dry Strength of Bleached Soda Pulps Made of Pre-Extracted and Non-Extracted Bagasse |
| title_sort | effect of cationic starch and chitosan on dry strength of bleached soda pulps made of pre extracted and non extracted bagasse |
| topic | bagasse soda pulping dry strength polymers cationic starch chitosan |
| url | http://jips.ippi.ac.ir/article_622_bb5d243326f0f6c4574e0dde42bd8fcf.pdf |
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