INFLUENCE OF CELLULOSE POLYMERIZATION DEGREE AND CRYSTALLINITY ON KINETICS OF CELLULOSE DEGRADATION
Cellulose was treated in ethylene glycol with p-toluene sulfonic acid monohydrate as a catalyst at different temperatures. At the highest treatment temperature (150 °C) liquefaction of wood pulp cellulose was achieved and was dependant on cellulose polymerization degree (DP). Furthermore, the rate o...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2012-05-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_3_3008_JasiukaityteG_KP_Cellulose_Polymerization_Crystallinity_Degradation/1564 |
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| author | Edita Jasiukaitytė-Grojzdek, Matjaž Kunaver, Ida Poljanšek |
| author_facet | Edita Jasiukaitytė-Grojzdek, Matjaž Kunaver, Ida Poljanšek |
| author_sort | Edita Jasiukaitytė-Grojzdek, |
| collection | DOAJ |
| description | Cellulose was treated in ethylene glycol with p-toluene sulfonic acid monohydrate as a catalyst at different temperatures. At the highest treatment temperature (150 °C) liquefaction of wood pulp cellulose was achieved and was dependant on cellulose polymerization degree (DP). Furthermore, the rate of amorphous cellulose weight loss was found to increase with cellulose degree of polymerization, while the rate of crystalline cellulose weight loss was reciprocal to the size of the crystallites. The cellulose degradation was studied by monitoring of the molecular mass decrease by size-exclusion chromatography. It was revealed that microcrystalline cellulose degrades via a ‘quantum mode’ mechanism, while the degradation of Whatman filter paper no 1. and cotton linters proceeded randomly and were partly dependent on the starting polymerization degree, crystallinity, and treatment temperature. The kinetics of cellulose degradation in heterogeneous media was described by means of a one-stage model, characterised by the consumption of glycosidic bonds in amorphous and crystalline cellulose regions until the levelling-off degree of polymerization is reached. |
| first_indexed | 2024-12-21T22:07:33Z |
| format | Article |
| id | doaj.art-dedd802971ab4bc691f7c9fb9047a6a4 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 |
| language | English |
| last_indexed | 2024-12-21T22:07:33Z |
| publishDate | 2012-05-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-dedd802971ab4bc691f7c9fb9047a6a42022-12-21T18:48:41ZengNorth Carolina State UniversityBioResources1930-21262012-05-017330083027INFLUENCE OF CELLULOSE POLYMERIZATION DEGREE AND CRYSTALLINITY ON KINETICS OF CELLULOSE DEGRADATIONEdita Jasiukaitytė-Grojzdek,Matjaž Kunaver,Ida PoljanšekCellulose was treated in ethylene glycol with p-toluene sulfonic acid monohydrate as a catalyst at different temperatures. At the highest treatment temperature (150 °C) liquefaction of wood pulp cellulose was achieved and was dependant on cellulose polymerization degree (DP). Furthermore, the rate of amorphous cellulose weight loss was found to increase with cellulose degree of polymerization, while the rate of crystalline cellulose weight loss was reciprocal to the size of the crystallites. The cellulose degradation was studied by monitoring of the molecular mass decrease by size-exclusion chromatography. It was revealed that microcrystalline cellulose degrades via a ‘quantum mode’ mechanism, while the degradation of Whatman filter paper no 1. and cotton linters proceeded randomly and were partly dependent on the starting polymerization degree, crystallinity, and treatment temperature. The kinetics of cellulose degradation in heterogeneous media was described by means of a one-stage model, characterised by the consumption of glycosidic bonds in amorphous and crystalline cellulose regions until the levelling-off degree of polymerization is reached.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_3_3008_JasiukaityteG_KP_Cellulose_Polymerization_Crystallinity_Degradation/1564CelluloseAcid-catalyzed degradation‘Quantum mode’ mechanismEthylene glycolp-Toluene sulfonic acid monohydrateKinetics |
| spellingShingle | Edita Jasiukaitytė-Grojzdek, Matjaž Kunaver, Ida Poljanšek INFLUENCE OF CELLULOSE POLYMERIZATION DEGREE AND CRYSTALLINITY ON KINETICS OF CELLULOSE DEGRADATION BioResources Cellulose Acid-catalyzed degradation ‘Quantum mode’ mechanism Ethylene glycol p-Toluene sulfonic acid monohydrate Kinetics |
| title | INFLUENCE OF CELLULOSE POLYMERIZATION DEGREE AND CRYSTALLINITY ON KINETICS OF CELLULOSE DEGRADATION |
| title_full | INFLUENCE OF CELLULOSE POLYMERIZATION DEGREE AND CRYSTALLINITY ON KINETICS OF CELLULOSE DEGRADATION |
| title_fullStr | INFLUENCE OF CELLULOSE POLYMERIZATION DEGREE AND CRYSTALLINITY ON KINETICS OF CELLULOSE DEGRADATION |
| title_full_unstemmed | INFLUENCE OF CELLULOSE POLYMERIZATION DEGREE AND CRYSTALLINITY ON KINETICS OF CELLULOSE DEGRADATION |
| title_short | INFLUENCE OF CELLULOSE POLYMERIZATION DEGREE AND CRYSTALLINITY ON KINETICS OF CELLULOSE DEGRADATION |
| title_sort | influence of cellulose polymerization degree and crystallinity on kinetics of cellulose degradation |
| topic | Cellulose Acid-catalyzed degradation ‘Quantum mode’ mechanism Ethylene glycol p-Toluene sulfonic acid monohydrate Kinetics |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_3_3008_JasiukaityteG_KP_Cellulose_Polymerization_Crystallinity_Degradation/1564 |
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