Cellulose Triacetate Synthesis from Cellulosic Wastes by Heterogeneous Reactions
Cellulosic fibers from cotton fibers (CF), recycled writing papers (RWP), recycled newspapers (RN), and macerated woody fibers of Leucaena leucocephala (MWFL) were acetylated by heterogeneous reactions with glacial acetic acid, concentrated H2SO4, and acetic anhydride. The resultant cellulose triace...
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North Carolina State University
2015-06-01
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doaj-056a720465704a229a01f4c01dfda10b2020-11-25T00:53:34ZengNorth Carolina State UniversityBioResources1930-21261930-21262015-06-011035030504810.15376/biores.10.3.5030-5048Cellulose Triacetate Synthesis from Cellulosic Wastes by Heterogeneous ReactionsSherif Shawki Z. Hindi0Refaat A. Abohassan1Associate Professor Fac. of Meteorology, Environment and Arid Land Agric. King Abdullaziz Univ.; Saudi Arabia Department of Arid Land Agriculture, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdullaziz University, P.O. Box 80208, Jeddah 21589, Saudi Arabia; Saudi ArabiaCellulosic fibers from cotton fibers (CF), recycled writing papers (RWP), recycled newspapers (RN), and macerated woody fibers of Leucaena leucocephala (MWFL) were acetylated by heterogeneous reactions with glacial acetic acid, concentrated H2SO4, and acetic anhydride. The resultant cellulose triacetate (CTA) was characterized for yield and solubility as well as by using 1H-NMR spectroscopy and SEM. The acetylated product (AP) yields for CF, RWP, RN, and MWFL were 112, 94, 84, and 73%, respectively. After isolation of pure CTA from the AP, the CTA yields were 87, 80, 68, and 54%. The solubility test for the CTA’s showed a clear solubility in chloroform, as well as mixture of chloroform and methanol (9:1v/v) and vice versa for acetone. The degree of substitution (DS) values for the CTA’s produced were nearly identical and confirmed the presence of CTA. In addition, the pore diameter of the CTA skeleton ranged from 0.072 to 0.239 µm for RWP and RN, and within the dimension scale of the CTA pinholes confirm the synthesis of CTA. Accordingly, pouring of the AP liquor at 25 °C in distilled water at the end of the acetylation and filtration did not hydrolyze the CTA to cellulose diacetate.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_3_5030_Hindi_Cellulose_Triacetate_Synthesis_Cellulosic_WasteDelignificationSolubility testAcetylationCellulose triacetateSEMNMR |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sherif Shawki Z. Hindi Refaat A. Abohassan |
spellingShingle |
Sherif Shawki Z. Hindi Refaat A. Abohassan Cellulose Triacetate Synthesis from Cellulosic Wastes by Heterogeneous Reactions BioResources Delignification Solubility test Acetylation Cellulose triacetate SEM NMR |
author_facet |
Sherif Shawki Z. Hindi Refaat A. Abohassan |
author_sort |
Sherif Shawki Z. Hindi |
title |
Cellulose Triacetate Synthesis from Cellulosic Wastes by Heterogeneous Reactions |
title_short |
Cellulose Triacetate Synthesis from Cellulosic Wastes by Heterogeneous Reactions |
title_full |
Cellulose Triacetate Synthesis from Cellulosic Wastes by Heterogeneous Reactions |
title_fullStr |
Cellulose Triacetate Synthesis from Cellulosic Wastes by Heterogeneous Reactions |
title_full_unstemmed |
Cellulose Triacetate Synthesis from Cellulosic Wastes by Heterogeneous Reactions |
title_sort |
cellulose triacetate synthesis from cellulosic wastes by heterogeneous reactions |
publisher |
North Carolina State University |
series |
BioResources |
issn |
1930-2126 1930-2126 |
publishDate |
2015-06-01 |
description |
Cellulosic fibers from cotton fibers (CF), recycled writing papers (RWP), recycled newspapers (RN), and macerated woody fibers of Leucaena leucocephala (MWFL) were acetylated by heterogeneous reactions with glacial acetic acid, concentrated H2SO4, and acetic anhydride. The resultant cellulose triacetate (CTA) was characterized for yield and solubility as well as by using 1H-NMR spectroscopy and SEM. The acetylated product (AP) yields for CF, RWP, RN, and MWFL were 112, 94, 84, and 73%, respectively. After isolation of pure CTA from the AP, the CTA yields were 87, 80, 68, and 54%. The solubility test for the CTA’s showed a clear solubility in chloroform, as well as mixture of chloroform and methanol (9:1v/v) and vice versa for acetone. The degree of substitution (DS) values for the CTA’s produced were nearly identical and confirmed the presence of CTA. In addition, the pore diameter of the CTA skeleton ranged from 0.072 to 0.239 µm for RWP and RN, and within the dimension scale of the CTA pinholes confirm the synthesis of CTA. Accordingly, pouring of the AP liquor at 25 °C in distilled water at the end of the acetylation and filtration did not hydrolyze the CTA to cellulose diacetate. |
topic |
Delignification Solubility test Acetylation Cellulose triacetate SEM NMR |
url |
http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_3_5030_Hindi_Cellulose_Triacetate_Synthesis_Cellulosic_Waste |
work_keys_str_mv |
AT sherifshawkizhindi cellulosetriacetatesynthesisfromcellulosicwastesbyheterogeneousreactions AT refaataabohassan cellulosetriacetatesynthesisfromcellulosicwastesbyheterogeneousreactions |
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