Cellulose Fibers Dissolution in Alkaline Solution

In this study, NaOH dissolution method was applied to dissolve cellulose fibers which extracted from date palm fronds (type Al-Zahdi) taken from Iraqi gardens. In this process, (NaOH)-solution is brought into contact with the cellulose fibers at low temperature. Experiments were conducted with diff...

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Autores principales:	Yasmeen Salih Mahdi, Asem Hassan Mohammed, Alaa Kareem Mohammed
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2019
Materias:	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/320e3a4c4ced48a2b3b19bae23fb2772
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spelling	oai:doaj.org-article:320e3a4c4ced48a2b3b19bae23fb27722021-12-02T02:33:57ZCellulose Fibers Dissolution in Alkaline Solution10.22153/kej.2018.11.0051818-11712312-0789https://doaj.org/article/320e3a4c4ced48a2b3b19bae23fb27722019-03-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/395https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 In this study, NaOH dissolution method was applied to dissolve cellulose fibers which extracted from date palm fronds (type Al-Zahdi) taken from Iraqi gardens. In this process, (NaOH)-solution is brought into contact with the cellulose fibers at low temperature. Experiments were conducted with different concentrations of NaOH (4%, 6%, 8% and12%) weight percent at two cooling bath temperatures (-15 oC) and (-20oC). Maximum cellulose dissolution was 23 wt% which obtained at 8 wt% concentration of NaOH and at cooling bath temperature of -20oC. In order to enhance the cellulose fibers dissolution, the sample was pretreated with Fenton's reagent which consists of hydrogen peroxide (H2O2), oxalic acid (C2H2O4) and ferrous sulfate (FeSO4). This reagent reacts with cellulose fibers and produces free radicals which increase cellulose dissolution. In this work three variables were studied: cooling bath temperature (-15oCand-20oC), NaOH concentration (4%, 6%, 8% and12%) and time of Fenton's reagent treatment (1-48) hrs. The results showed that the best percent of cellulose dissolution was (42 wt %) which occurred at treatment time (24 hours), temperature (-20oC) and NaOH concentration 8%. In another set of experiments urea was added to NaOH solution as a catalyst with proportion (6%NaOH+4% urea) at two temperatures -15 and -20 oC. The results show that the solubility of cellulose increase to 62% for the sample which treated with Fenton's reagent and to 35% for the untreated sample, both values were obtained at -15oC. Yasmeen Salih MahdiAsem Hassan MohammedAlaa Kareem MohammedAl-Khwarizmi College of Engineering – University of BaghdadarticleChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 14, Iss 2 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Yasmeen Salih Mahdi Asem Hassan Mohammed Alaa Kareem Mohammed Cellulose Fibers Dissolution in Alkaline Solution
description	In this study, NaOH dissolution method was applied to dissolve cellulose fibers which extracted from date palm fronds (type Al-Zahdi) taken from Iraqi gardens. In this process, (NaOH)-solution is brought into contact with the cellulose fibers at low temperature. Experiments were conducted with different concentrations of NaOH (4%, 6%, 8% and12%) weight percent at two cooling bath temperatures (-15 oC) and (-20oC). Maximum cellulose dissolution was 23 wt% which obtained at 8 wt% concentration of NaOH and at cooling bath temperature of -20oC. In order to enhance the cellulose fibers dissolution, the sample was pretreated with Fenton's reagent which consists of hydrogen peroxide (H2O2), oxalic acid (C2H2O4) and ferrous sulfate (FeSO4). This reagent reacts with cellulose fibers and produces free radicals which increase cellulose dissolution. In this work three variables were studied: cooling bath temperature (-15oCand-20oC), NaOH concentration (4%, 6%, 8% and12%) and time of Fenton's reagent treatment (1-48) hrs. The results showed that the best percent of cellulose dissolution was (42 wt %) which occurred at treatment time (24 hours), temperature (-20oC) and NaOH concentration 8%. In another set of experiments urea was added to NaOH solution as a catalyst with proportion (6%NaOH+4% urea) at two temperatures -15 and -20 oC. The results show that the solubility of cellulose increase to 62% for the sample which treated with Fenton's reagent and to 35% for the untreated sample, both values were obtained at -15oC.
format	article
author	Yasmeen Salih Mahdi Asem Hassan Mohammed Alaa Kareem Mohammed
author_facet	Yasmeen Salih Mahdi Asem Hassan Mohammed Alaa Kareem Mohammed
author_sort	Yasmeen Salih Mahdi
title	Cellulose Fibers Dissolution in Alkaline Solution
title_short	Cellulose Fibers Dissolution in Alkaline Solution
title_full	Cellulose Fibers Dissolution in Alkaline Solution
title_fullStr	Cellulose Fibers Dissolution in Alkaline Solution
title_full_unstemmed	Cellulose Fibers Dissolution in Alkaline Solution
title_sort	cellulose fibers dissolution in alkaline solution
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2019
url	https://doaj.org/article/320e3a4c4ced48a2b3b19bae23fb2772
work_keys_str_mv	AT yasmeensalihmahdi cellulosefibersdissolutioninalkalinesolution AT asemhassanmohammed cellulosefibersdissolutioninalkalinesolution AT alaakareemmohammed cellulosefibersdissolutioninalkalinesolution
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Cellulose Fibers Dissolution in Alkaline Solution

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