Sorghum straw: Pulping and bleaching process optimization and synthesis of cellulose acetate
The process employed for the pulping and bleaching of sorghum straw was optimized prior to the synthesis of cellulose acetate. A 22 factorial central composite design was carried out. The variables considered were cooking time (1.5 to 2.5 h) and dilute alkali concentration (0.75 to 1.25%) for the pu...
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| Veröffentlicht in: | International journal of biological macromolecules 2019-08, Vol.135, p.877-886 |
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| creator | Andrade Alves, Jéssica A. Lisboa dos Santos, Matheus D. Morais, Cleiber Cintra Ramirez Ascheri, José L. Signini, Roberta dos Santos, Danilo Martins Cavalcante Bastos, Suely M. Ramirez Ascheri, Diego P. |
| description | The process employed for the pulping and bleaching of sorghum straw was optimized prior to the synthesis of cellulose acetate. A 22 factorial central composite design was carried out. The variables considered were cooking time (1.5 to 2.5 h) and dilute alkali concentration (0.75 to 1.25%) for the pulping and bleaching time (30 to 35 min) and bleach volume (20 to 25 mL) for the bleaching. The sorghum straw was comprised of 49.43% α-cellulose, 19.18% hemicellulose and 30.42% lignin. The optimum conditions that maximize these processes were 2.5 h and 1.25% (dilute alkali concentration) at 90 °C, and 35 min and 25 mL (bleach volume) at 80 °C, respectively, providing pulps with a low Kappa number ( |
| doi_str_mv | 10.1016/j.ijbiomac.2019.05.014 |
| format | Article |
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•Sorghum straw can be used as a raw material to produce pulps and cellulose derivatives.•Sorghum straw does not require sophisticated pretreatment to remove the lignin.•The bleaching process yields high-quality sorghum straw cellulose.•Cellulose acetate synthesis provides a high added-value product from sorghum straw.</description><identifier>ISSN: 0141-8130</identifier><identifier>EISSN: 1879-0003</identifier><identifier>DOI: 10.1016/j.ijbiomac.2019.05.014</identifier><identifier>PMID: 31152840</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Cellulose - analogs & derivatives ; Cellulose - chemical synthesis ; Cellulose - chemistry ; Chemical Phenomena ; Chemistry Techniques, Synthetic ; Desirability function ; FTIR spectroscopy ; Molecular Weight ; Response surface methodology ; SEM ; Sorghum - chemistry ; Sorghum bicolor ; Thermal analysis ; Waste Products ; XRD</subject><ispartof>International journal of biological macromolecules, 2019-08, Vol.135, p.877-886</ispartof><rights>2019 Elsevier B.V.</rights><rights>Copyright © 2019 Elsevier B.V. All rights reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c416t-9b2c2d164b02cc31cebaaa0a2ea615e6f2a908dbdcb5043da316120aaa5dece13</citedby><cites>FETCH-LOGICAL-c416t-9b2c2d164b02cc31cebaaa0a2ea615e6f2a908dbdcb5043da316120aaa5dece13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0141813019325401$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/31152840$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Andrade Alves, Jéssica A.</creatorcontrib><creatorcontrib>Lisboa dos Santos, Matheus D.</creatorcontrib><creatorcontrib>Morais, Cleiber Cintra</creatorcontrib><creatorcontrib>Ramirez Ascheri, José L.</creatorcontrib><creatorcontrib>Signini, Roberta</creatorcontrib><creatorcontrib>dos Santos, Danilo Martins</creatorcontrib><creatorcontrib>Cavalcante Bastos, Suely M.</creatorcontrib><creatorcontrib>Ramirez Ascheri, Diego P.</creatorcontrib><title>Sorghum straw: Pulping and bleaching process optimization and synthesis of cellulose acetate</title><title>International journal of biological macromolecules</title><addtitle>Int J Biol Macromol</addtitle><description>The process employed for the pulping and bleaching of sorghum straw was optimized prior to the synthesis of cellulose acetate. A 22 factorial central composite design was carried out. The variables considered were cooking time (1.5 to 2.5 h) and dilute alkali concentration (0.75 to 1.25%) for the pulping and bleaching time (30 to 35 min) and bleach volume (20 to 25 mL) for the bleaching. The sorghum straw was comprised of 49.43% α-cellulose, 19.18% hemicellulose and 30.42% lignin. The optimum conditions that maximize these processes were 2.5 h and 1.25% (dilute alkali concentration) at 90 °C, and 35 min and 25 mL (bleach volume) at 80 °C, respectively, providing pulps with a low Kappa number (<3) and lignin content, and cellulose with a high degree of crystallinity. The 1H NMR, XRD, FTIR spectroscopy, SEM and thermal analysis demonstrated that it is possible to synthetize cellulose acetate (with 2.62 degrees of substitution) by acetylating bleached pulp for 16 h at 25 °C.
•Sorghum straw can be used as a raw material to produce pulps and cellulose derivatives.•Sorghum straw does not require sophisticated pretreatment to remove the lignin.•The bleaching process yields high-quality sorghum straw cellulose.•Cellulose acetate synthesis provides a high added-value product from sorghum straw.</description><subject>Cellulose - analogs & derivatives</subject><subject>Cellulose - chemical synthesis</subject><subject>Cellulose - chemistry</subject><subject>Chemical Phenomena</subject><subject>Chemistry Techniques, Synthetic</subject><subject>Desirability function</subject><subject>FTIR spectroscopy</subject><subject>Molecular Weight</subject><subject>Response surface methodology</subject><subject>SEM</subject><subject>Sorghum - chemistry</subject><subject>Sorghum bicolor</subject><subject>Thermal analysis</subject><subject>Waste Products</subject><subject>XRD</subject><issn>0141-8130</issn><issn>1879-0003</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkE2P1DAMQCMEYmcX_sKqRy4tdtKGlhNoxZe0EkjADSlyE89ORm0zJOmi5deTYXa5copsP8f2E-ISoUFA_XLf-P3ow0y2kYBDA10D2D4SG-xfDTUAqMdiUzJY96jgTJyntC9Z3WH_VJwpxE72LWzEj68h3uzWuUo50q_X1Zd1OvjlpqLFVePEZHfH6BCD5ZSqcMh-9r8p-7D8RdLdknecfCltK8vTtE4hcUWWM2V-Jp5saUr8_P69EN_fv_t29bG-_vzh09Xb69q2qHM9jNJKh7odQVqr0PJIRECSSWPHeitpgN6Nzo4dtMqRQo0SCtM5tozqQrw4_Vv2_Llyymb26bgNLRzWZKRUqteqk0NB9Qm1MaQUeWsO0c8U7wyCOZo1e_Ng1hzNGuhM8VgaL-9nrOPM7l_bg8oCvDkBXC699RxNsp4Xy85Httm44P834w86kI-5</recordid><startdate>20190815</startdate><enddate>20190815</enddate><creator>Andrade Alves, Jéssica A.</creator><creator>Lisboa dos Santos, Matheus D.</creator><creator>Morais, Cleiber Cintra</creator><creator>Ramirez Ascheri, José L.</creator><creator>Signini, Roberta</creator><creator>dos Santos, Danilo Martins</creator><creator>Cavalcante Bastos, Suely M.</creator><creator>Ramirez Ascheri, Diego P.</creator><general>Elsevier B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20190815</creationdate><title>Sorghum straw: Pulping and bleaching process optimization and synthesis of cellulose acetate</title><author>Andrade Alves, Jéssica A. ; Lisboa dos Santos, Matheus D. ; Morais, Cleiber Cintra ; Ramirez Ascheri, José L. ; Signini, Roberta ; dos Santos, Danilo Martins ; Cavalcante Bastos, Suely M. ; Ramirez Ascheri, Diego P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c416t-9b2c2d164b02cc31cebaaa0a2ea615e6f2a908dbdcb5043da316120aaa5dece13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Cellulose - analogs & derivatives</topic><topic>Cellulose - chemical synthesis</topic><topic>Cellulose - chemistry</topic><topic>Chemical Phenomena</topic><topic>Chemistry Techniques, Synthetic</topic><topic>Desirability function</topic><topic>FTIR spectroscopy</topic><topic>Molecular Weight</topic><topic>Response surface methodology</topic><topic>SEM</topic><topic>Sorghum - chemistry</topic><topic>Sorghum bicolor</topic><topic>Thermal analysis</topic><topic>Waste Products</topic><topic>XRD</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Andrade Alves, Jéssica A.</creatorcontrib><creatorcontrib>Lisboa dos Santos, Matheus D.</creatorcontrib><creatorcontrib>Morais, Cleiber Cintra</creatorcontrib><creatorcontrib>Ramirez Ascheri, José L.</creatorcontrib><creatorcontrib>Signini, Roberta</creatorcontrib><creatorcontrib>dos Santos, Danilo Martins</creatorcontrib><creatorcontrib>Cavalcante Bastos, Suely M.</creatorcontrib><creatorcontrib>Ramirez Ascheri, Diego P.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>International journal of biological macromolecules</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Andrade Alves, Jéssica A.</au><au>Lisboa dos Santos, Matheus D.</au><au>Morais, Cleiber Cintra</au><au>Ramirez Ascheri, José L.</au><au>Signini, Roberta</au><au>dos Santos, Danilo Martins</au><au>Cavalcante Bastos, Suely M.</au><au>Ramirez Ascheri, Diego P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sorghum straw: Pulping and bleaching process optimization and synthesis of cellulose acetate</atitle><jtitle>International journal of biological macromolecules</jtitle><addtitle>Int J Biol Macromol</addtitle><date>2019-08-15</date><risdate>2019</risdate><volume>135</volume><spage>877</spage><epage>886</epage><pages>877-886</pages><issn>0141-8130</issn><eissn>1879-0003</eissn><abstract>The process employed for the pulping and bleaching of sorghum straw was optimized prior to the synthesis of cellulose acetate. A 22 factorial central composite design was carried out. The variables considered were cooking time (1.5 to 2.5 h) and dilute alkali concentration (0.75 to 1.25%) for the pulping and bleaching time (30 to 35 min) and bleach volume (20 to 25 mL) for the bleaching. The sorghum straw was comprised of 49.43% α-cellulose, 19.18% hemicellulose and 30.42% lignin. The optimum conditions that maximize these processes were 2.5 h and 1.25% (dilute alkali concentration) at 90 °C, and 35 min and 25 mL (bleach volume) at 80 °C, respectively, providing pulps with a low Kappa number (<3) and lignin content, and cellulose with a high degree of crystallinity. The 1H NMR, XRD, FTIR spectroscopy, SEM and thermal analysis demonstrated that it is possible to synthetize cellulose acetate (with 2.62 degrees of substitution) by acetylating bleached pulp for 16 h at 25 °C.
•Sorghum straw can be used as a raw material to produce pulps and cellulose derivatives.•Sorghum straw does not require sophisticated pretreatment to remove the lignin.•The bleaching process yields high-quality sorghum straw cellulose.•Cellulose acetate synthesis provides a high added-value product from sorghum straw.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>31152840</pmid><doi>10.1016/j.ijbiomac.2019.05.014</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Cellulose - analogs & derivatives Cellulose - chemical synthesis Cellulose - chemistry Chemical Phenomena Chemistry Techniques, Synthetic Desirability function FTIR spectroscopy Molecular Weight Response surface methodology SEM Sorghum - chemistry Sorghum bicolor Thermal analysis Waste Products XRD |
| title | Sorghum straw: Pulping and bleaching process optimization and synthesis of cellulose acetate |
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