<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822022000200167</article-id>
<article-id pub-id-type="doi">10.18845/tm.v35i2.5609</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Obtención de nanocelulosa a partir de raquis de palma africana y bagazo de caña]]></article-title>
<article-title xml:lang="en"><![CDATA[Nanocellulose production from African oil palm rachis and sugarcane bagasse]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jirón-García]]></surname>
<given-names><![CDATA[Eddy Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Mora]]></surname>
<given-names><![CDATA[Karina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bernal-Samaniego]]></surname>
<given-names><![CDATA[Cesar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Sede del Caribe ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Unidad de Recursos Forestales Instituto de Investigaciones en Ingeniería]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Costa Rica Sede del Caribe ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>35</volume>
<numero>2</numero>
<fpage>167</fpage>
<lpage>181</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822022000200167&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822022000200167&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822022000200167&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se utilizó raquis de palma africana y bagazo de caña como materias primas para obtener nanofibrillas de celulosa por medio de un método híbrido combinando un tratamiento químico y una ruptura mecánica. La celulosa obtenida de ambas materias primas, luego de la hidrólisis fue caracterizada por Espectroscopía Infrarroja, Análisis Termogravimétrico, Microscopía Electrónica de Barrido, Microscopía de Fluorescencia y Difracción de rayos X. Se realizó una Microscopía Electrónica de Transmisión a las nanofibrillas para determinar el tamaño de las mismas. Se observó un porcentaje de remoción de lignina de 74,1 % para el raquis de palma africana y de 65,6 % para el bagazo de caña luego del tratamiento químico; lo que generó microcelulosa de 6-12 µm y de 10-18 µm para el raquis y el bagazo respectivamente. La ruptura mecánica con el sonificador de alta potencia produjo nanofibrillas de 19-24 nm para el raquis de palma y de 9,22-12 nm para el bagazo de caña; con un Índice de Cristalinidad de 70% en ambos casos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract African oil palm rachis and sugarcane bagasse were used as raw materials to produce cellulose nanofibrils by hybrid method which combine chemical treatment and mechanical rupture. The cellulose obtained from both raw materials after hydrolysis was characterized by Infrared Spectroscopy, Thermogravimetric Degradation Analysis, Scanning Electron Microscopy, Fluorescence Microscopy and X-ray Diffraction. At the end of the mechanical rupture, Transmission Electron Microscopy was performed at the nanofibrils to determine their size. A lignin removal percentage of 74,1 % was observed for the african oil palm rachis and 65,6 % for the sugarcane bagasse after chemical treatment; which generated microcellulose of 6-12 µm and 10-18 µm for the rachis and bagasse respectively. The mechanical rupture treatment with the high-power sonifier produced nanofibrils of 19-24 nm for the palm rachis and 9,22-12 nm for the cane bagasse; with a Crystallinity Index of 70% in both cases.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Biomasa]]></kwd>
<kwd lng="es"><![CDATA[materiales]]></kwd>
<kwd lng="es"><![CDATA[nanocelulosa]]></kwd>
<kwd lng="es"><![CDATA[residuos]]></kwd>
<kwd lng="es"><![CDATA[degradación]]></kwd>
<kwd lng="en"><![CDATA[Biomass]]></kwd>
<kwd lng="en"><![CDATA[materials]]></kwd>
<kwd lng="en"><![CDATA[nanocellulose]]></kwd>
<kwd lng="en"><![CDATA[waste]]></kwd>
<kwd lng="en"><![CDATA[degradation]]></kwd>
</kwd-group>
</article-meta>
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