<?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>1692-3561</journal-id>
<journal-title><![CDATA[Biotecnología en el Sector Agropecuario y Agroindustrial]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Bio.Agro]]></abbrev-journal-title>
<issn>1692-3561</issn>
<publisher>
<publisher-name><![CDATA[Taller Editorial Universidad del Cauca]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1692-35612014000200007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[FIBRAS DE FIQUE UNA ALTERNATIVA PARA EL REFORZAMIENTO DE PLÁSTICOS. INFLUENCIA DE LA MODIFICACIÓN SUPERFICIAL]]></article-title>
<article-title xml:lang="en"><![CDATA[FIQUE FIBER AN ALTERNATIVE FOR REINFORCED PLASTICS. INFLUENCE OF SURFACE MODIFICATION]]></article-title>
<article-title xml:lang="pt"><![CDATA[FIBRAS DE FIQUE UMA ALTERNATIVA PARA REFORÇAR MATERIAIS PLÁSTICOS. INFLUÊNCIA DA MODIFICAÇÃO SUPERFICIAL]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MUÑOZ-VELEZ]]></surname>
<given-names><![CDATA[MARIO FERNANDO]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[HIDALGO-SALAZAR]]></surname>
<given-names><![CDATA[MIGUEL ANGEL]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MINA-HERNANDEZ]]></surname>
<given-names><![CDATA[JOSE HERMINSUL]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad del Valle Escuela de Ingeniería de Materiales Grupo de Materiales Compuestos (GMC)]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Autónoma de Occidente Departamento de Energética y Mecánica Grupo en tecnología para la manufactura (GITEM)]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad del Valle Grupo de Materiales Compuestos (GMC) ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<volume>12</volume>
<numero>2</numero>
<fpage>60</fpage>
<lpage>70</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1692-35612014000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1692-35612014000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1692-35612014000200007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este trabajo se estudian las propiedades fisicoquímicas, mecánicas y térmicas de fibras naturales de fique, susceptibles de ser usadas como refuerzo de matrices poliméricas. Las fibras fueron sometidas a modificaciones superficiales a partir de tratamientos químicos que convencionalmente son empleados para promover la compatibilidad de las fibras naturales (hidrofílicas) con matrices de naturaleza polimérica (hidrofóbicas). El proceso de modificación superficial de las fibras se llevó a cabo mediante un tratamiento de alcalinización con NaOH, seguido del injerto de un agente de acoplamiento tipo silano y finalmente una pre-impregnación con polietileno. Mediante la ejecución de ensayos de FTIR se logró observar los grupos funcionales típicos de las fibras nativas y se corroboró la correcta ejecución de las modificaciones superficiales propuestas;de igual manera, la caracterización térmica por TGA permitió evidenciar la pérdida de hemicelulosa y lignina que fueron removidas con el tratamiento alcalino, y la aparición de una nueva transición debida al polietileno depositado posteriormente con el tratamiento de preimpregnación. Finalmente, se encontró que el tratamiento alcalino condicionó las propiedades mecánicas de las fibras tratadas, siendo despreciable la influencia de la silanización y la preimpregnación en esta caracterización.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[In this paper are studied the physicochemical, mechanical and thermal properties of the natural fique fibers, that can be used as reinforcement of polymeric matrices. The fibers were subjected to superficial modifications from chemical treatments which are conventionally used to promote the compatibility of natural fibers (hydrophilics) with matrices of polymeric nature (hydrophobics). The superficial modification process of the fibers was carried out by alkalinization treatment with NaOH, followed by grafting of a coupling agent type silane and then a pre-impregnation with polyethylene. By running FTIR tests, it was possible to observe functional typical groups of native fibers and confirmed the proper execution of the superficial modifications proposed; in the same way, the thermal characterization by TGA allowed to demonstrate the loss of hemicellulose and lignin, that were removed with alkaline treatment, and the appearance of a new transition due to the polyethylene deposited subsequently with the pre-impregnate treatment. Finally, it was found that the alkaline treatment conditioned the mechanical properties of the treated fibers, being negligible the influence of silanization and the pre-impregnation in this characterization.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Este documento estuda as propriedades físico-químicas, mecânicas e térmicas de fibras naturais de fique, susceptíveis para ser usados como reforço de matrizes poliméricas. As fibras foram sujeitas a modificações superficiais a partir de tratamentos químicos que convencionalmente são utilizados para promover a compatibilidade das fibras naturais (hidrofílicas) com matrizes de natureza poliméricas (hidrofóbicas). O processo de modificação superficial das fibras foi realizado por um tratamento de alcalinização com NaOH, seguido do enxerto de um agente de acoplamento tipo salino, e finalmente, uma pre-impregnação com polietileno. Através da execução dos ensaios de FTIR, foi possível observar os típicos grupos funcionais das fibras nativas e foi corroborada a correta execução das modificações superficiais propostas; também a caracterização térmica por TGA, permitiu evidenciar a perda de hemicelulose e lenhina, que foram removidas com o tratamento alcalino e, o aparecimento de uma nova transição devido ao polietileno depositado subsequentemente com o tratamento de pre-impregnação. Finalmente, foi encontrado que o tratamento alcalino condicionou as propriedades mecânicas das fibras tratadas, sendo insignificante a influência da silanização e, a pré- impregnação presente nesta caracterização.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Fique]]></kwd>
<kwd lng="es"><![CDATA[Fibras naturales]]></kwd>
<kwd lng="es"><![CDATA[Tratamientos químicos]]></kwd>
<kwd lng="es"><![CDATA[Desempeño físico-mecánico]]></kwd>
<kwd lng="es"><![CDATA[Refuerzo fibroso]]></kwd>
<kwd lng="en"><![CDATA[Fique]]></kwd>
<kwd lng="en"><![CDATA[Natural fibers]]></kwd>
<kwd lng="en"><![CDATA[Chemical treatments]]></kwd>
<kwd lng="en"><![CDATA[Physical-mechanical performance]]></kwd>
<kwd lng="en"><![CDATA[fibrous reinforcement]]></kwd>
<kwd lng="pt"><![CDATA[Fique]]></kwd>
<kwd lng="pt"><![CDATA[Fibras naturais]]></kwd>
<kwd lng="pt"><![CDATA[Tratamento químico]]></kwd>
<kwd lng="pt"><![CDATA[Desempenho físico-mecânico]]></kwd>
<kwd lng="pt"><![CDATA[reforço fibroso]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  ]]></body><back>
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