<?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>1405-7743</journal-id>
<journal-title><![CDATA[Ingeniería, investigación y tecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. invest. y tecnol.]]></abbrev-journal-title>
<issn>1405-7743</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Ingeniería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-77432016000100099</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la sulfonación del estireno-éster acrílico sobre las propiedades de las membranas de intercambio protónico]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of the Sulfonation of Styrene-Acrylic Ester on the Properties of Proton Exchange Membranes]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Realpe-Jiménez]]></surname>
<given-names><![CDATA[Álvaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maza-Puerta]]></surname>
<given-names><![CDATA[Yilmar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acevedo-Morantes]]></surname>
<given-names><![CDATA[María Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Barros]]></surname>
<given-names><![CDATA[Adriana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Cartagena Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Cartagena Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Cartagena Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Cartagena Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2016</year>
</pub-date>
<volume>17</volume>
<numero>1</numero>
<fpage>99</fpage>
<lpage>107</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-77432016000100099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-77432016000100099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-77432016000100099&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En este trabajo se estudió el efecto de la sulfonación de estireno-éster acrílico y adición de nanopartículas de dióxido de titanio sobre las membranas de intercambio protónico. Se evaluó la caracterización fisicoquímica de las membranas, tales como: la capacidad de absorción de agua, su capacidad de intercambio iónico, las propiedades mecánicas de tracción/deformación y los grupos químicos funcionales presentes en la estructura de las membranas mediante análisis FTIR. La absorción de agua incrementa con el aumento del tiempo de reacción de la sulfonación y llega hasta 60.9% después de 8 horas de sulfonación; mientras la capacidad de intercambio iónico de las membranas cargada-sulfonada también aumenta con el tiempo de la reacción de sulfonación y con aumento de la carga de TiO2, alcanzando un valor de 0.39 miliequivalente/gramo para 8 horas y cargada con 4% de TiO2. Se observó que la elasticidad de las membranas sintetizadas se incrementó con el crecimiento del tiempo de reacción y disminuyó con la adición de la carga. Este conjunto de propiedades fisicoquímica permite considerar la membrana con alto potencial de aplicación en el área de las celdas de combustible.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In this work was studied the effect of sulfonation of styrene-acrylic ester and of titanium dioxide nanoparticles on the proton exchange membranes. It was evaluated the physicochemical characterization of membranes, such as, the water uptake capacity, ion exchange capacity, the mechanic properties of stress/strain, and the chemical functional groups present in the membrane structure by FTIR analysis. Water uptake increases with increasing the time of sulfonation reaction, reaching 60.9% after 8 hours of sulfonation; while, ion exchange capacity of loaded-sulfonated membrane increases with increasing the time of sulfonation reaction and with increasing the TiO2 load, reaching 0.39 meq/g for 8 hours and 4% TiO2. It was observed that the elasticity of the synthesized membranes increases with increasing the time of sulfonation reaction, and it decreases with the addition of the TiO2 load. This physicochemical property set allows to consider the membrane with high potential of application in the fuel cells area.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[membrana de intercambio protónico]]></kwd>
<kwd lng="es"><![CDATA[estireno-éster acrílico]]></kwd>
<kwd lng="es"><![CDATA[sulfonación]]></kwd>
<kwd lng="es"><![CDATA[nanopartículas]]></kwd>
<kwd lng="es"><![CDATA[dióxido de titanio]]></kwd>
<kwd lng="en"><![CDATA[proton exchange membrane]]></kwd>
<kwd lng="en"><![CDATA[styrene-acrylic ester]]></kwd>
<kwd lng="en"><![CDATA[sulfonation]]></kwd>
<kwd lng="en"><![CDATA[nanoparticles]]></kwd>
<kwd lng="en"><![CDATA[titanium dioxide]]></kwd>
</kwd-group>
</article-meta>
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