<?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>2448-5691</journal-id>
<journal-title><![CDATA[Mundo nano. Revista interdisciplinaria en nanociencias y nanotecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Mundo nano]]></abbrev-journal-title>
<issn>2448-5691</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias Aplicadas y Tecnología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-56912018000200061</article-id>
<article-id pub-id-type="doi">10.22201/ceiich.24485691e.2018.21.62567</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio de la citotoxicidad de películas nanohíbridas con matriz de poliestireno reciclado]]></article-title>
<article-title xml:lang="en"><![CDATA[Study of the cytotoxicity of nanohybrid films with recycled polystyrene matrix]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco-Hernández]]></surname>
<given-names><![CDATA[Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Contreras]]></surname>
<given-names><![CDATA[René]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrano Díaz]]></surname>
<given-names><![CDATA[Paloma]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Padrón]]></surname>
<given-names><![CDATA[Genoveva]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Ingeniería Química e Industrias Extractivas ]]></institution>
<addr-line><![CDATA[Zacatenco ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Escuela Nacional de Estudios Superiores ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Física Aplicada y Tecnología Avanzada Departamento de Nanotecnología]]></institution>
<addr-line><![CDATA[Juriquilla Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>11</volume>
<numero>21</numero>
<fpage>61</fpage>
<lpage>71</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-56912018000200061&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-56912018000200061&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-56912018000200061&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En el presente trabajo se muestra el desarrollo de películas híbridas adaptando el proceso sol&#8211;gel con un control adecuado en el diseño de las condiciones experimentales con el fin de incorporar nanopartículas de sílice a una matriz polimérica de poliestireno reciclado (PSR). Para una mejor incorporación entre la sílice y el psr fue necesario funcionalizar el poliestireno reciclado con grupos carboxilo de ácido abiético (PSRF). El psr utilizado para la preparación de películas nanohíbridas se obtuvo a partir de productos de empaques de comida rápida. Se evaluó la citotoxicidad de las películas de PSR sin sustrato, mostrando viabilidad de utilizarse como películas protectoras en sustratos de vidrio, lo anterior es de alta relevancia debido a que no presentan riesgo para la salud. Los materiales híbridos fueron caracterizados por las espectroscopías infrarrojo. También se evaluaron propiedades mecánicas y térmicas de los materiales híbridos desarrollados. La temperatura de transición vítrea incrementó para los materiales híbridos funcionalizados (HPSF) y los materiales híbridos reciclados&#8211;funcionalizados (HPSRF) debido a la presencia del ácido abiético y la sílice. Todos los materiales incrementaron su ángulo de contacto y la capacidad hidrófoba comparando con el del sustrato sin recubrir. La incorporación de partículas de sílice dentro de la matriz polimérica muestra mejoras interesantes en las propiedades evaluadas en comparación con los materiales híbridos obtenidos a partir de poliestireno comercial (PS). Derivado de estos resultados, los materiales desarrollados en este trabajo se sugieren para aplicaciones como recubrimientos en sustratos de vidrio con propiedades de autolimpieza en términos de hidrofobicidad y protección a la radiación uva que hoy en día son de gran relevancia tecnológica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The present work shows the development of hybrid films adapting the sol-gel process with an adequate control in the design of the experimental conditions in order to incorporate silica nanoparticles to a recycled polystyrene polymer matrix (PSR). For a better incorporation between the silica and the psr it was necessary to functionalize the recycled polystyrene with carboxyl groups of abietic acid (PSRF). The psr used for the preparation of nanohybrid films was obtained from fast food packaging products. The cytotoxicity of the psr films without substrate was evaluated, showing viability to be used as protective films on glass substrates, this is of high relevance due to the fact that they do not present a health risk. The hybrid materials were characterized by infrared spectroscopy. Also, mechanical and thermal properties of the hybrid materials developed were evaluated. The glass transition temperature increased for functionalized hybrid materials (HPSF) and recycled&#8211;functionalized hybrid materials (HPSRF) due to the presence of abietic acid and silica. All materials increased their contact angle and hydrophobic capacity compared to that of the uncoated substrate. The incorporation of silica particles within the polymer matrix shows interesting improvements in the evaluated properties compared to the hybrid materials obtained from commercial polystyrene (PS). Derived from these results, the materials developed in this work are suggested for applications such as coatings on glass substrates with self&#8211;cleaning properties in terms of hydrophobicity and uva radiation protection, which are of great technological relevance today.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[poliestireno reciclado]]></kwd>
<kwd lng="es"><![CDATA[películas híbridas]]></kwd>
<kwd lng="es"><![CDATA[citotoxicidad]]></kwd>
<kwd lng="es"><![CDATA[hidrofobicidad]]></kwd>
<kwd lng="en"><![CDATA[recycled polystyrene]]></kwd>
<kwd lng="en"><![CDATA[hybrid films]]></kwd>
<kwd lng="en"><![CDATA[cytotoxicity]]></kwd>
<kwd lng="en"><![CDATA[hydrophobicity]]></kwd>
</kwd-group>
</article-meta>
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