{"id":34935,"date":"1998-01-01T00:00:00","date_gmt":"1998-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sintesis-y-propiedades-tribologicas-de-cristales-liquidos\/"},"modified":"1998-01-01T00:00:00","modified_gmt":"1998-01-01T00:00:00","slug":"sintesis-y-propiedades-tribologicas-de-cristales-liquidos","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/sintesis-y-propiedades-tribologicas-de-cristales-liquidos\/","title":{"rendered":"Sintesis y propiedades tribologicas de cristales liquidos."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Gines Martinez Nicol\u00e1s <\/strong><\/h2>\n<p>En este trabajo se han puesto a punto los m\u00e9todos de preparaci\u00f3n y extracci\u00f3n de cristales l\u00edquidos azo- y cianoderivados para su utilizaci\u00f3n como aditivos antifricci\u00f3n y desgaste. Se utiliza por primera vez la extracci\u00f3n con fluidos supercr\u00edticos para la separaci\u00f3n de cristales l\u00edquidos y se optimizan los par\u00e1metros de extracci\u00f3n, presi\u00f3n y temperatura, mediante la aplicaci\u00f3n del m\u00e9todo simplex. Con ello se mejora el rendimiento de estos productos con respecto al obtenido por cromatograf\u00eda en columna.  se estudia el comportamiento como aditivos de lubricantes de 14 cristales l\u00edquidos, observ\u00e1ndose que adiciones del 1% en peso bastan para reducir la fricci\u00f3n y el desgaste de pares acero-acero y acero-aluminio en ensayos de punz\u00f3n sobre disco seg\u00fan la norma astm g99.  las propiedades lubricantes de los cristales l\u00edquidos ensayados son independientes del tipo de mesofase y de la temperatura de transici\u00f3n.  la adici\u00f3n de un 1% en peso de cristal l\u00edquido a los pol\u00edmeros poliestireno y estirenoacrilonitrilo aumenta considerablemente la resistencia al desgaste de estos materiales frente a acero. Se describe as\u00ed un nuevo tipo de materiales ya que es la primera vez que se utilizan cristales l\u00edquidos cl\u00e1sicos como aditivos antidesgaste de pol\u00edmeros.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Sintesis y propiedades tribologicas de cristales liquidos.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Sintesis y propiedades tribologicas de cristales liquidos. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Gines Martinez Nicol\u00e1s <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Murcia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1998<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Mar\u00eda Dolores Bermudez Olivares<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Enrique Herrera Luque <\/li>\n<li>Jos\u00e9 Esteban Fern\u00e1ndez Rico (vocal)<\/li>\n<li>Carlos Ferrer Gonzalez (vocal)<\/li>\n<li>Segundo Barroso Herrero (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Gines Martinez Nicol\u00e1s En este trabajo se han puesto a punto los m\u00e9todos de preparaci\u00f3n y extracci\u00f3n [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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