{"id":17927,"date":"2018-03-09T09:06:14","date_gmt":"2018-03-09T09:06:14","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sa%c2%adntesis-de-carboximetil-celulosa-cmc-a-partir-de-pastas-de-plantas-anuales\/"},"modified":"2018-03-09T09:06:14","modified_gmt":"2018-03-09T09:06:14","slug":"sa%c2%adntesis-de-carboximetil-celulosa-cmc-a-partir-de-pastas-de-plantas-anuales","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ingenieria-y-tecnologia-quimicas\/sa%c2%adntesis-de-carboximetil-celulosa-cmc-a-partir-de-pastas-de-plantas-anuales\/","title":{"rendered":"S\u00edntesis de carboximetil celulosa (cmc) a partir de pastas de plantas anuales"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Claudia Barba Pacheco <\/strong><\/h2>\n<p>El presente trabajo describe la preparaci\u00f3n y caracterizaci\u00f3n de muestras de carboximetilcelulosa (cmc) a partir de diferentes materiales lignocelul\u00f3sicos tanto residuales como no madereros, as\u00ed como el estudio de la influencia de las condiciones de preparaci\u00f3n de la materia de partida y sus caracter\u00edsticas sobre las propiedades finales de las cmcs obtenidas. La producci\u00f3n de carboximetilcelulosa a partir de estos materiales supone una importante contribuci\u00f3n ya que, en la mayor\u00eda de los casos, el derivado se obtiene a partir de linters de algod\u00f3n y madera de pino y eucalipto.  las muestras de cmc fueron preparadas a partir de pastas procedentes de tres diferentes tipos de cocciones:  * pastas blanqueadas de pino, chopo y paja de trigo, provenientes de procesos de cocci\u00f3n con sosa\/antraquinona con tiempos de residencia que abarcaban desde los convencionales de aproximadamente 90 min hasta tiempos de cocci\u00f3n r\u00e1pidos del orden de 3 min.  * pastas blanqueadas de miscanthus sinensis, bagazo de ca\u00f1a de az\u00facar y henequ\u00e9n cocidas mediante el m\u00e9todo irsp (impregnation rapid steam explosion process).  * pastas papeleras comerciales y blanqueadas provenientes de procesos convencionales sosa\/antraquinona de abac\u00e1, sisal, yute y lino.  la reacci\u00f3n de terificaci\u00f3n se llev\u00f3 a cabo siguiendo el procedimiento druvacell a escala laboratorio para la obtenci\u00f3n de cmc con alto grado de pureza. Esta se realiz\u00f3 utilizando siempre las mismas condiciones de operaci\u00f3n y relaci\u00f3n cuantitativa de los materiales presentes.  los productos purificados fueron caracterizados en funci\u00f3n de su grado de sustituci\u00f3n (ds), pureza, solubilidad, viscosidad intr\u00ednseca (n) de soluciones de cmc en nacl 0.1m, peso molecular y comportamiento reol\u00f3gico de soluciones de cmc a diferentes concentraciones. Se encontr\u00f3 que el ds de las cmcs sintetizadas en el laboratorio dependen en gran medida de la morfolog\u00eda del material lignocelul\u00f3sico del cual p<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>S\u00edntesis de carboximetil celulosa (cmc) a partir de pastas de plantas anuales<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 S\u00edntesis de carboximetil celulosa (cmc) a partir de pastas de plantas anuales <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Claudia Barba Pacheco <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Rovira i virgili<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 28\/06\/2002<\/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>Xavier Farriol Roig\u00e9s<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: marguerite Rinaudo <\/li>\n<li> De vega mart\u00edn Alberto (vocal)<\/li>\n<li>teresa Vidal llucia (vocal)<\/li>\n<li>jordi Reguan miranda (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Claudia Barba Pacheco El presente trabajo describe la preparaci\u00f3n y caracterizaci\u00f3n de muestras de carboximetilcelulosa (cmc) a [&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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