{"id":172837,"date":"2026-09-04T11:16:01","date_gmt":"2026-09-04T09:16:01","guid":{"rendered":"https:\/\/concentrol.com\/silicone-surfactants-recycled-polyol-pu-foams\/"},"modified":"2026-09-04T12:22:09","modified_gmt":"2026-09-04T10:22:09","slug":"tensioactius-silicona-poliols-reciclats","status":"publish","type":"post","link":"https:\/\/hosting175685eu-cp704.wordpresstemporal.com\/ca\/tensioactius-silicona-poliols-reciclats\/","title":{"rendered":"AVALUACI\u00d3 DE TENSIOACTIUS DE SILICONA PER A ESCUMES FLEXIBLES DE POLIURET\u00c0 FORMULADES AMB POLIOLS RECICLATS"},"content":{"rendered":"

[vc_row][vc_column][vc_custom_heading text_size=\u00bbh4″ uncode_shortcode_id=\u00bb529309″]<\/p>\n

Introducci\u00f3<\/h2>\n

[\/vc_custom_heading][vc_column_text uncode_shortcode_id=\u00bb174214″]<\/p>\n

La incorporaci\u00f3 de poliols reciclats en escumes flexibles de poliuret\u00e0<\/strong> constitueix una via prometedora per reduir el consum de mat\u00e8ries primeres verges<\/strong> i avan\u00e7ar cap a models de producci\u00f3 m\u00e9s circulars. Tanmateix, la variabilitat qu\u00edmica<\/strong> d\u2019aquests materials pot afectar la compatibilitat de la formulaci\u00f3, l\u2019estabilitat de l\u2019escuma i les seves propietats finals.<\/p>\n

En aquest estudi es van avaluar quatre tensioactius de silicona (E0329_1, E0329_2, E0329_3 i E0329_4)<\/strong> dissenyats per a formulacions flexibles tipus slabstock amb contingut de poliol reciclat. Es van analitzar par\u00e0metres de compatibilitat, estabilitat, regulaci\u00f3 cel\u00b7lular, densitat, duresa (CLD), flux d\u2019aire i deformaci\u00f3 permanent per compressi\u00f3 (compression set, CS)<\/strong>.<\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading heading_semantic=\u00bbh3″ text_size=\u00bbh4″ uncode_shortcode_id=\u00bb211022″]<\/p>\n

Objectiu<\/h2>\n

[\/vc_custom_heading][vc_column_text uncode_shortcode_id=\u00bb187372″]Desenvolupar i seleccionar un tensioactiu de silicona adequat per a formulacions d\u2019escuma flexible basades en poliol reciclat<\/strong>, garantint un equilibri entre estabilitat, regulaci\u00f3 cel\u00b7lular, permeabilitat a l\u2019aire i propietats mec\u00e0niques<\/strong>.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading uncode_shortcode_id=\u00bb696057″]<\/p>\n

Metodologia<\/h2>\n

[\/vc_custom_heading][vc_column_text uncode_shortcode_id=\u00bb683538″]<\/p>\n

Estabilitat<\/h3>\n

Es van dur a terme assaigs de compatibilitat visual amb una formulaci\u00f3 de PU utilitzant cada tensioactiu (1 pphp)<\/strong>, avaluant l\u2019estat inicial, despr\u00e9s de 24 hores a temperatura ambient i despr\u00e9s d\u2019un envelliment accelerat de 7 dies a 50 \u00b0C<\/strong>.<\/p>\n\n\n\n\n\n\n\n\n\n
Component<\/th>\nPphp<\/th>\n<\/tr>\n<\/thead>\n
Poliol OH=48<\/td>\n75<\/td>\n<\/tr>\n
Repoliol<\/td>\n25<\/td>\n<\/tr>\n
H\u2082O<\/td>\n5<\/td>\n<\/tr>\n
TEDA<\/td>\n0,15<\/td>\n<\/tr>\n
DMEE<\/td>\n0,05<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Posteriorment, es van dur a terme assaigs d\u2019escumaci\u00f3 de creixement lliure (free rise)<\/strong> en formulacions slabstock amb un 25 % i un 50 % de poliol reciclat<\/strong>. Es van avaluar l\u2019estabilitat de l\u2019escuma, l\u2019estructura cel\u00b7lular, la duresa (CLD), la densitat, el flux d\u2019aire i el compression set.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading uncode_shortcode_id=\u00bb132894″]<\/p>\n

Resultats<\/h2>\n

[\/vc_custom_heading][vc_single_image media=\u00bb172784″ media_width_percent=\u00bb100″ uncode_shortcode_id=\u00bb259917″][vc_column_text uncode_shortcode_id=\u00bb204085″]<\/p>\n

Figura 1: Assaig inicial<\/h6>\n

[\/vc_column_text][vc_single_image media=\u00bb172790″ media_width_percent=\u00bb100″ uncode_shortcode_id=\u00bb995767″][vc_column_text uncode_shortcode_id=\u00bb798226″]<\/p>\n

Figura 2: 24 h a temperatura ambient<\/h6>\n

[\/vc_column_text][vc_single_image media=\u00bb172796″ media_width_percent=\u00bb100″ uncode_shortcode_id=\u00bb210865″][vc_column_text uncode_shortcode_id=\u00bb126615″]<\/p>\n

Figura 3: Assaig d\u2019envelliment a 50 \u00b0C<\/h6>\n

[\/vc_column_text][vc_column_text uncode_shortcode_id=\u00bb283852″]Els assaigs de compatibilitat van mostrar una bona estabilitat inicial per a tots els tensioactius<\/strong>. Despr\u00e9s de l\u2019envelliment accelerat, la majoria van presentar una certa separaci\u00f3 de fases<\/strong>, evidenciant que les condicions severes poden afectar l\u2019estabilitat del sistema formulat.[\/vc_column_text][vc_custom_heading uncode_shortcode_id=\u00bb124720″]Escumes[\/vc_custom_heading][vc_single_image media=\u00bb172802″ media_width_percent=\u00bb100″ uncode_shortcode_id=\u00bb148614″][vc_column_text uncode_shortcode_id=\u00bb258582″]<\/p>\n

Figura 4: Escumes amb un 25 % de repoliol<\/h6>\n

[\/vc_column_text][vc_column_text uncode_shortcode_id=\u00bb117930″]En les formulacions amb un 25 % de poliol reciclat, tots els candidats van proporcionar una estabilitzaci\u00f3 adequada<\/strong>. Es van observar difer\u00e8ncies clares en permeabilitat a l\u2019aire i regulaci\u00f3 cel\u00b7lular<\/strong>. E0329_4 va presentar la respirabilitat m\u00e9s elevada i una estructura m\u00e9s oberta<\/strong>, mentre que E0329_2 va mostrar un comportament m\u00e9s tancat<\/strong>.[\/vc_column_text][vc_single_image media=\u00bb172808″ media_width_percent=\u00bb100″ uncode_shortcode_id=\u00bb823596″][vc_column_text uncode_shortcode_id=\u00bb131880″]<\/p>\n

Figura 5: Valors de CLD en formulaci\u00f3 amb un 50 % de repoliol<\/h6>\n

[\/vc_column_text][vc_column_text uncode_shortcode_id=\u00bb200424″]<\/p>\n

Amb un 50 % de poliol reciclat no es van observar col\u00b7lapses<\/strong>, confirmant la capacitat estabilitzant de tots els candidats. Els resultats de CLD van indicar diferents nivells de fermesa entre els tensioactius. E0329_1 va generar els valors m\u00e9s elevats<\/strong>, mentre que E0329_4 va produir escumes m\u00e9s toves<\/strong>. E0329_3 va destacar per una estructura cel\u00b7lular m\u00e9s fina i homog\u00e8nia<\/strong>.<\/p>\n

[\/vc_column_text][vc_single_image media=\u00bb172814″ media_width_percent=\u00bb100″ uncode_shortcode_id=\u00bb175023″][vc_column_text uncode_shortcode_id=\u00bb203132″]<\/p>\n

Figura 6: Estructura cel\u00b7lular interna, 50 % repoliol<\/h6>\n

[\/vc_column_text][vc_column_text uncode_shortcode_id=\u00bb129162″]Aix\u00ed mateix, E0329_2, E0329_3 i E0329_4 van mostrar comportaments similars pel que fa al flux d\u2019aire i les c\u00e8l\u00b7lules obertes. Els resultats de compression set van ser acceptables per a totes les formulacions, i E0329_1 i E0329_3 van destacar per presentar els valors m\u00e9s baixos<\/strong>, indicatius d\u2019una millor recuperaci\u00f3 despr\u00e9s de la compressi\u00f3<\/strong>.[\/vc_column_text][vc_single_image media=\u00bb172820″ media_width_percent=\u00bb100″ uncode_shortcode_id=\u00bb138456″][vc_column_text uncode_shortcode_id=\u00bb624027″]<\/p>\n

Figura 7: Densitats i respirabilitat, 50 % repoliol<\/h6>\n

[\/vc_column_text][vc_custom_heading uncode_shortcode_id=\u00bb457521″]<\/p>\n

Conclusions<\/h2>\n

[\/vc_custom_heading][vc_column_text uncode_shortcode_id=\u00bb867325″]<\/p>\n

    \n
  • Tots els tensioactius avaluats van mostrar una capacitat d\u2019estabilitzaci\u00f3 adequada<\/strong> en formulacions amb poliol reciclat.<\/li>\n
  • La compatibilitat va ser satisfact\u00f2ria en condicions est\u00e0ndard, tot i que l\u2019envelliment accelerat va revelar una certa tend\u00e8ncia a la separaci\u00f3 de fases<\/strong>.<\/li>\n
  • E0329_4 va destacar per la seva elevada respirabilitat i el seu car\u00e0cter de cel\u00b7la oberta.<\/strong><\/li>\n
  • E0329_3 va presentar l\u2019estructura cel\u00b7lular m\u00e9s fina i homog\u00e8nia<\/strong> en formulacions amb un 50 % de poliol reciclat.<\/li>\n
  • Els resultats confirmen que la selecci\u00f3 del tensioactiu \u00e9s un factor clau per optimitzar el rendiment d\u2019escumes flexibles sostenibles basades en mat\u00e8ries primeres reciclades.<\/strong><\/li>\n<\/ul>\n

    [\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

    [vc_row][vc_column][vc_custom_heading text_size=\u00bbh4″ uncode_shortcode_id=\u00bb529309″] Introducci\u00f3 [\/vc_custom_heading][vc_column_text uncode_shortcode_id=\u00bb174214″] La incorporaci\u00f3 de poliols reciclats en escumes flexibles de poliuret\u00e0 constitueix una via prometedora […]<\/p>\n","protected":false},"author":36,"featured_media":172830,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[1020,16],"tags":[1378,1382,1376,1377,1379,1380,1381,1375,1383,1384,1374],"class_list":["post-172837","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pu-additives-ca","category-research-blog","tag-additius-per-a-poliureta","tag-compression-set","tag-escuma-flexible-de-poliureta","tag-escuma-pu","tag-estabilitat-de-lescuma","tag-estructura-cellular","tag-flux-daire","tag-poliols-reciclats","tag-poliureta-sostenible","tag-slabstock","tag-tensioactius-de-silicona"],"acf":[],"yoast_head":"\nTensioactius de silicona per a poliols reciclats | PU flexible<\/title>\n<meta name=\"description\" content=\"Tensioactius de silicona per a poliols reciclats: an\u00e0lisi de l\u2019estabilitat, l\u2019estructura 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