{"id":3453,"date":"2016-10-13T11:25:40","date_gmt":"2016-10-13T17:25:40","guid":{"rendered":"https:\/\/askthescientists.com\/fr\/?post_type=qa&p=3453"},"modified":"2022-07-05T10:59:53","modified_gmt":"2022-07-05T16:59:53","slug":"why-does-the-oil-in-biomega-dissolve-styrofoam","status":"publish","type":"qa","link":"https:\/\/askthescientists.com\/fr\/qa\/why-does-the-oil-in-biomega-dissolve-styrofoam\/","title":{"rendered":"L’huile de poisson dissout-elle le polystyr\u00e8ne?"},"content":{"rendered":"

\"\"<\/p>\n

L\u2019huile de poisson dissout-elle le polystyr\u00e8ne?<\/h2>\n

Toutes les huiles (de poisson, d\u2019olive, de canola, etc.) finissent par dissoudre le polystyr\u00e8ne. Certains types d\u2019huile de poisson le font rapidement, d\u2019autres beaucoup plus lentement. Cette interaction et le rythme auquel elle se produit tiennent \u00e0 une propri\u00e9t\u00e9 chimique\u00a0: la polarit\u00e9.<\/p>\n

La polarit\u00e9 explique l\u2019interaction entre l\u2019huile et le polystyr\u00e8ne<\/h2>\n

La polarit\u00e9<\/a> est une caract\u00e9ristique li\u00e9e \u00e0 la charge \u00e9lectrique des mol\u00e9cules. L\u2019eau est une mol\u00e9cule polaire, avec deux atomes d\u2019hydrog\u00e8ne cr\u00e9ant une charge positive \u00e0 une extr\u00e9mit\u00e9 et un atome d\u2019oxyg\u00e8ne cr\u00e9ant une charge n\u00e9gative \u00e0 l\u2019autre extr\u00e9mit\u00e9. La polarit\u00e9 de l\u2019eau tient au fait que les deux extr\u00e9mit\u00e9s de sa mol\u00e9cule ont des charges oppos\u00e9es. L\u2019huile est apolaire (ou non polaire). \u00c0 la diff\u00e9rence de l\u2019eau, les extr\u00e9mit\u00e9s de sa mol\u00e9cule n\u2019ont pas des charges oppos\u00e9es.<\/p>\n

\"water<\/p>\n

Les diff\u00e9rences de polarit\u00e9 expliquent\u00a0 bon nombre d\u2019interactions chimiques. R\u00e8gle g\u00e9n\u00e9rale, les compos\u00e9s se m\u00e9langent s\u2019ils sont similaires et se s\u00e9parent s\u2019ils sont oppos\u00e9s. En chimie, on parle du principe selon lequel les compos\u00e9s analogues se dissolvent.<\/p>\n

Ainsi l\u2019huile (apolaire) se s\u00e9pare de l\u2019eau (polaire), tandis que le sel (polaire) se dissout dans l\u2019eau. C\u2019est ce qui explique aussi que le dissolvant de vernis \u00e0 ongles<\/a> (apolaire) enl\u00e8ve le vernis (apolaire) et que l\u2019huile dissout le polystyr\u00e8ne, l\u2019un et l\u2019autre \u00e9tant des compos\u00e9s apolaires.<\/p>\n

Selon le type d\u2019huile, le temps de dissolution du polystyr\u00e8ne diff\u00e8re<\/h2>\n

La polarit\u00e9 des mol\u00e9cules varie en intensit\u00e9. Elles peuvent \u00eatre tr\u00e8s polaires ou l\u00e9g\u00e8rement polaires, et tr\u00e8s apolaires ou l\u00e9g\u00e8rement apolaires, \u00e0 diff\u00e9rents degr\u00e9s. Toutes les huiles de poisson sont apolaires, mais certains types le sont plus que d\u2019autres.<\/p>\n

L\u2019huile de poisson est tr\u00e8s apolaire sous forme d\u2019esters \u00e9thyliques, mais elle l\u2019est beaucoup moins sous forme de triglyc\u00e9rides. En fait, plus son apolarit\u00e9 est \u00e9lev\u00e9e, plus vite elle dissout les substances apolaires comme le polystyr\u00e8ne.<\/p>\n

Les bienfaits de l\u2019huile de poisson diff\u00e8rent-ils selon le type choisi\u00a0?<\/h2>\n

Les deux formes d\u2019huile de poisson diff\u00e8rent dans leur capacit\u00e9 \u00e0 dissoudre le polystyr\u00e8ne, mais leurs bienfaits pour la sant\u00e9 sont les m\u00eames. Quelle que soit sa forme, l\u2019huile de poisson est bien absorb\u00e9e et utilis\u00e9e par l\u2019organisme. Les deux formes d\u2019huile de poisson procurent les m\u00eames acides gras om\u00e9ga-3\u00a0 (AEP et ADH) et toutes deux ont fait l\u2019objet de nombreuses \u00e9tudes cliniques qui en valident l\u2019utilisation et en confirment les bienfaits pour la sant\u00e9.<\/p>\n

La concentration en om\u00e9ga-3 est la principale diff\u00e9rence entre les deux formes d\u2019huile de poisson. Sous forme souvent plus concentr\u00e9e d\u2019esters \u00e9thyliques, l\u2019huile de poisson dissout plus rapidement le polystyr\u00e8ne que sous forme de triglyc\u00e9rides. Il faut donc donc prendre une plus grande quantit\u00e9 d\u2019huile de poisson sous forme de triglyc\u00e9rides pour obtenir le m\u00eame apport en acides gras om\u00e9ga-3.<\/p>\n

En choisissant votre huile de poisson, il est inutile de vous soucier de sa capacit\u00e9 \u00e0 dissoudre le polystyr\u00e8ne. Faites plut\u00f4t votre choix en fonction de deux facteurs d\u00e9terminants\u00a0:\u00a0 la puret\u00e9 du produit et son apport en om\u00e9ga 3.<\/p>\n","protected":false},"excerpt":{"rendered":"

L\u2019huile de poisson dissout-elle le polystyr\u00e8ne? Toutes les huiles (de poisson, d\u2019olive, de canola, etc.) finissent par dissoudre le polystyr\u00e8ne. Certains types d\u2019huile de poisson le font rapidement, d\u2019autres beaucoup plus lentement. Cette interaction et le rythme auquel elle se produit tiennent \u00e0 une propri\u00e9t\u00e9 chimique\u00a0: la polarit\u00e9. La polarit\u00e9 explique l\u2019interaction entre l\u2019huile et […]<\/p>\n","protected":false},"author":10897,"featured_media":25889,"menu_order":0,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"qa-category":[],"qa-tag":[20778],"class_list":["post-3453","qa","type-qa","status-publish","format-standard","has-post-thumbnail","hentry","qa-tag-vitamins-and-supplements"],"acf":[],"yoast_head":"\nL'huile de poisson dissout-elle le polystyr\u00e8ne? - Ask The Scientists<\/title>\n<meta name=\"description\" content=\"L'huile de poisson se pr\u00e9sente sous deux formes, chacune ayant des propri\u00e9t\u00e9s uniques. 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