{"id":21046304,"date":"2019-05-15T09:07:19","date_gmt":"2019-05-15T07:07:19","guid":{"rendered":"https:\/\/geek.hr\/znanost\/?p=21046304"},"modified":"2019-05-11T16:57:45","modified_gmt":"2019-05-11T14:57:45","slug":"stvorena-je-plastika-koja-se-moze-neograniceno-reciklirati","status":"publish","type":"post","link":"https:\/\/geek.hr\/znanost\/clanak\/stvorena-je-plastika-koja-se-moze-neograniceno-reciklirati\/","title":{"rendered":"Stvorena je plastika koja se mo\u017ee neograni\u010deno reciklirati"},"content":{"rendered":"<p>Amerikanci su od 2015. reciklirali manje od 10% plastike koju su koristili. To nije tako samo zbog lijenosti, nego je i stvar u tome \u0161to mnoge vrste plastike nisu pogodne za recikliranje.<\/p>\n<p><a href=\"https:\/\/newscenter.lbl.gov\/2019\/05\/06\/recycling-plastic-from-the-inside-out\/\" target=\"_blank\" rel=\"noopener noreferrer\">Znanstvenici laboratorija Berkeley<\/a> tvrde da su izumili plastiku koja se mo\u017ee neograni\u010deno razgra\u0111ivati i reciklirati. Upravo to bi moglo svijetu pomo\u0107i rije\u0161iti veliki problem zaga\u0111enja plastikom.<\/p>\n<p>Sve plasti\u010dne mase se sastoje od velikih molekula polimera koji sadr\u017ee spojeve monomere.<\/p>\n<p>Obi\u010dno se u plastiku dodaju kemikalije koje im daju neka svojstva, primjerice \u010dvrsto\u0107u ili savitljivost. One se, pak, ve\u017eu \u010dvrsto za monomere te ostaju u njima \u010dak i nakon \u0161to plastika pro\u0111e kroz recikliranje.<\/p>\n<p>Problem je u tome \u0161to proizvo\u0111a\u010di rabe reciklirane monomere za pravljenje nove plastike. Pritom ne mogu konkretno znati koja su svojstva iz izvorne plastike mogla ostati u njoj.<\/p>\n<p>Ipak, <a href=\"https:\/\/www.nature.com\/articles\/s41557-019-0249-2\" target=\"_blank\" rel=\"noopener noreferrer\">u studiji<\/a> objavljenoj u \u010dasopisu <em>Nature<\/em>, tim s Berkeleya je opisao stvaranje nove vrste polidiketoenamin ili PDK plastike.<\/p>\n<p>Veze izme\u0111u aditiva i monomera su reverzibilne, a ne trajne. Otapaju se kad se materijal stavi u kiselu otopinu. To je stru\u010dnjacima omogu\u0107ilo kori\u0161tenje obnovljenih monomera za recikliranje plastike koja nije pokazala ista svojstva kao reciklirana plastika.<\/p>\n<p>Ovo otkri\u0107e predstavlja veliki uspjeh. Pogotovo kad se uzme u obzir da su neke &#8220;razgradive&#8221; vre\u0107ice <a href=\"https:\/\/www.theguardian.com\/environment\/2019\/apr\/29\/biodegradable-plastic-bags-survive-three-years-in-soil-and-sea?utm_source=dlvr.it&amp;utm_medium=twitter\" target=\"_blank\" rel=\"noopener noreferrer\">prona\u0111ene u nerazgra\u0111enom stanju u tlu i u moru.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ima nade<\/p>\n","protected":false},"author":10022,"featured_media":21046303,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[16372],"tags":[16954,18780,19987],"class_list":["post-21046304","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ekologija-i-okolis","tag-plastika","tag-razgradnja-plastike","tag-recikliranje"],"modified_by":null,"_links":{"self":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts\/21046304","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/users\/10022"}],"replies":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/comments?post=21046304"}],"version-history":[{"count":0,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts\/21046304\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/media\/21046303"}],"wp:attachment":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/media?parent=21046304"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/categories?post=21046304"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/tags?post=21046304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}