{"id":719152,"date":"2018-02-24T13:03:21","date_gmt":"2018-02-24T10:03:21","guid":{"rendered":"http:\/\/www.fyysika.ee\/?p=719152"},"modified":"2018-03-04T11:48:44","modified_gmt":"2018-03-04T08:48:44","slug":"pressitud-puit-on-parem","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=719152","title":{"rendered":"Pressitud puit on parem"},"content":{"rendered":"<p><a href=\"http:\/\/www.fyysika.ee\/wp-content\/uploads\/2018\/02\/2018-02-21-wood_main.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-719153\" src=\"http:\/\/www.fyysika.ee\/wp-content\/uploads\/2018\/02\/2018-02-21-wood_main-300x162.jpg\" alt=\"\" width=\"300\" height=\"162\" srcset=\"https:\/\/www.fyysika.ee\/wp-content\/uploads\/2018\/02\/2018-02-21-wood_main-300x162.jpg 300w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2018\/02\/2018-02-21-wood_main.jpg 700w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>See on tugevam kui teras, kergem kui metallisulamid ja suudab n\u00e4iteks kuule peatada. Siiski on see &#8220;supermaterjal&#8221; tehtud p\u00f5hiliselt uudsel viisil t\u00f6\u00f6deldud ja kokku pressitud puidust.<\/p>\n<p>Puit on komposiit, milles pikad tselluloosi kiud on seotud \u00fchtseks materjaliks ligniiniga. Lisaks sellele sisaldab puit ka peenikesi torusid, mis moodustavad puidu kapillaars\u00fcsteemi.<\/p>\n<p>Sellist s\u00fcsteemi t\u00f6\u00f6deldi k\u00f5igepealt soolalahusega, mis eemaldas enamuse ligniini ja hemitselluloosi, muutes raku seinad poorseks ja v\u00e4hem j\u00e4igaks. P\u00e4rast seda pressiti puit 100\u00a0\u00b0C temperatuuril, mille tulemusena raku seinad ja kapilaars\u00fcsteem andsid j\u00e4rele ja puit vajus kokku vaid 20% oma esialgsest paksusest.<\/p>\n<p>Muutusid ka puidu omadused.<\/p>\n<p>T\u00f6\u00f6 avaldas Liangbing Hu\u00a0t\u00f6\u00f6r\u00fchm Marylandi \u00fclikooli energiauuringute keskusest.<\/p>\n<p>Allikad:<\/p>\n<p><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-01600-6\">https:\/\/www.nature.com\/articles\/d41586-018-01600-6<\/a><\/p>\n<p><a href=\"http:\/\/physicsworld.com\/cws\/article\/news\/2018\/feb\/21\/wood-based-supermaterial-is-stronger-and-tougher-than-steel\">physicsworld.com<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>See on tugevam kui teras, kergem kui metallisulamid ja suudab n\u00e4iteks kuule peatada. Siiski on see &#8220;supermaterjal&#8221; tehtud p\u00f5hiliselt uudsel viisil t\u00f6\u00f6deldud ja kokku pressitud puidust. Puit on komposiit, milles pikad tselluloosi kiud on seotud \u00fchtseks materjaliks ligniiniga. Lisaks sellele sisaldab puit ka peenikesi torusid, mis moodustavad puidu kapillaars\u00fcsteemi. Sellist s\u00fcsteemi t\u00f6\u00f6deldi k\u00f5igepealt soolalahusega, mis [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":719153,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[16],"tags":[],"class_list":{"0":"post-719152","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-teadusuudis","8":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/719152","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=719152"}],"version-history":[{"count":6,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/719152\/revisions"}],"predecessor-version":[{"id":719179,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/719152\/revisions\/719179"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/media\/719153"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=719152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=719152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=719152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}