{"id":32845,"date":"2019-10-31T21:49:15","date_gmt":"2019-10-31T18:49:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/radiatory-dlya-protsessorov-mogut-stat-plastikovymi-i-eto-ne-zagovor-proizvoditelej\/"},"modified":"2019-10-31T21:49:15","modified_gmt":"2019-10-31T18:49:15","slug":"radiatory-dlya-protsessorov-mogut-stat-plastikovymi-i-eto-ne-zagovor-proizvoditelej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/radiatory-dlya-protsessorov-mogut-stat-plastikovymi-i-eto-ne-zagovor-proizvoditelej","title":{"rendered":"CPU-k\u00f8lere kan v\u00e6re lavet af plastik, og det er ikke en konspiration fra producenternes side","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

En gruppe forskere fra Massachusetts Institute of Technology forts\u00e6tter med at arbejde med et meget interessant projekt. For ni \u00e5r siden offentliggjorde MIT's medarbejdere <\/a>en rapport<\/a><\/noindex>, hvor de meddelte udviklingen af en sp\u00e6ndende teknologi til at str\u00e6kke molekyler af polyethylen. I sin normale tilstand ligner polyethylen, ligesom andre polymerer, en gr\u00f8d af samlet spagetti. Dette g\u00f8r polymeren til en fremragende varmeisolator, men forskerne har altid \u00f8nsket noget us\u00e6dvanligt. T\u00e6nk hvis man kunne lave en polymer, der kunne lede varme lige s\u00e5 godt som metaller! Og alt, hvad der skal g\u00f8res, er at str\u00e6kke polymerens molekyler, s\u00e5 de kan transportere varme fra kilden til det sted, hvor den skal fordeles. Eksperimentet lykkedes. Forskerne form\u00e5ede at skabe separate polyethylenfibre med fremragende varmeledningsevne. Men dette var ikke nok til industriel anvendelse.<\/p>\n

\"CPU-k\u00f8lere<\/p>\n

I dag har den samme gruppe forskere fra MIT offentliggjort en ny rapport om varmeledende polymerer. I l\u00f8bet af de seneste ni \u00e5r er der udf\u00f8rt et stort arbejde. I stedet for at fremstille separate fibre <\/a>har forskerne udviklet og skabt<\/a><\/noindex> et pilotanl\u00e6g til produktion af varmeledende filmbel\u00e6gning. Desuden blev der ved fremstillingen af varmeledende film brugt ikke det unikke r\u00e5materiale fra for ni \u00e5r siden, men almindeligt kommercielt pulverpolyethylen til industrien.<\/p>\n

I den professionelle ops\u00e6tning opl\u00f8ses polyethylenpulver i v\u00e6sken, hvorefter blandingen spr\u00f8jtes p\u00e5 en plade, der er nedk\u00f8lt med flydende nitrogen. Herefter opvarmes og str\u00e6kkes emnet p\u00e5 en valsemaskine til en tilstand af en tynd film, der er s\u00e5 tynd som indpakningspapir. M\u00e5lingerne har vist, at den p\u00e5 denne m\u00e5de fremstillede varmeledende polyethylenfilm har en varmeledningsevne p\u00e5 60 W\/(m\u00b7K). Til sammenligning er dette tal for st\u00e5l 15 W\/(m\u00b7K), mens almindelig plastik er 0,1\u20130,5 W\/(m\u00b7K). Den bedste varmeledende evne tilh\u00f8rer diamant \u2013 2000 W\/(m\u00b7K), men at overg\u00e5 metaller i varmeledningsevne er ogs\u00e5 godt.<\/p>\n

<\/center><\/p>\n

Varmetransportpolymere har ogs\u00e5 en r\u00e6kke andre vigtige egenskaber. Varme ledes strengt i \u00e9n retning. Forestil dig en b\u00e6rbar computer eller smartphone, der leder varme v\u00e6k fra processorerne uden aktiv k\u00f8ling. Andre vigtige anvendelsesomr\u00e5der for varmeledende plastik kan v\u00e6re biler, k\u00f8lesystemer og andet. Plastik er korrosionsbestandigt, leder ikke elektricitet, og er let og st\u00e6rkt. Implementeringen af s\u00e5danne materialer kan give et boost til udviklingen af industrien i mange sektorer. Man ville \u00f8nske, at det lysende \u00f8jeblik ikke skulle vente yderligere ni \u00e5r.<\/p>\n

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Kilde: 3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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