Ib pawg ntawm cov kws tshawb fawb los ntawm Massachusetts Institute of Technology tseem ua tiav kev ua haujlwm hauv kev nthuav dav heev. Cuaj xyoo dhau los, hauv phau ntawv Journal Nature Communications, MIT cov neeg ua haujlwm , uas tau tshaj tawm txog kev txhim kho ntawm kev nthuav dav thev naus laus zis rau straightening polyethylene molecules. Nyob rau hauv nws lub xeev ib txwm, polyethylene, zoo li lwm yam polymers, zoo li ib tug mess ntawm ntau lumps ntawm spaghetti daig ua ke. Qhov no ua rau cov polymer yog ib qho zoo heev thermal insulator, thiab cov kws tshawb fawb yeej ib txwm xav tau ib yam dab tsi txawv txawv. Yog tias tsuas yog peb tuaj yeem ua cov polymer uas tuaj yeem ua kom sov tsis muaj qhov phem dua li cov hlau! Thiab txhua yam uas xav tau rau qhov no yog kom ncaj cov polymer molecules kom lawv tuaj yeem hloov cov cua sov los ntawm ib qho ntawm qhov chaw mus rau qhov chaw dissipation. Qhov kev sim tau ua tiav. Cov kws tshawb fawb muaj peev xwm tsim ib tus neeg polyethylene fibers nrog thermal conductivity zoo heev. Tab sis qhov no tsis txaus rau kev taw qhia rau hauv kev lag luam.
Niaj hnub no, tib pab pawg kws tshawb fawb los ntawm MIT tau tshaj tawm tsab ntawv tshaj tawm tshiab ntawm thermally conductive polymers. Ntau txoj haujlwm tau ua tiav nyob rau cuaj xyoo dhau los. Es tsis txhob ua ib tus neeg fibers, cov kws tshawb fawb pilot cog rau zus tau tej cov thermally conductive zaj duab xis txheej. Ntxiv mus, los tsim cov yeeb yaj kiab ua cua sov, tsis yog cov khoom siv tshwj xeeb tau siv, zoo li cuaj xyoo dhau los, tab sis cov khoom lag luam zoo tib yam polyethylene hmoov rau kev lag luam.
Nyob rau hauv ib tug pilot cog, polyethylene hmoov yog yaj nyob rau hauv ib tug kua thiab ces cov muaj pes tsawg leeg yog sprayed mus rau ib lub phaj txias nrog kua nitrogen. Tom qab no, lub workpiece yog rhuab thiab ncab ntawm lub tshuab dov mus rau lub xeev ntawm ib tug nyias zaj duab xis, lub thickness ntawm ib tug wrapping zaj duab xis. Kev ntsuas tau pom tias cov thermally conductive polyethylene zaj duab xis uas ua los ntawm txoj kev no muaj thermal conductivity coefficient ntawm 60 W / (m K). Rau kev sib piv, rau steel daim duab no yog 15 W / (m K), thiab rau cov yas zoo tib yam nws yog 0,1-0,5 W / (m K). Pob zeb diamond boasts qhov zoo tshaj plaws thermal conductivity - 2000 W / (m K), tab sis tshaj hlau nyob rau hauv thermal conductivity kuj zoo.
Lub thermally conductive polymer kuj muaj ntau lwm yam khoom tseem ceeb. Yog li, cua sov yog ua nruj me ntsis hauv ib qho kev taw qhia. Xav txog lub laptop lossis smartphone uas tshem tawm cov cua sov ntawm cov processors yam tsis muaj lub tshuab ua kom txias. Lwm cov ntawv thov tseem ceeb rau cov yas thermally muaj xws li tsheb, chav tub yees, thiab lwm yam. Yas tsis ntshai corrosion, tsis ua hluav taws xob, yog lub teeb yuag thiab ruaj khov. Kev taw qhia ntawm cov ntaub ntawv zoo li no tuaj yeem ua rau muaj kev cuam tshuam rau kev txhim kho kev lag luam hauv ntau cov haujlwm. Kuv xav tias kuv tsis tas yuav tos cuaj xyoo ntxiv rau hnub ci ntsa iab no.
Tau qhov twg los: 3d xov.ru