Ke hoʻomau nei kekahi pūʻulu ʻepekema mai ka Massachusetts Institute of Technology i ka hana kūleʻa i kahi ala hoihoi. ʻEiwa mau makahiki i hala, ma ka puke pai Nature Communications, limahana MIT , ka mea i hōʻike i ka hoʻomohala ʻana i kahi ʻenehana hoihoi no ka hoʻoponopono ʻana i nā molekala polyethylene. I kona kūlana maʻamau, ʻo ka polyethylene, e like me nā polymers ʻē aʻe, ua like ia me kahi ʻōpala o nā puʻupuʻu spaghetti i hoʻopaʻa pū ʻia. Hoʻolilo kēia i ka polymer i mea hoʻokalakupua wela maikaʻi loa, a makemake mau nā ʻepekema i kahi mea maʻamau. Inā hiki iā mākou ke hana i ka polymer i hiki ke hoʻokuʻu i ka wela ma mua o nā metala! A ʻo nā mea a pau e pono ai no kēia, ʻo ia ka hoʻopololei ʻana i nā molekole polymer i hiki iā lākou ke hoʻololi i ka wela ma o nā monochannels mai ke kumu a hiki i ke kahua hoʻopau. Ua holomua ka hoʻokolohua. Ua hiki i nā kānaka ʻepekema ke hana i nā fiber polyethylene pākahi me ka conductivity thermal maikaʻi loa. Akā ʻaʻole lawa kēia no ka hoʻokomo ʻana i ka ʻoihana.
I kēia lā, ua hoʻopuka ka hui like o nā ʻepekema mai MIT i kahi hōʻike hou e pili ana i nā polymers thermally conductive. Nui nā hana i hana ʻia i nā makahiki ʻeiwa i hala. Ma kahi o ka hana ʻana i nā fibers pākahi, nā ʻepekema mea hoʻokele no ka hana ʻana i ka uhi kiʻiʻoniʻoni thermally conductive. Eia kekahi, no ka hana ʻana i nā kiʻi ʻoniʻoni wela, ʻaʻole i hoʻohana ʻia nā mea maka kūikawā, e like me ʻeiwa mau makahiki i hala, akā ʻo ka pauka polyethylene kūʻai maʻamau no ka ʻoihana.
I loko o kahi mea kanu hoʻokele, hoʻoheheʻe ʻia ka pauka polyethylene i loko o kahi wai a laila hoʻoheheʻe ʻia ka haku mele ma luna o kahi pā i hoʻoluʻu ʻia me ka nitrogen wai. Ma hope o kēia, hoʻomehana ʻia ka mea hana a kau ʻia ma luna o kahi mīkini ʻōwili i ke ʻano o kahi kiʻi ʻoniʻoni lahilahi, ka mānoanoa o kahi kiʻi ʻoniʻoni. Ua hōʻike ʻia nā ana i ka thermally conductive polyethylene film i hana ʻia ma kēia ʻano he 60 W/(m K). No ka hoʻohālikelike, no ke kila he 15 W / (m K), a no ka plastic maʻamau he 0,1-0,5 W / (m K). Hoʻohanohano ʻo Diamond i ka conductivity thermal maikaʻi loa - 2000 W/(m K), akā maikaʻi nō hoʻi ka ʻoi aku o nā metala i ka conductivity thermal.
ʻO ka polymer thermally conductive kekahi mau mea nui ʻē aʻe. No laila, mālama ʻia ka wela ma kahi ʻaoʻao. E noʻonoʻo i kahi pona a i ʻole kelepona e hoʻoneʻe i ka wela mai nā kaʻina hana me ka ʻole o kahi ʻōnaehana hoʻomaha. ʻO nā noi nui ʻē aʻe no ka plasticly conductive plastic me nā kaʻa, nā ʻāpana refrigeration, a me nā mea hou aku. ʻAʻole makaʻu ka plastik i ka ʻino, ʻaʻole hoʻokele uila, māmā a paʻa. ʻO ka hoʻokomo ʻana o ia mau mea i loko o ke ola e hiki ke hoʻoikaika i ka hoʻomohala ʻana i ka ʻoihana ma nā ʻāpana he nui. Manaʻo wau ʻaʻole pono wau e kali i ʻeiwa mau makahiki no kēia lā mālamalama.
Source: 3dnews.ru