ʻO ka pale kino kino i hana ʻia mai nā polymers hiki ke hana ikaika a ʻoi aku ka lōʻihi

Ua aʻo kekahi hui ʻepekema mai ke Kulanui ʻo Brown i kahi pilikia i noho lōʻihi me ka ʻole o ka hopena. No laila, i ka manawa hoʻokahi, ua manaʻo ʻia kahi polymer PBO (polybenzoxazole) lōʻihi loa no ka pale kino. Ma muli o ka polybenzoxazole, ua hana ʻia nā mea kaua kino serial no ka US Army, akā ma hope o kekahi manawa ua hoʻihoʻi ʻia lākou. Ua hoʻohuli ʻia kēia mea o ka pale kino i ka luku ʻole ʻia ma lalo o ka mana o ka wai. ʻAʻole kēia e pale i ka hana ʻana a me ke kūʻai aku ʻana i nā pale kino mai nā hoʻololi like ʻole o ka PBO ma lalo o ka brand Zylon, akā ʻo ka hilinaʻi o nā mea i waiho ʻia i ka nui o ka makemake.

ʻO ka pilikia me ka hilinaʻi o PBO ʻo ia ka hoʻohana ʻana i ka waika polyphosphoric corrosive (PPA) e wāwahi i nā kaulahao polymer i ka wā o ka hana ʻana o ka mea. Hana ka ʻakika ma ke ʻano he mea hoʻoheheʻe a ma ke ʻano he catalyst. ʻO nā molekala waikawa i koe i loko o nā molekele polymer a laila e ʻike iā lākou iho i ka wā o ka hana ʻana o ka pale kino ma ka luku ʻole ʻia o ka mea. Inā hoʻololi ʻoe i ka PPA me kahi mea ʻino ʻole, hiki ke hoʻomaikaʻi maikaʻi ʻia ka hana o nā polymers PBO, akā ma ke aha?

Hoʻohana ka poʻe ʻepekema mai Brown University i ka PBO ma ke ʻano he mea hoʻoikaika no ke kūkulu ʻana i nā kaulahao molekala manaʻoʻia he huila o ke gula (Au) a me ka palladium (Pd) nanoparticles. I ka wā o ka hoʻokolohua, ua ʻike ʻia ka lakio maikaʻi loa o kekahi a me nā mea ʻē aʻe - 40% gula a me 60% palladium - ka mea i hoʻonui i ka hana o ka polymer. I kēia hihia, ʻo ka mea hoʻoheheʻe he waika formic, kahi mea kūlohelohe a hiki ke hoʻololi hou ʻia. Ma keʻano laulā, ʻoi aku ka liʻiliʻi o ke kaʻina hana ʻenehana hou a ʻaʻole like ke kumukūʻai e like me ka hoʻohana ʻana i ka polyphosphoric acid.

Ma hope o ka hana ʻana i ka nui o ka PBO polymer me ka hoʻohana ʻana i ke ʻano hou, ua hoʻāʻo ʻia ma ka hoʻolapalapa ʻana i ka wai a me ka waikawa no nā lā he nui. ʻAʻole i hoʻohaʻahaʻa ʻia ka mea, e hāʻawi ana i ka manaʻolana no ka hoʻonui nui ʻana i ka hana o nā pale pale kino e hoʻohana ana. Ua paʻi ʻia kahi ʻatikala i hoʻolaʻa ʻia no kēia noiʻi ma ka puke pai ?? lelo.

Source: 3dnews.ru