Zikomo polembetsa ku Physical World Ngati mukufuna kusintha zambiri zanu nthawi iliyonse, chonde pitani ku akaunti yanga
Uchi ndi zakumwa zina zokhuthala kwambiri zimayenda mofulumira kuposa madzi m'mitsempha yamagazi yokhala ndi zokutidwa mwapadera. Zomwe zidapezeka modabwitsa zidapezeka ndi Maja Vuckovac ndi anzake ku Aalto University ku Finland, omwe adawonetsanso kuti izi zimachokera ku kuletsa kuyenda kwamkati mkati mwa madontho okhuthala ambiri. Zotsatira zawo zikutsutsana mwachindunji ndi zitsanzo zamakono za momwe zakumwa zimayendera m'mitsempha yamagazi yopanda madzi ambiri.
Gawo la ma microfluidics limaphatikizapo kuwongolera kuyenda kwa madzi m'malo otsekedwa bwino a mitsempha yamagazi - nthawi zambiri popanga zida zamankhwala. Madzi otsika kwambiri ndi abwino kwambiri kwa ma microfluidics chifukwa amayenda mwachangu komanso mosavuta. Madzi ambiri okhuthala angagwiritsidwe ntchito powayendetsa pamavuto akulu, koma izi zimawonjezera kupsinjika kwa makina m'makoma ofooka a mitsempha yamagazi - zomwe zingayambitse kulephera.
Kapenanso, kuyenda kwa madzi kumatha kufulumizitsidwa pogwiritsa ntchito chophimba cha superhydrophobic chomwe chili ndi ma cushion ndi nanostructures omwe amasunga ma cushion a mpweya. Ma cushion awa amachepetsa kwambiri malo olumikizirana pakati pa madzi ndi pamwamba, zomwe zimachepetsa kukangana - kuonjezera kuyenda kwa madzi ndi 65%. Komabe, malinga ndi chiphunzitso chamakono, kuchuluka kwa madzi kumeneku kumapitirira kuchepa ndi kukhuthala kowonjezereka.
Gulu la Vuckovac linayesa chiphunzitsochi poyang'ana madontho a kukhuthala kosiyanasiyana pamene mphamvu yokoka imakoka kuchokera ku mitsempha yoyima yokhala ndi zokutira zamkati zowopsa kwambiri. Pamene akuyenda mofulumira, madonthowo amakanikizira mpweya pansi pawo, ndikupanga kupanikizika kofanana ndi komwe kuli mu piston.
Ngakhale madontho amasonyeza ubale wosiyana pakati pa kukhuthala ndi kuchuluka kwa madzi m'machubu otseguka, pamene mbali imodzi kapena zonse ziwiri zinatsekedwa, malamulowo anasinthidwa kotheratu. Zotsatira zake zinali zoonekera kwambiri ndi madontho a glycerol—ngakhale kuti anali okhuthala kwambiri kuposa madzi katatu, ankayenda mofulumira kuposa madzi nthawi zoposa 10.
Pofuna kupeza fizikisi yomwe ili kumbuyo kwa izi, gulu la Vuckovac linalowetsa tinthu tating'onoting'ono m'madontho. Kuyenda kwa tinthuti pakapita nthawi kunawonetsa kuyenda kwachangu mkati mwa dontho losakhuthala kwambiri. Kuyenda kumeneku kumapangitsa kuti madziwo alowe m'mapangidwe ang'onoang'ono ndi ang'onoang'ono mu chophimbacho. Izi zimachepetsa makulidwe a khushoni ya mpweya, kuletsa mpweya wopanikizika pansi pa dontho kuti usapitirire kuti ugwirizane ndi kupanikizika. Mosiyana ndi zimenezi, glycerin ilibe kuyenda kwamkati komwe kumaonekera, zomwe zimalepheretsa kulowa kwake mu chophimbacho. Izi zimapangitsa khushoni ya mpweya kukhala yokhuthala, zomwe zimapangitsa kuti mpweya womwe uli pansi pa dontho usunthire mbali imodzi.
Pogwiritsa ntchito zomwe adaziwona, gululi linapanga chitsanzo chatsopano cha hydrodynamic chomwe chimaneneratu bwino momwe madontho amayendera kudzera m'mitsempha yamagazi yokhala ndi zokutira zosiyanasiyana za superhydrophobic. Ndi ntchito yowonjezera, zomwe adapeza zitha kuyambitsa njira zatsopano zopangira zida zazing'ono zamadzimadzi zomwe zimatha kugwira ntchito ndi mankhwala ovuta komanso mankhwala.
Physics World ikuyimira gawo lofunika kwambiri la ntchito ya IOP Publishing yolankhulana ndi kafukufuku wapadziko lonse lapansi komanso zatsopano kwa omvera ambiri momwe angathere. Tsambali ndi gawo la pulogalamu ya Physics World, yomwe imapereka chithandizo chazidziwitso pa intaneti, digito ndi zosindikiza kwa gulu la asayansi padziko lonse lapansi.