Sekuziva kwemunhu wese akambotwasanudza bvudzi rake, mvura muvengi.Bvudzi rakatwasanudzwa zvine simba nekupisa rinobva radzokera mumacurls miniti yarinobata mvura.Sei?Nekuti bvudzi rine chimiro ndangariro.Zvinhu zvayo zvenyama zvinoibvumira kuchinja chimiro mukupindura kune zvimwe zvinokurudzira uye kudzokera kune chimiro chayo chepakutanga mukupindura kune vamwe.
Ko kana zvimwe zvinhu, kunyanya machira, zvine mhando iyi yendangariro yechimiro?Fungidzira t-shirt ine mamhepo ekutonhodza anovhurwa kana akaiswa muunyoro uye akavharwa kana yakaoma, kana imwe saizi-inokodzera-yose zvipfeko zvinotambanuka kana kuderera kune kuyerwa kwemunhu.
Iye zvino, vatsvakurudzi veHarvard John A. Paulson Chikoro cheUinjiniya neApplied Sayenzi (SEAS) vakagadzira zvinhu zvinopindirana nezvinhu zvinogona kuve 3D-kudhindwa mune chero chimiro uye pre-yakarongwa nereversible shape memory.Nyaya yacho inogadzirwa nekeratin, protein ine fibrous inowanikwa mubvudzi, nzara nemateko.Vatsvagiri vacho vakaburitsa keratin kubva kune yakasara Agora wool inoshandiswa mukugadzira machira.
Tsvagiridzo iyi inogona kubatsira kuedza kwakawanda kudzikisa tsvina muindasitiri yemafashoni, imwe yezvinosvibisa zvakanyanya pasirese.Nechekare, vagadziri vakaita saStella McCarthy vari kufungidzira kuti indasitiri inoshandisa sei zvinhu, kusanganisira makushe.
"Nechirongwa ichi, takaratidza kuti hatigone kudzokorodza makushe chete asi isu tinogona kuvaka zvinhu kubva mumvere dzakadzokororwa dzisina kumbobvira dzafungidzirwa," akadaro Kit Parker, Tarr Family Purofesa weBioengineering uye Applied Physics kuSEAS uye mukuru. munyori webepa.“Zvinoreva kuti zviwanikwa zvirambe zviripo zviri pachena.Neprotein yekeratin yakadzokororwa, tinogona kuita zvakangofanana, kana kuti zvakawanda, kupfuura zvave zvichiitwa nokuveura mhuka kusvika nhasi uye, mukuita kudaro, kuderedza kukanganisa kwezvakatipoteredza kweindasitiri yemachira nemafashoni.”
Tsvagiridzo inoburitswa muNature Materials.
Kiyi yekugonesa keratin yekuchinja chimiro chimiro chayo, akadaro Luca Cera, a postdoctoral shamwari kuSEAS uye wekutanga munyori webepa.
Cheni imwe chete yekeratin yakarongwa kuita chitubu-sechimiro chinonzi alpha-helix.Cheni mbiri idzi dzinomonereka pamwechete kuita chiumbwa chinozivikanwa sekoiri yakamonerwa.Mazhinji eaya akamonerwa makoiri anounganidzwa kuita maprotofilaments uye pakupedzisira ma fiber makuru.
"Kurongeka kwealpha helix uye mubatanidzwa wemakemikari zvisungo zvinopa zvinhu zvese simba uye chimiro chendangariro," akadaro Cera.
Kana faibha yakatambanudzwa kana kuratidzwa kune imwe stimulus, zvimisikidzo zvakaita sechitubu zvinonyungudika, uye zvisungo zvinochinjana kuita mabeta akatsiga.Iyo fiber inoramba iri munzvimbo iyoyo kusvika yamutswa kuti idzoke muchimiro chayo chepakutanga.
Kuratidza maitiro aya, vatsvakurudzi 3D-yakadhindwa keratin mapepa mumhando dzakasiyana-siyana.Vakaronga chimiro chechigarire chechinhu - chimiro icho chichagara chichidzokera kwachiri kana chaitwa - vachishandisa mhinduro yehydrogen peroxide uye monosodium phosphate.
Kamwe ndangariro yaiswa, shiti raigona kurongwa zvakare uye kuumbwa kuita maumbirwo matsva.
Semuenzaniso, rimwe bepa rekeratin rakapetwa kuita origami nyeredzi yakaoma sechimiro chayo chechigarire.Kamwe ndangariro dzaiswa, vaongorori vakanyudza nyeredzi mumvura, kwayakavhurika ikava inogoneka.Vachibva ipapo vakamonera bepa riya ndokuriisa muchubhu.Pakangooma, pepa racho rakavharirwa mukati sechubhu yakagadzikana uye inoshanda.Kuti vadzose maitiro, vanodzorera chubhu mumvura, iyo yakasunungura uye yakapeta zvakare mu origami nyeredzi.
"Iyi-nhanho mbiri maitiro ekudhinda 3D zvinyorwa uye nekuisa zvimiro zvayo zvechigarire zvinobvumira kugadzirwa kwezvimiro zvakaoma chaizvo zvine zvimiro zvekudzika kusvika padanho remicron," akadaro Cera."Izvi zvinoita kuti zvinhu zvikodzere kune akati wandei mashandisirwo kubva kumachira kuenda kune tishu engineering."
"Kunyangwe uri kushandisa mafiibhi akadai kugadzira mabhurazi ane saizi yemukombe uye chimiro chinogona kugadzirwa zuva rega rega, kana kuti uri kuyedza kugadzira machira ekurapa ekurapa, mikana yebasa raLuca yakakura uye inonakidza," akadaro Parker."Tiri kuenderera mberi nekufungidzira machira nekushandisa mamorekuru ehuinjiniya seasati amboshandiswa."
Nguva yekutumira: Sep-21-2020