Raws li leej twg tau ncaj lawv cov plaub hau paub, dej yog yeeb ncuab.Cov plaub hau mob siab ncaj ncaj los ntawm tshav kub yuav rov qab mus rau hauv curls lub feeb nws kov dej.Vim li cas?Vim cov plaub hau muaj lub cim xeeb zoo.Nws cov khoom siv tso cai rau nws hloov cov duab hauv kev teb rau qee qhov stimuli thiab rov qab mus rau nws cov duab qub hauv kev teb rau lwm tus.
Yuav ua li cas yog tias lwm yam ntaub ntawv, tshwj xeeb tshaj yog textiles, muaj hom zoo li no nco?Xav txog lub tsho t-shirt nrog lub qhov cua txias uas qhib thaum raug cov dej noo thiab kaw thaum qhuav, los yog ib-size-fits-tag nrho cov khaub ncaws uas stretches los yog shrinks rau ib tug neeg qhov kev ntsuas.
Tam sim no, cov kws tshawb fawb ntawm Harvard John A. Paulson Lub Tsev Kawm Ntawv ntawm Engineering thiab Applied Sciences (SEAS) tau tsim cov khoom siv biocompatible uas tuaj yeem ua 3D-luam tawm rau hauv ib qho duab thiab pre-programmed nrog reversible zoo nco.Cov khoom siv yog tsim los ntawm keratin, fiber ntau protein nyob rau hauv cov plaub hau, rau tes thiab plhaub.Cov kws tshawb fawb tau rho tawm cov keratin los ntawm cov khoom qub Agora wool siv hauv textile manufacturing.
Cov kev tshawb fawb no tuaj yeem pab txoj kev siv dav dav ntawm kev txo cov pov tseg hauv kev lag luam zam, ib qho ntawm cov pa phem loj tshaj plaws hauv ntiaj teb.Twb tau, cov neeg tsim qauv xws li Stella McCarthy tau rov xav txog tias kev lag luam siv cov ntaub ntawv li cas, suav nrog cov ntaub plaub.
Kit Parker, Tarr Family Professor ntawm Bioengineering thiab Applied Physics ntawm SEAS hais tias "Nrog rau txoj haujlwm no, peb tau pom tias tsis yog peb tuaj yeem rov ua dua ntaub plaub xwb tab sis peb tuaj yeem tsim cov khoom tawm ntawm cov ntaub plaub uas tsis tau xav txog ua ntej," tus sau ntawv."Qhov cuam tshuam rau kev ruaj khov ntawm cov peev txheej ntuj yog qhov tseeb.Nrog rau cov khoom siv rov ua dua tshiab keratin, peb tuaj yeem ua ntau npaum li cas, lossis ntau dua, tshaj li qhov tau ua los ntawm kev txiav cov tsiaj mus rau hnub tim thiab, ua li ntawd, txo qhov cuam tshuam ib puag ncig ntawm kev lag luam textile thiab zam. "
Kev tshawb fawb tau luam tawm hauv Nature Materials.
Tus yuam sij rau keratin lub peev xwm hloov pauv yog nws cov qauv hierarchical, hais tias Luca Cera, tus kws tshaj lij ntawm SEAS thiab thawj tus sau ntawv.
Ib txoj hlua ntawm keratin tau npaj rau hauv lub caij nplooj ntoos hlav zoo li lub npe hu ua alpha-helix.Ob tug ntawm cov chains twist ua ke los tsim ib tug qauv hu ua ib tug coiled kauj.Ntau ntawm cov coiled coils tau sib sau ua ke rau hauv cov khoom siv hluav taws xob thiab thaum kawg loj fibers.
"Lub koom haum ntawm alpha helix thiab cov tshuaj sib txuas ua ke muab cov khoom siv ob qho tib si lub zog thiab lub cim xeeb," Cera hais.
Thaum cov fiber ntau yog ncab los yog raug rau ib qho kev txhawb nqa, cov qauv zoo li lub caij nplooj ntoos hlav uncoil, thiab cov ntawv cog lus rov qab los ua cov ntawv ruaj khov beta.Cov fibers tseem nyob hauv txoj haujlwm ntawd kom txog thaum nws tau ua kom coil rov qab rau hauv nws qhov qub.
Txhawm rau ua kom pom cov txheej txheem no, cov kws tshawb nrhiav 3D-luam ntawv keratin hauv ntau hom duab.Lawv tau npaj cov khoom siv mus tas li - cov duab nws yuav nco ntsoov rov qab los thaum tshwm sim - siv cov tshuaj hydrogen peroxide thiab monosodium phosphate.
Thaum lub cim xeeb tau teeb tsa, daim ntawv tuaj yeem rov kho dua thiab molded rau hauv cov duab tshiab.
Piv txwv li, ib daim ntawv keratin tau muab tais rau hauv lub hnub qub origami complex raws li nws cov duab tas mus li.Thaum lub cim xeeb tau teeb tsa, cov kws tshawb fawb tau dunked lub hnub qub hauv dej, qhov chaw nws nthuav tawm thiab ua tau yooj yim.Los ntawm qhov ntawd, lawv dov daim ntawv rau hauv ib lub raj nruj.Thaum qhuav, daim ntawv tau muab xauv rau hauv qhov chaw ruaj khov thiab ua haujlwm zoo.Txhawm rau thim rov qab cov txheej txheem, lawv muab lub raj rov qab rau hauv dej, qhov chaw uas nws unrolled thiab folded rov qab rau hauv lub hnub qub origami.
"Cov txheej txheem ob-kauj ruam ntawm 3D luam ntawv cov khoom siv thiab tom qab ntawd teeb tsa nws cov duab tas mus li tso cai rau kev tsim cov duab zoo nkauj nrog cov qauv tsim qis mus rau qib micron," Cera hais."Qhov no ua rau cov khoom tsim nyog rau ntau yam kev siv los ntawm textile mus rau cov ntaub so ntswg engineering."
"Txawm hais tias koj tab tom siv cov fibers zoo li no los ua brassieres uas lub khob loj thiab cov duab tuaj yeem hloov kho txhua hnub, lossis koj tab tom sim ua cov khoom siv rau kev kho mob, qhov ua tau ntawm Luca txoj haujlwm yog qhov dav thiab zoo siab," said Parker."Peb tab tom txuas ntxiv rov xav txog cov ntaub ntawv los ntawm kev siv cov roj ntsha molecules ua cov khoom siv hluav taws xob zoo li lawv tsis tau siv ua ntej."
Post lub sij hawm: Sep-21-2020