Tsis ntev los no, Prof. Cheng Qunfeng los ntawm University of Aeronautics thiab Astronautics University thiab pab neeg ntawm Ray Bowman ntawm University of Texas hauv Dallas tau txais kev pabcuam hauv chav tsev sov π-π conjugate nyiaj thiab cov ntawv cog lus cog lus kev sib txuas ntawm kev sib txuas los ua ib tus super muaj zog, super nyuaj, siab Coj tus cwj pwm txawv graphene zaj duab xis. Qhov qis qis no, qis kub, kev ua haujlwm zoo siv graphene nanocomposite muaj ntau daim ntawv pom zoo hauv cov aerospace, automotive, yooj ywm hluav taws xob thiab lwm yam kev lag luam, thiab yuav tsum tau hloov cov khoom siv roj ntau cov khoom siv roj.
Nws yog to taub tias cov ntaub ntawv sib txawv thiab muaj zog ntawm cov roj carbon fiber ntau muaj ntau yam kev siv hauv txhua lub neej, tshwj xeeb tshaj yog cov aviation, cov khoom siv tsav tsheb, tsheb thiab cov khoom siv ua kis las.
Txawm li cas los xij, muaj ntau yam tsis zoo nyob rau hauv kev npaj thiab siv cov khoom siv roj: Cov khoom cua hluavtaws yuav tsum muaj qhov kub siab (ntau dua 2500 degrees Celsius), thiab tus nqi yog siab; vim yog qhov tsis muaj zog interfacial, delamination ntawm cov fiber ntau thiab polymer matrix yooj yim; carbon fiber Cov hluav taws xob cov khoom ntawm cov ntaub ntawv puas tsawg thiab tsis tuaj yeem ua tau raws li cov kev xav tau ntawm cov ntawv tshwj xeeb.
Cov khoom siv tshiab tuaj yeem npaj nyob rau hauv chav sov hauv qab 45 degrees Celsius, lub zog zoo ib yam li cov khoom siv roj khov, cov nqi qis qis, thiab nws yog qhov yooj yim kom ua tiav cov kev lag luam. Tsis tas li ntawd, lub zog tensile ntawm cov ntaub ntawv zaj duab xis yog 4.5 npaug ntawm qhov graphene zoo tib yam, thiab lub toughness yog 7.9 npaug ntawm qhov kawg.
Npaj thiab Characterization kev txiav txim siab Crosslinked Graphene Films
Cheng Qunfeng tau nkag siab tias qhov chaw hauv Raman ua rau lub hauv paus ntawm txoj kev nyuaj ntawm kev sib txuas ntawm π-π sib txuas zais cov khoom sib txuas thiab cov kev sib raug zoo sib txuas ntawm molecular scale, uas yog ib qho tseem ceeb rau kev npaj siab ntawm kev ua haujlwm graphene nanocomposites. Cov kev taw qhia theoretical. Nyob rau tib lub sijhawm, cov me me molecularly tau txua crosslinked graphene zaj duab xis kuj muaj cov hluav taws xob muaj hluav taws xob, siab electromagnetic shielding kev ua tau zoo, thiab zoo heev corrosion kuj thiab qaug zog tsis kam.
