Nyob rau hauv kev npaj ntawm thermoplastic carbon fiber, kev lag luam feem ntau siv cov plaub sizing agents.

Txhawm rau txhim kho kev sib raug zoo ntawm sizing tus neeg sawv cev nrog cov thermoplastic resin-based composites, kev lag luam tau tshawb fawb ntau ntawm ntau yam tshiab sizing tus neeg sawv cev rau cov thermoplastic resins sib txawv, aiming kom ua tiav cov qauv zoo sib xws thiab muaj kev sib cuam tshuam ntawm cov sizing agents thiab cov thermoplastic resins. . Tom qab ntau qhov kev sim thiab cov ntaub ntawv sib piv, nws tau pom tias plaub tus neeg sawv cev hauv qab no yog qhov tshwj xeeb: polyamide (PA), polyurethane (PU), polyarylether, thiab polyimide (PI).

1.Polyamide (PA) Sizing Agent

Polyamide (PA), tseem hu ua nylon, muaj tshuaj lom neeg ruaj khov, hnav tsis kam, thiab cov khoom siv kho tshuab. Nws yog feem ntau siv nyob rau hauv tshwj xeeb fibers, engineering plastics, thiab thermoplastic resin-raws li composite matrix resins. Raws li PA tau dav siv los ua cov matrix resin rau cov khoom siv thermoplastic resin-raws li cov khoom sib xyaw, xaiv PA ua ib feem ntawm tus neeg sawv cev sizing tuaj yeem txhim kho qhov sib txuam sib luag ntawm cov thermoplastic resin-based composites.

Ib qho hnyav-raws li tus neeg saib xyuas tau npaj los ntawm kev hloov pauv PA hauv polyols thiab siv rau de-sized T300 carbon fiber. Qhov no coj mus rau fabrication ntawm CF / PA66 composites. Qhov zoo sib xws ntawm tus neeg sawv cev sizing thiab nylon 66 matrix resin ua rau muaj kev sib koom ua ke ntawm cov tshuaj sib txuas thiab lub cev adsorption, ua tiav kev txhim kho lub zog tensile thiab cuam tshuam lub zog ntawm cov khoom sib xyaw los ntawm 40.87% thiab 43.59%, feem.

Txawm li cas los xij, txoj kev no yuav tsum muaj cov kuab tshuaj organic ntau, ua rau muaj kev hem thawj rau ib puag ncig thiab kev nyab xeeb ntawm kev tsim khoom, thiab kev siv lub zog rau ziab cov kuab tshuaj yog qhov tseem ceeb. Yog li ntawd, lub hom phiaj ntawm PA sizing tus neeg saib xyuas kev tshawb fawb yog maj mam hloov mus rau ntau tus phooj ywg environmentally water-based sizing agent systems. Tam sim no, tau txais kev ruaj khov PA emulsions siv cov surfactants thiab npaj PA aqueous sizing agents los ntawm kev hloov kho hydrophilic yog txoj hauv kev paub ntau dua.

2.Polyurethane (PU) Sizing Agent

Polyurethane (PU) nthuav tawm zoo sib xws thiab kev sib koom ua ke lub zog nrog ntau yam thermoplastic resins vim nws cov qauv tshuaj tshwj xeeb, ua rau nws siv tau los ua tus neeg sawv cev sizing. Los ntawm leveraging qhov zoo sib xws thiab compatibilities ntawm lub urethane thiab carbonate lug, PU yuav siv tau raws li ib tug sizing tus neeg sawv cev rau sizing lub fibers nyob rau hauv carbon fiber (CF) / thermoplastic polycarbonate (PC) composites los ntawm ib tug hnyav txoj kev.

Lub thermal stability ntawm polyurethane (PU) sizing tus neeg saib xyuas yog zoo heev; nws pib poob phaus tsuas yog thaum kub txog 270 degree. Qhov no tso cai rau kev sib txuas tshuaj nrog cov qauv carbonate hauv polycarbonate (PC) matrix, uas ua rau muaj kev nce hauv interlaminar shear zog ntawm cov khoom sib xyaw los ntawm 38.1 MPa rau 62.9 MPa, sawv cev rau 65% kev txhim kho.

Txawm li cas los xij, nrog kev nce ntxiv ntawm cov teeb meem ib puag ncig, cov kuab tshuaj raws li PU sizing cov neeg ua haujlwm tau maj mam hloov los ntawm cov dej-raws li tus neeg sawv cev. Emulsion dispersion yog ib txoj hauv kev siv los npaj cov dej-raws li PU sizing agents. Dej-raws li emulsion PU sizing cov neeg ua haujlwm tuaj yeem khaws cia txog li rau lub hlis nyob rau hauv qhov kub thiab txias kom qhuav, nrog rau qhov kub ntawm 280-300 degree, uas tuaj yeem nce lub zog interlaminar shear zog ntawm CF / PA66 composites mus txog 78 MPa, ua kom pom ntau dua. kev txhim kho tseem ceeb.

Polyarylether Sizing Agent

Polyarylethers yog cov polymers uas muaj cov nplhaib uas muaj ntxhiab thiab ether txuas. Cov piv txwv zoo xws li polyether ether ketone (PEEK), polyphenylene sulfide (PPS), thiab polyethersulfone (PES). Cov benzene rings nruj thiab hloov tau yooj yim ether linkages endow cov ntaub ntawv nrog zoo heev mechanical thiab thermal zog, thaum tseem tso cai rau qee lub tshuab ua crystalline, ua kom siv tas li nyob rau hauv qhov kub thiab txias. Lawv tau siv dav hauv kev ua haujlwm siab engineering plastics thiab thermoplastic resins hauv aerospace, electronics, zog, thiab kev kho mob.

Txawm li cas los xij, cov qauv nruj thiab ruaj khov ntawm polyarylethers, thaum muab ntau qhov zoo, kuj tseem ua rau nws nyuaj rau lawv kom hnov ​​​​mob nrog lwm pab pawg, ua rau tsis muaj zog interfacial bonding nrog carbon fibers (CF). Yog li ntawd, kev hloov kho polyarylether systems thiab npaj cov neeg sawv cev sizing los txhim kho lawv cov kev sib raug zoo nrog CF thiab thermoplastic matrices tau dhau los ua qhov teeb meem tseem ceeb. Kev kho cov kua qaub muaj zog yog ib txoj hauv kev zoo rau kev qhia cov pab pawg ua haujlwm rau hauv polyarylether molecules.

Los ntawm kev siv cov tshuaj sulfonation, sodium sulfonate cov qauv (−SO3Na) tau nkag mus rau hauv PEEK system los npaj tus neeg sawv cev sizing. Cov pab pawg sulfonic tuaj yeem tsim cov ntawv cog lus hydrogen nrog cov pab pawg ntawm cov khoom siv fiber ntau, thiab tus neeg sawv cev sizing yog sib xws nrog PEEK matrix, ua kom yooj yim rau ntub dej thiab infiltration ntawm matrix resin rau hauv CF. Lub zog interlaminar shear lub zog ntawm cov khoom sib xyaw tau mus txog 78.2 MPa.

Tsis tas li ntawd, ib qho hnyav-raws li hybrid sizing tus neeg sawv cev tau npaj los ntawm kev hloov kho graphene oxide (GO) nrog cov qauv diamine zoo ib yam li polyethersulfone (PES), uas tsis yog tsuas yog qhia txog cov amino pawg nquag tab sis kuj txhim kho thermal stability ntawm lub cev. Ntau yam kev sib cuam tshuam xws li kev sib txuas tshuaj, hydrogen bonding, polar attraction, van der Waals rog, thiab mechanical interlocking tuaj yeem ua tiav kev sib raug zoo ntawm tus neeg sawv cev sizing, GO, CF, thiab PES matrix, ua rau 74.1% kev txhim kho hauv cov khoom sib txuas. ntawm CF/PES composites.

4.Polyimide (PI) Sizing Agent

Polyimides (PI) yog cov polymers ua haujlwm siab uas muaj cov nplhaib imide hauv lawv cov pob txha molecular. Lawv muaj cov qauv saw hlau nruj heev thiab cov khoom siv kho tshuab zoo heev, ua rau lawv yog ib qho ntawm cov khoom siv polymer siab tshaj plaws. PIs tau pom cov ntawv thov dav dav hauv aerospace, khoom siv tub rog, kev sib txuas lus hauv hluav taws xob, thiab lwm yam. Ntawm cov no, polyether imide (PEI) sizing tus neeg sawv cev, uas muaj cov ether hloov tau yooj yim, tau txais kev saib xyuas ntau nyob rau hauv xyoo tas los no raws li qhov kub thiab txias sizing tus neeg sawv cev vim lawv qhov tshwj xeeb thermal stability, txhim kho yooj, zoo solubility, thiab compatibility nrog thermoplastic resins.

PI sizing cov neeg ua haujlwm tuaj yeem tiv taus qhov kub thiab txias, ua tau raws li cov pwm molding thiab kev siv rau kev ua haujlwm siab thermoplastic resin-based composites (xws li CF / PES thiab CF / PEEK composites). Txawm li cas los xij, zoo ib yam li polyarylether sizing tus neeg sawv cev, qhov nruj thiab ruaj khov molecular qauv ntawm PI sizing cov neeg ua haujlwm ua rau muaj peev xwm sib txuas nrog cov pa roj carbon fibers (CF) thiab kev ua haujlwm tsis zoo, yuav tsum tau hloov kho tshuaj.

Kev hloov pauv ntawm PI sizing tus neeg sawv cev tau ua tiav siv nanoparticles los ntawm dispersing multi-walled carbon nanotubes (MWCNT) rau hauv dichloromethane tov ntawm PEI. Siv cov txheej txheem hnyav, qhov saum npoo ntawm T300 qib CF ntaub tau kho. Kev tshawb fawb pom tias MWCNT nyob rau hauv cov neeg sawv cev sib xyaw ua ke tau zoo qhia ntau pawg neeg nquag thiab tuaj yeem npog cov fiber ntau. Tom qab sizing, imide rings hauv PEI tuaj yeem tsim kev sib cuam tshuam ntawm polar thiab hydrogen bonds nrog hydroxyl thiab carboxyl pawg ntawm MWCNT nto, thaum π-π stacking kev sib cuam tshuam tshwm sim ntawm cov nplhaib ntawm MWCNT thiab PEEK matrix resin. Qhov kev hloov kho no cuam tshuam kev tawg tawg, thaum kawg ua rau lub zog interlaminar shear zog ntawm 90.7 MPa rau cov khoom sib xyaw.

Hais lus nruj me ntsis, polyamide (PA), polyurethane (PU), polyarylether, thiab polyimide (PI) sawv cev rau plaub pawg ntawm cov neeg ua haujlwm sizing, txhua tus tsim rau ntau hom thermoplastic resins. Cov tshuab sizing tus neeg sawv cev no feem ntau tau hloov kho ntau yam thaum siv los txhim kho cov yam ntxwv ntawm cov thermoplastic carbon fiber ntau. Tsis tas li ntawd, nws yog ib qho tseem ceeb los txiav txim siab seb cov txheej txheem kev sim yuav ua rau muaj kev cuam tshuam tsis zoo rau ib puag ncig. Txhawm rau nrhiav cov kev daws teeb meem zoo tshaj plaws, ntau tus kws tshaj lij thiab cov kws tshawb fawb hauv tebchaws thiab thoob ntiaj teb tau sib zog los txheeb xyuas cov kev tsim nyog tshaj plaws.