MUNGAPANGA BWANJI CHIKWANGWANI CHA CARBON?

Ulusi wa kaboni, wopangidwa ndi zinthu zosafanana ndi zinthu (ulusi ndi utomoni), kusinthasintha kwake, kotero, kusinthika, masikweya apakati pa kukongola kwawo. Monga choloŵa m'malo mwachitsulo, zinthu za carbon fiber composites zimapereka kuwirikiza kakhumi mphamvu yachitsulo. Opanga kaboni fiber amapanga zinthu zokhala ndi masikweya ofanana koma osafanana. Mpweya wa kaboni umasiyanasiyana molimba modulus (kapena kuuma komwe kumatsimikiziridwa ngati kusinthika pansi pa kupsinjika) ndi kulimba, kupanikizika ndi kutopa

Lumikizanani nafe

PAN-based carbon fiber ikupezeka masiku ano motsika modulus (osakwana 32 miliyoni lbf/in² kapena Msi), modulus wamba (33 mpaka 36 Msi), modulus wapakatikati (40 mpaka 50 Msi), modulus wamkulu (50 mpaka 70 Msi) ndi ultrahigh modulus zana (70 mpaka 1).
M'mawu osavuta, mpweya wa kaboni umapangidwa ndi kusintha kwa digiri ya organic precursor fiber mu associate degree inert atmosphere pa kutentha kuposa 1800 ° F (982.22 ° C). Kupanga fiber fiber, komabe, kungakhale bizinesi yapamwamba.

Polymerization Ndi Kupota

Polymerization

Njirayi imayamba ndi chakudya chophatikizika chamankhwala chomwe chimatchedwa kalambulabwalo yemwe ali ndi msana wa ma cell a fiber. Masiku ano, pafupifupi 100 peresenti ya carbon fiber yomwe imapangidwa imapangidwa ndi nsalu kapena zoyambira phula, komabe zambiri zimachokera ku polyacrylonitrile (PAN), yopangidwa kuchokera ku nitrite, ndi nitrite imachokera ku mafakitale a propane ndi ammonia.

Childs, kalambulabwalo chiphunzitso akuyamba ndi bwenzi digiri nit rile pawiri kuti pamodzi kwambiri riyakitala ndi plasticized akiliriki co monomer ndi chothandizira ngati asidi, dioksidi, mafuta a vitriol kapena asidi. Kuphatikizika kosalekeza kumapangitsa kuti zosakanizazo ziphatikizidwe, kupanga kusasinthika komanso kuyera, ndikuyambitsa kupanga ma free radicals mkati mwa ma molekyulu a nitrite. Kusintha kumeneku kumabweretsa ndondomeko ya mankhwala, yomwe imapanga ma polima aatali omwe amapangidwa ndi acrylic fibers.Details za ndondomeko ya mankhwala, monga kutentha, mpweya, ma co monomers enieni ndi othandizira, oyenerera. Pambuyo kuchapa ndi kuyanika, nitrite mu mtundu wa ufa amasungunuka mu digiri ya organic zosungunulira monga dim ethyl sulfide (DMSO), dimethylacetamide (DMAC) kapena dimethylformamide (DMF), kapena digiri yamadzi yosungunulira, monga atomiki nambala 30 chloride ndi mchere wa rhodamine. Zosungunulira za organic zimathandizira kupewa kuwononga tinthu tating'ono ting'onoting'ono, zomwe zingawononge kukhazikika kwa njirayo ndikuchedwetsa kutentha kwa ulusi womalizidwa. Pa nthawi imeneyi, ufa ndi zosungunulira kuyimitsidwa kapena kalambulabwalo "❖ kuyanika" ndi kugwirizana kwa madzi. Kusankhidwa kwa zosungunulira motero kuchuluka kwa kasamalidwe koyipa kwa ❖ kuyanika (kupyolera mu kusefera mozama) sikweya muyeso wofunikira kuti apambane gawo lotsatizana la mapangidwe a CHIKWANGWANI.
Kupota
PAN fibers square measure yopangidwa ndi njira yotchedwa wet spinning. Chophimbacho chimamizidwa m'bafa lamadzimadzi lachilengedwe ndikutuluka pabowo pa spinneret yopangidwa kuchokera kumtengo wapatali. Ndimeyi ikugwirizana ndi mitundu yofunikira ya ulusi wa PAN (mwachitsanzo, mabowo 12,000 a 12K carbon fiber). Ulusi wokhuthala komanso wonyezimira wonyezimirawu umakokedwa kudzera pa chogudubuza kuti muchotse chinthu chowonjezera, kenako zowuma ndikutambasula kuti mupitilize kuyang'ana pagulu la PAN. Apa, mawonekedwe ndi mkati mtanda gawo la filaments lalikulu muyeso mtima ndi mmene zosungunulira osankhidwa ndi wothandizira kudutsa kalambulabwalo ulusi, kuchuluka kwa mavuto ntchito, komanso pc elongation wa filaments. Yotsirizirayi ndi yake kwa wopanga aliyense. Njira ina m'malo mwa kupota konyowa ingakhale njira yosakaniza yotchedwa dry blasting/nyowa kupota, yomwe imagwiritsa ntchito kusiyana kwa mpweya pakati pa ulusi ndi bafa lachilengedwe. Izi zimabweretsa chiwongolero chowoneka bwino cha PAN chomwe chimapangitsa kuti fiber / matrix rosin mawonekedwe apangidwe mkati mwa gulu Gawo lomaliza mkati mwa mapangidwe a PAN precursor fibers ndikugwiritsa ntchito mafuta omaliza kuti asiye ma viscous filaments kuti asagwirizane. Ulusi woyera wa PAN wa square muyeso kenaka udzawumitsanso ndi kuponyedwa pa spool.

Oxidation ndi Carbonization

Kuchuluka kwa okosijeni

Ma bobbins masikweya awa amalowetsedwa mudengu, ndipo mkati mwa nthawi yayitali kwambiri, siteji ya oxidization, PAN fibers square muyeso amadyetsedwa kudzera m'ng'anjo zingapo zodzipatulira. Asanalowe m'chipinda choyambirira chakhitchini, ma PAN fibers square measure placate mu chokoka kapena pepala lotchedwa warp. Kutentha kwa chipinda kumayambira 392 °F (pafupifupi 200 °C) mpaka 572 °F (300 digiri Celsius).

Kupewa kutentha kosasunthika (kuyerekeza kwa enthalpy unharness panthawi yonse ya oxidation, yowerengeka pa 2,000 kJ / kilogalamu, kusuntha Choopsa chaziwopsezo), opanga zida za m'khitchini amagwiritsa ntchito kufalikira kwa masitayelo a mpweya kuti athetse kutentha ndi kuwongolera kutentha. Motsogozedwa ndi mankhwala enaake oyambilira, nthawi ya okosijeni ndi yosiyana kotheratu, komabe Littler akuyerekeza kuti chokoka cha 24K chidzasinthidwa pamlingo wa pafupifupi mapazi makumi anayi ndi atatu pa mita khumi ndi zitatu pamphindi pamzere wokulirapo wokhala ndi ng'anjo zingapo za okosijeni. Pomaliza, ma alter (okhazikika) PAN fibers amakhala ndi ma molekyulu a kaboni mazana asanu mpaka makumi asanu ndi limodzi mphambu asanu ndi gasi, kusakanikirana kwa atomiki nambala 7 ndi O.
Carbonization
Mpweya wopangidwa ndi mpweya umachitika mumlengalenga mopanda mpweya (wopanda okosijeni) m'ng'anjo zingapo zopangidwira mwapadera, pang'onopang'ono ndikuwonjezera kutentha. Pamadzi ndi potulutsira chipinda chilichonse, chipinda chowongolera chimalepheretsa kulowerera kwa O chifukwa cha molekyulu iliyonse ya O yomwe imadutsa m'khitchini imachotsa ulusi pang'ono. Izi zitha kuletsa kutayika kwa kaboni wopangidwa pakutentha kotere. Kulibe O, mamolekyu omwe si a carbon, pamodzi ndi pawiri Ndi zinthu zina zosakhazikika (zokhazikika pamlingo wa makumi anayi mpaka makumi asanu ndi atatu ppm) ndi ma particulates (monga tizidutswa tating'ono ta fiber) amachotsedwa ndikutulutsidwa kuchokera ku chipangizo chogwiritsira ntchito kukhitchini kuti akachiritsidwe mung'anjo yoyendetsedwa ndi chilengedwe. carbonisation imayamba mkati mwa chipinda cha kutentha, kusamutsa ulusi ku 1292 °F (pafupifupi 700 °C) kufika 1472 °F (700 °C mpaka 800 °C) ndi kuthera mu chipinda chotentha pa 2192 °F (pafupifupi 1,200 °C) kufika pa 2732 °F (pafupifupi 00 °C 1,5). 1500 ° C). Chiwerengero cha zipinda chimasankhidwa ndi modulus yofunikira mkati mwa carbon fiber; mtengo wamtengo wapatali wa ulusi wa carbon modulus wokwera komanso wosadziŵika umatheka chifukwa cha kupitiriza ndi kutentha komwe kumayenera kukwaniritsidwa ndi ng'anjo yotentha. ngakhale kupitiriza kuli kwaumwini ndipo kalasi iliyonse ya carbon fiber ndi yosiyana kwambiri, kupitiriza kwa okosijeni kumawerengedwera mu maola, komabe kuchuluka kwa carbonisation kumachepetsedwa ndi dongosolo la kukula kwa mphindi. Ulusi ukakhala wosintha, umachepetsa kulemera ndi voliyumu, umafupikitsa kutalika ndi zisanu mpaka 100%, ndikuchepetsa m'mimba mwake. M'malo mwake, kutembenuka kachulukidwe kachulukidwe ka PAN kalambulabwalo wa PAN kaboni CHIKWANGWANI kukukhudza 2: 1 komanso kuthekera kosunthika ndi kocheperako kuposa peyala - ndiye kuti, zinthu zocheperako zimalowa munjira. Izi zidzakulitsa kuchuluka kwa ulusi kuchokera ~ 1.18 g / cc mpaka 1.38 g / cc.

Kuchiza pamwamba ndi kukula kwake

Kuchiza pamwamba ndi kukula kwake
Gawo lotsatira ndilofunika kwambiri pakuchita bwino kwa ulusi, komanso kuwonjezera pa zoyambira, zimasiyanitsa bwino chinthu cham'modzi ndi cha omwe akupikisana nawo. Kulumikizana pakati pa matrix organic pawiri ndipo chifukwa chake ma fiber a kaboni ndi ofunikira kuti alimbikitse gulu; mu njira yonse yopangira kaboni fiber, chithandizo chapamwamba chimapangidwa kuti chiwonjezere kumamatira uku.

Nthawi yotumiza: Nov-01-2018

Kodi mungapange bwanji kaboni fiber?

MUNGAPANGA BWANJI CHIKWANGWANI CHA CARBON?

Polymerization Ndi Kupota

Oxidation ndi Carbonization

Kuchiza pamwamba ndi kukula kwake