Nqi sawv los ntawm ntau tshaj 15%, thiab PVDF daim nyias nyias rau PV backsheets sawv nyob rau hauv lub off-lub caij
Apr 28, 2018
Tsis ntev los no, tus nqi ntawm PVDF lub hnub rau photovoltaic backsheets tau nce ntawm 15 mus rau 18% nyob rau hauv lub Plaub Hlis qis caij ntawm PV lag luam xav tau.
Nyob hauv cov lus teb, PVDF membrane tuam txhab thiab cov chaw muag khoom nram qab no tau teev tias: "Vim li cas qhov kev nce nqi yog vim cov nqi khoom raw ntawm R142b (1.8 ntu ntawm R142b mus rau 1 feem ntawm PVDF) thiab kev loj hlob sai ntawm lithium roj teeb kev lag luam Lithium kev lag luam hauv xyoo 2017). Nrog ib qho kev nce ntawm 34%, ob qho tib si thov rau PVDF cob sau, ua rau txo tus hauv PVDF cob roj nyob hauv kev lag luam PV. "
Raws li kev txheeb cais, tus nqi yuav ntawm PVDF resin nyob rau hauv lithium roj teeb kev lag luam yog ob zaug ntawm qhov kev lag luam photovoltaic.
Txij thaum Suav tsoom fwv kos npe rau "Montreal Protocol" los ua kom muaj kev cog lus rau kev tsim tawm thiab kev siv HCFCs, qhov theem pib tawm yuav tsom mus rau R22, R141b thiab R142b khoom, thiab kev tsim cov HCFCs quota. Muab piv rau 2013 kev tsim thiab kev noj haus ntau, Tuam Tshoj yuav tsum xav kom tawm theem 35% los ntawm 2020 thiab tshem tawm tag nrho HCFC kev tsim thiab kev siv los ntawm 2030.
Yog li ntawd, qhov kev pov npav raug cuam tshuam los ntawm lub hoobkas hauv kev tiv thaiv ntawm lub teb chaws tswj txoj cai. Yog li ntawd, cov khoom ntawm R142b ntawm kev ua lag luam ua nce zawm. Tus ex-factory price ntawm R142b yog los ntawm 14,500 yuan / T nyob rau hauv Lub Kaum Hlis 2017, thiab tus nqi tiav nce mus rau 19,500 mus rau 20,000 yuan / hli hauv lub Peb Hlis 2018. T, nce 34%, HF thiab R142b cov nqi hloov yog pom hauv daim duab 2.
PVDF tag nrho lub npe ntawm polyvinylidene fluoride, yog ib tug dawb crystalline polymer, ntom nti 1.17 ~ 1.79g / cm3, melting point 172 ° C, siv ntev ntev 40 ~ 150 ° C, decomposition kub 316 ° C. Vim tias qhov PVDF resin muaj ntau tus CF bonds, thiab qhov kev txiav txim ntawm cov tshuaj fluorine-muaj thiab lwm yam tsis-fluorine-pawg hauv molecule, PVDF zoo tshaj hauv cov huab cua, kev tiv thaiv kev kub ntxhov, kev kub siab, thiab oxidation kuj. lub ntsiab yog vim li cas:
Weatherability - PVDF muaj huab cua zoo heev, tsis tshua muaj zog tiv taus UV thiab cov cua kub hnyiab;
Tig nplaim hluav taws xob - limiting oxygen index ntawm 44%, tua tus kheej, pa hluav taws xob ntawm UL94 V-0;
Tshuaj lom neeg tsis haum - tsis tshua muaj zog rau corrosion los ntawm muaj zog acids, alkalis thiab ntsev tshuaj;
Hluav taws xob kev ua tau zoo - lub caij ntim ntawm 7 * 10-30C.m, tam sim no feem ntau cov piezoelectric polymer;
Mechanical Properties-PVDF yog lub siab tshaj plaws lub dag zog fluororesin, thiab nws lub zog tensile yog 4 lub sij hawm ntawm PTFE.
Nyob rau hauv 1948, PVDF cob yog thawj coj los ntawm T-FORD. PVDF resin tau txais los ntawm polymerization ntawm vinylidene fluoride (VDF) monomer ntawm lub siab ntawm 30MPa los yog ntau dua thiab 20 txog 250 ° C. Kev npaj ntawm PVDF tsuas yog muaj xws li emulsion polymerization thiab tshem tawm polymerization.
Tam sim no, lub ntiaj teb PVDF resin ntau lawm muaj peev xwm yog kwv yees li ntawm 50,000 tons, tau faib tawm hauv Asfablivkas (60%), Tebchaws Europe (20%) thiab North America (20%). Nws yog thib ob tsuas yog PTFE, qhov loj tshaj plaws fluoroplastic thib ob, thiab tau dav siv nyob rau hauv industrial processes. Daim ntawv thov (lub ntsiab lag luam yog qhia nyob rau hauv Xam 3).
Nrog nws cov kev ua tau zoo, cov khoom loj loj, thiab cov nqi tsawg dua nrog lwm cov khoom siv roj fluorine, PVDF tau ua ntau xyoo dhau los ntawm txoj kev loj hlob thiab tau nyob hauv lub lag luam loj loj hauv kev lag luam photovoltaic qhov chaw lag luam.
Ntxiv nrog rau PVDF membrane (polyvinylidene fluoride), PVF membrane (polyvinyl fluoride), ETFE membrane (ethylene-tetrafluoroethylene copolymer), ECTFE membrane (ethylene-vinylidene fluoride copolymer), THV membrane (tetrafluoroethylene-Fluorinated cov khoom xws li hexafluoropropylene-vinylidene fluoride copolymer ) kuj yog cov ntaub ntawv tiv thaiv huab cua zoo heev, thiab tuaj yeem ua tau raws li cov kev cai rau sab nraum zoov siv rau 25 xyoo. Txawm li cas los xij, vim tias cov ntaub ntawv raw khoom muaj peev xwm thiab tus nqi, nws tsis tau ua ntaub ntawv thov rau cov teev ntawm photovoltaic backsheets. Tam sim no, tsuas yog PVDF thiab PVF dav siv nyob rau hauv kev lag luam photovoltaic backsheet.
Ntawm ntau cov ntaub ntawv, PVDF tau dhau los ua ib qho kev photovoltaic backsheet weathering khoom nyob rau hauv xyoo tsis ntev los no vim nws txoj kev ua haujlwm zoo heev, weatherability, barrier zog, thiab tsis tshua muaj kev lag luam.
Nws yuav tsum hais tias raws li tus nqi ntawm R142b tseem nce siab thiab lithium roj teeb kev lag luam hlob sai, tus nqi ntawm PVDF zaj duab xis yuav mus ntxiv. Cuam tshuam los ntawm cov nqi no, qee cov tuam txhab tau pib txiav cov kev txiav nyiaj los txo cov nqi.
Raws li cov txheej txheem tiv thaiv txheej txheem ntawm cov qauv, cov PVDF zaj yeeb yam plays lub luag haujlwm tseem ceeb hauv kev siv lub sijhawm ntev. Cov kws tshaj lij nyob hauv txoj kev lag luam tau hu kom tsis txhob ua raws li cov nqi pheej yig vim tias kev nce nqi. Cheebtsam cov tuam txhab yuav tsum xav txog txhua yam. Lub neej ntawm PV modules yog thawj qhov tseem ceeb. PVDF daim nyias nyias nyiaj tsawg tshaj li ntawm 1% ntawm kev tivthaiv cov nqi, tabsis lub neej pabcuam tseemceeb heev.
