Li-hydrofluoroolefin (li-HFO) li hlahile e le karolo ea bohlokoa tlhahisong ea li-polyurethane foam tse sireletsang mocheso, haholo-holo ka lebaka la bokhoni ba tsona bo tlase ba ho futhumala ha lefatše (GWP) ha li bapisoa le li-blowers tsa setso tse kang li-hydrofluorocarbons (li-HFC) le li-hydrochlorofluorocarbons (li-HCFC). Litsamaisong tsena, botsitso le ts'ebetso ea li-catalyst tsa polyurethane li bohlokoa ho fihlelleng thepa e lakatsehang ea foam. Har'a li-catalyst tse sebelisoang litsamaisong tse thehiloeng ho HFO, DMDEE (Dimethylethanolamine) e hlahella ka lebaka la ho lumellana ha eona le botsitso bo ikhethang.
Ho Tsitsisa Mekhoa e Thehiloeng ho HFO
Li-HFO li ntse li ratoa haholo indastering ka lebaka la melemo ea tsona ea tikoloho le ts'ebetso e atlehang ea ho kenya foam ka har'a li-insulation. Leha ho le joalo, ho kenngoa ha li-HFO lits'ebetsong tsa polyurethane ho baka liphephetso tse ikhethang, haholo-holo mabapi le botsitso ba li-catalyst. Li-catalyst tsa setso tsa amine li ka bontša botsitso bo fokotsehileng lits'ebetsong tse thehiloeng ho HFO, e leng se lebisang ho se lumellaneng ha boleng ba foam le ts'ebetso. Mona ke mooDMDEEe bapala karolo ea bohlokoa.
DMDEE e tsebahala ka ho fokotseha ha ts'ebetso ea eona ea amine, e leng se etsang hore e tsitse haholo ha e sebelisoa lits'ebetsong tsa polyurethane tse thehiloeng ho HFO. Ho tsitsa hona ho bohlokoa bakeng sa ho netefatsa tlhahiso e tsitsitseng ea foam, kaha e thibela liketso tse sa lebelloang tse ka senyang sebopeho sa foam le thepa ea ho thibela ho ruruha. Ho lumellana ha DMDEE le HFO ho netefatsa hore e lula e le mafolofolo nakong eohle ea ts'ebetso ea ho ntša foam, e tlatsetsang sebopehong se tšoanang sa sele le ts'ebetso e ntle ea ho thibela ho ruruha.
Tšebeliso e Akaretsang ho HFO-StabilizedSehokeloLitharollo
Ho tsitsa ha DMDEE le li-HFO ho lebisitse ho amoheloeng ha eona hohle hoo e ka bang tharollong e 'ngoe le e 'ngoe ea li-catalyst tse thehiloeng ho HFO. E sebetsa haholo-holo ho bolokeng tekano lipakeng tsa liketso tsa ho foka le ho folisa, e leng habohlokoa bakeng sa ho fihlela foam ea boleng bo holimo e nang le litšobotsi tse ntle tsa ho thibela mocheso. Tšebetso e fokotsehileng ea amine ea DMDEE ha e ntlafatse botsitso ba eona feela empa hape e kenya letsoho ho lokisoeng ha boemo ba karabelo ea foam, ho netefatsa ts'ebetso e boreleli le e laoloang ea ho foa.
Lisebelisoa tsa ho Foametsa Tlhahisong ea Foam ea Polyurethane
Ntle le li-HFO, ho sebelisoa li-agent tse ling tse fapaneng tsa ho foka tlhahisong ea li-foam tsa polyurethane, ho kenyeletsoa li-HFC, li-HCFC, li-formates, li-ketone (tse kang acetone), le li-hydrocarbon. Sehlahisoa se seng le se seng sa tsena se na le sete ea sona ea litšobotsi tse ka susumetsang khetho ea li-catalyst. Leha ho le joalo, lits'ebetsong tse thehiloeng ho HFO, ts'ebeliso ea DMDEE e se e batla e le ea bohlokoa ka lebaka la botsitso le ts'ebetso ea eona e sa bapisoeng.
Qetellong, DMDEE catalyst e bapala karolo ea bohlokoa ho tsitsiseng litsamaiso tsa polyurethane tse thehiloeng ho HFO, e netefatsa boleng bo tsitsitseng ba foam le ts'ebetso e ntlafalitsoeng ea ho thibela ho ruruha. Ho lumellana ha eona le li-HFO ho e etsa karolo ea bohlokoa litharollong tsa sejoale-joale tsa ho thibela ho ruruha tse mosa tikolohong.
Nako ea poso: Phato-26-2024