Indima ye-DMDEE Catalyst ku-HFO-Stabilized Polyurethane Foam Systems

Ama-hydrofluoroolefins (ama-HFO) avele njengengxenye ebalulekile ekukhiqizweni kwama-polyurethane foam avikelayo, ikakhulukazi ngenxa yokuthi amandla awo okufudumala komhlaba aphansi (i-GWP) uma kuqhathaniswa nama-blowing agents endabuko afana nama-hydrofluorocarbons (ama-HFC) nama-hydrochlorofluorocarbons (ama-HCFC). Kulezi zinhlelo, ukuzinza nokusebenza kwama-polyurethane catalysts kubalulekile ekufezeni izakhiwo ze-foam ezifiselekayo. Phakathi kwama-catalysts asetshenziswa ezinhlelweni ezisekelwe ku-HFO, i-DMDEE (i-Dimethylethanolamine) ivelele ngenxa yokuhambisana kwayo okumangalisayo kanye nokuzinza.

Ukuqinisa Izinhlelo Ezisekelwe ku-HFO

Ama-HFO ayathandwa kakhulu embonini ngenxa yezinzuzo zawo zemvelo kanye nokusebenza kahle kokufakwa kwe-foam. Kodwa-ke, ukungeniswa kwama-HFO ezinhlelweni ze-polyurethane kuletha izinselele ezihlukile, ikakhulukazi maqondana nokuzinza kwama-catalyst. Ama-catalyst endabuko e-amine angabonisa ukuzinza okunciphile ezinhlelweni ezisekelwe ku-HFO, okuholela ekungahambelani kwekhwalithi nokusebenza kwe-foam. Yilapho-keI-DMDEEidlala indima ebalulekile.

I-DMDEE yaziwa ngomsebenzi wayo we-amine onciphile, okwenza iqine kakhulu uma isetshenziswa ezinhlelweni ze-polyurethane ezisekelwe ku-HFO. Lokhu kuzinza kubalulekile ekuqinisekiseni ukukhiqizwa kwe-foam okuqhubekayo, njengoba kuvimbela ukusabela kwangaphambi kwesikhathi okungalimaza isakhiwo se-foam kanye nezakhiwo zokuvikela. Ukuhambisana kwe-DMDEE nama-HFO kuqinisekisa ukuthi ihlala isebenza kuyo yonke inqubo yokukhipha i-foam, okunegalelo ekwakhiweni kweseli okufanayo kanye nokusebenza kahle kokuvikela.

Ukusetshenziswa Okubanzi Ku-HFO-StabilizedI-CatalystIzixazululo

Ukuzinza kwe-DMDEE nama-HFO kuholele ekwamukelweni kwayo kabanzi cishe kuzo zonke izixazululo ze-catalyst ezisekelwe ku-HFO. Kusebenza kahle kakhulu ekugcineni ibhalansi phakathi kokusabela kokuvunguza nokwelapha, okubaluleke kakhulu ekufezeni i-foam esezingeni eliphezulu enezakhiwo ezinhle kakhulu zokushisa. Umsebenzi we-amine oncishisiwe we-DMDEE awugcini nje ngokuthuthukisa ukuzinza kwayo kodwa futhi unegalelo ekulungisweni kahle kwephrofayili yokusabela kwe-foam, ukuqinisekisa inqubo yokugqwala ebushelelezi nelawulwayo.

Ama-Ejenti Okuvuthela Ekukhiqizweni Kwe-Polyurethane Foam

Ngaphezu kwama-HFO, kusetshenziswa ezinye izinto zokuphefumula ezahlukahlukene ekukhiqizweni kwama-polyurethane foam, okuhlanganisa ama-HFC, ama-HCFC, amafomethi, ama-ketone (njenge-acetone), nama-hydrocarbon. Ngayinye yalezi zinto inezici zayo ezingathonya ukukhethwa kwama-catalyst. Kodwa-ke, ezinhlelweni ezisekelwe ku-HFO, ukusetshenziswa kwe-DMDEE sekuyinto ebaluleke kakhulu ngenxa yokuzinza nokusebenza kwayo okungenakuqhathaniswa.

Ekuphetheni, i-DMDEE catalyst idlala indima ebalulekile ekuqiniseni izinhlelo ze-polyurethane ezisekelwe ku-HFO, iqinisekisa ikhwalithi ye-foam eqhubekayo kanye nokusebenza okuthuthukisiwe kokufakwa kokushisa. Ukuhambisana kwayo nama-HFO kuyenza ibe yingxenye ebalulekile ezixazululweni zokufakwa kokushisa zesimanje nezinobungani nemvelo.