Dab tsi ntawm polyether polyol yog siv nyob rau hauv defoamers?
Polyether polyols siv hauv defoamers tsis zoo ib yam li cov siv hauv polyurethane ua npuas ncauj. Lawv tau tsim tshwj xeeb tsim cov khoom siv polyethers uas siv rau hauv cov txheej txheem defoaming los tswj kev ua npuas ncauj, txhim kho ua npuas ncauj, thiab tuav lub sij hawm ntev ua npuas ncauj kev ua haujlwm hauv kev lag luam.
Lub hauv paus ntsiab lus ntawm defoaming yog los rhuav tshem qhov ruaj khov ntawm cov yeeb yaj kiab ua npuas ncauj. Ua npuas ncauj yog tsim thaum muaj roj nyob rau hauv cov kua thiab stabilized los ntawm nto active molecules. Hauv ntau lub tshuab kev lag luam, ua npuas dej ua ib qho teeb meem vim tias nws txo qis kev ua haujlwm, ua rau muaj kev cuam tshuam, thiab cuam tshuam rau cov khoom zoo. Polyether polyols siv nyob rau hauv defoamers pab cuam tshuam qhov ruaj khov ua npuas ncauj qauv los ntawm kev kho qhov nro tus cwj pwm thiab txhim kho theem kev sib raug zoo nyob rau hauv lub defoaming formulation.
Feem ntau siv polyether polyols hauv cov tshuab defoamer yog ethylene oxide thiab propylene oxide raws li copolymer. Cov no yog hu ua EO PO thaiv polyethers. Lawv cov qauv molecular tuaj yeem hloov kho kom tswj tau hydrophilicity thiab hydrophobicity sib npaug. Qhov kev sib npaug no yog qhov tseem ceeb vim tias nws txiav txim siab seb cov khoom puas pab ua npuas ncauj lossis tawg ua npuas ncauj. Hauv kev siv defoaming, feem ntau ntawm cov propylene oxide feem ntau nyiam vim tias nws ua rau muaj kev ua haujlwm ntawm hydrophobic thiab txhim kho ua npuas dej ua haujlwm.
Lwm yam tseem ceeb yog siab propylene oxide cov ntsiab lus polyether polyols. Cov ntaub ntawv no muaj qhov polarity qis dua thiab tsis muaj kev cuam tshuam nrog dej. Yog li ntawd, lawv muaj txiaj ntsig zoo hauv kev txo cov npuas dej ruaj khov hauv cov tshuab aqueous. Lawv tau siv dav hauv kev kho dej hauv kev lag luam, cov txheej txheem fermentation, thiab kev tsim tshuaj lom neeg uas ua npuas dej tsis tu ncua yog qhov teeb meem tshwm sim.
Hloov kho polyether polyols kuj tseem siv rau hauv cov txheej txheem defoamer siab heev. Cov no tuaj yeem suav nrog qhov kawg capped polyethers lossis silicone hloov polyethers. Lub hom phiaj ntawm kev hloov kho yog txhawm rau txhim kho kev sib raug zoo nrog cov roj silicone lossis lwm yam khoom siv defoaming. Silicone raws li defoamers feem ntau tso siab rau cov khoom siv polyether kom ruaj khov dispersion thiab tswj tus cwj pwm tso tawm. Yog tsis muaj kev tsim polyether tsim nyog, lub defoamer yuav cais los yog poob efficiency nyob rau hauv kub los yog siab shear tej yam kev mob.
Hauv cov txheej txheem defoamer, polyether polyols feem ntau tsis yog lub luag haujlwm tseem ceeb ntawm defoaming tus neeg sawv cev. Hloov chaw, lawv ua haujlwm raws li cov khoom txhawb nqa. Lub ntsiab defoaming kev ua si feem ntau yog muab los ntawm silicone roj, hydrophobic hais, los yog ntxhia roj systems. Polyether polyols pab tswj tag nrho cov txheej txheem los ntawm kev tswj kev ruaj ntseg dispersion, kis tus cwj pwm, thiab ua npuas dej ceev. Qhov no txhais tau tias lawv cuam tshuam sai npaum li cas ua npuas ncauj tawg thiab ntev npaum li cas cov nyhuv defoaming kav ntev.
Polyether polyols siv nyob rau hauv defoamers yog dav siv nyob rau hauv industrial teb. Hauv kev kho dej khib nyiab, lawv pab tswj cov npuas dej uas tsim los ntawm surfactants thiab kev ua haujlwm lom neeg. Hauv kev lag luam fermentation xws li tshuaj tua kab mob, cov poov xab, thiab cov amino acid ntau lawm, kev tswj ua npuas ncauj yog qhov tseem ceeb los tswj cov reactor efficiency. Hauv txheej txheej, resins, thiab polymer ntau lawm, defoamers tiv thaiv huab cua nkag thiab qhov tsis xws luag. Lawv kuj siv rau hauv daim ntawv ua thiab textile ua qhov twg ua npuas ncauj tuaj yeem cuam tshuam nrog kev tsim khoom tas mus li.