Ethylene glycol thiab glycerol sib txawv hauv cov qauv molecular, nrog ethylene glycol muaj 2 pawg hydroxyl (C₂H₆O₂), thaum glycerol muaj 3 pawg hydroxyl (C₃H₈O₃), uas ua rau cov khoom sib txawv ntawm lub cev thiab kev lag luam. Kab lus no sib piv ethylene glycol thiab glycerol nyob rau hauv cov nqe lus ntawm cov qauv molecular, cov khoom tseem ceeb, thiab cov tswv yim siv hauv kev ua kom khov, tshuaj pleev ib ce, thiab zaub mov kev lag luam, suav nrog kev siv qib ethylene glycol, kev siv tshuaj tua kab mob ethylene glycol, thiab cov khoom siv tshuaj lom neeg ntau rau cov neeg yuav khoom.
Qhov sib txawv ntawm ethylene glycol thiab glycerol
Basic Chemical Distinction
Ethylene glycolyog abbreviated li MEG. Nws cov mis molecular yog C₂H₆O₂, nrog ob pawg hydroxyl, teej tug mus rau dihydric cawv. Nws yog dav paub nyob rau hauv kev ua lag luam raws li ethylene glycol (CAS 107-21-1) industrial qib tshuaj siv rau loj-scale ntau lawm.
Glycerol tseem hu ua glycerin. Nws cov mis molecular yog C₃H₈O₃, muaj peb pawg hydroxyl, uas ua rau nws muaj trihydric cawv.
Lawv qhov hnyav molecular, viscosity, khov taw tes, thiab toxicity yog txawv, uas ncaj qha txiav txim siab lawv cov xwm txheej sib txawv hauv cov khoom siv raw khoom thiab cov khoom lag luam.
Qhov sib txawv ntawm lub cev & tshuaj lom neeg
Ethylene glycol muaj qhov txias txias ntawm -12.9 degree. Nws muaj zog fluidity thiab tsis tshua muaj viscosity, ua rau nws haum rau ethylene glycol antifreeze coolant formulations thiab tshav kub hloov kua siv.
Nws kuj muaj peev xwm ua kom kub ceev ceev, tab sis nws muaj qhov tseeb toxicity thiab tsis tuaj yeem noj los ntawm tib neeg lub cev. Qhov no yog ib qho tseem ceeb rau cov neeg yuav khoom tshawb nrhiav ethylene glycol cov ntaub ntawv kev nyab xeeb (SDS) thiabtuav cov txheej txheem.
Glycerol muaj viscosity ntau dua. Nws muaj peev xwm khaws cov dej noo zoo heev thiab tsis yog - lom.
Noj tau -qib glycerol muaj kev nyab xeeb rau tib neeg cov tawv nqaij sib cuag thiab siv zaub mov.
Nyob rau hauv cov nqe lus ntawm solubility, ob leeg tuaj yeem sib tov dawb nrog dej. Txawm li cas los xij, glycerol muaj cov dej muaj zog dua -retention (moisturizing) muaj peev xwm.
Daim ntawv thov sib txawv hauv kev lag luam Antifreeze
Ethylene glycol yog cov khoom siv tshuaj tiv thaiv kab mob tseem ceeb hauv kev lag luam thiab tsheb txias tshuab, thiab tau tshawb nrhiav dav dav li ethylene glycol antifreeze coolant cov khoom lag luam rau automotive engine coolant thiab industrial heat transfer systems.
Ethylene glycol tov nrog dej tuaj yeem txo qhov chaw khov rau -68 degree, ua haujlwm ruaj khov nyob rau hauv qhov chaw qis qis.
Nws muab cov cua kub kom zoo, tus nqi qis, thiab muaj zog tsawg -kub tsis kam ua haujlwm.
Nws yog dav siv nyob rau hauv lub tsheb cav txias tshuab, industrial pipeline circulation txias, thiab mechanical khoom antifreeze, ua nws ib tug tseem ceeb bulk ethylene glycol rau antifreeze ntau lawm cov khoom nyob rau hauv lub ntiaj teb no tshuaj kev lag luam.
Glycerol muaj qhov tsis muaj zog tiv thaiv kev ua haujlwm tsis zoo thiab cov nqi siab dua, txwv nws txoj kev lag luam.
Nws tsuas yog siv rau hauv qhov tshwj xeeb qis - toxicity antifreeze scenarios nrog rau kev ruaj ntseg nruj.
Nws tsis tuaj yeem hloov ethylene glycol hauv cov tshuab ua kom txias thiab tiv thaiv kab mob.
Daim ntawv thov sib txawv hauv kev lag luam tshuaj pleev ib ce
Glycerol yog siv dav thiab muaj kev nyab xeeb moisturizing muaj nyob rau hauv cov tshuaj pleev ib ce, thaum ethylene glycol raug txwv vim muaj kev txhawj xeeb txog kev nyab xeeb.
Glycerol muaj zog noo noo-locking peev xwm thiab pab daws cov tawv nqaij qhuav zoo.
Nws yog feem ntau ntxiv rau lub ntsej muag cream, tshuaj pleev ib ce, tes cream, tshuaj ntxuav lub ntsej muag, thiab tshuaj pleev ib ce.
Nws yog mos, tsis- khaus, thiab haum rau txhua hom tawv nqaij.
Qhov no ua rau nws yog cov khoom siv hauv cov khoom siv tawv nqaij txhua hnub.
Ethylene glycolmuaj peev xwm ua rau khaus thiab muaj tshuaj lom.
Nws yog nruj me ntsis txwv nyob rau hauv cov tshuaj pleev ib ce niaj hnub thiab tsis siv nyob rau hauv cov khoom nrog ntev - kev sib cuag ntawm daim tawv nqaij, nrog rau kev lag luam tshuaj pleev ib ce raw cov ntaub ntawv uas muaj xws li ethylene glycol txwv.
Nws tsuas yog pom muaj nyob rau hauv ob peb qhov kev lag luam -qib cov ntawv thov kev pabcuam, tsis yog hauv cov khoom siv saib xyuas tus kheej.
Daim ntawv thov sib txawv hauv kev lag luam zaub mov
Glycerol yog cov khoom noj uas tau pom zoo siv dav hauv kev ua zaub mov, thaum ethylene glycol raug txwv nruj heev.
Glycerol yog siv los ua cov tshuaj humectant, sweetener, thiab thickener hauv cov khoom noj.
Nws yog siv rau hauv qhob cij, ncuav mog qab zib, khoom qab zib, dej haus, thiab khaws cia txiv hmab txiv ntoo kom muaj softness thiab noo noo.
Nws raug suav hais tias muaj kev nyab xeeb rau tib neeg noj raws li kev tswj hwm kev siv.
Qhov no ua rau nws siv dav hauv kev tsim khoom noj.
Ethylene glycol yog nruj me ntsis txwv tsis pub nyob rau hauv daim ntawv thov zaub mov vim muaj kev txhawj xeeb toxicity.
Nws cov metabolites tuaj yeem ua rau muaj kev puas tsuaj rau lub raum thiab lub paj hlwb.
Nws raug cais raws li kev lag luam tshuaj lom neeg, thiab kev siv hauv cov zaub mov ua txhaum txoj cai kev nyab xeeb, suav nrog kev ua raws li cov cai ntawm ethylene glycol zaub mov kev nyab xeeb thiab kev txwv tshuaj lom neeg.
Lwm Cov Kev Siv Hluav Taws Xob
Ethylene glycol feem ntau yog siv nyob rau hauv cov tshuaj hnyav thiab petrochemical kev lag luam, thaum glycerol yog dav siv nyob rau hauv niaj hnub thiab cov neeg siv khoom-txog kev lag luam.
Ethylene glycol yog siv nyob rau hauv polyester cob, polyester fiber, tshuaj kuab tshuaj, thiab muaj tshav kub hloov xov xwm, feem ntau muab raws li ethylene glycol bulk tshuaj raw khoom rau polyester ntau lawm thiab antifreeze manufacturing.
Nws ua lub luag haujlwm tseem ceeb hauv kev lag luam- teev cov tshuaj lom neeg thiab cov txheej txheem petrochemical hauv qab.
Glycerol yog siv nyob rau hauv tshuaj txhua hnub, tshuaj, pub, thiab kev lag luam teeb.
Nws yog feem ntau cuam tshuam nrog kev nyab xeeb -kev sib cuag thiab cov neeg siv khoom- cov khoom taw qhia.
Cov ntsiab lus
Ethylene glycol (cas 107-21-1) yog qhov zoo dua rau kev ua kom khov thiab ua kom txias vim nws qhov chaw txias txias ntawm -68℃thiab tus nqi qis, ua rau nws yog ib qho tseem ceeb ethylene glycol antifreeze coolant muaj cov khoom siv raw hauv ntiaj teb cov khoom siv tshuaj.
Glycerol yog nyiam nyob rau hauv cov tshuaj pleev ib ce thiab zaub mov kev lag luam vim nws tsis yog - tshuaj lom thiab muaj zog moisturizing zog.
Qhov kev xaiv nyob ntawm qib kev nyab xeeb thiab qhov kub thiab txias yuav tsum tau ua.
Ob qho khoom siv tsis tuaj yeem hloov pauv ib leeg hauv lawv daim ntawv thov tseem ceeb.