Umehluko phakathi kwe-1,3 propanediol ne-1,2 propanediol

I-1,3-propanediol kanye ne-1,2-propanediol zombili izinhlanganisela eziphilayo zesigaba sama-diols, okusho ukuthi zinamaqembu amabili asebenzayo e-hydroxyl (-OH).Ngaphandle kokufana kwazo kwesakhiwo, zibonisa izakhiwo ezihlukene futhi zinezinhlelo zokusebenza ezihlukile ngenxa yokuhlelwa kwala maqembu asebenzayo ngaphakathi kwezakhiwo zawo zamangqamuzana. 

1,3-Propanediol:

I-1,3-propanediol, evame ukufushaniswa njenge-1,3-PDO, inefomula yamakhemikhali ethi C3H8O2.Iwuketshezi olungenambala, olungenaphunga, futhi olunganambitheki ezingeni lokushisa elivamile.Umehluko obalulekile ekwakhekeni kwawo ukuthi amaqembu amabili e-hydroxyl akhiwe kuma-athomu ekhabhoni ahlukaniswa yi-athomu yekhabhoni eyodwa.Lokhu kunikeza i-1,3-PDO izakhiwo zayo ezihlukile.

Izakhiwo kanye nezicelo ze-1,3-Propanediol:

I-Solvent:I-1,3-PDO iyi-solvent ewusizo yezinhlanganisela ezihlukahlukene ze-polar ne-nonpolar ngenxa yesakhiwo sayo samakhemikhali esiyingqayizivele.

I-antifreeze:Ivamise ukusetshenziswa njenge-ejenti ye-antifreeze ezinsizeni zezimoto nezimboni ngoba inendawo yokuqandisa ephansi kunamanzi.

Ukukhiqizwa kwePolymer: I-1,3-PDO isetshenziswa ekukhiqizeni ama-polymers angaboli njenge-polytrimethylene terephthalate (PTT).Lawa ma-biopolymers anezinhlelo zokusebenza ezindwangu kanye nokupakishwa.

1,2-Propanediol:

I-1,2-propanediol, eyaziwa nangokuthi i-propylene glycol, inefomula yamakhemikhali engu-C3H8O2 futhi.Umehluko oyinhloko ukuthi amaqembu ayo amabili e-hydroxyl akhiwe eduze kwama-athomu ekhabhoni ngaphakathi kwe-molecule.

Izakhiwo Nezicelo ze-1,2-Propanediol (Propylene Glycol):

I-Antifreeze ne-Deicing Agent: I-Propylene glycol ivame ukusetshenziswa njenge-antifreeze ekucubunguleni ukudla, ukufudumeza, kanye nezinhlelo zokupholisa.Ibuye isetshenziswe njenge-ejenti ye-deicing yezindiza.

I-Humectant:Isetshenziswa emikhiqizweni ehlukahlukene yezimonyo neyomuntu siqu njenge-humectant yokugcina umswakama.

Isengezo sokudla:I-Propylene glycol ihlukaniswa ngokuthi "ivame ukuqashelwa njengephephile" (GRAS) yi-US Food and Drug Administration (FDA) futhi isetshenziswa njengesengezo sokudla, ngokuyinhloko njengesithwali sezinongo nemibala embonini yokudla.

Ezemithi:Isetshenziswa kwezinye izinhlobo zemithi njengesixazululi nesithwali sezidakamizwa.

Kafushane, umehluko oyinhloko phakathi kwe-1,3-propanediol ne-1,2-propanediol isekuhlelweni kwamaqembu abo e-hydroxyl ngaphakathi kwesakhiwo samangqamuzana.Lo mehluko wesakhiwo uholela ezakhiweni ezihlukile kanye nezinhlelo zokusebenza ezihlukahlukene zalawa ma-diols amabili, ne-1,3-propanediol esetshenziswa ku-solvents, i-antifreeze, nama-polymers abolayo, kuyilapho i-1,2-propanediol (propylene glycol) ithola ukusetshenziswa ku-antifreeze, ukudla, izimonyo. , kanye nemithi.