Dab tsi yog lub cev lub zog ntawm propylene glycol?

Propylene glycol yog xim tsis muaj xim, tsis muaj ntxhiab, khov, pob tshab kua, ib qho aliphatic sib xyaw uas muaj ob pawg hydroxyl. Propylene glycol tau muab faib ua 1,2-propanediol (tseem hu ua 1,2-PDO) thiab 1,3-propanediol (1,{7}}PDO).

Txij li ob pawg hydroxyl hauv propylene glycol molecule tuaj yeem raug tshuaj lom neeg, propylene glycol yog ib qho tseem ceeb ntawm cov tshuaj nruab nrab thiab muaj ntau yam kev siv hauv plastics, khaub ncaws, hluavtaws resins, tshuaj pleev ib ce, khoom noj khoom haus, thiab lwm yam. Raws li antifreeze, deicer, tshav kub hloov nruab nrab, kua detergent, thiab lwm yam.

Propyleneglycol Feem ntau yog siv los ua cov kuab tshuaj rau ntau yam txuj lom, pigments, thiab preservatives, thiab raws li ib tug extraction hnyav rau vanilla taum, roasted kas fes granules, thiab tej yam ntuj tso flavors. Moisturizer thiab softener rau khoom qab zib, qhob cij, ntim cov nqaij, cheese, thiab lwm yam.

Nws kuj tseem siv tau los ua cov tshuaj tiv thaiv kab mob rau cov noodles thiab cov cores. Ntxiv 0.006% rau cov kua mis nyeem qaub tuaj yeem ua rau qhov tsw tsis hloov pauv thaum cua sov, thiab ua kom dawb thiab ci ntsa iab ntim taum paj, thaum kib yuav nce ntim.

Propylene glycol yog ib qho nruab nrab rau cov fungicide difenoconazole. Propylene glycol tuaj yeem siv los ua cov kuab tshuaj kom yaj cov khoom noj khoom haus uas tsis soluble hauv dej xws li preservatives, pigments, antioxidants, thiab lwm yam, thiab tom qab ntawd ntxiv cov zaub mov; nws muaj zog hygroscopicity thiab muaj moisturizing thiab anti-freezing los ntawm cov zaub mov. Yuav siv tau rau hauv pastries, qhov siab tshaj plaws yog 3.0g / kg.

Hauv kev ua zaub mov, propylene glycol tuaj yeem siv los ua cov kuab tshuaj muaj txiaj ntsig zoo rau cov khoom qab zib thiab xim zaub mov, thiab tseem tuaj yeem siv los ua cov kab mob mildew inhibitor thiab txiv hmab txiv ntoo ripening preservative.

Tsis tas li ntawd, qee qhov tshuaj tiv thaiv kab mob, khoom noj khoom haus lubricants, thiab lwm yam khoom siv feem ntau siv propylene glycol ua cov khoom siv tseem ceeb. Propylene glycol yog cov khoom noj khoom haus raug cai, uas tso cai rau ntxiv rau cov khoom nyoos thiab ntub cov hmoov nplej, suav pastries, Western pastries, hli ncuav, thiab lwm yam.

(1) Txias taw tes Ntxiv ib co dej rau diol, thiab lub freezing point ntawm lub resulting tov yog qis dua 0 degree . Cov yam ntxwv no ua rau cov tshuaj aqueous glycol dav siv los ua cov tub yees nruab nrab. Sib txawv ntawm cov yam ntxwv ceev ceev ntawm qee cov kev daws teeb meem, nyob rau hauv tus txheej txheem ntawm maj mam txo qhov kub thiab txias, cov kua glycol aqueous maj mam ua viscous kom txog thaum nws tsis muaj dej ntxiv lawm.

(2) Antifreeze tiv thaiv Thaum lub sij hawm txias txias, ntau cov kua muaj kev nthuav dav. Cov kav dej thiab lwm lub kaw lus kaw uas muaj cov kua dej, thaum raug qhov kub thiab txias, tuaj yeem tawg lossis tawg vim qhov ntim ntawm cov kua.

Yog li ntawd, nws yog ib qho tsim nyog los tiv thaiv qhov kev huam yuaj tshwm sim ntawm qhov tawg ntawm cov kav dej lossis lwm yam kaw uas tshwm sim los ntawm kev nthuav dav ntawm cov dej ntim vim qhov kub thiab txias. Glycol-raws li cov kua dej feem ntau yog siv los tiv thaiv cov kua dej vim lawv qhov dej khov qis.

(3) Solubility zoo ib yam li lwm yam dej cawv uas tsis muaj molecular. Propylene glycol tuaj yeem ua rau miscible nrog dej hauv txhua qhov kev faib ua feem, thiab tom qab ntxiv qee qhov glycol rau hauv dej, ntau cov dej-insoluble tshuaj tuaj yeem yaj hauv dej cawv-dej sib tov. Propylene glycol kuj yog cov organic hnyav, thiab nws cov nyhuv dissolution zoo dua li ntawm ethylene glycol.

(4) Kev nqus dej propylene glycol muaj zog nqus dej thiab yog non-toxic. Yog li ntawd, propylene glycol yog dav siv nyob rau hauv kev lag luam khoom noj khoom haus raws li ib tug moisturizing neeg sawv cev.

(5) Viscosity Lub viscosity ntawm propylene glycol yog inversely proportional rau kub. Thaum kub nce, viscosity ntawm propylene glycol txo.

Thaum qhov kub nce mus txog qhov kub thiab txias, propylene glycol tuaj yeem ntws dawb. Ntawm qhov tsis sib xws, viscosity ntawm propylene glycol maj mam nce nrog qhov txo qis hauv qhov kub kom txog thaum nws poob ntws. poj niam deev. Piv nrog rau lwm cov kuab tshuaj kub kub thiab cov yas yas, propylene glycol muaj cov kua dej ntau dua ntawm tib qhov kub, yog li propylene glycol feem ntau siv los ua ib qho ntxiv los txo cov viscosity ntawm lwm cov khoom.

(6) Cov cua kub tshwj xeeb yog hais txog cov cua sov uas nqus los ntawm ib chav tsev hnyav ntawm cov khoom kom nce 1 degree. Ntxiv ib qho dej rau propylene glycol tuaj yeem ua rau cov cua sov tshwj xeeb ntawm propylene glycol. Ua kom zoo dua ntawm tus yam ntxwv no, propylene glycol yog dav siv los ua qhov tseem ceeb ntawm cov cua sov hloov mus rau ntau zaus.

(7) Toxicity Propylene glycol yog siv dav hauv cov khoom noj khoom haus ntxiv vim nws tsis muaj tshuaj lom. Kev puas tsuaj ntawm propylene glycol rau tib neeg thiab tsiaj txhu muaj tsawg heev.

Cov kev tshawb fawb tau pom tias tom qab 140 hnub ntawm kev pub cov nas nrog dej uas muaj 10% propylene glycol, cov nas tsis pom qhov txawv txav; Cov kev tshawb fawb tau pom tias ntxiv 4.9% rau cov khoom noj txhua hnub ntawm cov nas % propylene glycol, tom qab 24 lub hlis, tag nrho cov kev ua ub no ntawm cov nas tseem zoo li qub.