Glycerol/CAS: 56-81-5
Kev Piav Qhia Luv:
Lub Npe Khoom: Glycerol
CAS: 56-81-5
Hom: ZA-Y
MF: C3H8O3
MW: 92.09
QAUV:
Kev piav qhia:
Glycerol yog ib yam cawv trihydric uas tsis muaj xim, nplaum, hygroscopic, thiab qab zib. Nws kuj hu ua glycerin lossis glycerine, nrog rau lo lus glycerol yog qhov nyiam ua cov tshuaj ntshiab thiab lo lus glycerin(e) yog siv thaum cov tshuaj no siv rau hauv kev lag luam hauv ntau qib.
Kev Qhia Tshwj Xeeb:
| Khoom | Cov Lus Qhia Tshwj Xeeb |
| Qhov kub yaj | 20 ° C (lit.) |
| Kub taw tes | 290°C |
| Qhov Ceev | 1.25 g/mL (lit.) |
| Qhov ceev ntawm cov pa dej | 3.1 (vs huab cua) |
| Lub zog ua pa | <1 hli Hg (20 °C) |
| Cov ntsuas kev cuam tshuam | n20/D 1.474(lit.) |
| Fp | 320 °F |
| Cia txias. | Khaws cia ntawm +5°C txog +30°C. |
| Kev yaj tau | H2O: 5 M ntawm 20 ° C, meej, tsis muaj xim |
| Daim Ntawv | Cov kua nplaum |
| Xim | APHA: ≤10 |
| PH ntau yam | 5.5-8 |
Kev Siv
Cov yam ntxwv ntawm Glycerol ua rau nws muaj txiaj ntsig zoo rau ntau yam kev siv. Peb pawg hydroxyl hauv glycerol tso cai rau kev sib txuas hydrogen ntau uas muab glycerol nws cov yam ntxwv ntawm cov kua nplaum uas muaj viscous thiab hygroscopic. Kwv yees li 40% ntawm kev siv glycerol yog rau cov khoom siv tu tus kheej xws li tshuaj pleev ib ce, xab npum, tshuaj zawv plaub hau, tshuaj pleev, tshuaj ntxuav qhov ncauj, thiab tshuaj txhuam hniav. Glycerol cov yam ntxwv hygroscopic ua rau nws yog ib qho tshuaj pleev zoo hauv cov khoom tawv nqaij. Lwm 25% ntawm glycerol txhua xyoo tsim tawm yog siv rau hauv kev tsim khoom noj. Hauv kev lag luam khoom noj khoom haus glycerol yog siv los ua tus neeg sawv cev ntub dej, ua cov kuab tshuaj rau cov xim zaub mov thiab cov kua txiv hmab txiv ntoo, los tiv thaiv kev sib xyaw ntawm cov suab thaj hauv cov khoom qab zib thiab cov khoom qab zib, ua cov tshuaj tiv thaiv, thiab ua tus neeg sawv cev qab zib. Kwv yees li 10% ntawm kev siv glycerol mus rau hauv kev ua cov luam yeeb, qhov twg nws tau txau rau ntawm nplooj luam yeeb ua ntej lawv raug txiav kom ua tus neeg sawv cev ntub dej. Glycerol muaj qhov txiaj ntsig ntxiv ntawm kev muab qhov saj qab zib rau kev zom luam yeeb. 25% ntawm cov glycerol siv seem yog faib rau ntau yam kev siv hauv kev lag luam. Nws yog siv rau hauv cov tshuaj hnoos thiab cov tshuaj elixir. Hauv kev lag luam, glycerol pom muaj nyob rau hauv cov roj nplua nyeem, cov yas ua kom yas, cov nplaum, cov tshuaj tiv thaiv kev khov, cov resins, thiab cov ua npuas rwb thaiv tsev. Muaj ib lub sijhawm nws tau siv yuav luag tsuas yog hauv nws daim ntawv nitrated ua cov khoom tawg (saib Nitroglycerin), uas niaj hnub no suav txog li 3% ntawm nws siv.
Glycerol yog ib yam khoom siv los ua kom daim tawv nqaij noo. Nws khi dej thiab nqus tau dej los ntawm huab cua, yog li pab kom daim tawv nqaij khaws cov dej noo. glycerin tau raug kawm ntau yam txog nws lub peev xwm ua kom daim tawv nqaij noo. Raws li cov ntaub ntawv muaj, glycerin tau raug tsim los ua ib yam khoom siv ua kom daim tawv nqaij noo. Yam tsawg kawg ib feem ntawm nws cov haujlwm yog vim nws ua rau cov tshuaj tiv thaiv enzymatic yooj yim hauv daim tawv nqaij, yog li ua rau cov corneocyte desquamation. glycerin kuj txhim kho cov yam ntxwv ntawm cov tshuaj pleev thiab tshuaj pleev. Nws yog ib yam kua ntshiab, kua qab zib uas ua los ntawm kev sib xyaw dej thiab roj uas feem ntau yog los ntawm cov roj zaub. Txawm hais tias glycerin tsis tau pom tias ua rau ua xua, nws yuav ua rau daim tawv nqaij comedogenic thiab khaus thaum siv rau hauv cov tshuaj concentrated.
Glycerol siv tau ob qho tib si rau kev npaj cov qauv thiab kev tsim cov gel rau polyacrylamide gel electrophoresis. Glycerol (5-10%) ua rau cov qauv ntom ntom ntau dua kom cov qauv yuav txheej rau hauv qab ntawm cov qauv gel zoo. Glycerol kuj tseem siv tau los pab rau kev casting gradient gels thiab ua cov protein stabilizer thiab cov khoom khaws cia buffer.
Ua cov kuab tshuaj, cov tshuaj humectant, cov tshuaj plasticizer, cov tshuaj emollient, cov khoom qab zib, hauv kev tsim cov nitroglycerol (dynamite), cov tshuaj pleev ib ce, cov xab npum ua kua, cov dej cawv, cov khoom qab zib, cov xim dub, cov luam ntawv thiab cov ntawv theej, cov roj nplua nyeem, cov kua nplaum elastic, cov cement oxide ua los ntawm txhuas; kom cov ntaub yooj ywm; kom khaws cov ntawv luam ntawv ntawm paj rwb; rau cov menyuam luam ntawv, hectographs; kom tiv thaiv te los ntawm cov iav qhov rais; ua cov tshuaj tiv thaiv kev khov hauv tsheb, cov roj ntsuas thiab cov hydraulic jacks, hauv cov kua dej nqus dej. Hauv kev fermentation cov as-ham hauv kev tsim cov tshuaj tua kab mob. Kev pab tshuaj (humectant; cov kuab tshuaj, tsheb). Leffingwell thiab Lesser (op. cit.) muab 1583 qhov kev siv sib txawv.
Ntim thiab Xa Khoom
250KG / Nruas los yog raws li cov neeg siv khoom xav tau.
Yog cov khoom siv dav dav thiab tuaj yeem xa los ntawm dej hiav txwv thiab huab cua
Khaws cia thiab khaws cia
Lub neej txee: 24 lub hlis txij li hnub tsim khoom hauv cov ntim khoom tsis tau qhib khaws cia rau hauv qhov chaw txias thiab qhuav kom tsis txhob raug tshav ntuj ncaj qha, dej.
Lub tsev rau khoom muaj cua nkag, ziab kom qhuav kub tsawg, Sib cais ntawm cov tshuaj oxidants, cov kua qaub.
