Lub ntiav admixture, uas ua si lub luag haujlwm tseem ceeb hauv kev txhim kho cov tshuaj khib nyiab qhuav, nyiaj rau ntau dua 40% ntawm cov khoom siv hauv cov nqi sib xyaw qhuav. Feem ntau ntawm admixtures hauv kev ua lag luam hauv tsev yog muab los ntawm cov chaw tsim khoom txawv teb chaws, thiab cov kev siv tshuaj los ntawm cov khoom lag luam. Tus nqi ntawm cov khoom siv cug tov qhuav cov khoom tseem zoo li, thiab nws nyuaj rau cov kab cug thiab cov roj av ntau thiab ntau. High-end kev lag luam khoom lag luam yog tswj hwm los ntawm cov tuam txhab txawv teb chaws, thiab cov khoom sib xyaw qhuav sib xyaw muaj cov txiaj ntsig tsis muaj txiaj ntsig; Daim ntawv thov ntawm ScsXtures tsis muaj cov kev tshawb fawb thiab kev tshawb nrhiav tau, thiab dig muag ua raws cov qauv txawv teb chaws. Ntawm no, dab tsi peb faib rau koj yog, dab tsi yog lub luag haujlwm ntawm hydroxypropylulose nyob rau hauv cov kev collixatures qhuav?
HydroxyPropyyl methylulose yog lub cellulose ntau nws cov zis thiab noj tau nce zuj zus nyob rau hauv xyoo tas los no. HydroxyPropyyl methylulose yog ua los ntawm kev kho paj rwb tom qab kev kho mob endhlene thiab methylene oxide, cov tshuaj uas tsis yog tshuaj pleev ib ntus ntawm ither ua los ntawm kev tawm tsam. Qib degree hloov chaw yog feem ntau 1.2 ~ 2.0. Nws cov khoom yog sib txawv raws li qhov sib piv ntawm mexoxyl cov ntsiab lus thiab hydroxypropropsyl cov ntsiab lus. Cov yam ntxwv ntawm hydroxypropyl methylcellulose yog raws li hauv qab no:
1. HydroxyPropythelthylculose yog yooj yim soluble hauv dej txias, thiab nws yuav ntsib cov teeb meem hauv cov dej kub. Tab sis nws gelation kub hauv dej kub yog qhov siab dua li ntawm methyl cellulose. Lub solubility hauv dej txias kuj tseem txhim kho piv nrog methyl cellulose.
2. Lub viscosity ntawm hydroxypropyl methylcellulose muaj feem xyuam rau nws txoj kev molecular. Qhov loj dua cov molecular hnyav, ntau dua viscosity. Qhov kub kuj cuam tshuam rau nws cov viscosity, raws li kub nce ntxiv, viscosity txo. Txawm li cas los xij, tus cawv ntawm nws cov siab viscosity thiab kub yog qis dua ntawm methyl cellulose. Nws cov kev daws teeb meem yog ruaj khov thaum khaws cia ntawm chav tsev kub.
3. Cov dej tuav tseg ntawm hydroxypropylulose nyob ntawm nws tus nqi ntxiv, thiab nws cov dej khaws cia nyob rau hauv tib tus nqi yog siab dua li ntawm methyl cellulose.
4. HydroxyPropylencellulose yog ruaj khov rau cov kua qaub thiab alkali, thiab nws cov kua aqueous yog qhov ruaj khov heev hauv cov ph = 2 ~ 12. Caustic dej qab zib thiab kua qaub muaj cov nyhuv me me rau nws cov kev ua tau zoo, tab sis alkali tuaj yeem ua rau nws qhov kev sib cais thiab me ntsis nce nws qhov viscosity. HydroxyPropyyl methylulose yog ruaj khov rau cov ntsev ua kom zoo, tab sis thaum lub hom phiaj ntawm hydroxypropen methylropylulose kev daws teeb meem.
5. Xws li cov dej cawv polyvinyl, cov hmoov txhuv nplej siab ether, zaub cov pos hniav, thiab lwm yam.
6. HydroxyPropyyl methylulose tau zoo dua enzyme tiv thaiv dua li methylcellose, thiab qhov ua tau ntawm enzymatic degradation ntawm nws cov kev daws teeb meem yog qis dua li methylcellulose.
7. Cov nplaum ntawm hydroxypropyyl methylcellulose rau tshuaj tshuaj kho yog siab tshaj li methylcellulose.
Lub Sijhawm Post: Lub Tsib Hlis-09-2023