Qhov sib txawv tseem ceeb ntawm carboxymethyl cellulose thiab hydroxypropyl methylcellulose yog tias carboxymethyl cellulose muaj cov dej tuav qis dua, hos hydroxypropyl methylcellulose muaj cov dej tuav ntau dua thaum piv rau tib cov nqi.
Tus nqi tuav dej yog qhov ntsuas ntawm cov dej ntau npaum li cas tuaj yeem khaws cia hauv cov khoom. Carboxymethyl cellulose thiab hydroxypropyl methylcellulose yog derivatives ntawm cellulose muaj qhov sib txawv ntawm cov dej tuav tus nqi.
YCarboxymethyl Cellulose yog dab tsi?
Carboxymethyl cellulose yog ib qho derivative ntawm cellulose muaj cov carboxymethyl pawg, uas yog sib koom ua ke rau hydroxyl pawg ntawm glucopyranose monomers. Glycopyranose monomers yog cov koog uas tsim cov pob txha ntawm cov qauv cellulose. Feem ntau, cov khoom no muaj txiaj ntsig zoo hauv nws daim ntawv ntsev ntsev. Nws yog lub npe hu ua sodium carboxymethyl cellulose. Peb tuaj yeem pom cov tshuaj no ua lag luam hauv lub npe Tylose.
Daim duab 01: Rov Ua Chav ntawm Carboxymethyl Cellulose
Thaum xav txog kev tsim cov carboxymethyl cellulose, peb tuaj yeem tsim nws los ntawm alkali catalyzed cov tshuaj tiv thaiv cellulose nyob rau hauv muaj chloroacetic acid. Hauv cov txheej txheem tsim khoom no, pawg polar carboxyl ua rau cov cellulose soluble thiab kuj muaj tshuaj lom neeg. Cov kauj ruam pib no muab cov tshuaj tiv thaiv sib xyaw uas muaj li ntawm 60% ntawm carboxymethyl cellulose thiab txog 40% ntawm cov ntsev xws li sodium chloride thiab sodium glycolate. Technically, cov khoom no yog cov khoom muaj nyob rau hauv detergents. Txawm li cas los xij, peb tuaj yeem siv txoj kev ua kom huv ntxiv kom tshem tawm cov ntsev ntsev thiab tau txais cov ntshiab carboxymethyl cellulose uas muaj txiaj ntsig zoo hauv kev lag luam xws li zaub mov, tshuaj, thiab tshuaj txhuam hniav. Ntxiv mus, cov txheej txheem no muab cov khoom nruab nrab uas tuaj nyob rau hauv "qib semipurified" thiab muaj txiaj ntsig zoo hauv daim ntawv thov tsim khoom.
Muaj ntau qhov sib txawv ntawm kev siv carboxymethyl cellulose, thiab qee qhov ntawm lawv suav nrog kev siv hauv kev lag luam zaub mov raws li E tus lej E466 ua cov viscosity modifier lossis thickener thiab pab kom ruaj khov emulsions hauv ntau yam khoom xws li ice cream. Ntxiv mus, cov khoom no muaj nyob rau hauv ntau yam khoom uas tsis yog-edible, nrog rau cov tshuaj txhuam hniav, laxatives, noj tshuaj, tshuaj pleev xim rau dej, detergents, textile sizing, ntawv cov khoom, thiab lwm yam.
Hydroxypropyl Methylcellulose (Hypromellose) yog dab tsi?
Hydroxypropyl methylcellulose yog ib yam tshuaj pab kho qhov muag qhuav thiab kho qhov muag irradiation. Cov kev mob tshwm sim ntawm cov tshuaj no muaj xws li cov tsos mob ntawm kev tsis haum tshuaj xws li pob khaus, khaus khaus, khaus, liab thiab o thiab tev tawv nqaij, nruj hauv siab los yog caj pas, hloov qhov muag pom, mob qhov muag, thiab qhov muag tsis zoo. Cov tshuaj no tuaj yeem khaws cia ntawm chav tsev kub, tawm ntawm cov menyuam yaus.
Daim duab 02: Rov Ua Haujlwm ntawm Hypromellose
Hydroxypropyl methylcellulose tseem hu ua hypromellose, thiab nws yog semisynthetic, inert, viscoelastic polymer. Ntxiv nrog rau kev siv hauv cov khoom lag luam, cov tshuaj no tseem muaj txiaj ntsig zoo hauv kev lag luam khoom noj khoom haus raws li cov khoom noj ntxiv, qhov twg nws tuaj yeem ua raws li emulsifier, thickening thiab suspending agent, thiab kuj yog lwm txoj hauv kev rau tsiaj gelatin. Tus lej E rau cov khoom siv hauv kev lag luam zaub mov yog E 464.
Feem ntau, cov tshuaj no yog tsim los ntawm cov khoom siv, uas muaj cov tsos dawb me ntsis, thiab nws tuaj yeem tsim ua granules. Cov granules no tuaj yeem tsim cov colloids thaum ntxiv rau dej. Nws yog cov khoom tsis muaj tshuaj lom uas yog combustible, thiab nws kuj tuaj yeem hnov mob nrog oxidizing agents.
Ntawm ntau qhov kev siv Hypromellose, feem ntau cov ntawv thov suav nrog siv nws ua cov nplaum nplaum, cov cement renders, gypsum khoom, tshuaj, xim thiab txheej, khoom noj khoom haus, tshuaj pleev ib ce, tshuaj ntxuav tes, tshuaj ntxuav tes, tshuaj pleev qhov muag, thiab lwm yam.
Qhov txawv ntawm Carboxymethyl Cellulose thiab Hydroxypropyl Methylcellulose yog dab tsi?
Tus nqi tuav dej yog qhov ntsuas ntawm cov dej ntau npaum li cas tuaj yeem khaws cia hauv cov khoom. Qhov sib txawv tseem ceeb ntawm carboxymethyl cellulose thiab hydroxypropyl methylcellulose yog tias carboxymethyl cellulose muaj cov dej tuav qis dua, hos hydroxypropyl methylcellulose muaj cov dej tuav ntau dua thaum piv rau tib cov nqi.
Cov duab hauv qab no nthuav tawm qhov sib txawv ntawm carboxymethyl cellulose thiab hydroxypropyl methylcellulose hauv daim ntawv.
Summary – Carboxymethyl Cellulose vs Hydroxypropyl Methylcellulose
Carboxymethyl cellulose thiab hydroxypropyl methylcellulose yog cov derivatives ntawm cellulose muaj qhov sib txawv ntawm cov dej tuav. Qhov sib txawv tseem ceeb ntawm carboxymethyl cellulose thiab hydroxypropyl methylcellulose yog tias carboxymethyl cellulose muaj cov dej tuav qis dua, hos hydroxypropyl methylcellulose muaj cov dej tuav ntau dua thaum piv rau tib cov nqi.
