Sodium Carboxymethyl cellulose viscosity

Lub viscosity ntawm sodium carboxymethyl cellulose tseem muab faib ua ntau cov qib raws li kev siv sib txawv. Lub viscosity ntawm kev ntxhua khaub ncaws ntaus yog 10 ~ 70 (qis dua 100), qhov kev txwv sab sauv ntawm cov qoob loo thiab lwm yam kev lag luam, thiab lwm yam kev lag luam ntawm cov zaub mov yog siab dua. Lawv txhua tus nyob saum 1000, thiab cov viscosity ntawm ntau yam kev lag luam tsis zoo ib yam.

Vim nws muaj ntau yam kev siv.
Lub viscosity ntawm sodium carboxymethyl cellulose muaj cuam tshuam los ntawm nws tus nqi sib xyaw, thiab nws yog tus nqi, thiab nws yog tus nqi ntawm lub zog, thiab nws muaj txiaj ntsig, agar, sodium alginate, Pectin, cov pos hniav Arabic thiab cov hmoov txhuv nplej siab thiab nws cov derivatives muaj kev sib raug zoo (piv txwv li cov nyhuv synergistic).

Thaum tus lej py yog 7, lub viscosity ntawm sodium carboxymethyl cellulose tov yog qhov siab tshaj plaws, thiab thaum tus nqi py yog 4 ~ 11, nws yog qhov ruaj khov. Carboxymethylcellulose nyob rau hauv daim ntawv ntawm alkali hlau thiab ammonium ntsev yog soluble hauv dej. Divalent Hlau ions CA2 +, MG2 +, FE2 + tuaj yeem cuam tshuam nws cov viscosity. Cov hlau hnyav xws li nyiaj, barium, chromium lossis FE3 + tuaj yeem ua rau nws nag lossis ua ntej. Yog hais tias cov conc yog tswj hwm, xws li ntxiv ntawm cov chelating tus neeg sawv cev, ua kom muaj kuab tshuaj pleev tau tuaj yeem tsim, ua rau cov pos hniav muag lossis tawv tawv.

Sodium Carboxymethyl cellulose yog ib hom ntawm cov duab paj rwb thiab cov tshuaj tiv thaiv ntoo nrog cov tshuaj tiv thaiv mountochloroacetic nyob rau hauv Alkaline cov xwm txheej.

Raws li cov lus qhia tshwj xeeb ntawm cov ntaub ntawv raw thiab hloov chaw ntawm hydroxyl pawg los ntawm cov qib d-fydrocruation nrog cov kev hloov pauv sib txawv thiab sib txawv molecular phaus.

Vim tias sodium carboxymethyl cellulose muaj ntau yam tshwj xeeb thiab cov yam ntxwv zoo heev, nws yog siv cov khoom lag luam txhua hnub, khoom noj thiab kev lag luam khoom.

Ib qho ntawm cov ntsuas tseem ceeb tshaj plaws ntawm sodium carboxymethyl cellulose yog viscosity ntawm sodium carboxymethyl cellulose. Tus nqi viscosity muaj feem xyuam rau ntau yam xws li kev xav, kub thiab shear tus nqi. Txawm li cas los xij, yam xws li kev xav, kub thiab shear tus nqi yog cov xwm txheej sab nraud uas cuam tshuam rau viscosity ntawm sodium carboxymethyl cellulose.

Nws cov roj ntsha hnyav thiab cov khoom faib khoom siv hluav taws xob yog qhov cuam tshuam sab hauv uas cuam tshuam rau cov viscosity ntawm sodium carboxymethyl cellulose tov. Rau kev tswjhwm ntau thiab cov khoom lag luam kev ua tau zoo ntawm cov sodium Carboxymethyl cellulose muaj nqis, thaum ntsuas tau tsuas yog siv lub luag haujlwm.

Newton cov kev cai lij choj hauv rheology, thov nyeem cov ntsiab lus cuam tshuam ntawm "Rheology" hauv lub cev "hauv lub cev" hauv lub cev "hauv kev ntsuas lub cev, nws nyuaj rau piav qhia hauv ib lossis ob kab lus. Yog tias koj yuav tsum hais nws: Rau qhov kev daws teeb meem dilution rau ntawm cov dej khov kho, cov kev ntxhov siab ntawm kev txiav nyiaj, thiab cov coefficient rau lawv yog hu ua viscosity coefficient lossis kinematic viscosity.

Viscosity yog muab tau los ntawm cov rog ntawm cellulose molecular chains, suav nrog kev sib tw thiab hydrogen bonds. Tshwj xeeb, cov polymerization ntawm cellulose derivatives tsis yog txoj kab kev qauv tab sis muaj ntau tus qauv. Hauv kev daws teeb meem, ntau cov cellulose cellulose tau cuam tshuam nrog cov qauv kev sib txuas lus sib xws. Tus qauv hloov kho tus qauv, cov zog ntau dua ntawm cov molecular chains nyob rau hauv lub txiaj ntsig.

Txhawm rau kom tsim cov kev daws teeb meem ntawm cov tshuaj me me ntawm cellulose ntawm cov molecular charts yuav tsum tau kov yeej, yog li kev daws teeb meem nrog qib siab yuav tsum tau ua ntau dua los ua kom muaj kev ntws. Rau kev ntsuas viscosity, lub zog rau ntawm CMC cov tshuaj yog lub ntiajteb txawj nqus. Nyob rau hauv cov xwm txheej ntawm constant lub zog, cov saw qauv ntawm cov qauv kev daws teeb meem nrog cov qib loj ntawm polymerization muaj lub zog loj, thiab khiav qeeb. Kev khiav qeeb ntws tawm qhov viscosity.

Lub viscosity ntawm sodium carboxymethyl cellulose yog feem ntau cuam tshuam nrog lub cev hnyav molecular, thiab muaj me ntsis los ua nrog qib degree. Qhov ntau dua cov qib kev hloov pauv, qhov hnyav dua molecular hnyav, vim hais tias lub cev hnyav dua ntawm cov pab pawg carboxymethyl loj dua li cov pab pawg hydroxyl.

Cov ntsev ntsev ntawm cellulose carboxymethil ete, nrog lub ntom ntom ntawm 0.5-0.7 g / col3, yuav luag tsis muaj ntxhiab, thiab hygroscopic. Nws yog ib qho yooj yim rau tawg hauv dej los ua cov tshuaj ntsuab colloidal, thiab yog insoluble hauv cov kuab tshuaj ethanol. Cov PHC ntawm 1% kev daws teeb meem yog 6.5 rau 8.5. Thaum Ph> 10 lossis <5, lub viscosity ntawm sodium carboxymethylcelleculose tau txo qis, thiab kev ua tau zoo tshaj plaws thaum ph = 7.

Nws yog qhov ruaj khov. Lub viscosity nce sai sai hauv qab 20 ℃, thiab hloov maj mam ntawm 45 ℃. Lub sijhawm ntev ntev saum toj 80 ℃ Yuav yeem yeem daws cov colloid thiab txo qhov viscosity thiab kev ua tau zoo heev. Nws yog yooj yim soluble hauv dej, thiab kev daws teeb meem yog pob tshab; Nws yog qhov ruaj khov nyob rau hauv kev daws teeb meem alkaline, thiab nws yooj yim rau hydrolyze nyob rau hauv muaj cov kua qaub. Thaum tus nqi PH yog 2-3, nws yuav nag ntsis.