1. hygroscopicity
Carboxymethylcellulose sodium CMC muaj tib lub nqus dej zoo li lwm cov kua nplaum uas muaj dej-soluble.Nws cov av noo sib npaug nce nrog qhov nce ntawm cov av noo thiab txo qis nrog qhov nce ntawm qhov kub thiab txias.Qhov siab dua ntawm DS, qhov ntau dua cov av noo, thiab cov khoom muaj zog dua qhov nqus dej.Yog tias lub hnab qhib thiab muab tso rau hauv huab cua nrog cov av noo siab rau lub sijhawm, nws cov ntsiab lus noo noo tuaj yeem ncav cuag 20%.Thaum cov dej ntsiab lus yog 15%, daim ntawv hmoov ntawm cov khoom yuav tsis hloov.Thaum cov ntsiab lus dej nce mus txog 20%, qee cov khoom yuav sib sau thiab lo rau ib leeg, txo qhov fluidity ntawm cov hmoov.CMC yuav nce hauv qhov hnyav tom qab nqus dej noo, yog li qee cov khoom tsis ntim khoom yuav tsum tau muab tso rau hauv cov thawv airtight lossis khaws cia rau hauv qhov chaw qhuav.
2. Carboxymethyl Cellulose Sodium CMC Dissolved
Carboxymethylcellulose sodium CMC, zoo li lwm cov dej-soluble polymers, nthuav tawm o ua ntej yaj.Thaum ib tug loj npaum li cas ntawm carboxymethylcellulose sodium CMC tov yuav tsum tau npaj, yog hais tias txhua particle yog uniformly o, ces cov khoom dissolves sai.Yog tias tus qauv raug muab pov rau hauv dej sai sai thiab lo rau hauv ib qho thaiv, "ntses qhov muag" yuav tsim.Cov hauv qab no piav qhia txog txoj kev ua kom sai sai CMC: maj mam muab CMC tso rau hauv dej hauv nruab nrab stirring;CMC yog pre-dispersed nrog ib tug dej-soluble hnyav (xws li ethanol, glycerin), thiab ces maj mam ntxiv dej nyob rau hauv nruab nrab stirring;Yog hais tias lwm cov hmoov additives yuav tsum tau ntxiv rau cov tshuaj, ua ntej sib tov cov additives thiab CMC hmoov, thiab ces ntxiv dej kom yaj;rau qhov yooj yim ntawm cov neeg siv, instant granule thiab hmoov instant khoom yog launched.
3. Rheology ntawm Sodium Carboxymethyl Cellulose CMC Solution
Sodium carboxymethyl cellulose CMC tov yog cov kua uas tsis yog-Newtonian, uas qhia tau hais tias tsis tshua muaj viscosity ntawm kev kub ceev, uas yog hais tias, vim hais tias tus nqi viscosity ntawm sodium carboxymethyl cellulose CMC nyob ntawm qhov kev ntsuas, yog li "pom meej viscosity" yog siv los piav txog nws. xwm.
Qhia nyob rau hauv daim duab rheological nkhaus: Qhov xwm ntawm cov dej tsis-Newtonian yog qhov kev sib raug zoo ntawm tus nqi shear (rotational ceev ntawm lub viscometer) thiab lub zog shear force (torque ntawm lub viscometer) tsis yog ib tug linear kev sib raug zoo, tab sis ib tug nkhaus.
Carboxymethyl cellulose sodium CMC tov yog cov kua pseudoplastic.Thaum ntsuas qhov viscosity, qhov ceev ntawm kev sib hloov ceev, qhov me me ntsuas viscosity, uas yog hu ua shear thinning effect.
4. Carboxymethyl Cellulose Sodium CMC Viscosity
1) viscosity thiab nruab nrab degree ntawm polymerization
Lub viscosity ntawm sodium carboxymethylcellulose CMC tov yog nyob ntawm qhov nruab nrab degree ntawm polymerization ntawm cellulose chains ua lub moj khaum.Nws muaj kwv yees li kev sib raug zoo ntawm viscosity thiab nruab nrab degree ntawm polymerization.
2) viscosity thiab concentration
Kev sib raug zoo ntawm viscosity thiab concentration ntawm qee hom sodium carboxymethylcellulose CMC.Viscosity thiab concentration yog roughly logarithmic.Sodium carboxymethyl cellulose CMC tshuaj tuaj yeem tsim cov viscosity siab heev ntawm qhov tsis tshua muaj siab, cov yam ntxwv no ua rau CMC tuaj yeem siv los ua cov thickener zoo heev hauv daim ntawv thov.
3) viscosity thiab kub
Lub viscosity ntawm carboxymethylcellulose sodium CMC aqueous tov txo nrog qhov nce ntawm qhov kub thiab txias, tsis hais hom thiab concentration, qhov sib txawv ntawm cov tshuaj viscosity thiab kub kev sib raug zoo nkhaus yog qhov zoo ib yam.
4) viscosity thiab pH
Thaum pH yog 7-9, viscosity ntawm CMC cov tshuaj ncav cuag nws qhov siab tshaj plaws thiab ruaj khov heev.Lub viscosity ntawm sodium carboxymethylpyramid yuav tsis hloov pauv ntau hauv pH ntau ntawm 5-10.CMC dissolves sai dua nyob rau hauv alkaline tej yam kev mob tshaj nyob rau hauv nruab nrab tej yam kev mob.Thaum pH> 10, nws yuav ua rau CMC degrade thiab txo cov viscosity.Thaum cov kua qaub ntxiv rau CMC cov tshuaj, qhov kev ruaj ntseg ntawm cov tshuaj txo qis vim tias H + hauv cov tshuaj hloov cov Na + ntawm cov saw molecular.Hauv cov kua qaub muaj zog (pH = 3.0-4.0) semi-sol pib tsim, uas txo cov viscosity ntawm cov tshuaj.Thaum pH <3.0, CMC pib ua kom insoluble hauv dej thiab tsim CMC acid.
CMC nrog qib siab ntawm kev hloov pauv muaj zog hauv cov kua qaub thiab alkali tsis kam tshaj CMC nrog qis DS;CMC nrog tsawg viscosity muaj zog nyob rau hauv acid thiab alkali tsis kam tshaj CMC nrog viscosity siab.
Post lub sij hawm: Jan-28-2023