1. Cov ntsiab lus
Carboxymethyl cellulose (CMC) yog dej-soluble anionic polysaccharide dav siv hauv cov zaub mov, cov tshuaj, tshuaj pleev ib ce, cov tshuaj pleev roj hmab, cov tshuaj pleev ib ce, tshuaj pleev roj hmab thiab cov pa roj hmab. Cov cuab yeej tseem ceeb ntawm CMC yog nws cov ntawv thov viscosity, tab sis nyob rau hauv kev siv viscosity, nws feem ntau yuav tsum tau tswj kom tau raws li kev ua haujlwm thiab kev ua tau zoo.
2. Cov qauv thiab viscosity cov yam ntxwv ntawm cmc
CMC yog carboxymethylated derivative ntawm cellulose, thiab nws cov qauv molecat txiav txim siab nws cov yam ntxwv viscosity hauv kev daws teeb meem. Lub viscosity ntawm cms yog nyob ntawm nws cov molecular hnyav, degree ntawm hloov chaw (DS), thiab ntsuas kub thiab ntsuas kub thiab ntsuas kub thiab ntsuas kub thiab ntsuas kub thiab ntsuas kub thiab ntsuas kub thiab ntsuas kub thiab ntsuas kub thiab ntsuas kub High molecular hnyav thiab siab ds feem ntau nce cov viscosity ntawm cmc, thaum nce siab kub thiab siab phos dej yuav txo nws viscosity.
3. Mechanism ntawm cov txiaj ntsig ntawm cov txiaj ntsig ntawm CMC viscosity
3.1 Electrolyte Phe
Electsolytes, xws li salts (Nacl, KCl, Cacl₂, thiab lwm yam), tuaj yeem txo lub viscosity ntawm cmc. Electrolytes sib cais rau hauv Ease hauv dej, uas tuaj yeem tiv thaiv tus nqi rov qab los ntawm CMC molecular chains, thiab yog li txo cov viscosity ntawm kev daws.
Ionic lub zog stars: Nce lub ionic lub zog hauv kev daws yuav tsis tuaj yeem pub lub luag haujlwm ntawm cov molecules, ua rau cov molecules ntau dua, thiab yog li txo cov viscosity.
Piv txwv li cation nyhuv: Cau, los ntawm kev sib koom tes nrog kev them nyiaj tsis zoo, tuaj yeem cuam tshuam ntau dua rau cov nqi them nyiaj thiab daim ntawv sib xyaw ua ke, yog li cuam tshuam rau viscospos.
3.2 Organic kuab tshuaj nyhuv
Ntxiv cov tshuaj qis qis lossis tsis yog-polar cov kuab tshuaj (xws li ethanol thiab cov propanol) tuaj yeem hloov cov kev sib txuam ntawm CMC lwg me me thiab dej lwg. Qhov kev sib cuam tshuam ntawm cov kuab tshuaj molecules thiab cmc molecules tseem tuaj yeem hloov pauv cov kev cai ntawm cov molecular chart, yog li txo lub viscosity.
Cov teeb meem loj: Cov kuab tshuaj muaj zog tuaj yeem hloov cov khoom siv dej cmcules hauv cov kuab tshuaj, tsis muaj zog ntawm cov molecular thiab txo qhov viscosity.
3.3 HLOOV
CMC yog cov kua qaub tsis muaj zog, thiab cov kev hloov pauv ntawm PH tuaj yeem cuam tshuam nws lub xeev them nqi thiab kev sib txuam nrog kev sib tham. Nyob rau hauv cov xwm txheej acidic, cov carboxyl pab pawg ntawm CMC lwg me me ua qhov nruab nrab, txo tus nqi rov qab thiab yog li txo viscosity. Nyob rau hauv Alkaline cov xwm txheej, txawm hais tias tus nqi alkalinity, huab alkalinity yuav ua rau depolymerization ntawm molecular ntawm molecular ntawm molecular, yog li txo viscosity.
Isoelectric taw cov nyhuv: nyob rau hauv cov xwm txheej ze rau ntawm isoeltric taw tes ntawm CMC (Ph Net them ntawm cov molecular saw yog tsawg, txo tus nqi rov qab thiab yog li txo viscosity.
3.4 Kev Siv Hluav Taws Kub Enzymatic
Cov enzymes tshwj xeeb (xws li cellulase) tuaj yeem txiav cov molecular chart ntawm CMC, yog li cuam tshuam rau nws viscosity. Enzymatic hydrolysis yog ib tus txheej txheem tshwj xeeb uas tuaj yeem ua kom pom tseeb tswj viscosity.
Mechanism ntawm enzymatic hydrolysis: enzymes hydrolyze lub golc molecular hnyav cmc tau tawg rau hauv me me ntawm cov molecular ntawm cov kev daws teeb meem.
4. Cov kev sib ntxiv thiab lawv cov ntawv thov
4.1 Inorganic Salts
Sodium chloride (NACL): Siv dav hauv kev lag luam khoom noj kom kho cov khoom noj los ntawm kev txo cov tshuaj pepcosity ntawm cmc.
Calcium chloride (cacl₂): siv hauv cov roj drilling los kho cov viscosity ntawm drilling cov kab txiav thiab ruaj khov lub phab ntsa zoo.
4.2 organic acids
Acetic acid (acetic acid): siv hauv cov tshuaj pleev ib ce los kho cov viscosity ntawm cmc kom yoog rau cov khoom siv sib txawv thiab cov cai hnov.
Citric acid: feem ntau siv hauv kev ua zaub mov noj los kho cov acidity thiab alkalinity ntawm kev daws kom tswj viscosity.
4.3 cov kuab tshuaj
Ethanol: Siv hauv cov kws tshuaj thiab cov tshuaj pleev ib ce los kho cov viscosity ntawm CMC kom tau cov khoom lag luam tsim nyog cov khoom lag luam rheological.
Propanol: Siv hauv kev lag luam kev lag luam los txo cov viscosity ntawm cmc daws teeb meem yooj yim ntws thiab ua.
4.4 Cov enzymes
Cellulase: Siv hauv Textile ua kom txo cov viscosity ntawm slurry, ua txheej thiab luam ntawv ntau yam zoo nkauj.
Amylase: qee zaum siv hauv kev lag luam khoom noj kom hloov cov viscosity ntawm CMC kom yoog raws kev ua haujlwm xav tau ntawm cov khoom noj sib txawv.
5. Cov yam cuam tshuam rau kev ua tau zoo ntawm kev sib ntxiv
Qhov ua tau zoo ntawm cov ntxiv ntawm cov quav ntxiv muaj kev cuam tshuam los ntawm ntau yam, suav nrog cov molecular hnyav thiab qib pib hloov ntawm kev daws teeb meem, qhov kub thiab muaj lwm yam khoom xyaw.
Molecular hnyav: cmc nrog siab molecular hnyav yuav tsum tau muaj ntau dua cov additives mus rau viscosity tsawg.
Degree ntawm Hloov Degree ntawm kev hloov pauv tsis tshua muaj kev sib ntxiv thiab yuav xav tau cov xwm txheej muaj zog lossis cov kev sib ntxiv siab dua.
Qhov kub thiab txias: nce qhov kub thiab txias feem ntau ua rau muaj kev sib ntxiv ntawm cov tshuaj ntxiv, tab sis kev kub heev yuav ua rau muaj kev cuam tshuam lossis kev sib txawv.
Cov kev sib xyaw sib xyaw: lwm cov khoom xyaw (xws li surfactants, thickeners, thiab lwm yam) yuav cuam tshuam rau kev ua yeeb yam ntawm kev sib ntxiv thiab xav tau kev txiav txim siab.
6. Cov lus qhia yav tom ntej kev txhim kho
Cov kev tshawb fawb thiab cov ntawv thov txo qis lub viscosity ntawm CMC tab tom txav mus rau ntawm ntsuab thiab muaj kev coj ua. Kev tsim cov addicitives tshiab nrog kev ua haujlwm siab thiab cov tshuaj lom tsawg, thiab tshawb txog cov khoom ntxiv ntawm Nanotechnology thiab cov khoom lag luam ntse hauv kev txhim kho yav tom ntej no.
Additive Additives: Saib rau ib txwm muab tau los yog biodegradable additives los txo cov kev cuam tshuam ib puag ncig.
Nanotechnology: Siv cov txheej txheem sib xyaw ua ke thiab sib cuam tshuam tshwj xeeb ntawm nanomaterials kom tswj tau lub viscosity ntawm cmc.
Cov ntaub ntawv uas muaj cov lus ntxiv uas muaj peev xwm tuaj yeem teb rau cov kev txhawb nqa ib puag ncig (Ph pee, kom ua tiav cov kev cai sib cais ntawm CMC viscosity.
Cov ntxiv ua si lub luag haujlwm tseem ceeb hauv kev tswj hwm CMC viscosposity. Los ntawm kev xaiv los ntawm kev xaiv thiab siv cov khoom ntxiv, cov kev xav tau ntawm ntau qhov kev lag luam thiab cov neeg siv khoom tuaj yeem ntsib zoo tau txais txiaj ntsig zoo. Txawm li cas los xij, thiaj li yuav ua tiav kev txhim kho kom muaj kev txhim kho, yav tom ntej kev tshawb fawb yuav tsum tsom rau kev txhim kho ntsuab thiab siv cov txheej txheem tshiab hauv viscosity kev cai.
Lub Sijhawm Post: Feb-17-2025