Carboxymetylcelleculose (CMC) yog kev ua haujlwm ntxiv nyob rau hauv ntau yam khoom lag luam, chaw muag tshuaj, chaw muag tshuaj, papermaking, textiles, thiab mining. Nws yog muab tau los ntawm cov ntaub ntawv ntawm ntuj ntuj, uas muaj ntau hauv cov nroj tsuag thiab lwm cov ntaub ntawv txheeb. CMC yog dej-soluble polymer nrog cov khoom tshwj xeeb suav nrog viscosity, hydration, adhesion thiab adhesion.
CMC cov yam ntxwv
CMC yog lub cellulose derivative uas yog cov tshuaj hloov kho los ntawm kev qhia cov pab pawg carboxymethyl rau hauv nws cov qauv. Qhov kev hloov pauv no tau txhim kho rau solubility thiab hydrophilicity ntawm cellulose, yog li kev txhim kho kev ua haujlwm. Cov khoom ntawm CMC yog nyob ntawm nws cov qib ntawm hloov (DS) thiab hnyav hnyav (MW). DS txhais tau tias yog tus naj npawb ntawm cov Carboxymethyl ib pawg twg hauv lub cellulose hauv lub cellulose thiab mw qhia txog qhov loj me thiab faib cov ntaub pua npab.
Ib qho ntawm cov khoom tseem ceeb ntawm CMC yog nws cov dej solubility. CMC yog yooj yim soluble hauv dej, sib sau ua cov tshuaj uas khov nrog pseudoplastic khoom. Qhov kev coj ua ntawm rheological los ntawm kev sib txuas lus nruab nrab ntawm CMC lwg me me, ua rau muaj kev txo qis hauv viscosity. Lub Pseudoplastic xwm ua rau lawv haum rau ntau yam kev siv xws li thickeners, stabilizers, thiab ncua cov neeg sawv cev.
Lwm tus yam ntxwv tseem ceeb ntawm CMC yog nws cov yeeb yaj kiab ua yeeb yam. CMC cov ntsiab yuav raug muab pov rau hauv cov yeeb yaj kiab nrog cov khoom siv tshuab zoo nkauj, pob tshab, thiab yooj. Cov yeeb yaj kiab no tuaj yeem siv los ua cov tsho tiv no, laminates thiab ntim cov khoom siv.
Tsis tas li ntawd, CMC muaj cov khoom sib raug zoo thiab ua kom zoo. Nws tsim cov kev sib txuas uas muaj zog nrog cov chaw sib txawv, suav nrog cov ntoo, hlau, yas thiab ntaub. Cov cuab yeej no tau coj mus siv CMC hauv kev tsim cov txheej txheej, cov nplaum thiab inks.
Cmc viscosity
Lub viscosity ntawm CMC cov kev daws teeb meem yog nyob ntawm ntau yam xws li kev xav, DS, MW, kub, thiab Ph. Feem ntau, CMC cov kev daws teeb meem tseem ceeb ntawm cov viscosities siab dua ntawm cov kev xav ntau dua, DS, thiab mw. Viscosity kuj tseem nce nrog txo qis qhov ntsuas kub thiab ph.
Lub viscosity ntawm cmc cov kev daws teeb meem yog tswj los ntawm kev sib cuam tshuam ntawm cov saw polymer thiab cov kuab tshuaj molecules hauv kev daws. CMC Molecules nrog kev sib cuam tshuam nrog cov dej lwg me me los ntawm hydrogen bonds, sib sau cov plhaub hydration ib ncig ntawm cov saw polymer. Cov quav roj kas no txo qhov kev mus ncig ntawm cov saw polymer, yog li nce lub viscosity ntawm kev daws.
Lub rheological coj cwj pwm yog cov cim los ntawm cov kab nkhaus, uas piav qhia txog kev sib raug zoo ntawm cov kev ntxhov siab ntawm shear thiab shear tus nqi ntawm kev daws. CMC cov kev daws teeb meem tsis yog-Newtonian ntws tus cwj pwm, uas txhais tau tias lawv viscosity hloov nrog shear tus nqi. Ntawm qhov qis shear cov nqi, lub viscosity ntawm cmc daws yog siab dua, thaum ntawm siab shear cov nqi, lub viscosity txo. Qhov kev coj ua no yog vim polymer chains sib txawv thiab ncab hauv qab kev nyuaj siab, ua rau txo cov kab txuas ntawm cov saw hlau thiab txo qis hauv viscosity.
Daim ntawv thov CMC
CMC tau dav siv nyob rau hauv cov chaw sib txawv vim nws qhov tshwj xeeb thiab kev coj tus cwj pwm. Nyob rau hauv kev lag luam khoom noj khoom haus, cmc yog siv los ua cov tuab, stabilizer, emulsifier thiab ntxhib los ntawm improver. Nws yog ntxiv rau cov zaub mov xws li cov dej qab zib, haus, kua ntses thiab cov khoom ci los txhim kho lawv txoj kev ntxhib los mos, lub neej thiab txee rau lawv. CMC kuj tiv thaiv kev tsim ntawm cov dej khov ua kom muaj cov zaub mov khov, ua rau cov khoom du, creamy.
Hauv kev lag luam kws tshuaj, CMC yog siv los ua cov phau ntawv, tsis sib haum thiab tswj hwm cov qauv tso tawm hauv cov ntsiav tshuaj ua qauv. Txhim kho lub tshuab nias thiab zoo nkauj ntawm cov hmoov thiab xyuas kom qhov kev sib txuam thiab ruaj khov ntawm cov ntsiav tshuaj. Vim tias nws cov mucoadhesive thiab biijohes zog, cmc kuj tau siv los ua kev zam tshwj xeeb hauv ophthalmic, qhov ntswg, thiab qhov ncauj tsim qauv.
Hauv kev lag luam ntawv, cmc yog siv los ua ntub dej xaus ntxiv, txheej binder thiab sizing xovxwm tus neeg sawv cev. It improves pulp retention and drainage, increases paper strength and density, and provides a smooth and shiny surface. CMC kuj ua raws li cov dej thiab cov roj teeb, tiv thaiv mem kua lossis lwm yam kua ntawm cov ntawv.
Hauv kev lag luam textile, cmc yog siv los ua sizing tus neeg sawv cev, luam ntawv tshuab luam ntawv, thiab zas ib. Nws txhim kho cov fiber ntau cov nplaum, txhim kho cov xim nkag thiab kho kom zoo, thiab txo cov kev txhuam hniav txhuam thiab tawv nqaij. CMC kuj tseem ua rau cov ntaub softness thiab txhav rau cov ntaub, nyob ntawm seb DS thiab MW ntawm cov polymer.
Hauv kev lag luam mining, CMC yog siv los ua cov flocculant, inhibitor thiab rheology kho hauv cov ntxhia. Nws txhim kho kev daws teeb meem thiab kev lim tawm ntawm cov khib nyiab, me me sib cais los ntawm cov av gangue, thiab cov tswj tau tawm tsam viscosity thiab kev ruaj khov. CMC yuav txo cov kev cuam tshuam ib puag ncig ntawm cov txheej txheem mining los ntawm kev siv tshuaj lom thiab dej.
Hauv kev xaus
CMC yog ib qho ntau yam ntxiv thiab muaj txiaj ntsig ntxiv tias cov khoom pov thawj tshwj xeeb thiab viscosity vim nws cov tshuaj lom neeg thiab kev sib cuam tshuam nrog dej. Nws solubility, ua yeeb yaj kiab ua yeeb yam, khi thiab nplaum nplaum kom haum rau cov ntawv thov sib txawv hauv cov zaub mov, tshuaj, ntawv, textile thiab clitors. Lub viscosity ntawm CMC cov kev daws teeb meem tuaj yeem tswj hwm los ntawm ntau yam, xws li kev xav, thiab pH, thiab tuaj yeem tsim los ntawm nws tus cwj pwm pseudoplastic thiab shear-thij-thuav tus cwj pwm. CMC muaj qhov cuam tshuam zoo rau qhov zoo, kev ua tau zoo thiab kev ruaj khov ntawm cov khoom lag luam thiab cov txheej txheem, ua rau qhov tseem ceeb ntawm kev lag luam niaj hnub.
Sijhawm Sijhawm: Sep-25-2023