Thaum teeb tsa sodium carboxymethyl cellulose (NACMC) rau ntau cov ntawv thov, ob peb cov ntsiab lus tseem ceeb yuav tsum tau pom zoo thiab kev ua tau zoo. Ntawm no yog cov chaw tseem ceeb ntawm kev saib xyuas:
Qib ntawm kev hloov pauv (DS):
Cov ntsiab lus: DS hais txog qhov nruab nrab ntawm cov carboxymethyl pawg ib pawg ntawm cov kab celluligle.
Tseem ceeb: DS cuam tshuam rau solubility, viscosity, thiab kev ua tau zoo ntawm nacmc. Cov DS ntau dua feem ntau nce solubility thiab viscosity.
Daim ntawv thov-cov kev xav tau tshwj xeeb: Piv txwv, hauv cov ntawv thov zaub mov, ib qho DS ntawm 0.95 yog qhov raug, nws yuav sib txawv raws li cov ntaub ntawv siv tshwj xeeb.
Viscosity:
Kev ntsuas kev ntsuas: Viscosity raug ntsuas raws li cov xwm txheej tshwj xeeb (piv txwv li cov siab, kub, shear tus nqi). Nco ntsoov ntsuas kev ntsuas rau kev rov ua dua tshiab.
Xaiv xaiv: Xaiv cov qauv viscosity rau koj daim ntawv thov. Qib siab viscosity yog siv rau cov qib thickening thiab ruaj khov, thaum muaj cov viscosity tsawg yog tsim nyog rau cov ntawv thov tiv taus.
Purity:
Cov kab mob: Saib xyuas rau impurities xws li salts, siv cov cellulose, thiab cov khoom lag luam. High-purity nacmc yog qhov tseem ceeb rau cov khoom siv thiab khoom siv khoom noj.
Ua raws li: kom ua raws li cov qauv kev coj noj coj ua (piv txwv li, USP, EP, lossis cov khoom noj-qib).
Loj me me loj:
Qhov kev tshem tawm tus nqi: Finer ua rau yaj tawm sai dua tab sis yuav ua rau kev sib tw (piv txwv li, plua plav tsim). Coarser faib tawm yaj qeeb dua tab sis yooj yim dua los lis.
Daim ntawv thov haum: phim lub particle loj rau daim ntawv thov yuav tsum tau ua. Cov hmoov zoo feem ntau nyiam nyob rau hauv cov ntawv thov yuav tsum muaj kev xaus sai.
Pho stability:
Ntas yeej muaj peev xwm: NACMC tuaj yeem ua tsis tau pH hloov pauv, tab sis nws cov kev ua tau zoo tuaj yeem sib txawv nrog PH. Kev ua tau zoo tshaj plaws yog feem ntau nyob ib ncig ntawm pH (6-8).
Kev sib raug zoo: Ua kom haum nrog cov ph kis ntawm qhov kawg siv ib puag ncig. Qee cov ntawv thov yuav xav tau cov kev kho kom zoo rau kev ua tau zoo tshaj plaws.
Kev sib cuam tshuam nrog lwm cov khoom xyaw:
Synergistic cuam tshuam: NACMC tuaj yeem cuam tshuam cov synergistically nrog lwm cov pa hydrocolloids (piv txwv li xanthan ntawm cov pos hniav) los hloov kho cov qauv thiab ruaj khov.
Kev tsis tiav: Ceev faj txog kev tsis sib xws nrog lwm cov khoom xyaw, tshwj xeeb tshaj yog nyob rau hauv cov qauv sib xyaw.
Solubility thiab npaj:
Txoj kev tshem tawm: Ua lawv cov txheej txheem pom zoo kom yaj nacmc kom tsis txhob muaj clumping. Feem ntau, NACMC tau ntxiv qeeb rau cov dej ntxhov siab ntawm qhov kub kub.
Hydration lub sijhawm: Cia lub sijhawm txaus rau cov dej ua tiav, raws li cov dej khov ua tsis tiav tuaj yeem cuam tshuam kev ua haujlwm.
Thermal Stability:
Qhov ntsuas kub: NACMC feem ntau nyob ruaj khov dua qhov kub thiab txias ntau yam kub thiab ntev ntev tuaj yeem ua rau nws cov viscosity thiab ua haujlwm.
Cov xwm txheej thov: Xav txog cov mob thermal ntawm koj daim ntawv thov kom ntseeg tau tias muaj kev ruaj ntseg thiab ua tau zoo.
Kev cai tswjfwm thiab kev nyab xeeb:
Ua raws cai: kom ntseeg tau tias NACM PC tau siv ua raws li cov kev tswj hwm uas muaj feem cuam tshuam rau nws siv (piv txwv li FDA, EFSA).
Kev Nyab Xeeb Cov Ntawv Qhia (SDS): Tshuaj xyuas thiab ua raws cov ntaub ntawv ntaub ntawv kev nyab xeeb ntawm kev tuav thiab chaw khaws khoom.
Kev Cia Cai Cia:
Qhov chaw ib puag ncig: Khaws cia rau hauv qhov chaw txias, qhuav kom tiv thaiv kev nqus dej noo thiab kev tsis yeem.
Ntim: Siv cov ntim khoom kom tsim nyog tiv thaiv kev tiv thaiv kev sib kis thiab ib puag ncig ib puag ncig.
Los ntawm ua tib zoo xav txog cov xwm txheej no, koj tuaj yeem kho cov kev ua tau zoo thiab haum cov sodium carboxymethyl cellulose rau koj daim ntawv thov.
Lub Sijhawm Post: Tsib Hlis-25-2024