Txhawm rau piv CMC (Carboxymethylcelleculose) thiab Holmc (HydroxyprropenCelulose), peb yuav tsum nkag siab lawv cov khoom, kev siv, tsis zoo, thiab siv cov ntaub ntawv siv. Ob chav ntawm lub cellulose tau siv dav hauv ntau yam lag luam, suav nrog cov tshuaj, suav nrog cov khoom noj, cov tshuaj pleev thiab kev tsim kho. Txhua tus muaj cov khoom tshwj xeeb uas ua rau lawv haum rau cov laj thawj sib txawv. Cia peb ua qhov kev sib piv nyob rau hauv-tob tau sib piv pom tias ib qho twg yog qhov zoo dua hauv cov xwm txheej sib txawv.
1. Kev txhais thiab cov qauv:
CMC (Carboxymetylcellose): CMC yog cov dej-soluble cellulose derivative ua los ntawm cov tshuaj tiv thaiv ntawm cellulose thiab chloroacetic acid. Nws muaj cov pab pawg carboxymethyl (-ch2-npo raug sib tsoo rau qee pab pawg hydroxyl ntawm cov glucopyranose monomers uas ua rau lub cellulose caj qaum.
HPMC (HydroxyPropyyl methylcellose): HPMC kuj yog cov dej-soluble cellulose derivative uas tau ua los ntawm kev kho cellulose nrog cov tshuaj pleev xim rau cov epylene thiab methyl chloride. Nws muaj cov pab pawg hydropropyl thiab methoxy cov pab pawg txuas nrog lub cellulose caj qaum.
2. Solubility:
CMC: Cov dej khov heev hauv dej, sib sau ua pob tshab, daws. Nws ua kom pom kev coj tus cwj pwm heev, uas txhais tau tias nws viscosity txo qis nyob rau hauv shear kev nyuaj siab.
HPMC: Kuj soluble hauv dej, sib sau ib qho kev daws teeb meem me ntsis dua li cmc. Nws tseem ua pov thawj pseudopastic cwj pwm.
3.Rheological yam ntxwv:
CMC: Cov ntaub ntawv nthuav tawm shear thinning tus cwj pwm, uas txhais tau hais tias nws viscosity txo qis nrog nce shear tus nqi. Cov cuab yeej no ua rau nws haum rau cov ntawv thov uas yuav tsum tau daws tau yooj yim hauv qab shear, xws li cov xim av, xab npum thiab tshuaj.
HPMC: Kev nthuav qhia cov kev coj tus cwj pwm zoo sib xws rau CMC, tab sis nws viscosity yog feem ntau siab dua ntawm cov kev ua kom tsawg. Nws muaj cov yeeb yaj kiab zoo dua qub, ua kom haum rau kev siv xws li txheej, cov nplaum thiab cov tshuaj lom neeg.
4. Stability:
CMC: Feem ntau ruaj khov tshaj li ntau ntau ntawm PH thiab kub. Nws tuaj yeem tiv thaiv theem ntawm cov electrolytes.
HPMC: Ntau ruaj khov dua li CMC nyob rau hauv acidic tej yam kev mob, tab sis tuaj yeem yauv nyom nyob rau hauv Alkaline tej yam kev mob. Nws tseem nkag siab rau cov neeg sib txawv, uas tuaj yeem ua rau kev taw qhia lossis nag lossis daus.
5. Thov:
CMC: Siv dav ua tuab, stabilizer thiab dej-khaws cov neeg sawv cev hauv cov zaub mov (xws li cov ntsiav tshuaj, raug tshem tawm (tshuaj pleev li cas), tshuaj pleev ib ce).
HPMC: Feem ntau siv hauv cov khoom siv tsim kho (piv txwv li, muab cov tshuaj khib nyiab, cug, tshuaj khib nyiab (piv txwv li, tshuaj pleev ib ce, cov khoom siv kho tawv nqaij).
6. TOxicity thiab kev nyab xeeb:
CMC: Feem ntau raug lees paub tias muaj kev nyab xeeb (Gras) los ntawm cov koom haum tswj hwm thaum siv nyob rau hauv cov kev txwv thiab kev siv tshuaj. Nws yog biodegradable thiab non-toxic.
HPMC: Kuj suav tias muaj kev nyab xeeb rau kev noj nyob hauv kev pom zoo kom txwv. Nws yog biocompe thiab dav siv nyob rau hauv lub chaw muag tshuaj raws li kev tswj hwm tus neeg sawv cev thiab cov ntsiav tshuaj.
7. Tus nqi thiab muaj:
CMC: Feem ntau tus nqi ua tau zoo dua HPMC. Nws yog yooj yim muaj los ntawm cov khoom sib txawv thoob ntiaj teb.
HPMC: me ntsis kim vim nws cov txheej txheem ntau lawm thiab qee zaum kev txwv los ntawm qee cov neeg xa khoom.
8. Kev cuam tshuam ib puag ncig:
CMC: biodegradable, muab tau los ntawm cov khoom siv tau yooj yim dua tshiab (cellulose). Nws suav tias yog ib puag ncig zoo.
HPMC: Kuj muaj biodegradable thiab muab tau los ntawm cellulose, yog li kuj yog ib puag ncig ib puag ncig.
Ob CMC thiab HPMC muaj cov khoom tshwj xeeb uas ua rau lawv muaj txiaj ntsig ntxiv hauv ntau kev lag luam. Qhov kev xaiv ntawm lawv nyob ntawm cov kev xav tau tshwj xeeb xws li solubility, viscosity, kev ruaj ntseg thiab kev txiav txim siab. Feem ntau, CMC yuav tau nyiam vim nws tus nqi qis, dav ua rau cov khoom noj khoom haus rau khoom noj thiab kev siv tshuaj pleev cov khoom noj. HPMC, ntawm qhov tod tes, tej zaum yuav tau nyiam rau nws cov viscosity ntau dua, thiab cov ntawv thov ua yeeb yaj kiab zoo dua, thiab cov ntawv thov hauv cov khoom siv. Thaum kawg, xaiv yuav tsum yog raws li kev txiav txim siab ntawm cov xwm txheej thiab sib xyaw nrog kev siv.
Lub Sijhawm Post: Feb-21-2024