Qhov zoo ntawmHydroxypropyl methylcellulose (HPMC)tuaj yeem soj ntsuam los ntawm ntau yam ntsuas. HPMC yog cov cellulose derivative siv dav hauv kev tsim kho, tshuaj, khoom noj thiab tshuaj pleev ib ce, thiab nws qhov zoo cuam tshuam ncaj qha rau kev ua tau zoo ntawm cov khoom.
1. Qhov tsos thiab qhov loj ntawm cov khoom me me
Cov tsos ntawm HPMC yuav tsum yog hmoov dawb lossis dawb tawm amorphous. Cov hmoov HPMC zoo yuav tsum muaj cov khoom sib xws, tsis muaj agglomeration, thiab tsis muaj cov khoom tsis huv. Qhov loj me thiab kev sib xws ntawm cov khoom cuam tshuam rau nws cov solubility thiab dispersibility. HPMC nrog cov khoom loj dhau lossis agglomerated tsis tsuas yog cuam tshuam rau solubility, tab sis kuj tseem yuav ua rau muaj kev cuam tshuam tsis sib xws hauv kev siv tiag tiag. Yog li ntawd, qhov loj me ntawm cov khoom sib xws yog lub hauv paus rau kev ntsuam xyuas nws qhov zoo.
2. Kev yaj dej thiab kev yaj sai
Qhov dej yaj ntawm HPMC yog ib qho ntawm nws cov cim qhia kev ua tau zoo tseem ceeb. HPMC zoo yaj sai dua hauv dej, thiab cov tshuaj yaj yuav tsum pob tshab thiab sib xws. Kev sim dej yaj tuaj yeem txiav txim siab los ntawm kev ntxiv qee qhov HPMC rau hauv dej thiab saib seb nws puas yaj sai thiab tsim cov tshuaj ruaj khov. Kev yaj qeeb lossis cov tshuaj tsis sib xws txhais tau tias qhov zoo ntawm cov khoom tsis ua raws li tus qauv.
3. Cov yam ntxwv ntawm viscosity
Qhov viscosity ntawm HPMC yog ib qho ntawm cov yam ntxwv tseem ceeb rau kev ntsuam xyuas nws qhov zoo. Nws cov viscosity hauv dej feem ntau nce nrog qhov nce ntawm nws qhov hnyav molecular. Txoj kev ntsuas viscosity feem ntau yog siv lub rotational viscometer lossis viscometer los ntsuas cov nqi viscosity ntawm cov tshuaj ntawm ntau qhov sib txawv. Feem ntau hais lus, HPMC zoo yuav tsum muaj viscosity ruaj khov, thiab qhov hloov pauv viscosity nrog qhov nce ntawm concentration yuav tsum ua raws li qee txoj cai. Yog tias viscosity tsis ruaj khov lossis qis dua tus qauv, nws txhais tau tias nws cov qauv molecular tsis ruaj khov lossis muaj cov khoom tsis huv.
4. Cov dej noo noo
Cov dej noo hauv HPMC kuj tseem yuav cuam tshuam rau nws qhov zoo. Cov dej noo ntau dhau yuav ua rau nws pwm lossis lwj thaum lub sijhawm khaws cia. Tus qauv rau cov dej noo feem ntau yuav tsum tswj tau hauv 5%. Cov txheej txheem sim xws li txoj kev ziab lossis Karl Fischer txoj kev tuaj yeem siv los txiav txim siab cov dej noo. HPMC zoo muaj cov dej noo tsawg thiab tseem qhuav thiab ruaj khov.
5. Tus nqi pH ntawm cov tshuaj
Tus nqi pH ntawm cov tshuaj HPMC kuj tseem tuaj yeem qhia txog nws qhov zoo. Feem ntau, tus nqi pH ntawm cov tshuaj HPMC yuav tsum nyob nruab nrab ntawm 6.5 thiab 8.5. Cov kua qaub ntau dhau lossis alkaline ntau dhau yuav qhia tau tias cov khoom muaj cov khoom siv tshuaj tsis huv lossis tau kho tsis raug thaum lub sijhawm tsim khoom. Los ntawm kev kuaj pH, koj tuaj yeem nkag siab zoo seb qhov zoo ntawm HPMC puas ua tau raws li qhov yuav tsum tau ua.
6. Cov ntsiab lus tsis huv
Cov ntsiab lus tsis huv ntawm HPMC cuam tshuam ncaj qha rau nws cov kev ua tau zoo, tshwj xeeb tshaj yog hauv kev kho mob thiab zaub mov, qhov twg cov ntsiab lus tsis huv tsis tsim nyog yuav ua rau cov khoom tsis muaj kev nyab xeeb lossis cov teebmeem tsis zoo. Cov khoom tsis huv feem ntau suav nrog cov khoom siv raw tsis tau teb tsis tiav, lwm yam tshuaj lom neeg, lossis cov khoom tsis huv uas tsim thaum lub sijhawm tsim khoom. Cov ntsiab lus tsis huv hauv HPMC tuaj yeem kuaj pom los ntawm cov txheej txheem xws li cov kua chromatography ua haujlwm siab (HPLC) lossis roj chromatography (GC). HPMC zoo yuav tsum xyuas kom meej tias cov ntsiab lus tsis huv qis thiab ua tau raws li cov qauv cuam tshuam.
7. Kev pob tshab thiab kev ruaj khov ntawm kev daws teeb meem
Qhov kev xa tawm ntawm HPMC kua kuj yog ib qho cim qhia txog kev zoo uas siv ntau. Ib qho kua uas muaj pob tshab thiab ruaj khov feem ntau txhais tau tias HPMC yog qhov huv siab thiab muaj tsawg dua qhov tsis huv. Cov kua yuav tsum tseem meej thiab pob tshab thaum lub sijhawm khaws cia ntev, tsis muaj nag lossis turbidity. Yog tias cov kua HPMC precipitates lossis dhau los ua turbid thaum lub sijhawm khaws cia, nws qhia tau tias nws yuav muaj ntau yam khoom tsis muaj zog lossis cov khoom tsis huv.
8. Kev ruaj khov ntawm thermal thiab qhov kub thiab txias ntawm thermal decomposition
Feem ntau qhov kev sim thermal stability yog ua los ntawm thermogravimetric analysis (TGA). HPMC yuav tsum muaj thermal stability zoo thiab yuav tsum tsis txhob lwj ntawm qhov kub thiab txias ib txwm muaj. HPMC nrog qhov kub thiab txias thermal decomposition qis yuav ntsib kev puas tsuaj ntawm kev ua haujlwm hauv cov ntawv thov kub siab, yog li thermal stability zoo yog qhov tseem ceeb ntawm HPMC zoo.
9. Kev sib xyaw ua ke ntawm cov tshuaj thiab qhov nro ntawm qhov chaw
Qhov kev nruj ntawm qhov chaw ntawm HPMC kua tuaj yeem cuam tshuam rau nws cov kev ua tau zoo ntawm daim ntawv thov, tshwj xeeb tshaj yog hauv cov txheej thiab cov ntaub ntawv tsim kho. HPMC zoo muaj qhov kev nruj ntawm qhov chaw qis tom qab yaj, uas pab txhim kho nws qhov kev sib kis thiab kev ntws hauv ntau yam xov xwm. Nws qhov kev nruj ntawm qhov chaw tuaj yeem kuaj tau los ntawm lub ntsuas kev nruj ntawm qhov chaw. Cov kua HPMC zoo tagnrho yuav tsum muaj qhov kev nruj ntawm qhov chaw qis thiab ruaj khov.
10. Kev ruaj khov thiab kev cia khoom
Qhov ruaj khov ntawm HPMC kuj tseem tuaj yeem cuam tshuam nws qhov zoo. HPMC zoo yuav tsum khaws cia ruaj khov rau lub sijhawm ntev yam tsis muaj kev puas tsuaj lossis kev ua haujlwm poob qis. Thaum ua qhov kev tshuaj xyuas zoo, nws qhov ruaj khov tuaj yeem soj ntsuam los ntawm kev khaws cov qauv rau lub sijhawm ntev thiab sim lawv cov kev ua haujlwm tsis tu ncua. Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig nrog cov av noo siab lossis kev hloov pauv kub loj, HPMC zoo yuav tsum muaj peev xwm tswj tau lub cev thiab tshuaj lom neeg ruaj khov.
11. Kev sib piv ntawm cov txiaj ntsig sim nrog cov qauv kev lag luam
Thaum kawg, ib txoj hauv kev yooj yim tshaj plaws los txiav txim siab qhov zoo ntawm HPMC yog piv rau cov qauv kev lag luam. Nyob ntawm thaj chaw thov (xws li kev tsim kho, tshuaj, khoom noj, thiab lwm yam), cov qauv zoo ntawm HPMC txawv. Thaum xaiv HPMC, koj tuaj yeem xa mus rau cov qauv thiab cov txheej txheem sim thiab muab cov txiaj ntsig sim ua ke los txiav txim siab txog nws qhov zoo.
Kev ntsuam xyuas qhov zoo ntawmHPMCYuav tsum xav txog ntau yam, suav nrog qhov tsos, solubility, viscosity, impurity content, pH value, noo noo content, thiab lwm yam. Los ntawm ntau txoj kev xeem txheem, qhov zoo ntawm HPMC tuaj yeem txiav txim siab tau zoo dua. Rau cov kev xav tau ntawm ntau daim ntawv thov, qee qhov kev ua tau zoo tshwj xeeb kuj yuav tsum tau them sai sai rau. Kev xaiv cov khoom HPMC uas ua tau raws li cov qauv cuam tshuam tuaj yeem ua kom ntseeg tau tias qhov zoo thiab ruaj khov ntawm cov khoom kawg.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-19-2024