Yuav ua li cas txheeb xyuas qhov zoo HPMC?

Txheeb xyuas qhov zoo ntawmHydroxyPropylropy Cellulose (HPMC)koom nrog txiav txim siab ntau yam tseem ceeb. HPMC yog siv nyob rau hauv ntau yam kev lag luam, suav nrog kev tsim kho, tshuaj, khoom noj, thiab tshuaj pleev ib ce, thiab nws cov tshuaj pleev tau zoo tuaj yeem ua haujlwm ntawm cov khoom kawg. Nov yog qee qhov tseem ceeb los txiav txim siab thaum ntsuas qhov zoo HPMC:

1. Qeb ntawm qhov hloov chaw (DS):

Cov degree ntawm kev hloov pauv yog hais txog tus naj npawb nruab nrab ntawm hydroxypropyl thiab methyl pawg ib pawg ntawm cov qauv cellulogulig. Nws cuam tshuam ncaj qha rau cov khoom ntawm HPMC. Cov nqi DS cov nqi ntau dua feem ntau ua rau cov dej solubility nce ntxiv thiab hloov ua ntu zus. Cov neeg tsim khoom lag luam ib yam qhia meej DS ntawm lawv cov khoom HPMC.

2. Molecular hnyav:

Lub cev hnyav molecular ntawm HPMC yog qhov tseem ceeb rau nws ua tau zoo. Qhov hnyav dua feem ntau yog feem ntau cuam tshuam nrog kev ua yeeb yaj kiab zoo dua thiab muaj viscosity ntau ntxiv. Cov khoom siv hluav taws xob molecular yuav tsum tau sib xws nyob rau hauv ib qho kev faib tawm rau kev muab HPMC cov khoom lag luam.

3. Viscosity:

HPMC muaj nyob rau qib Viscosity, thiab kev xaiv viscosity nyob ntawm cov ntawv thov tshwj xeeb. Viscosity yog ib qho tseem ceeb heev cuam tshuam qhov kev ntws thiab rheological kev coj cwj pwm ntawm cov kev daws teeb meem lossis kev faib tawm muaj HPMC. Cov viscosity feem ntau ntsuas siv cov qauv qauv, thiab cov tuam ntxhab muab cov tshuaj viscosity rau lawv cov khoom.

4. Paus taus loj:

Lub particle loj ntawm HPMC tuaj yeem cuam tshuam nws qhov kev tsis txaus siab thiab cov khoom sib cais. Cov nplai me me feem ntau ua rau muaj kev cuam tshuam zoo dua hauv dej lossis lwm yam kuab tshuaj. Cov neeg tsim khoom yuav muab cov ntaub ntawv ntawm qhov loj me faib ntawm lawv HPMC cov khoom lag luam.

5. Purity thiab impurities:

Siab HPMC yuav tsum muaj qib siab ntawm kev coj dawb huv, nrog tsawg kawg impurities. Muaj cov kab mob tsis huv lossis pib siv cov khoom pib tuaj yeem cuam tshuam kev ua haujlwm ntawm HPMC hauv ntau yam kev siv. Cov ntaub ntawv feem ntau muab cov ntaub ntawv hais txog lawv cov khoom HPMC.

6. Gelation kub:

Qee tus HPMC cov qhab nia nthuav tawm thermal gelation tus cwj pwm, ua cov tshuaj pleev rau ntawm ntug dej kub. Lub gelation kub yog qhov chaw tseem ceeb, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov uas kub yuav tshwm sim thaum ua tiav. Gelation cov khoom yuav tsum muaj raws li thiab hauv cov ntau yam.

7. Solubility:

HPMC paub txog nws cov dej-soluble cov khoom, tab sis tus nqi thiab cov solubility tuaj yeem sib txawv. Zoo HPMC yuav tsum zom kom muaj dej los yog lwm cov kuab tshuaj uas muaj peev xwm ua tau. Solubility tuaj yeem cuam tshuam los ntawm DS thiab lwm yam.

8. Daim ntawv thov-cov khoom tshwj xeeb:

Qhov zoo tshaj ntawm HPMC feem ntau tau soj ntsuam raws nws cov kev ua tau zoo hauv cov ntawv thov. Piv txwv li:

• Nyob rau hauv kev kho cov kev siv, xws li cug lossis EIFS, yam zoo li dej cia, kev ua haujlwm, thiab cov tshuaj nplaum yog qhov tseem ceeb heev.
• Hauv cov ntawv thov tshuaj, tswj cov tshuaj tso tawm thiab cov ntsiav tshuaj txheej txheem yog qhov tseem ceeb.
• Hauv cov khoom noj thiab cov ntaub ntawv pleev ib ce, kev ua haujlwm zoo li cov tuab tuab thiab ruaj khov yog qhov tseem ceeb.

9. Chaw tsim tshuaj paus pib:

Xaiv HPMC los ntawm cov npe nrov yog qhov tseem ceeb rau kev ua kom zoo. Tsim cov tuam ntxhab nrog cov keeb kwm ntawm kev ua cov khoom zoo cellulose derivatives muaj peev xwm txhim khu kev qha thiab zoo ib yam.

10. Kuaj thiab Ntawv Pov Thawj:

Kev kuaj sim thiab cov ntawv pov thawj los ntawm lees paub cov koom haum cov koom haum tuaj yeem nthuav tawm kev lees paub ntawm HPMC zoo. Cov ntawv pov thawj yuav muab cov ntaub ntawv pov thawj ntawm kev tsom xam lossis ua raws li cov qauv tshwj xeeb.

Xaus:

Kev ntsuas HPMC cuam tshuam nrog kev ntsuas nws lub cev thiab tshuaj siv tshuaj, nkag siab txog kev cai tshwj xeeb, thiab xav txog lub koob npe nrov ntawm cov khw. Nws yog ib qho tseem ceeb kom xa cov khoom lag luam tshwj xeeb, daim ntawv pov thawj kev tshuaj xyuas, thiab cov lus qhia kev siv rau cov ntaub ntawv HPMC tshwj xeeb.