▲Hydroxypropyl methyl cellulose (HPMC)yog ib qho hmoov dawb uas tsis muaj ntxhiab, tsis muaj saj, thiab tsis muaj tshuaj lom. Tom qab yaj tag nrho hauv dej, hydroxypropyl methyl cellulose yuav tsim ib qho colloid viscous pob tshab.
▲ Cov khoom siv tseem ceeb ntawm hydroxypropyl methyl cellulose (HPMC): paj rwb zoo, methyl chloride, propylene oxide, thiab lwm yam khoom siv raw, caustic soda, acid, toluene, isopropanol, thiab lwm yam.
Kev sib piv ntawm qhov zoo thiab qhov tsis zoo ntawm hydroxypropyl methyl cellulose:
1. Cov hydroxypropyl methyl cellulose HPMC ntshiab yog xoob pom thiab muaj qhov ceev me me, nrog rau qhov ntsuas ntawm 0.3–0.4 / ml.
HPMC uas raug muab tshuaj lom neeg muaj qhov fluidity zoo heev thiab zoo li hnyav dua, uas txawv ntawm cov khoom tiag tiag hauv qhov tsos.
2. Cov kua hydroxypropyl methyl cellulose HPMC ntshiab yog qhov tseeb, lub teeb ci ntsa iab, tus nqi khaws cia dej> 97%.
Cov kua dej HPMC uas tau muab tso rau hauv dej yog qias neeg heev, thiab qhov ceev ntawm kev khaws dej nyuaj rau ncav cuag 80%.
3. HPMC ntshiab yuav tsum tsis txhob muaj ntxhiab tsw ntawm ammonia, hmoov txhuv nplej siab thiab cawv.
HPMC uas raug adulterated feem ntau tuaj yeem hnov txhua yam tsw qab, txawm tias nws tsis muaj saj, nws yuav hnov qhov hnyav.
4. Hmoov hydroxypropyl methyl cellulose HPMC ntshiab yog fibrous nyob rau hauv lub tshuab microscope lossis magnifying iav.
HPMC uas raug adulterated tuaj yeem pom tau tias yog cov khoom khov lossis cov siv lead ua nyob rau hauv lub tshuab microscope lossis lub iav loj.
Los ntawm cov yam twg los txheeb xyuas qhov zoo thiab qhov tsis zoo ntawm hydroxypropyl methyl cellulose?
1. qib dawb
Txawm hais tias qhov dawb tsis tuaj yeem txiav txim siab seb HPMC puas yooj yim siv, thiab yog tias cov neeg sawv cev dawb ntxiv thaum lub sijhawm tsim khoom, nws yuav cuam tshuam rau nws qhov zoo. Txawm li cas los xij, feem ntau ntawm cov khoom zoo muaj qhov dawb zoo.
2. Zoo nkauj
Feem ntau, HPMC muaj qhov zoo nkauj ntawm 80 mesh thiab 100 mesh, thiab qhov zoo dua qhov zoo nkauj, feem ntau hais lus, qhov zoo dua.
3. Kev xa mus
Muab tsoHydroxypropyl methyl cellulose (HPMC)rau hauv dej kom tsim tau ib lub pob tshab colloid, thiab xyuas nws lub teeb transmittance. Lub teeb transmittance siab dua, qhov zoo dua, qhia tias muaj tsawg dua cov tshuaj insoluble hauv nws. Lub permeability ntawm ntsug reactors feem ntau zoo, thaum ntawm kab rov tav reactors yog qhov phem dua.
4. Kev faib ua feem
Qhov loj dua qhov hnyav tshwj xeeb, qhov hnyav dua qhov zoo dua. Qhov tshwj xeeb yog loj, feem ntau vim tias cov ntsiab lus ntawm hydroxypropyl pawg hauv nws yog siab, thiab cov ntsiab lus ntawm hydroxypropyl pawg yog siab, cov dej khaws cia zoo dua.
Lub sijhawm tshaj tawm: Plaub Hlis-25-2024