Cov lus nug nquag nug txog HPMC

Hydroxypropyl methyl cellulose muab faib ua ntau hom, thiab qhov sib txawv ntawm nws siv yog dab tsi?

HPMC tuaj yeem muab faib ua hom instant thiab kub yaj.Cov khoom tam sim no tawg sai sai hauv dej txias thiab ploj mus rau hauv dej.Lub sijhawm no, cov kua dej tsis muaj viscosity, vim tias HPMC tsuas yog tawg hauv dej thiab tsis yaj tiag tiag.Tom qab li 2 feeb (thirring), viscosity ntawm cov kua maj mam nce, tsim ib pob tshab dawb viscous colloid.Cov khoom kub soluble tuaj yeem tawg sai sai hauv dej kub thiab ploj hauv dej kub thaum lawv agglomerated hauv dej txias.Thaum qhov kub thiab txias poob rau qee qhov kub (raws li gel kub ntawm cov khoom), viscosity maj mam tshwm kom txog thaum lub pob tshab viscous colloid tsim.

Yuav ua li cas txiav txim qhov zoo ntawm hydroxypropyl methyl cellulose yooj yim thiab intuitively?

Dawb.Txawm hais tias kev ua kom dawb tsis tuaj yeem txiav txim siab seb HPMC puas siv tau yooj yim, thiab yog tias cov tshuaj ntxuav hniav dawb ntxiv rau hauv cov txheej txheem tsim khoom, nws yuav cuam tshuam rau nws cov khoom zoo, feem ntau cov khoom zoo muaj cov xim dawb.

Fineness: qhov zoo ntawm HPMC feem ntau yog 80 mesh thiab 100 mesh, thiab 120 mesh tsawg dua.Qhov finer qhov fineness, qhov zoo.

Lub teeb xa hluav taws xob: tom qab HPMC muab tso rau hauv dej los tsim cov pob tshab colloid, saib nws lub teeb xa hluav taws xob.Qhov loj dua lub teeb transmittance, qhov zoo dua.Nws txhais tau hais tias muaj tsawg insoluble tshuaj nyob rau hauv nws.Kev xa tawm ntawm lub tshuab hluav taws xob ntsug feem ntau yog qhov zoo, thiab cov kab rov tav reactor yog qhov phem dua.Txawm li cas los xij, nws tsis tau txhais hais tias qhov zoo ntawm ntsug reactor zoo dua li ntawm cov kab rov tav reactor.Muaj ntau yam uas txiav txim siab txog cov khoom zoo.

Lub ntiajteb txawj nqus tshwj xeeb: qhov loj dua qhov tshwj xeeb lub ntiajteb txawj nqus yog, qhov hnyav dua, qhov zoo dua.Feem ntau, nws yog vim cov ntsiab lus ntawm hydroxypropyl nyob rau hauv nws siab.Yog tias cov ntsiab lus ntawm hydroxypropyl yog siab, cov dej tuav tau zoo dua.

Lub ntiajteb txawj nqus tshwj xeeb: qhov loj dua qhov tshwj xeeb lub ntiajteb txawj nqus yog, qhov hnyav dua, qhov zoo dua.Feem ntau, nws yog vim cov ntsiab lus ntawm hydroxypropyl nyob rau hauv nws siab.Yog tias cov ntsiab lus ntawm hydroxypropyl yog siab, cov dej tuav tau zoo dua.

Yuav ua li cas yog cov txheej txheem dissolution ntawm hydroxypropyl methyl cellulose?

Txhua tus qauv tuaj yeem muab ntxiv rau cov khoom siv los ntawm kev sib xyaw qhuav;

Thaum nws yuav tsum tau muab tso ncaj qha rau hauv cov tshuaj aqueous ntawm chav tsev kub, nws yog qhov zoo dua los siv cov dej txias dispersion hom.Feem ntau, nws tuaj yeem ua kom tuab li 10-90 feeb tom qab ntxiv ( stirring )

Cov qauv zoo tib yam tuaj yeem yaj tom qab sib tov thiab dispersing nrog dej kub, ntxiv dej txias, nplawm thiab txias;

Yog hais tias caking thiab qhwv tshwm sim thaum lub sij hawm dissolution, nws yog vim tsis txaus sib tov los yog zoo tib yam qauv yog ncaj qha ntxiv rau cov dej txias.Lub sijhawm no, nws yuav tsum tau stirred sai.

Yog tias cov npuas raug tsim tawm thaum lub sijhawm tawg, lawv tuaj yeem raug tshem tawm los ntawm kev sawv ntsug li 2-12 teev (lub sijhawm tshwj xeeb nyob ntawm qhov sib xws ntawm cov tshuaj), nqus, nias thiab lwm txoj hauv kev, lossis ntxiv qhov tsim nyog ntawm defoamer.

Hydroxypropyl methyl cellulose ua lub luag haujlwm li cas hauv kev siv cov hmoov putty, thiab seb puas muaj chemistry?

Nyob rau hauv lub putty hmoov, nws plays peb lub luag hauj lwm: thickening, dej tuav thiab kev tsim kho.Thickening, cellulose tuaj yeem ua kom tuab, ua lub luag haujlwm ntawm kev ncua, ua kom cov tshuaj sib txawv nce thiab nqis, thiab tiv thaiv sagging.Kev tuav dej: ua kom cov hmoov qhuav qhuav maj mam, thiab pab cov txiv qaub calcium kom hnov ​​​​qab hauv dej.Kev tsim kho: cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua cov hmoov putty muaj kev ua haujlwm zoo.HPMC tsis koom nrog cov tshuaj tiv thaiv tshuaj, tab sis tsuas yog ua lub luag haujlwm pabcuam.

Lub gel kub ntawm hydroxypropyl methyl cellulose cuam tshuam li cas?

Lub gel kub ntawm HPMC muaj feem xyuam rau nws cov ntsiab lus methoxyl.Qhov qis dua cov ntsiab lus methoxyl, qhov kub ntawm gel yog siab dua.

Puas muaj kev sib raug zoo ntawm kev tso cov hmoov putty thiab hydroxypropyl methyl cellulose?

Nws tseem ceeb !!!HPMC muaj cov dej tuav tsis zoo, uas yuav ua rau cov hmoov poob.

Daim ntawv thov ntawm hydroxypropyl methyl cellulose nyob rau hauv putty hmoov, yog vim li cas rau cov npuas nyob rau hauv putty hmoov?

HPMC plays peb lub luag haujlwm hauv cov hmoov putty: thickening, dej tuav thiab kev tsim kho.Cov laj thawj rau npuas yog raws li nram no:

Ntxiv dej ntau dhau lawm.

Yog tias koj txhuam lwm txheej rau hauv qab txheej ua ntej nws qhuav, nws kuj yog ib qho yooj yim rau blister.