Dissolving hydroxypropyyl methylcellose (HPMC) yuav tsum nkag siab txog cov khoom uas tsim nyog thiab xaiv cov kuab tshuaj uas tsim nyog. HPMC yog lub cellulose derivative dav siv hauv cov tshuaj, khoom noj, thiab ntau daim ntaub ntawv muaj ntau. Nws yog soluble hauv dej tab sis muaj cov khoom siv gel zoo.
Cov yam ntxwv ntawm hydroxypropyf methylcellulose (HPMC):
Tus qauv tshuaj:
HPMC yog ib nrab hluavtaws dej-soluble polymer muab tau los ntawm cellulose. Nws muaj ob ntu loj:
Cellulose caj qaum: muab cov qauv kev ncaj ncees.
HydroxyPropyl thiab methyl chaw: Hloov solubility thiab rheological cov khoom.
Solubility:
HPMC Cov Khoom Taw Qhia Cov Khoom Siv Zoo Txawm li cas los xij, tus lej xaus yuav sib txawv nyob ntawm cov yam kub xws li qhov ntsuas kub xws li qhov ntsuas kub, HPMC qib, thiab muaj ntawm lwm cov tshuaj.
Gel tsim cov khoom:
Ntxiv rau kev ua ib lub soluble polymer, HPMC tseem tuaj yeem tsim cov tshuaj pleev nyob rau hauv lub xub ntiag ntawm qee yam lossis ntawm qhov kub-ua rau kub. Cov cuab yeej no yog qhov tseem ceeb hauv kev siv khoom noj thiab khoom noj.
Yam cuam tshuam rau HPMC qhov sib cais:
kub:
Feem ntau, siab dua kub nce ntxiv kev xaus ntawm HPMC. Txawm li cas los xij, huab cua sov heev tuaj yeem ua rau kev taw qhia, cuam tshuam kev daws teeb meem.
Ph:
HPMC yog qhov ruaj khov tshaj li qhov dav dav. Txawm li cas los xij, cov acidic lossis alkaline tej zaum yuav cuam tshuam nws cov kev sib cais. Feem ntau, ib qho nruab nrab lossis me ntsis alkaline pH yog nyiam rau kev pom kev zoo nkauj.
Polymer Qib:
Cov qib sib txawv ntawm HPMC muaj cov hnyav hnyav thiab cov qib hloov pauv, cuam tshuam rau lawv solubility. Qis cov roj hnyav hnyav cov qhab nia feem ntau yaj nrawm dua.
Loj me me loj:
Txo qhov me me ntawm HPMC nce thaj chaw thaj tsam muaj rau cov kev sib cais, yog li ua kom nrawm dua cov txheej txheem.
Muaj ntsev:
Qee cov ntsev, xws li sodium chloride, tuaj yeem cuam tshuam HPMC sib cais. Lawv tuaj yeem txhim kho lossis cuam tshuam cov txheej txheem, nyob ntawm cov xwm txheej tshwj xeeb.
Cov kuab tshuaj rau DUAB HPMC:
Dej:
HPMC yog feem ntau soluble hauv dej, sib sau ua kom pom tseeb, pleev xim. Tus nqi ntawm kev sib cais cuam tshuam los ntawm dej kub thiab HPMC concentration.
Organic kuab tshuaj:
Txawm hais tias HPMC yog feem ntau suav tias yog dej-soluble, qee cov qib yuav yog ib nrab solubs hauv qee cov ethanol lossis methanol. Txawm li cas los xij, kev siv cov kuab tshuaj organic yuav cuam tshuam rau kev tiv thaiv ib puag ncig thiab kev nyab xeeb ntawm cov txheej txheem.
HPMC cov qauv sib txawv:
1. Cov dej txias dispersion:
Maj mam ntxiv hpmc mus rau cov dej txias thaum storming tas li.
Cia cov tshuaj kho kom sib xyaw rau ob peb teev lossis hmo ntuj.
Yog tias ua tiav kev sib cais yuav tsum muaj, nce qhov kub.
2. Dissolve nyob rau hauv dej kub:
Dissolve HPMC hauv dej kub thaum stirring tas li.
Tswj qhov kub kom tsis txhob muaj gel tsim.
Cia cov tshuaj txias kom tau txais qhov tseeb, tuab ib txwm.
3. Kev sib xyaw nrog lwm cov polymers:
Sib tov HPMC nrog lwm cov dej-soluble polymers tuaj yeem txhim kho nws cov khoom siv solubility.
Txoj kev no muaj ntau nyob rau hauv kev npaj tshuaj.
4. Siv cov surfactants:
Ntxiv surfactants tuaj yeem txhim kho lub ntub dej thiab kev sib cais ntawm HPMC.
Kev saib xyuas yuav tsum tau coj los ua kom tau raws li qhov kev thov.
5. Tshuaj PH ZER:
Kho cov pH nyob hauv ib qho kev haum yuav ua tau zoo rau kev sib cais ntawm HPMC.
Siv cov kev daws teeb meem yuav siv tau los tswj kav phcai xav tau.
Kev Txiav Txim Siab:
Cov Khoom Siv Tiv Thaiv Tus Kheej (PPE):
Hnav cov khoom tiv thaiv tus kheej tsim nyog, suav nrog hnab looj tes thiab cov phuam qhwv caj dab, thaum tuav HPMC thiab cov kuab tshuaj.
Qhov cua:
Ua kom muaj thaj chaw ua haujlwm tau zoo muaj ventilated los txo kev nruj me ntsis fumes.
Kev Xeem Sib Sau:
Kev ntsuas kev sib raug zoo nrog lwm cov khoom xyaw kom tsis txhob muaj kev sib cuam tshuam zoo.
Cuam tshuam rau ib puag ncig:
Xav txog qhov cuam tshuam ib puag ncig ntawm koj cov kuab huab thiab pov tseg.
Dissolving hydroxypropyyl methylulose involes nkag siab txog nws cov khoom, xaiv cov kuab tshuaj uas tsim nyog, thiab siv ib txoj kev tsim nyog. Yam xws li qhov kub thiab txias, Ph thiab qib polymer ua si ib lub luag haujlwm tseem ceeb hauv kev ua tiav kev pom zoo tshaj plaws. Ua tib zoo saib txog kev nyab xeeb thiab cov teeb meem ib puag ncig yog qhov tseem ceeb thoob plaws tag nrho cov txheej txheem. Los ntawm kev ua raws li cov lus qhia no, ib qho tuaj yeem ploj zuj zus HPMC rau ntau cov ntawv thov hauv cov tshuaj, khoom noj, thiab kev lag luam.
Lub Sijhawm Post: Feb-19-2025