NtxivHydroxypropyl methylcellulose (HPMC)rau cov tshuaj ntxuav kua xav tau cov kauj ruam thiab cov txheej txheem tshwj xeeb kom ntseeg tau tias nws tuaj yeem yaj tag nrho thiab ua lub luag haujlwm hauv kev tuab, kev ruaj khov thiab kev txhim kho rheology.
1. Cov yam ntxwv tseem ceeb thiab kev ua haujlwm ntawm HPMC
Cov yam ntxwv ntawm HPMC
HPMC yog cov cellulose ether uas tsis yog ionic nrog kev yaj zoo, thickening thiab stability. Nws tuaj yeem tsim cov kua colloidal pob tshab hauv cov dej thiab muaj kev hloov pauv zoo rau kev hloov pauv ntawm qhov kub thiab pH.
Lub luag haujlwm hauv cov tshuaj ntxuav kua
Cov nyhuv tuab: Muab cov viscosity tsim nyog thiab txhim kho qhov kev xav ntawm cov tshuaj ntxuav.
Kev txhim kho kev ruaj khov: Tiv thaiv kom tsis txhob muaj cov tshuaj ntxuav sib xyaw lossis nag los.
Kev kho qhov rheology: Muab cov tshuaj ntxuav kua dej kom zoo thiab muaj peev xwm ncua.
Txhim kho qhov kev paub ntawm tus neeg siv: Txhim kho qhov ruaj khov thiab kev nplaum ntawm cov ua npuas ncauj.
2. Cov kauj ruam yooj yim rau kev ntxiv HPMC
Kev Npaj
Kev Xaiv: Xaiv cov qauv HPMC tsim nyog (xws li qib viscosity, qib hloov pauv, thiab lwm yam) raws li cov khoom xav tau. Cov qauv feem ntau suav nrog viscosity qis thiab viscosity siab HPMC rau ntau yam teebmeem tuab.
Kev Ntsuas Qhov Hnyav: Ntsuas qhov hnyav ntawm HPMC uas xav tau raws li cov qauv xav tau.
HPMC ua ntej dispersing
Kev xaiv xov xwm: Ua ntej faib HPMC nrog dej txias lossis lwm yam xov xwm uas tsis yog kuab tshuaj (xws li ethanol) kom tiv thaiv kev tsim cov pob thaum ntxiv ncaj qha.
Txoj kev ntxiv: Maj mam muab HPMC nchuav rau hauv dej txias uas tau do kom tsis txhob sib sau ua ke.
Cov txheej txheem nplawm: Txuas ntxiv nplawm li 10-15 feeb kom txog thaum muaj kev sib xyaw ua ke.
Cov kauj ruam ntawm kev yaj
Kev ua kom sov: Ua kom sov qhov dispersion mus rau 40-70 ℃ los txhawb kev o thiab yaj ntawm HPMC. Nws yuav tsum tau sau tseg tias qhov kub yaj ntawm HPMC ntawm cov qauv sib txawv yog txawv me ntsis.
Kev sib tov thiab yaj: Thaum ua kom sov, txuas ntxiv sib tov ntawm qhov ceev nruab nrab kom txog thaum HPMC yaj tag nrho los ua cov kua dej pob tshab lossis mis nyuj dawb sib xws.
Kev sib xyaw nrog cov kua ntxuav tais diav uas muaj cov kua dej
Kev kho cua txias: Txias qhovHPMCcov tshuaj rau qhov kub hauv chav kom tsis txhob muaj kev cuam tshuam ntawm qhov kub ntau dhau rau lwm cov khoom xyaw nquag ntawm cov tshuaj ntxuav.
Maj mam ntxiv: Maj mam ntxiv cov tshuaj HPMC rau hauv cov kua tshuaj ntxuav tes thaum do kom ntseeg tau tias muaj kev faib tawm sib xws.
Kev kho qhov viscosity: Kho qhov ntau ntawm HPMC kua kom ua tiav qhov viscosity xav tau.
3. Kev ceev faj
Tsis txhob sib sau ua ke
Thaum ntxiv HPMC, maj mam muab nws nchuav thiab do kom sib npaug, txwv tsis pub nws yooj yim los ua cov agglomerates, ua rau cov khoom yaj tsis tiav.
Kev tawg ua ntej yog ib kauj ruam tseem ceeb, thiab kev siv dej txias lossis lwm yam khoom siv uas tsis yog cov kuab tshuaj tuaj yeem tiv thaiv kev sib sau ua ke.
Txoj kev sib xyaw
Siv qhov sib xyaw ceev nruab nrab kom tsis txhob muaj npuas los ntawm kev sib xyaw ceev dhau, uas yuav cuam tshuam rau qhov zoo ntawm cov tshuaj ntxuav kua.
Yog tias ua tau, siv cov khoom siv nplawm siab kom txhim kho kev ua haujlwm ntawm kev sib kis.
Kev tswj kub
HPMC rhiab heev rau qhov kub thiab txias, thiab qhov kub siab dhau lossis qis dhau yuav ua rau yaj tsis zoo lossis poob kev ua haujlwm. Yog li ntawd, qhov kub yuav tsum tau tswj hwm nruj me ntsis thaum lub sijhawm yaj.
Kev sib raug zoo nrog lwm cov khoom xyaw
Tshawb xyuas qhov sib xws ntawm HPMC nrog lwm cov khoom xyaw hauv cov tshuaj ntxuav tes, tshwj xeeb tshaj yog qhov chaw ntsev ntau yuav cuam tshuam rau qhov tuab ntawm HPMC.
Rau cov tshuaj ntxuav uas muaj cov kua qaub muaj zog lossis cov alkali muaj zog, yuav tsum tau ua kom ruaj khov ntawm HPMC.
Lub sijhawm yaj
Nws yuav siv sijhawm ib ntus rau HPMC kom yaj tag, thiab nws yuav tsum tau do kom ua siab ntev kom tsis txhob muaj viscosity tsis ruaj khov vim tsis yaj tag.
4. Cov teeb meem thiab kev daws teeb meem uas feem ntau tshwm sim
Kev nyuaj siab ntawm kev yaj
Vim li cas: HPMC tej zaum yuav raug agglomerated lossis qhov kub yaj tsis tsim nyog.
Kev daws teeb meem: Ua kom zoo dua cov kauj ruam ua ntej kev tawg thiab tswj hwm cov txheej txheem cua sov thiab kev nplawm.
Kev faib cov tshuaj ntxuav los yog nag los ntawm cov tshuaj ntxuav
Vim li cas: Tsis txaus HPMC ntxiv lossis tsis tiav kev yaj.
Kev daws teeb meem: Ua kom ntau ntxiv ntawm HPMC kom raug thiab xyuas kom meej tias muaj kev yaj tag.
Siab viscosity
Vim li cas: HPMC ntau dhau ntxiv lossis sib xyaw tsis sib xws.
Kev daws teeb meem: Txo qhov ntxiv kom tsim nyog thiab ncua lub sijhawm do.
NtxivHPMCmus rau cov tshuaj ntxuav kua yog ib qho txheej txheem uas xav tau kev tswj hwm zoo. Txij li kev xaiv tus qauv HPMC tsim nyog mus rau kev ua kom zoo dua ntawm cov kauj ruam yaj thiab sib tov, txhua kauj ruam muaj qhov cuam tshuam tseem ceeb rau kev ua tau zoo ntawm cov khoom kawg. Los ntawm kev ua haujlwm kom raug, cov haujlwm thickening, stabilization thiab rheology kho ntawm HPMC tuaj yeem siv tau tag nrho, yog li txhim kho kev ua tau zoo thiab kev sib tw ua lag luam ntawm cov tshuaj ntxuav kua.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-10-2024