Hydroxypropyl methylcellulose yuav luag tsis yaj hauv ethanol thiab acetone kiag li. Cov kua dej ruaj khov heev ntawm chav tsev kub thiab tuaj yeem gel ntawm qhov kub siab. Feem ntau ntawm hydroxypropyl methylcellulose ntawm kev ua lag luam tam sim no yog dej txias (dej kub hauv chav tsev, dej kais) hom instant. Dej txias instant HPMC yuav yooj yim dua thiab muaj kev nyab xeeb dua rau kev siv. HPMC yuav tsum tau ntxiv ncaj qha rau hauv cov kua dej txias tom qab kaum txog cuaj caum feeb kom maj mam tuab. Yog tias nws yog tus qauv tshwj xeeb, nws yuav tsum tau do nrog dej kub kom tawg, thiab tom qab ntawd nchuav rau hauv dej txias kom yaj tom qab txias.
Thaum cov khoom HPMC raug ntxiv ncaj qha rau hauv dej, lawv yuav coagulate thiab tom qab ntawd yaj, tab sis qhov kev yaj no qeeb heev thiab nyuaj. Peb txoj kev yaj hauv qab no raug pom zoo, thiab cov neeg siv tuaj yeem xaiv txoj kev yooj yim tshaj plaws raws li qhov xwm txheej siv (feem ntau yog rau HPMC dej txias tam sim ntawd).
Txoj kev yaj thiab kev ceev faj ntawm HPMC
1. Txoj kev siv dej txias: Thaum xav tau ntxiv ncaj qha rau hauv cov kua dej kub ib txwm, nws yog qhov zoo tshaj plaws los siv hom dej txias dispersion. Tom qab ntxiv cov viscosity, qhov sib xws yuav maj mam nce mus rau qhov yuav tsum tau ua.
2. Txoj kev sib tov hmoov: HPMC hmoov thiab tib yam lossis ntau dua ntawm lwm cov khoom xyaw hmoov tau tawg tag nrho los ntawm kev sib tov qhuav, thiab tom qab ntxiv dej kom yaj, HPMC tuaj yeem yaj lub sijhawm no thiab yuav tsis sib sau ua ke. Qhov tseeb, tsis hais hom hydroxypropyl methylcellulose twg. Nws tuaj yeem sib xyaw qhuav ncaj qha rau hauv lwm cov ntaub ntawv.
3. Txoj kev ntub dej ntawm cov kuab tshuaj organic: HPMC tau muab faib ua ntej lossis ntub nrog cov kuab tshuaj organic, xws li ethanol, ethylene glycol lossis roj, thiab tom qab ntawd yaj rau hauv dej, thiab HPMC kuj tuaj yeem yaj tau yooj yim.
Thaum lub sijhawm yaj, yog tias muaj kev sib sau ua ke, nws yuav raug qhwv. Qhov no yog qhov tshwm sim ntawm kev sib xyaw tsis sib xws, yog li nws yog qhov tsim nyog los ua kom nrawm dua qhov kev sib xyaw. Yog tias muaj cov npuas hauv kev yaj, nws yog vim huab cua los ntawm kev sib xyaw tsis sib xws, thiab cov tshuaj tau tso cai rau sawv rau 2-12 teev (lub sijhawm tshwj xeeb nyob ntawm qhov sib xws ntawm cov tshuaj) lossis nqus tsev, nias thiab lwm txoj hauv kev kom tshem tawm, ntxiv cov tshuaj defoamer kom tsim nyog kuj tuaj yeem tshem tawm qhov xwm txheej no. Ntxiv cov tshuaj defoamer kom tsim nyog kuj tuaj yeem tshem tawm qhov xwm txheej no.
Vim tias hydroxypropyl methylcellulose siv rau hauv ntau yam lag luam, nws yog ib qho tseem ceeb heev uas yuav tsum paub txog txoj kev yaj hydroxypropyl methylcellulose rau nws txoj kev siv kom raug. Tsis tas li ntawd, cov neeg siv raug ceeb toom kom them sai sai rau kev tiv thaiv hnub, tiv thaiv nag thiab tiv thaiv dej noo thaum siv, zam kev kaj ncaj qha, thiab khaws cia rau hauv qhov chaw kaw thiab qhuav. Tsis txhob kov cov khoom siv hluav taws xob thiab tsis txhob tsim cov hmoov av ntau hauv qhov chaw kaw kom tiv thaiv kev phom sij tawg.
Lub sijhawm tshaj tawm: Lub Rau Hli-20-2023