Hydroxypropylmethylcellulose (HPMC) yog cov khoom siv polymer uas muaj ntau yam kev siv hauv ntau yam.Siv dav hauv tshuaj, khoom noj, tshuaj pleev ib ce, kev tsim kho thiab lwm yam lag luam.Lub purity ntawm HPMC yog ib qho tseem ceeb uas cuam tshuam rau nws cov kev ua tau zoo thiab kev siv.Hauv tsab xov xwm no, peb tham txog yam uas cuam tshuam rau kev huv ntawm HPMC.
1. Cov khoom siv raw
Lub purity ntawm HPMC feem ntau nyob ntawm purity ntawm raw cov ntaub ntawv siv nyob rau hauv nws ntau lawm.Cov khoom siv raw siv hauv HPMC ntau lawm suav nrog cellulose, methyl chloride, propylene oxide thiab dej.Yog tias muaj impurities nyob rau hauv cov ntaub ntawv raw, lawv yuav raug nqa mus rau HPMC thaum lub sij hawm tsim khoom, ua rau poob ntawm purity.
2. Cov txheej txheem ntau lawm
Cov txheej txheem tsim khoom ntawm HPMC suav nrog ntau cov kauj ruam, suav nrog cov tshuaj tiv thaiv ntawm cellulose nrog methyl chloride thiab propylene oxide, purification thiab ziab.Ib qho kev sib txawv ntawm cov txheej txheem zoo tuaj yeem ua rau impurities hauv cov khoom kawg, txo nws cov purity.
3. Solvents thiab catalysts
Thaum lub sij hawm tsim cov HPMC, cov kuab tshuaj thiab cov catalysts yog siv los pab txhawb cov tshuaj tiv thaiv ntawm cellulose, methyl chloride thiab propylene oxide.Yog tias cov kuab tshuaj thiab cov catalysts tsis yog siab purity, lawv yuav kis tau thiab txo qhov purity ntawm cov khoom kawg.
4. Kev khaws cia thiab kev thauj mus los
Kev khaws cia thiab kev thauj mus los kuj txiav txim siab qhov purity ntawm HPMC.HPMC yuav tsum tau muab cia rau hauv qhov chaw txias thiab qhuav kom tsis txhob muaj dej nqus thiab degradation.Ntxiv cov stabilizers tsim nyog thiab antioxidants thaum lub sij hawm cia thiab kev thauj mus los tuaj yeem tiv thaiv HPMC degradation thiab tswj nws cov purity.
5. Kev tswj kom zoo
Thaum kawg, kev tswj xyuas zoo yog qhov tseem ceeb hauv kev ua kom huv ntawm HPMC.HPMC cov tuam txhab lag luam yuav tsum siv cov kev tswj xyuas nruj nruj los saib xyuas cov khoom huv huv ntawm lawv cov khoom.Qhov no suav nrog kev sim cov purity ntawm raw cov ntaub ntawv, ua tsis tu ncua kev soj ntsuam zoo thaum lub sij hawm tsim khoom, thiab ntsuam xyuas qhov purity ntawm cov khoom kawg.
Hauv cov ntsiab lus, qhov purity ntawm HPMC cuam tshuam los ntawm ntau yam, suav nrog cov khoom siv raw purity, txheej txheem tsim khoom, cov kuab tshuaj thiab cov khoom siv hluav taws xob siv, khaws cia thiab kev thauj mus los, thiab kev tswj kom zoo.Txhawm rau kom paub tseeb tias qhov zoo tshaj plaws thiab purity ntawm HPMC, kev siv cov khoom zoo raw khoom, nruj ua raws li cov kev xav tau ntawm cov khoom siv, siv cov kuab tshuaj purity thiab catalysts, kev cia thiab thauj khoom kom raug, thiab kev tswj xyuas nruj yuav tsum tau ua. .Los ntawm kev ua li ntawd, cov tuam ntxhab tuaj yeem tsim cov HPMCs zoo uas ua tau raws li cov kev xav tau ntawm cov neeg siv khoom hauv ntau qhov kev lag luam.
Post lub sij hawm: Lub Xya hli ntuj-18-2023