Hais txog cov txheej txheem kev tshaj lij uas tau txais los ntawm cov khoom siv tshuaj, nws yog ib qho tsim nyog yuav tsum tau nyiam thiab mloog ntawm txhua tus neeg ua haujlwm, vim tias qhov no yog tus yuam sij rau kev txiav txim siab zoo thiab kev ua tiav ntawm txhua qhov kev tsim kho. Yog tias txoj kev ua nws muaj feem cuam tshuam rau kev nyab xeeb ntawm cov khoom siv, piv txwv li, hydroxypropyl methylcellulose, uas yog tam sim no nrov heev nyob rau hauv ntau yam, cia peb saib nws ua ke hauv qab no.
Cov dej tuav ntawm methylcellulose nyob ntawm nws cov nyiaj ntxiv, viscosity, particle fineness thiab dissolution tus nqi. Feem ntau, yog tias qhov sib ntxiv yog qhov loj, qhov zoo me me, thiab cov viscosity loj, cov dej tuav tau siab. Ntawm lawv, qhov sib ntxiv muaj qhov cuam tshuam loj tshaj plaws ntawm cov dej tuav tus nqi, thiab qib ntawm viscosity tsis ncaj qha mus rau theem ntawm cov dej tuav tus nqi. Tus nqi dissolution feem ntau yog nyob ntawm qhov kev hloov kho saum npoo ntawm cellulose hais thiab particle fineness. Ntawm cov cellulose ethers saum toj no, methyl cellulose thiab hydroxypropyl methyl cellulose muaj cov dej tuav ntau dua.
Methylcellulose yog soluble hauv dej txias, thiab nws yuav nyuaj rau yaj hauv dej kub. Nws cov tshuaj aqueous yog ruaj khov nyob rau hauv thaj tsam ntawm pH = 3 ~ 12. Nws muaj kev sib raug zoo nrog cov hmoov txhuv nplej siab, cov pos hniav, thiab lwm yam thiab ntau surfactants. Thaum qhov kub nce mus txog qhov kub thiab txias, gelation tshwm sim.
Hais txog kev siv cov hydroxypropyl methylcellulose kom raug peb tau qhia rau koj saum toj no, nws yog ib qho tsim nyog yuav tau nyiam cov neeg siv khoom thiab cov neeg siv khoom, yog li txhawm rau ua kom muaj txiaj ntsig zoo ntawm cov khoom siv tshuaj no.
Post lub sij hawm: Mar-30-2023