Tam sim nohydroxypropyl carboxymethyl cellulosekev muag khoom lag luam ntau thiab ntau dua, tus nqi tsis sib npaug, yuav ua li cas kom tshem tau qhov zoo ntawm hydroxypropyl methyl cellulose tau dhau los ua qhov teeb meem tseem ceeb! Yog li yuav ua li cas txiav txim qhov zoo ntawm hydroxypropyl methylcellulose? Thawj qhov yuav tsum tau saib yog qhov dawb ntawm hydroxypropyl cellulose; Txawm hais tias kev ua kom dawb tsis tuaj yeem paub meej tias HPMC puas tsim nyog rau daim ntawv thov, tab sis hauv cov txheej txheem ntawm kev ua haujlwm kuj tseem muaj qee cov tuam txhab tsis zoo yuav ntxiv cov tshuaj ntxuav hniav dawb, yuav ua rau nws zoo. Tab sis feem ntau hais lus, feem ntau ntawm cov cellulose ether zoo tshaj yog whiteness.
Thib ob, kom pom qhov zoo ntawm hydroxypropyl methyl cellulose: hydroxypropyl carboxymethyl cellulose particle loj ntawm 80-100 mesh, 120 mesh tsawg, hydroxyethyl cellulose HECHPMC txog 100 mesh. HPMC rau feem ntau 60-80 mesh, dav methyl cellulose softer, qhov zoo dua dispersion.
Kev daws ntawm cellulose ether clarity:HPMCmuab tso rau hauv dej los tsim cov pob tshab colloid tov, pom qhov kev daws teeb meem siab dua, qhov kev daws teeb meem siab dua, uas tsis yaj cov tshuaj lom neeg tsawg dua.
Thaum cov khoom yog rhuab, nws yog gelatinized los yog pooled thiab tom qab remelted. Nws yog hydrophobic thiab dej-soluble. Qhob yog qhov tseem ceeb sib txuas thiab demulsification raw khoom ntawm dej-resistant putty hmoov. Nws cov dej-resistant txoj cai yog raws li nram no: Nyob rau hauv tus txheej txheem ntawm ntxiv dej thiab nplawm lub redispersible latex hmoov thiab xis mas, cov latex hmoov yuav rov qab mus rau lub qub emulsion daim ntawv, thiab cov latex hais yog sib npaug zos rau hauv cov cement paste. Tom qab cov cement ntsib dej, cov tshuaj tiv thaiv hydration pib, thiab cov tshuaj Ca (OH) 2 mus txog saturation thiab precipitates crystals, thiab tib lub sij hawm, ettringite crystals thiab calcium silicate hydrate colloids yog generated. Latex particles yog tso rau ntawm gel thiab unhydrated cement hais. Nrog rau kev nce qib ntawm cov tshuaj tiv thaiv hydration, cov khoom hydration tau nce, thiab cov khoom siv latex tau maj mam sib sau ua ke hauv qhov tsis muaj cov khoom siv tsis zoo xws li cov cement, thiab tsim cov txheej txheem ze rau ntawm cov cement gel. Vim kev nce dej txo qis ntawm cov dej qhuav, cov lus sib xyaw ua ke ntawm cov yeeb yaj kiab, ua kom muaj kev sib xyaw ua ke ntawm cov yeeb yaj kiab ua ke, thiab kev sib xyaw ua ke cov hmoov nplej zom zaws nrog lwm cov hmoov ua ke.
Lub sij hawm xa tuaj: Plaub Hlis-28-2024