Cov nyhuv ntawm hydroxypropyl methylcellulose ntawm cov khoom ntawm cov khoom ua vaj tse!

Hydroxypropyl methylcellulose (HPMC) muaj cov khoom thickening zoo heev thiab tuaj yeem siv los ua cov tshuaj tiv thaiv zoo rau cov pob zeb. Yav dhau los, cov khoom siv no yog cov khoom siv tshuaj uas tsis tshua muaj nyob hauv Suav teb, thiab nws cov nqi yog siab. Vim muaj ntau yam laj thawj, nws siv nyob rau hauv daim ntawv thov nyob rau hauv kuv lub teb chaws kev tsim kho kev lag luam, nyob rau hauv xyoo tas los no, nrog rau kev txhim kho txuas ntxiv ntawm sab nrauv phab ntsa rwb thaiv tsev tshuab, tsis muaj kev vam meej hauv cellulose ntau lawm technology, thiab cov yam ntxwv zoo heev ntawm HPMC tus thawj coj thiab kev txaus siab, HPMC tau siv dav hauv kev tsim kho kev lag luam.

Ib: Anti-dispersion test:

Dispersion kuj yog ib qho tseem ceeb kev ntsuas ntsuas los ntsuas qhov zoo ntawm kev sib cais. HPMC yog cov dej-soluble polymer compound, tseem hu ua dej-soluble resin lossis dej-soluble polymer. Nws tsub kom qhov sib tov teem sijhawm los ntawm kev ua kom cov viscosity nrog dej. Nws yog cov khoom siv dej-raws li polymer tuaj yeem yaj hauv dej los tsim cov kev daws teeb meem lossis kev sib cais. Kev sim qhia tau hais tias thaum tus nqi ntawm naphthalene-based high-efficiency dej reducers nce, qhov sib ntxiv ntawm cov dej reducers yuav txo cov dispersion tsis kam ntawm cov cement sib xyaw tshiab. Qhov no yog vim hais tias naphthalene-based high-efficiency dej reducer yog surfactant. Thaum cov dej reducer ntxiv rau hauv cov mortar, cov dej reducer yog taw qhia rau ntawm qhov chaw ntawm cov cement hais kom cov khoom ntawm cov cement particles muaj tib yam nqi. Qhov hluav taws xob repulsion no ua rau cov cement hais Cov qauv tsim flocculation yog dismantled, thiab cov dej uas muaj nyob rau hauv cov qauv raug tso tawm, uas yuav ua rau poob ntawm ib feem ntawm cov cement. Nyob rau tib lub sijhawm, nws pom tau hais tias nrog kev nce ntawm HPMC cov ntsiab lus, qhov kev tsis sib haum xeeb ntawm cov cement mortar tshiab tau zoo dua thiab zoo dua.

Ob: lub zog yam ntxwv ntawm pob zeb:

(1) Qhov sib ntxiv ntawm hydroxypropyl methylcellulose muaj qhov pom tseeb qeeb ntawm cov tshuaj khib nyiab sib tov. Nrog rau qhov nce ntawm tus nqi ntawm HPMC, lub sij hawm retarding ntawm lub mortar yog txuas mus ntxiv. Nyob rau hauv tib tus nqi ntawm HPMC, lub underwater molding Lub sij hawm ntawm lub mortar nyob rau hauv cov huab cua yog ntev tshaj li nyob rau hauv cov huab cua, uas muaj txiaj ntsig zoo rau kev siv dej-raws li pob zeb.

(2) Cov cement mortar tshiab sib xyaw nrog hydroxypropyl methylcellulose muaj cov khoom sib txuas zoo thiab yuav luag tsis muaj los ntshav.

(3) Tus nqi ntawm hydroxypropyl methylcellulose thiab cov dej xav tau ntawm mortar txo qis ua ntej thiab tom qab ntawd nce pom tseeb.

(4) Kev koom ua ke ntawm cov dej txo tus neeg sawv cev txhim kho qhov teeb meem ntawm cov dej xav tau ntau dua rau cov tshuaj khib nyiab, tab sis nws cov tshuaj yuav tsum tau tswj kom tsim nyog, txwv tsis pub cov dej hauv qab dej los tiv thaiv kev sib cais ntawm cov cement mortar tshiab yuav raug txo qee zaum.

(5) Ntxiv hydroxypropyl methylcellulose underwater non-dispersible qhob admixture, tswj qhov ntau npaum li cas yog qhov zoo rau lub zog. Qhov kev sim qhia tau hais tias qhov sib piv ntawm lub zog ntawm cov dej ua vaj tse thiab cov pob zeb ua vaj tse yog 84.8%, thiab cov txiaj ntsig tau muab piv rau qhov tseem ceeb.