Dab tsi yog qhov tsim nyog viscosity ntawm hydroxypropyl methylcellulose (HPMC)?
Putty hmoov feem ntau yog 100,000 yuan, thiab qhov yuav tsum tau rau mortar yog siab dua, thiab 150,000 yuan yuav tsum tau siv yooj yim. Ntxiv mus, qhov tseem ceeb tshaj plaws ua haujlwm ntawm HPMC yog dej tuav, ua raws li thickening. Hauv cov hmoov putty, tsuav yog cov dej tuav tau zoo thiab cov viscosity tsawg (70,000-80,000), kuj tseem tuaj yeem ua tau. Tau kawg, qhov siab dua qhov viscosity, qhov zoo dua qhov txheeb ze dej tuav. Thaum lub viscosity siab tshaj 100,000, lub viscosity yuav cuam tshuam cov dej tuav. Tsis ntau ntxiv lawm.
Yuav ua li cas yog cov txheej txheem dissolution ntawm hydroxypropyl methylcellulose (HPMC)?
(1) Whiteness: Txawm hais tias Baidu tsis tuaj yeem txiav txim siab seb HPMC puas siv tau yooj yim, thiab yog tias cov tshuaj ntxuav hniav dawb ntxiv thaum lub sijhawm tsim khoom, nws qhov zoo yuav raug cuam tshuam. Txawm li cas los xij, feem ntau ntawm cov khoom zoo muaj cov xim zoo nkauj.
(2) Fineness: Qhov zoo ntawm HPMC feem ntau muaj 80 mesh thiab 100 mesh, thiab 120 mesh tsawg dua. Feem ntau HPMC tsim nyob rau hauv Hebei yog 80 mesh. Qhov zoo tshaj qhov fineness, feem ntau hais, qhov zoo dua.
(3) Lub teeb xa hluav taws xob: muab hydroxypropyl methylcellulose (HPMC) tso rau hauv dej los tsim cov pob tshab colloid, thiab saib nws lub teeb xa tawm. Qhov loj dua lub teeb transmittance, qhov zoo dua, qhia tias muaj tsawg insolubles nyob rau hauv nws. . Lub permeability ntawm ntsug reactors feem ntau zoo, thiab cov kab rov tav reactors yog phem, tab sis nws tsis txhais hais tias qhov zoo ntawm ntsug reactors zoo dua li cov kab rov tav reactors, thiab cov khoom zoo yog txiav txim los ntawm ntau yam. (4) Lub ntiajteb txawj nqus tshwj xeeb: qhov loj dua qhov tshwj xeeb lub ntiajteb txawj nqus, qhov hnyav dua qhov zoo dua. Qhov tshwj xeeb yog loj, feem ntau vim hais tias cov ntsiab lus ntawm hydroxypropyl pawg hauv nws yog siab, thiab cov ntsiab lus ntawm hydroxypropyl pawg yog siab, cov dej tuav tau zoo dua.
Lub luag haujlwm tseem ceeb ntawm kev thov HPMC hauv cov hmoov nplej yog dab tsi, thiab nws puas tshwm sim tshuaj?
Hauv cov hmoov putty, HPMC plays peb lub luag hauj lwm ntawm thickening, dej tuav thiab kev tsim kho.
Thickening: Cellulose tuaj yeem ua kom tuab kom tshem tawm thiab ua kom cov tshuaj sib txawv nce thiab nqis, thiab tiv thaiv sagging.
Kev tuav dej: ua kom cov hmoov putty qhuav maj mam, thiab pab cov hmoov tshauv calcium kom hnov mob hauv qab dej.
Kev tsim kho: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov putty muaj kev tsim kho zoo. HPMC tsis koom nrog cov tshuaj tiv thaiv, tab sis tsuas yog ua lub luag haujlwm pabcuam. Ntxiv dej rau cov hmoov putty thiab muab tso rau ntawm phab ntsa yog cov tshuaj tiv thaiv, vim hais tias cov tshuaj tshiab yog tsim. Yog tias koj tshem cov hmoov putty rau ntawm phab ntsa ntawm phab ntsa, zom rau hauv cov hmoov, thiab siv nws dua, nws yuav tsis ua haujlwm vim tias cov tshuaj tshiab (calcium carbonate) tau tsim. ) thiab.
Cov khoom tseem ceeb ntawm cov hmoov tshauv calcium hmoov yog: sib tov ntawm Ca (OH) 2, CaO thiab ib qho me me ntawm CaCO3, CaO + H2O = Ca (OH) 2 -Ca (OH) 2 + CO2 = CaCO3↓ + H2O tshauv calcium. Hauv dej thiab huab cua Raws li kev ua ntawm CO2, calcium carbonate yog tsim, thaum HPMC tsuas yog khaws cov dej, pab cov tshuaj tiv thaiv zoo dua ntawm cov hmoov tshauv calcium, thiab tsis koom nrog cov tshuaj tiv thaiv nws tus kheej.
Kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC, dab tsi yuav tsum tau them sai sai rau hauv kev siv tswv yim?
Lub viscosity ntawm HPMC yog inversely proportional rau kub, uas yog, lub viscosity nce raws li qhov kub thiab txias. Lub viscosity ntawm ib yam khoom peb feem ntau xa mus rau qhov kev xeem ntawm nws 2% aqueous tov ntawm qhov kub ntawm 20 degrees Celsius.
Hauv kev siv tswv yim, nws yuav tsum raug sau tseg tias nyob rau hauv cov cheeb tsam uas muaj qhov sib txawv ntawm qhov kub thiab txias ntawm lub caij ntuj sov thiab lub caij ntuj no, nws raug nquahu kom siv cov viscosity tsawg hauv lub caij ntuj no, uas yog qhov zoo rau kev tsim kho. Txwv tsis pub, thaum kub qis, viscosity ntawm cellulose yuav nce, thiab txhais tes xav tias yuav hnyav thaum khawb.
Nruab nrab viscosity: 75000-100000 feem ntau yog siv rau putty
Yog vim li cas: tuav dej zoo
High viscosity: 150000-200000 yog tsuas yog siv rau polystyrene particle rwb thaiv tsev mortar roj hmab hmoov thiab vitrified microbead rwb thaiv tsev mortar.
Yog vim li cas: siab viscosity, mortar tsis yooj yim rau poob, sagging, uas txhim kho kev tsim kho.
Post lub sij hawm: May-18-2023