Ntxiv rau HydroxyPropyf methylcellulose (HPMC) rau tshuaj khib tuaj yeem txhim kho nws cov khov kho. Qhov hloov kho no yog cov khoom siv ntxiv hauv tsev, tsuas yog siv los txhim kho cov khoom cug, suav nrog cov nplaim hluav taws, adhesion thiab cov txheej txheem.
Cov Khoom Yooj Yim ntawm HPMC
HPMC yog cov dej-soluble cellulose derivative nrog cov khoom siv hluav taws xob zoo, thickening thiab dej khaws cia. Tom qab ntxiv HPMC rau tshuaj khib, nws tuaj yeem ua kom zoo ua rau cov viscosity ntawm cug, yog li kev txhim kho cov dej evaporation tus nqi, yog li kev txhim kho cov qos tsis kam ntawm cug.
Mechanism ntawm kev txhim kho Frost Kuj
Kev ua kom cov dej ua kom tiav: Cov dej siab khaws cia ntawm HPMC tuaj yeem txo cov dej evapc tuaj yeem txo cov dej huv huv thiab ua kom lub tshuaj khib ua kom tawv. Qhov no pab cov tshuaj lom neeg ntawm cov cement, txhim kho lub zog ntawm lub tshuaj khib, thiab txhim kho cov ntshiab ua kom tsis kam.
Microstructure Eptimization: Lub microscopic tus qauv tsim los ntawm HPMC hauv cov tshuaj khib tau zoo thiab txhim kho cov dej thiab kev loj hlob ntawm cov muaju. Qhov no microstructure tuaj yeem ua kom cov tshuaj khib ruaj khov thaum khov thiab yaj, txo cov ntim hloov pauv thiab tawg tshwm sim los ntawm qhov kub hloov.
Txo Porosity: HPMC tuaj yeem txo qhov porosity ntawm kev tshuaj khib thiab txo cov hauv kev nkag mus. Qhov no yog qhov tseem ceeb rau te ua kom tsis kam, vim tias muaj cov nplaim hluav taws xob tsawg tsawg ntawm cov kev pheej hmoo ntawm cov kev pheej hmoo ntawm kev nthuav dav thiab kev puas tsuaj los ntawm khov.
Ua kom nruj: Qhov ntxiv ntawm HPMC tuaj yeem txhim kho cov tawv ntawm cov tshuaj khib thiab txhim kho nws lub peev xwm los tiv thaiv sab nraud rog thiab ntsuas kub. Qhov kev siv hluav taws xob no ua rau lub tshuaj khib kom zoo dua rau kev ntxhov siab thaum lub sijhawm khov-thaw mus ncig thiab txo qhov tau ua kev puas tsuaj.
Kev sim thiab tshawb fawb tau
Ntau cov kev tshawb fawb tau pom tias ntxiv tus nqi tsim nyog ntawm HPMC txhawm rau tshuaj khib tau txhim kho nws cov khov kho. Piv txwv li, kev sim ua qhia tau tias ntawm HPMC ntxiv muaj kev ua kom khov ntawm ntau dua 30% piv rau lub tshuaj khib tsis muaj HPMC. Ib qho ntxiv, txoj kev tshawb fawb kuj pom tias ntau yam ntxiv ntawm HPMC muaj cov kev sib xyaw ntawm cov tshuaj khib, yog li hauv cov ntawv thov tiag tiag, nws yuav tsum tau hloov kho raws li cov xwm txheej tshwj xeeb.
Kev ceev faj hauv cov ntawv thov siv
Kev tswj ntau tshuaj tswj: txawm hais tias HPMC tuaj yeem txhim kho lub zog ua haujlwm cug, nws cov tshuaj yuav tsum tau tswj hwm. Kev ntxiv ntau dhau yuav ua rau lub zog ntawm cult txug mus rau qis dua, uas yuav cuam tshuam nws cov kev ua tau zoo tag nrho. Yog li ntawd, nws feem ntau pom zoo kom ntsuas raws li cov kev sib piv thiab ib puag ncig ib puag ncig.
Kev sib xyaw nrog lwm cov tshuaj ntxiv: thaum npaj tshuaj vepterives, yog tias lwm hom tshuaj ntsuab, yog tias muaj lwm hom kev sib ntxiv tau siv tib lub sijhawm, nws yog ib qho tsim nyog kom them sai sai rau qhov sib txawv ntawm lawv kom tsis txhob muaj kev cuam tshuam ntawm lawv.
Cawv ntawm kev tsim kho ib puag ncig: ib puag ncig cov xwm txheej thaum lub sij hawm tsim kho (xws li qhov ntsuas kub, av noo, thiab lwm yam) yuav cuam tshuam rau HPMC. Thaum tsim nyob rau hauv ib puag ncig kub tsawg, tsim nyog kho qhov sib piv thiab txoj kev tsim qauv los xyuas kom meej qhov kev ua tau zoo tshaj plaws ntawm lub tshuaj khib.
Daim ntawv thov ntawm HPMC hauv tshuaj khib yuav ua tau zoo ua rau nws cov tshuab ua kom zoo dua, feem ntau microstructure, txo cov porosity thiab kev txhim kho kev nruj. Txhawm rau kom ntseeg tau tias cov qos tsis ua tiav ntawm cov kab tshuaj khib ua tiav cov kev cia siab, nws raug pom zoo kom ua tiav cov ntawv thov tiag tiag kom ua tiav qhov zoo tshaj plaws engineering kev ua haujlwm.
Lub sijhawm Post: Feb-15-2025