Cov khoom xyaw qhuav yog cov hmoov av ua los ntawm xis mas, xuab zeb, hmoov nplej thiab lwm yam khoom xyaw los ntawm kev sib txawv. Thaum siv, nws tsuas yog xav tau do los ntawm kev ntxiv cov dej. Qhuav-xyaw cug muaj qhov zoo ntawm kev siv yooj yim, ruaj khov zoo thiab lub sijhawm txuag, yog li nws tau siv dav siv hauv kev tsim kho. Txhawm rau txhim kho kev ua haujlwm ua haujlwm, kev tsim kho thiab tawg ntawm cov tshuaj khib qhuav, muaj qee yam tshuaj ntxiv yog xav tau. Ntawm lawv, HPMC (HydroxyPropyyl methylcellulose) yog ib qho tseem ceeb hloov cov khoom siv thiab feem ntau yog ntxiv rau cov tshuaj khib qhuav qhuav.
1. Txhim kho txoj kev tsim kho ntawm cug
HPMC tuaj yeem txhim kho kev tsim kho cov kev tsim kho ntawm cov tshuaj nplaum qhuav qhuav. Kev tsim kho cov kev ua tau zoo suav nrog kev ua haujlwm, cov nplaum thiab cov tshuaj khib nyiab ntawm cug, cuam tshuam ncaj qha cuam tshuam rau kev ua haujlwm zoo thiab ua haujlwm zoo. HPMC muaj cov nyhuv thickening, uas tuaj yeem ua rau viscosity ntawm cug, ua kom nws tsim yooj yim rau kev siv. Tshwj xeeb tshaj yog kev tsim kho loj, cov nplaum ntawm cug ua kom zoo dua qub rau phab ntsa lossis hauv av, thiab kev sib tshuaj ntawm cov ntws ntau dhau lossis zawv zawg dhau.
2. Txuas lub sijhawm qhib
Lub sijhawm qhib yog hais txog lub sijhawm ntawm kev ua tiav ntawm cult sib xyaw ua tiav ntawm kev siv. Kev qhib lub sijhawm qhib tuaj yeem ua kom cov txheej txheem kev tsim kho. Qhov sib ntxiv ntawm HPMC pab kom txuas ntxiv lub sijhawm qhib ntawm cug. Nws tuaj yeem ua kom qeeb txoj kev hydration ntawm cov cement, ua rau nws nyuaj rau lub sijhawm ua haujlwm zoo vim tias muaj cov dej lwg me me ntawm kev hloov. Nws yog qhov tshwj xeeb tshaj yog kev tsim kho loj lossis ua haujlwm ntev.
3. Txhim kho kev tawg
Qhuav-mixel yuav tawg thaum lub sij hawm tawv, tshwj xeeb tshaj yog thaum ib puag ncig sab nraud kub hloov tshiab. HPMC tuaj yeem txhim kho lub cev cug thiab nce nws cov platform thiab ua kom muaj kev sib xyaw ua ke thaum muaj kev sib xyaw thiab tawg ntawm cov tshuaj khib. Qhov no muaj qhov cuam tshuam zoo rau lub sijhawm ntev ruaj khov thiab cov tsos ntawm lub tsev.
4. Ua kom cov dej ua kom huv
HPMC muaj cov dej zoo khaws cia. Tom qab ntxiv hpmc mus rau lub tshuaj khib, nws tuaj yeem txo cov dej evaporation thiab tswj kom noo noo hauv lub tshuaj khib. Qhov no tsis yog pab kom cov Maas cov tshuaj tiv thaiv ntawm cov tshuaj khib, tab sis kuj tseem ua kom lub zog thiab ntom ntawm lub cug. Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig kub thiab qhuav, dej rov qab yog qhov tseem ceeb hauv kev tiv thaiv lub cug ntawm ziab thiab tawg thaum ntxov thiab tawv tawv tsis tiav.
5. Txhim khu cov impermeabability ntawm cug
HPMC tuaj yeem txhim kho qhov tsis raug ntawm cug, ua kom cov cement muab tshuaj pleev ib ce, thiab txo cov kev nkag mus, roj lossis lwm yam tshuaj. Los ntawm kev txhim kho microstructure ntawm lub cug cug, ua kom haum rau kev tsim kho cov dej num nrog cov kev txwv tsis pub muaj dej thiab dej noo.
6. Txhim kho cov nplaum ntawm cug
HPMC tuaj yeem ua kom muaj txiaj ntsig zoo ntxiv cov nplaum ntawm cov tshuaj khib thiab lub substrate. Tom qab ntxiv HPMC rau cov cug tov qhuav, cov nplaum ntawm cov nplaum ntawm cov nplaum, cov vuas, cov vuas luaj, cov vuas uas siv tau ntev ntev thiab ntseeg tau.
7. Txhim kho kev tawm tsam ntab thiab tawm tsam cov khoom uas npleem
Hauv qee cov ntawv thov tshwj xeeb (xws li nteg cov vuas lossis marble, thiab lwm yam) thiab los tiv thaiv cov khoom ntawm cug yog qhov tseem ceeb. HPMC tuaj yeem txhim kho cov tshuaj khib nyiab ntab dej cug, ua kom nws tsis muaj kab cug rau hauv cov txheej txheem tilitive thiab ruaj khov ntawm cov ntaub ntawv zoo nkauj.
8. Txo cov nqi
Txawm hais tias HPMC yog ib qho ntxiv, nws muaj cov nyhuv tseem ceeb ntawm kev txhim kho cov kev ua tau zoo ntawm cug. Vim tias nws tuaj yeem txhim kho kev ua tshuaj cug, tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem kev tsim kho kom txuas ntxiv lub neej pabcuam thiab txo thaum kawg txo tus nqi tsim kho tag nrho. Rau ib qho xwm txheej, HPMC tuaj yeem txo qis kev vam khom rau lwm cov ntaub ntawv ib pab pawg thiab pab cawm cov ntaub ntawv raw.
9. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
HPMC, raws li cov khoom siv tau los ntawm cov nroj tsuag ntuj cog cov fibers, muaj kev ua tau zoo ib puag ncig. Siv HPMC hauv cov tshuaj khib qhuav-xyaw tsis tuaj yeem txhim kho cov kev ua tshuaj cug, uas haum rau kev tiv thaiv sab hauv tsev thiab cov tuam tsev nrog kev tiv thaiv sab hauv tsev. Piv nrog rau lwm cov tshuaj sib xyaw ua tshuaj sib xyaw, HPMC muaj kev tiv thaiv ib puag ncig ib puag ncig thiab biocompatibility, uas ua tau raws li kev xav tau ntawm cov vaj ntsuab ib puag ncig hauv cov tsev niaj hnub no.
Kev siv HPMC hauv cov tshuaj xyaw qhuav xwb tsuas yog ua kom muaj ntau yam khoom ntawm cov khoom siv ntawm kev ua haujlwm zoo thaum txhim kho kev ua haujlwm zoo. Yog li, HPMC tau dhau los ua ib qho ntawm kev tsis tseem ceeb thiab cov tshuaj ntxiv tseem ceeb hauv colle tov. Raws li kev tsim kho kev tsim kho txuas ntxiv kom nws cov kev tsim ua rau cov khoom ua tau zoo, daim ntawv thov kev pab ntawm HPMC yuav muaj ntau yam ntxiv, nqa kom yooj yim dua thiab kev nyab xeeb rau kev tsim kho.
Lub Sijhawm Post: Feb-19-2025