HydroxyPropyyl Methylcellulose (HPMC)yog ib qho dej-soluble polymer compound dav siv nyob rau hauv cov ntaub ntawv tsim tsev. Nws siv hauv kev ua vaj tse tuaj yeem txhim kho cov khoom ntawm cov pob zeb ua thiab tshwj xeeb muaj qhov cuam tshuam zoo rau nws txoj kev kav ntev.
1. Kev txhim kho ntawm pob zeb ua cov Micrubtructure los ntawm HPMC
HPMC tuaj yeem txhim kho lub microstructure ntawm qhob los ntawm nws cov dej zoo heev thiab kev sib txuas lus. Thaum lub sij hawm tawv ntawm cov pob zeb ua, evaporation thiab poob dej yog lub ntsiab ua rau kev tsim ntawm sab hauv qhov tsis xws luag thiab micro-tawg. HPMC tuaj yeem tsim cov dej tsis sib xws-khaws cia ua zaj duab xis kom txo cov dej ntws, yog li txo qhov tawg sab hauv cov pob zeb ua thiab txhim kho cov kev sib txuas. Qhov no ntom micriving microstructure ncaj qha txhim kho cov impermabeability thiab khov rau ntawm cov pob zeb ua.
2. Txhim Kho Kev Mob
Yas shrinkage cracks thiab qhuav shrinkage cracks ua rau pob zeb ua rau cov txheej txheem tawv tawv yog cov teeb meem cuam tshuam rau lub zog. Lub peev txheej hauv dej siab ntawm HPMC qeeb cov dej poob ntawm cov pob zeb ua thiab txo qhov tshwm sim ntawm cov yas shrinkage tom ntej. Tsis tas li ntawd, nws lub roj teeb nyhiav rau ntawm cov cement muab tshuaj yuav txo cov kev ntxhov siab sab hauv thiab daws tau cov shrinkage qhuav. Cov khoom siv ua kom muaj cov rooj ua kom tsawg dua rau cov kev yaig ib puag ncig ntxiv los ntawm kev tawg thaum siv sijhawm ntev.
3. Txhim kho tiv thaiv kev tshuaj tua kab mob
Cov pob zeb ua yog feem ntau raug rau corrosive media xws li acids, alkalis lossis ntsev, thiab kev tawm tsam kev ua phem yuav ua rau nws cov kev ua tau zoo. HPMC tuaj yeem qeeb qeeb qhov kev nkag mus rau sab nraud ntawm kev kho corrosive sab nraud los ntawm kev txhim kho lub compactness thiab nto zoo ntawm pob zeb. Tsis tas li ntawd, cov qauv molecular ntawm HPMC muaj qee qhov kev ntsuas tshuaj lom neeg, uas tuaj yeem tiv thaiv cov tshuaj lom neeg ntawm cov xov xwm corrosive thiab qhob rau ib qho.
4. Txhim Kho Kom Khib-Thaw Lub Zog Ua Tau
Nyob rau hauv cov cheeb tsam txias, khov-thaw cycles yog ib qho ntawm cov laj thawj tseem ceeb ntawm kev cuam tshuam ntawm pob zeb ua vaj tse. Freeze-thaws nthuav dav ntawm noo noo nyob rau hauv cov pob zeb tuaj yeem ua rau tawg, yog li txo cov kev muaj zog. Los ntawm kev ua kom zoo rau cov dej khaws cia ua tau zoo thiab kev faib khoom lag luam, muaj kev faib cov dej dawb ntxiv los ntawm kev ua kom khov los ntawm khov-thaw mus.
5. Txhim kho kev tsim kho kev tsim kho thiab tsis ncaj ncees txhim kho kom ruaj khov
HPMC kuj muaj cov teebmeem zoo huv thiab lubricating thiab lubricating cuam tshuam hauv pob zeb sib xyaw ua ke, uas tuaj yeem txhim kho nws txoj haujlwm ua haujlwm. Kev tsim kho cov kev tsim kho zoo dua ua kom tau yooj yim kom ua tiav qhov zoo dua tom qab ua pob zeb ua kom tshwm sim xws li voids thiab cais. Cov nyhuv tsis ncaj ncees no ntxiv txhim kho lub sijhawm ntev ntev ntawm pob zeb.
Kev ceev faj hauv cov ntawv thov siv
Txawm hais tias HPMC muaj ntau yam zoo ntawm lub durability ntawm cov pob zeb ua, nws cov tshuaj yuav tsum tau tswj hwm kom tsim nyog. Ntau dhau hpmc yuav ua rau txo qis zog thaum ntxov ntawm cov pob zeb ua kom zoo lossis ntau dhau. Hauv kev siv cov kev thov, cov tshuaj thiab sib tov sib piv ntawm HPMC yuav tsum tau ua kom zoo dua los ntawm kev sim raws li kev xav tau kev lag luam engineering. Tsis tas li ntawd, kev ua tau zoo ntawm HPMC tseem yuav muaj kev cuam tshuam los ntawm ib puag ncig kub, av noo thiab lwm yam, yog li cov kev kho kom haum yuav tsum tau ua nyob rau hauv txawv tej yam.
Raws li cov qhob ua hauj lwm admixture,HPMCUa si lub luag haujlwm tseem ceeb hauv kev txhim kho lub durability ntawm pob zeb. Nws qhia tau cov kev tiv thaiv zoo heev hauv kev txhim kho microstructure kev, txhim kho tshuaj tua hluav taws xob, txhim kho tshuaj tua hluav taws thiab khov-thau tawm tsam. Txawm li cas los xij, nyob rau hauv kev siv tshuab, nws yuav tsum tau siv rationally raws li cov mob tshwj xeeb thiab xav tau kev ua si tag nrho rau nws qhov kev ua tau zoo. Nrog rau kev txhim kho kev txhim kho ntxiv ntawm kev siv tshuab, daim ntawv thov kev cia siab ntawm HPMC hauv cov pob zeb ua yuav dav.
Lub Sijhawm Post: Kaum-24-2024