Putty hmoov feem ntau yog siv rau kev tswj hwm thiab kho phab ntsa thaum lub sijhawm kev tsim kho. Txawm li cas los xij, ib txwm muaj cov hmoov uas muaj zaub mov muaj zog yuav txiav tawm thiab ua kom zoo nkauj thaum uas raug dej, cuam tshuam rau lub neej ua haujlwm ntawm lub tsev. HydroxyPropyyl methylulose (HPMC), raws li qhov tseem ceeb ntxiv, tuaj yeem txhim kho cov dej tsis kam ntawm cov hmoov putty.
1. Tshuaj lom neeg thiab cov haujlwm yooj yim ntawm HPMC
HydroxyPropyyl methylulose (HPMC) yog cov tsis muaj ionic cellulose ete nrog ntau yam kev ua kom tuab, ua yeeb yaj kiab, thiab ntub dej. Nws yog dav siv hauv cov ntaub ntawv hauv tsev, tshuaj, khoom noj thiab lwm daim teb. Pawg molecular ntawm HPMC muaj hydrophilic hydroxyl pawg (-H) thiab hydrophobic hydrocarbon pab pawg (-ch2-), muab nws cov dej solubility hydrocarbon thiab kev ruaj khov. Cov khoom no pab HPMC los tsim cov kev daws teeb meem ruaj khov hauv dej thiab tsim cov qauv siv ntom nti thaum lub zog kho lub cev, yog li txhim kho cov khoom siv lub cev ntawm cov khoom.
2. Mechanism txhawm rau txhim kho cov dej tsis kam
2.1. Thickening nyhuv
HPMC tuaj yeem ua kom cov viscosity ntawm putty hmoov slurry, tso cai rau slurry los ua tus me ntsis kev ncua hauv dej. Ntawm ib sab tes, qhov no thickening cov nyhuv no txhim kho kev tsim kho ntawm cov slurry thiab txo qhov tshwm sim ntawm delamination thiab los ntshav; Ntawm qhov tod tes, los ntawm kev tsim lub voscous slurry, HPMC txo qhov kev nkag ntawm cov dej lwg me me, yog li kev txhim kho kev ua tau zoo ntawm cov hmoov noj. Dej tsis kam tom qab kho.
2.2. Zaj duab xis-tsim cov khoom
Thaum lub sij hawm kho cov hmoov ntawm putty, hpmc yuav ua cov yeeb yaj kiab ntom nti ntawm Maas, dej thiab lwm yam khoom xyaw. Daim duab no muaj dej tsawg dua vapor kis thiab tuaj yeem thaiv qhov kev nkag mus ntawm cov dej noo. Zaj duab xis tsim los ntawm HPMC kuj tseem tuaj yeem txhim kho cov tshuab muaj zog thiab hnav tsis kam ntawm cov khoom siv tsis kam ntawm cov hmoov putty.
2.3. Txhim Kho Cov Khaub Ncaws Kuj Kuj
Los ntawm kev txhim kho cov match Txo qhov tshwm sim ntawm cov kab nrib pleb tseem yuav pab kom cov dej tsis kam ua kom muaj hmoov rau zaub, vim tias cov kab nrib pleb yuav dhau los ua cov kab tseem ceeb rau kev nkag mus.
2.4. Kev tswj cov dej tsis sib haum
HPMC tuaj yeem ncua ib qho kev ua dej num ntawm cov cement, tso cai rau cov hmoov uas muaj sia tseg kom muaj sijhawm ntev dua los kho tus kheej thiab zoo thaum lub sijhawm ua kom tawv nqaij tawv. Cov tshuaj tsw qab ntawm cov tshuaj tiv thaiv tau pab kom tsim cov microstructure, yog li txo qhov porosity ntawm cov hmoov uas muaj putty thiab txhim kho cov hmoov tsis muaj dej ntawm cov khoom siv.
3. Daim ntawv thov nyhuv ntawm HPMC hauv hmoov putty
3.1. Txhim kho kev tsim kho kev tsim kho
HPMC ua rau cov khoom siv hluav taws xob rheological ntawm putty slurry slurry, ua rau nws yooj yim dua rau cov neeg ua haujlwm kom ua scraping thiab smoothing ua haujlwm. Vim nws cov hmoov av ua kom zoo thiab dej khaws cia, PETTY hmoov tuaj yeem tswj hwm lub xeev uas haum thaum thov cov kab nrib pleb thiab txhim kho kev ua kom zoo.
3.2. Txhim kho cov cuab yeej siv ntawm cov khoom tiav
Putty hmoov ntxiv rau HPMC muaj cov kev kho tshuab hpmc muaj lub zog kho tshuab thiab cov nplaum tom qab kho tau, txo qhov tau los ntawm kev tawg thiab tev. Qhov no thiaj txhim kho qhov kev zoo nkauj tag nrho thiab lub zog ruaj khov ntawm lub tsev.
3.3. Txhim kho cov dej tsis kam ntawm txheej kawg
Kev sim qhia tau tias lub zog ntawm hmoov putty ntxiv rau HPMC txo qis dua tom qab tau soft hauv dej, thiab nws qhia tau zoo dua ntawm cov dej khov kho hydrolysis tsis kam thiab ruaj khov. Qhov no ua rau putty hmoov siv HPMC ntau tsim nyog rau kev tsim kho cov kev xav tau hauv cov chaw muaj puag ncig.
4. Daim ntawv thov kev ceev faj
Txawm hais tias HPMC muaj qhov cuam tshuam tseem ceeb ntawm kev txhim kho cov dej tsis kam ntawm cov hmoov putty, cov ntsiab lus hauv qab no yuav tsum tau sau tseg hauv cov ntawv thov kev siv:
4.1. Xaiv kev siv tshuaj
Qhov ntau npaum ntawm HPMC yuav tsum tau hloov kho raws li cov qauv thiab kev tsim kho cov khoom siv kom muaj. Kev siv ntau dhau yuav ua rau cov slurry kom muaj lub siab tawv, cuam tshuam kev tsim kho kev tsim kho; Kev siv tsis txaus yuav tsis tau ua tiav nws cov thickening thiab ua yeeb yaj kiab-ua yeeb yam.
4.2. Synergy nrog lwm cov khoom sib ntxiv
HPMC feem ntau yog siv rau lwm cov neeg ua kom muaj kev nyab xeeb, looj hmoov, cov yas thiab lwm yam kev sib ntxiv kom ua tiav zoo dua. Kev xaiv tsim nyog thiab txuam nrog cov tshuaj ntxiv no tuaj yeem ua kom zoo tshaj plaws ntawm kev ua tau zoo ntawm putty.
4.3. Tswj Ambient Kub thiab Vaum
Cov khoom siv dej ceev ceev ntawm HPMC yuav raug cuam tshuam thaum siv rau hauv qhov kub thiab txias ib puag ncig. Kev tsim kho yuav tsum tau nqa tawm hauv qab qhov ntsuas kub haum thiab cov av noo tej yam ntau li ntau tau, thiab saib xyuas yuav tsum tau them rau kev noo noo ntawm slurry.
HPMC zoo zoo txhim kho cov dej tsis kam ntawm cov hmoov putty los ntawm ntau cov kev hloov pauv, ua kom muaj kev sib tawg, tso cai rau nws nthuav tawm cov kev ruaj khov zoo thiab ua rau muaj kev ruaj ntseg zoo. Qhov no tsis tsuas yog txhim kho kev ua tau zoo thiab ua haujlwm tsim kho vaj tsev, tab sis kuj txuas lub neej pabcuam ntawm lub tsev. Hauv kev siv cov tswv yim, kev xaiv tsim nyog thiab siv HPMC thiab lwm tus ntxiv tuaj yeem ua kom zoo dua kev ua haujlwm ntawm cov hmoov uas muaj putty thiab ua tiav cov txiaj ntsig zoo dua.
Lub Sijhawm Post: Jun-26-2024