HydroxyPropyyl methylcellose (HPMC) yog cov khoom tsis-ionic ether derivative cov khoom lag luam vim cov khoom noj muaj txiaj ntsig vim nws cov txiaj ntsig zoo. Qhov no ntau yam ntxiv ua si lub luag haujlwm tseem ceeb hauv kev txhim kho cov kev ua tau zoo thiab ua haujlwm ntawm cov ntaub ntawv no. Ntawm no yog cov txiaj ntsig tseem ceeb ntawm kev siv HPMC hauv cov khoom noj kom haum, tawg rau ntau pawg:
1. Txhim Kho Cov Haujlwm Ua Haujlwm
HPMC tseem ceeb ua rau muaj kev ua haujlwm ntawm cov khoom noj khoom haus. Nws ua raws li dej rov qab tus neeg saib xyuas thiab rheology kho mob, uas pab ua kom tiav tus du thiab siv tau yooj yim. Cov cuab yeej no yog tshwj xeeb tshaj nyob rau hauv cov khoom xws li cov ntaub ntawv sib xyaw, cov neeg nplua nuj, thiab plasters.
Dej khaws cia: HPMC lub peev xwm los khaws cov dej kom ua kom cov dej sib xyaw ua haujlwm tau ntev dua. Qhov no yog qhov tseem ceeb hauv huab cua sov lossis ib puag ncig uas dej nrawm evaporation tuaj yeem ua rau kev ua haujlwm thaum ntxov thiab txo cov haujlwm ua haujlwm.
Rheology hloov kho: los ntawm kev kho cov viscosposity ntawm cov viscosposity ntawm kev sib xyaw thiab homogeneous sib tov, ua kom yooj yim tshaj tawm thiab thov kev sib xyaw ua ke.
2. Txhim Kho Adhesion
HPMC txhim kho cov khoom nplaum ntawm cov khoom noj khoom haus. Qhov no yog qhov tseem ceeb rau cov ntawv thov xws li cov nplaum thiab kho cov khoom lag luam tsis zoo, qhov twg muaj zog nplaum rau cov substrates yog qhov tseem ceeb.
Cov Khoom Ua Si Nto: Cov yeeb yaj kiab ua yeeb yaj kiab ntawm HPMC pab txhawb kom zoo dua kev sib raug zoo ntawm ntau lub substrates, suav nrog kev ua vaj tse, cib, thiab ceramic vuas luaj.
Shear lub zog: Txhim kho cov nplaum ua kom muaj txiaj ntsig ntau dua ntawm lub zog ntau dua, uas yog qhov tseem ceeb rau lub durability thiab ntev ntawm cov khoom siv.
3. Dej khaws cia thiab kho
Kev kho kom raug ntawm cov khoom siv rau cov txiv qaub yog qhov tseem ceeb rau kev ua tiav lub zog thiab kav ntev. HPMC cov dej khaws cia cov khoom ua si lub luag haujlwm tseem ceeb hauv lub hom phiaj no.
Hydration: los ntawm kev khaws dej nyob hauv cov xis mas sib xyaw, HPMC kom ua tiav cov dej ntawm cov Maas hais tawm, ua rau kev kho kom zoo thiab kev txhim kho kom muaj zog.
Kev tawg qeeb: Kev kho kom txaus txo qis kev pheej hmoo ntawm cov kab nrib pleb uas tshwm sim los ntawm kev ziab nrawm thiab shrinkage. HPMC pab hauv kev tswj cov ntsiab lus ya raws, yog li txo qhov tshwm sim ntawm shrinkage cracks.
4. Muaj feem thiab ruaj khov
HPMC pab txhawb rau qhov sib xws thiab muaj kev ruaj ntseg ntawm cov cement-raws li kev sib xyaw. Qhov no ua rau cov khoom siv tsis zoo thiab txhim kho kev ua tau zoo ntawm cov khoom kawg.
Sag Kuj: hauv cov ntawv thov ntsug li plasters thiab pobzeb cov nplaum, hpmc pab hauv kev tiv thaiv sagging thiab slumping hais tias cov khoom nyob hauv qhov chaw kom txog thaum nws teeb tsa.
Homogeneity: Nws pab nyob rau hauv lub chaw faib khoom noj khoom haus, tiv thaiv kev cais thiab muab cov sib xyaw ua ke uas ua tau hais tias ua tau kev hais tseg.
5. Txhim kho cov khoom siv neeg kho tshuab
Kev siv HPMC hauv cov khoom siv cov pajent-raws li kev txhim kho lawv cov khoom siv tshuab, suav nrog lub zog tensile, muaj zog ntawm lub zog, thiab tag nrho cov kev ua tau zoo.
Tensile thiab Flucural lub zog: Cov txheej txheem kev txuag kev ua haujlwm ua rau lub denser microstructure, uas txhim kho lub tensile thiab flexural lub zog ntawm cov khoom.
Qhov xwm txheej zoo dua: Kev kho kom zoo dua thiab txo kev tawg ua rau lub sijhawm ntev ntev ntawm cov khoom noj kom zoo nkauj, ua rau lawv tiv taus ntau yam thiab kev ntxhov siab.
6. Txhim kho cov tsos thiab ua tiav
HPMC txhim kho kev ua kom zoo nkauj ntawm cov khoom noj kom zoo nkauj los ntawm kev koom tes nrog smoother thiab ntau yam ua tiav tiav.
Cov nto: Cov kev ua haujlwm txhim kho thiab muaj txiaj ntsig ua kom pom cov ntawv thov smoother, ua rau muaj kev ua kom zoo nkauj ntxiv.
Kev txo tej yam: Los ntawm kev tiv thaiv cov teeb meem zoo li sagging, thiab tawg, hpmc pab hauv kev ua tiav qhov tsis muaj tseeb.
7. Kev ua tau zoo thiab tus nqi-ua hauj lwm zoo
Siv hpmc hauv cov khoom siv cov paj ntaub ntawv ua ke tuaj yeem ua rau cov txheej txheem kev thov ua tau zoo thiab cov peev txheej tau txais txiaj ntsig zoo.
Txo cov khoom siv pov tseg: txhim kho kev ua haujlwm thiab xwm yeem txo cov khoom siv uas muaj cov ntawv thov.
Ua haujlwm ua haujlwm: Qhov yooj yim daim ntawv thov thiab ncua sijhawm ua haujlwm tuaj yeem ua rau tus nqi nrawm thiab txo cov nqi ua haujlwm.
8. Sib xyaws nrog lwm cov kev sib ntxiv
HPMC tau tshaj li ntau yam ntawm lwm cov kev sib ntxiv uas siv hauv cov khoom tso cai
Synergistic cuam tshuam: thaum siv hauv kev sib xyaw nrog lwm cov kev sib ntxiv xws li superplasticizers, HPMC tuaj yeem txhim kho lawv cov hauj lwm zoo thiab ua rau muaj kev ua tau zoo dua.
9. Cov kev pab ib puag ncig
HPMC, muab tau los ntawm cov xov tooj ntawm ntuj, yog qhov ua kom ruaj khov thiab ib puag ncig ua phooj ywg ntxiv.
Biodegradability: Ua ib lub cellulose derivative, HPMC yog biodegradable thiab tsis ua rau ib puag ncig cov xwm txheej tseem ceeb.
Cov Khoom Siv Efficiency: nws lub peev xwm los txhim kho kev ua haujlwm thiab cov khoom siv rau cov neeg Maent-basing tuaj yeem ua rau kho kom ntev dua thiab siv tau kev siv ntau.
10. Cov ntawv thov tshwj xeeb
HPMC cov khoom muaj txiaj ntsig zoo ua rau nws haum rau cov ntawv thov tshwj xeeb hauv kev tsim kho kev lag luam.
Kev Ntsuas Tus Kheej: Hauv Kev Ntsuas Tus Kheej, HPMC ua kom muaj kev ywj siab thiab txawm tias saum npoo av, tseem ceeb rau cov ntawv thov tiav hauv pem teb.
Kho Mortars: rau kho neeg nplua nyiaj: kev kho cov neeg nplua nyiaj, HPMC muab cov ntawv nplaum tsim nyog thiab ua haujlwm kom ua tau zoo uas sib xyaw nrog cov qauv qub.
Qhov kev suav nrog hydroxypropyf methylcellose (HPMC) hauv cov txiaj ntsig kev tso cai, los ntawm kev txhim kho kev ua haujlwm ntau thiab ua kom zoo dua kev kho thiab cov khoom siv tshuab. Nws lub peev xwm los txhim kho qhov tsis sib xws, ruaj khov, thiab cov tsos ntawm cov khoom no ua rau nws muaj kev tsis txaus ntseeg hauv kev tsim kho. Ntxiv mus, HPMC cov txiaj ntsig ib puag ncig thiab kev sib xyaw nrog lwm cov nqi hluav taws xob ntxiv txhim kho nws cov nqi hluav taws xob ntxiv kom txhim kho kev tsim cov khoom siv ntawm cov khoom noj muaj txiaj ntsig zoo. Los ntawm kev siv zog ntawm HPMC, cov tuam txhab tsim khoom thiab cov tuam tsev tuaj yeem ua tiav cov txiaj ntsig zoo, ua rau muaj cov qauv siv ruaj khov, thiab ua kom zoo nkauj thiab ua kom zoo nkauj.
Lub Sijhawm Post: Lub Tsib Hlis-29-2024