Methylcellulose (MC) yog ib qho derivative tau los ntawm cellulose los ntawm kev kho methylation thiab muaj lub cev thiab tshuaj lom neeg tshwj xeeb. Raws li cov khoom siv dav siv, nws ua lub luag haujlwm tseem ceeb hauv ntau yam kev lag luam, suav nrog cov khoom siv hauv tsev, khoom noj, tshuaj, tshuaj pleev ib ce thiab txheej, thiab lwm yam. Nws zoo heev thickening, dej tuav, bonding, film-forming, emulsifying thiab stabilizing zog ua methylcellulose. ib qho tseem ceeb muaj nyob rau hauv optimizing thiab txhim khu kev qha formulations.
1. Thickening nyhuv
Lub thickening zog ntawm methylcellulose ua rau nws ib tug indispensable additive nyob rau hauv kev tsim kho thiab coatings industries. Hauv kev tsim kho kev lag luam, tshwj xeeb tshaj yog nyob rau hauv cov cement-based mortar thiab gypsum khoom, methylcellulose tuaj yeem ua rau muaj kev sib luag thiab viscosity ntawm cov mis, yog li txhim kho cov khoom ua haujlwm ntawm cov khoom. Rau cov txheej txheem thiab cov xim, qhov sib ntxiv ntawm methylcellulose tuaj yeem tiv thaiv cov kua dej kom tsis txhob muaj dej ntau thiab txhim kho cov adhesion thiab uniformity ntawm txheej.
Lub mechanism ntawm thickening yog tsuas yog los ntawm kev tsim ib tug network qauv nyob rau hauv cov tshuaj los ntawm methylcellulose. Cov saw hlau molecular ntawm methylcellulose cuam tshuam los ntawm hydrogen bonds hauv dej los tsim ib qho kev daws teeb meem nrog qee qhov viscosity. Cov qauv network no tuaj yeem ntes thiab kho cov dej molecules, yog li ua kom cov viscosity thiab stability ntawm cov kua system.
2. Kev tuav dej
Hauv kev tsim cov ntaub ntawv xws li cement mortars thiab gypsum slurries, cov dej tuav cov khoom ntawm methylcellulose yog qhov tseem ceeb. Cov khoom siv hauv tsev yuav tsum muaj qhov tsim nyog ntawm cov dej noo los koom nrog cov tshuaj tiv thaiv thaum lub sijhawm kho. Kev poob dej ntxov ntxov yuav ua rau cov khoom kho tsis txaus, txo qis zog, lossis tawg ntawm qhov chaw. Methylcellulose ua ib zaj duab xis nyias ntawm cov khoom siv los tiv thaiv cov evaporation ntau dhau ntawm cov dej thiab xyuas kom meej tias cov cement, plaster thiab lwm yam ntaub ntawv muaj dej txaus thaum lub sijhawm kho, yog li txhim kho lawv lub zog thiab kav ntev.
Cov dej tuav cov nyhuv no tshwj xeeb yog qhov tseem ceeb hauv qhov chaw qhuav lossis qhov kub thiab txias, tso cai rau methylcellulose los ua kom zoo dua qhov kev ua tau zoo ntawm cov qauv tsim nyob rau hauv ib puag ncig huab cua.
3. Kev sib khi thiab txhim kho cov khoom siv zog
Cov khoom sib txuas ntawm methylcellulose kuj zoo heev hauv kev tsim khoom. Piv txwv li, nyob rau hauv cov pobzeb nplaum thiab lwm hom kev sib txuas cov neeg ua haujlwm, methylcellulose tuaj yeem txhim kho qhov adhesion ntawm formulation, tso cai rau cov khoom sib txuas ua kom zoo dua rau qhov chaw ua haujlwm. Qhov ntev molecular saw qauv ntawm methylcellulose tuaj yeem cuam tshuam nrog cov khoom siv matrix los txhim kho lub zog sib txuas, yog li txhim kho tag nrho cov qauv ntawm cov khoom.
Nyob rau hauv fiber-reinforced plastics (FRP), methylcellulose tuaj yeem txhim kho lub zog thiab tawv ntawm cov ntaub ntawv sib xyaw los ntawm nws cov qauv fibrous, muab cov khoom muaj zog tensile thiab hnav tsis kam, yog li txhim kho nws cov kav ntev hauv kev lag luam. poj niam deev.
4. Zaj duab xis tsim
Methylcellulose muaj peev xwm ua tau zoo zaj duab xis hauv kev daws teeb meem, thiab cov cuab yeej no tau siv dav hauv ntau qhov chaw lag luam. Hauv kev lag luam coatings thiab xim, methylcellulose tuaj yeem tsim cov yeeb yaj kiab tiv thaiv uas ua rau cov dej tsis kam thiab tshuaj tiv thaiv ntawm cov txheej txheem.
Hauv kev lag luam khoom noj khoom haus, methylcellulose kuj feem ntau siv rau hauv txheej txheej los yog zaj duab xis-tsim txheej txheem, tshwj xeeb tshaj yog nyob rau hauv cov ntim tshiab ntawm cov txiv hmab txiv ntoo, zaub thiab lwm yam khoom noj. Los ntawm kev tsim cov yeeb yaj kiab nyias, methylcellulose ncua kev ya raws thiab tiv thaiv cov zaub mov los ntawm ib puag ncig sab nraud.
5. Stabilization thiab emulsification
Methylcellulose tuaj yeem tsim cov tshuaj viscosity siab thaum yaj hauv dej, uas muaj cov nyhuv stabilizing thiab emulsifying. Cov cuab yeej no tseem ceeb tshwj xeeb hauv kev lag luam xws li coatings, xim, tshuaj pleev ib ce thiab tshuaj npaj. Nyob rau hauv cov xim thiab cov xim, methylcellulose tuaj yeem ua kom ruaj khov ntawm cov xim dispersion, tiv thaiv kev daws teeb meem, thiab txhim kho cov gloss thiab uniformity ntawm txheej; nyob rau hauv cov tshuaj pleev ib ce, methylcellulose ua hauj lwm raws li ib tug emulsifier kom stabilize cov dej-roj sib xyaw system thiab tiv thaiv Stratification tshwm sim.
Hauv kev npaj tshuaj, methylcellulose feem ntau yog siv los ua kom tuab thiab ruaj khov cov kua hauv qhov ncauj thiab ua cov khoom siv rau cov tshuaj. Nws viscosity thiab film-forming zog yuav pab tau cov tshuaj tso tawm maj mam, ncua lub sij hawm ntawm cov tshuaj nyhuv, thiab txhim kho cov bioavailability ntawm cov tshuaj.
6. Thermal gelling zog
Ib qho tseem ceeb ntawm lub cev ntawm methylcellulose yog nws tus cwj pwm thermal gelling, uas nws hloov mus rau hauv gel thaum rhuab. Cov yam ntxwv no ua rau nws irreplaceable nyob rau hauv ib co tshwj xeeb muaj formulations. Piv txwv li, hauv kev lag luam zaub mov, methylcellulose yog siv los ua cov khoom noj muaj roj tsawg. Cov gel tsim tom qab cua sov muaj qhov saj zoo ib yam li cov rog, cia cov khoom noj muaj roj tsawg kom muaj kev saj zoo thiab kev ntxhib los mos. Hauv kev tsim kho kev lag luam, cov cuab yeej thermal gelling no txhim kho cov kav ntev thiab kev ruaj ntseg ntawm cov ntaub ntawv tsim kho hauv qhov chaw kub kub.
7. Biocompatibility thiab ib puag ncig tus phooj ywg
Methylcellulose, raws li ib tug natural derived compound, muaj zoo biocompatibility thiab ib puag ncig tus phooj ywg. Qhov no ua rau nws nrov zuj zus hauv cov qauv kev lag luam niaj hnub no, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam uas muaj kev tiv thaiv ib puag ncig siab dua, xws li cov tsev ntsuab, ecological coatings thiab cov khoom ntim degradable. Methylcellulose tuaj yeem degraded ib txwm muaj, txo qhov hnyav ntawm ib puag ncig thiab ua raws li kev lag luam ntawm kev tsim kho kom ruaj khov.
8. Txhim kho kev ua haujlwm zoo
Hauv kev tsim khoom, methylcellulose tuaj yeem txhim kho kev ua haujlwm zoo. Piv txwv li, hauv cov khoom siv hauv tsev, methylcellulose tuaj yeem txhim kho cov dej ntws thiab dej tuav cov ntaub ntawv, yog li txhim kho qhov yooj yim thiab kev ua haujlwm ntawm kev tsim kho; hauv cov tshuaj pleev ib ce thiab tshuaj npaj, methylcellulose tuaj yeem txhim kho kev ruaj ntseg ntawm cov qauv thiab txo cov nag lossis daus. thiab delamination, yog li ncua lub txee lub neej ntawm cov khoom. Cov khoom no tso cai rau methylcellulose los txhim kho kev ua tau zoo ntawm kev tsim khoom thaum ua kom zoo rau cov qauv tsim.
Raws li ib tug multifunctional additive, methylcellulose yog siv nyob rau hauv ntau industries xws li kev tsim kho, khoom noj khoom haus, tshuaj, tshuaj pleev ib ce, txheej, thiab lwm yam vim nws ntau yam khoom xws li thickening, dej tuav, tsevneeg, film-forming, stabilization, emulsification thiab thermal gelling. plays lub luag haujlwm tseem ceeb hauv thaj chaw. Nws tuaj yeem tsis tsuas yog txhim kho lub cev lub zog ntawm cov qauv tsim, tab sis kuj tseem txhim kho kev tsim khoom thiab ua tau raws li cov kev xav tau sib txawv. Nyob rau tib lub sijhawm, biocompatibility thiab ib puag ncig tus phooj ywg ntawm methylcellulose kuj ua rau nws yog cov khoom siv zoo tshaj plaws uas ua tau raws li cov kev xav tau ntawm kev txhim kho kom ruaj khov. Los ntawm rationally thov methylcellulose nyob rau hauv industrial formulations, nws tsis tau tsuas yog txhim kho cov khoom zoo, tab sis kuj txhawb kev nce qib thiab kev loj hlob ntawm industrial technology.
Post lub sij hawm: Sep-13-2024