Methylcellulose (MC) yog qhov ua tau los ntawm cellulose kev kho mob los ntawm kev kho me me thiab tshuaj siv lub cev siv tshuaj thiab quav tshuaj. Raws li qhov dav dav siv ntxiv, nws ua lub luag haujlwm tseem ceeb hauv ntau yam khoom siv tsim, nrog rau cov khoom siv tsim, ua yeeb yaj kiab ua yeeb yaj kiab, ua yeeb yam, ua yeeb yaj kiab thiab ruaj khov ua haujlwm ua methylcellulose Ib qho tseem ceeb hauv kev ua kom zoo thiab txhim kho kev lag luam tsim.
1. Thickening nyhuv
Cov khoom siv thickening ntawm methylcellulose ua rau nws tsis muaj qhov tseem ceeb hauv kev tsim kho thiab kev lag luam ntau. Hauv kev tsim kho kev tsim kho, tshwj xeeb tshaj yog hauv casent-raws cug thiab cov khoom siv meyylcellulose, me me txhim kho qhov ua haujlwm ntawm cov khoom siv. Rau cov txheej xim thiab cov xim pleev xim, ntxiv rau ntawm methylcellulose tuaj yeem tiv thaiv cov kua dej los thiab txhim kho cov nplaum thiab kev sib txuam ntawm cov txheej.
Lub tshuab ntawm thickening yog feem ntau yog los ntawm kev tsim ntawm lub network qauv hauv kev daws los ntawm methylcellulose. Cov pob zeb molecular ntawm methylcellulose sib cuam tshuam los ntawm hydrogen bonds hauv dej los ua kev daws teeb meem nrog qee yam viscosity. Cov qauv network no tuaj yeem ntes thiab txhim kho cov dej lwg dej, yog li nce cov viscosity thiab ruaj khov ntawm cov kua.
2. Dej ceev ceev
Hauv kev tsim kho cov khoom xws li Caas Mortars thiab Gypsum slurries, dej khaws cia ntawm methylcellose yog qhov tseem ceeb. Cov ntaub ntawv hauv tsev yuav tsum muaj qhov tsim nyog ntawm cov dej noo los koom rau hauv cov tshuaj tiv thaiv thaum lub sij hawm kho tus txheej txheem. Kev ntxuav cov dej ntxov ua rau kev kho tsis tau ntawm cov khoom, ib qho kev txo qis hauv lub zog, lossis cov kab nrib pleb ntawm qhov chaw. Methylcellulose cov lus qhia nyias nyias ntawm cov khoom kom tiv thaiv cov dej evasent, yog li kev txhim kho kom muaj zog, yog li txhim kho lawv lub zog thiab kav ntev.
Cov nyhuv dej no yog qhov tseem ceeb nyob rau hauv qhuav lossis qhov chaw methylcellulose los txhim kho kev ua haujlwm ntawm kev lag luam cov kev lag luam nyob rau hauv huab cua ib puag ncig.
3. Kev sib raug zoo thiab txhim kho cov khoom siv zog
Daim ntawv cog lus ntawm methylcellulose kuj yog tau zoo heev hauv kev lag luam ntau lawm. Piv txwv li, nyob rau hauv cov vais nplaum thiab lwm yam ntawm cov neeg sawv cev sib txawv, methylcellulose tuaj yeem txhim kho cov khoom nplaum ntawm cov khoom lag luam, tso cai rau cov khoom ua haujlwm zoo rau kev ua haujlwm. Cov khoom siv suab nrov ntev ntawm methylcellulose tuaj yeem cuam tshuam nrog cov khoom loj los txhim kho txoj kev sib txuas lus, yog li txhim kho cov txheej txheem txheej txheem txheej txheem tag nrho ntawm cov khoom.
Nyob rau hauv fiber ntau ntxiv plastics (frp), methylcellulose tuaj yeem txhim kho lub zog los ntawm nws cov khoom siv ntau dua los ntawm nws cov khoom siv ntau dua, yog li txhim kho nws cov ntawv thov kev lag luam. kev sib deev.
4. Zaj duab xis tsim
Methylcellulose muaj kev ua yeeb yaj kiab zoo-tsim muaj peev xwm hauv kev daws, thiab cov cuab yeej no tau siv dav hauv ntau daim teb. Nyob rau hauv cov txheej txheej thiab pleev xim kev lag luam, methylcellulose tuaj yeem tsim cov yeeb yaj kiab tiv thaiv uas tau nce cov dej tsis kam thiab cov tshuaj tiv thaiv ntawm cov txheej txheem.
Nyob rau hauv kev lag luam kev lag luam, metylcellulose kuj yog siv hauv txheej lossis zaj duab xis-ua cov txheej txheem, tshwj xeeb tshaj yog nyob rau hauv cov txiv ntoo tshiab, zaub thiab lwm yam khoom noj. Los ntawm kev sib sau ua yeeb yaj kiab nyias nyias, methylcellulose qeeb noo noo poob thiab tiv thaiv cov zaub mov ntawm ib puag ncig sab nraud.
5. Kev ruaj khov thiab emulsification
Methylcellulose tuaj yeem tsim cov dej hauv siab, uas muaj cov stabilizing thiab emulsifying cuam tshuam. Cov cuab yeej no yog qhov tshwj xeeb tshaj nyob rau hauv kev lag luam xws li cov txheej txheem, xim pleev xim, tshuaj pleev ib ce thiab tshuaj pleev muag khoom. Hauv cov xim pleev xim thiab pleev xim, methylcellulose tuaj yeem siv lub dispersion ntawm pigments, tiv thaiv kev sib cais, thiab txhim kho cov kab thiab cov khaub ncaws hnav zoo nkauj; Hauv kev ua kom zoo nkauj, methylcellulose pab ua tus emulsifier los tswj cov roj-roj sib xyaw thiab tiv thaiv kev sib xyaw ua ke.
Hauv kev npaj tshuaj tau npaj, methylcellulose feem ntau siv los ua kom tuab thiab ua kom lub qhov ncauj ua kua thiab ua cov cab kuj. Nws viscosity thiab cov yeeb yaj kiab-tsim cov khoom tuaj yeem pab cov tshuaj tau maj mam ntxiv, thiab txhim kho cov tshuaj tsis muaj txiaj ntsig ntawm cov tshuaj.
6. Thermal gelling cov zog
Lub cev tseem ceeb ntawm methylcellose yog nws qhov tshwj xeeb thermal gelling tus cwj pwm, uas nws hloov mus rau hauv ib gel thaum rhuab. Cov xeeb ceem no ua rau nws tsis yooj yim hauv qee cov kev lag luam tshwj xeeb. Piv txwv li, hauv kev lag luam khoom noj khoom haus, methylcellulose yog siv los ua cov khoom noj muaj roj tsawg. Cov gel tsim tom qab cua sov tau saj zoo ib yam li rog, pub zaub mov muaj roj tsawg los tswj cov khoom noj zoo thiab ua kom zoo. Hauv kev tsim kho kev tsim kho, cov cuab yeej thermal no txhim kho lub durability thiab kev ruaj ntseg ntawm cov khoom siv kev tsim kho hauv qhov chaw kub.
7. Biocompatibility thiab ib puag ncig cov phooj ywg
Methylcellulose, raws li ib txwm muaj kev sib xyaw ua ke, muaj cov phooj ywg zoo biocompatibility thiab ib puag ncig ua phooj ywg. Qhov no ua rau nws nrov nyob rau hauv cov kev lag luam niaj hnub, tshwj xeeb yog cov chaw muaj kev tiv thaiv ntau dua, xws li cov khoom siv ntsuab, cov khoom siv ntim hluav taws xob thiab cov khoom siv ntim khoom loj. Methylcellulose muaj peev xwm degraded ib txwm, txo txoj kev ua raws li ib puag ncig kev lag luam rau kev lag luam kev lag luam ntawm kev loj hlob ntawm kev ruaj khov.
8. Txhim kho kev ua haujlwm
Hauv kev lag luam ntau lawm, methylcellulose tuaj yeem txhim kho kev ua haujlwm. Piv txwv li, hauv cov ntaub ntawv tsim tsev, methylcellulose tuaj yeem txhim kho cov kua dej thiab cov dej ua kom yooj yim thiab txhim kho kev tsim kho; Hauv cov tshuaj pleev ib ce thiab tshuaj npaj, methylcellulose tuaj yeem txhim kho kev ruaj ntseg ntawm cov qauv thiab cov dej nag. Thiab Delamination, yog li txuas cov txee lub neej ntawm cov khoom. Cov khoom no pub rau methylcellulose kom txhim kho kev ua haujlwm ntau dua thaum ua kom tsim kho cov qauv.
Raws li kev ua haujlwm ntau ntxiv, methylcellulose siv ntau yam kev tsim kho, kev sib tw, ua yeeb yam, ua yeeb yaj kiab, ua yeeb yaj kiab, ua yeeb yam, ruaj khov thiab thermal gelling. Ua si lub luag haujlwm tseem ceeb hauv kev ua teb. Nws tsis tuaj yeem txhim kho cov khoom siv lub cev ntawm cov kev lag luam, tab sis tseem txhim kho ntau qhov ua tau zoo thiab sib ntsib muaj kev muaj kev lag luam ntau yam. Nyob rau tib lub sijhawm, lub biocompatibility thiab ib puag ncig cov phooj ywg muaj ntawm methylcellulose kuj ua rau nws cov ntaub ntawv zoo uas ua tau raws li cov cai ntawm kev txhim kho kom ruaj khov. Los ntawm rationalally thov methylcellulose hauv cov qauv kev lag luam, nws tsis tuaj yeem txhim kho cov khoom lag luam zoo, tab sis kuj txhawb kev nce qib thiab kev txhim kho kev lag luam.
Lub Sijhawm Post: Sep-13-2024