Thickening nyhuv ntawm cellulose ether

Neeg muaj neeg ua haujlwmyog ib pab pawg ntawm ntau yam ntau cov polymers dav hauv kev lag luam rau lawv cov khoom siv thickenies. Pib nrog kev qhia rau cellulose cov neeg muaj kev pab thiab lawv cov teeb meem, daim ntawv no delving li cas cov kev sib cuam tshuam nrog dej molecules ua rau viscosity li. Ntau hom cellulose tau sib tham, suav nrog methyl cellulose, hydroxyethyl cellulose, txhua tus muaj tshwj xeeb cov yam ntxwv thickening. Cov kev siv ntawm cellulose cov neeg hais ua neeg muaj kev lag luam xws li kev tsim kho, cov chaw muag tshuaj, cov tshuaj pleev ib ce, ua rau lawv lub luag haujlwm tseem ceeb hauv kev tsim cov khoom lag luam thiab tsim khoom. Thaum kawg, qhov tseem ceeb ntawm cellulose cellulose cov kev pab cuam tam sim no tau hais tawm, nrog rau yav tom ntej cov kev cia siab thiab kev nce qib hauv cellulose tshuab.

Cov neeg muaj kev ntseeg hauv cellulose sawv cev rau chav kawm ntawm cov polymers tau muab los ntawm cellulose, ogiquitous biopolymer muaj ntau yam pom hauv cov phab ntsa cell. Nrog rau cov khoom siv dag zog, cov neeg ua haujlwm hauv cellulose tau siv dav hauv ntau yam kev lag luam, feem ntau rau lawv cov nyhuv tuab. Lub peev xwm ntawm cellulose neeg muaj kev nce vencosity thiab txhim kho rheological cov zog ua rau lawv tsis tseem ceeb hauv ntau cov ntaub ntawv siv cov khoom siv rau cov chaw tsim khoom.

1. Siv cov khoom siv ntawm cellulose muaj neeg ua haujlwm

Ua ntej delving rau hauv lub thickening nyhuv ntawm cov cellulos cov neeg muaj kev pab cuam cellulos, nws yog qhov tseem ceeb kom nkag siab lawv cov teeb meem. Cov neeg hais daws cellulose yog synthesized los ntawm cellulose ntawm cellulose, feem ntau koom nrog etherification tiv thaiv. Cov pab pawg hydroxyl (-h) tam sim no nyob rau hauv lub cellulose cov hloov pauv hloov cov pab pawg ether (-or), nyob qhov twg sawv cev ntau yam chaw. Qhov hloov chaw no ua rau Alolic cov qauv thiab cov yam ntxwv ntawm cellulose, muab cov cim sib txawv rau cov neeg muaj kev hais ua cellulose.

Cov txheej txheem kev hloov kho hauv cellulose muaj cov neeg hais ua phem cuam tshuam lawv solubility, rheological tus cwj pwm, thiab thickening cov khoom. Cov degree ntawm kev hloov pauv (DS), uas yog hais txog qhov nruab nrab ntawm cov pab pawg hydroxyl ib pawg ntawm kev txiav txim siab ntawm cov khoom ntawm cellulose muaj cov neeg muaj kev hais ua. Cov DS ntau dua feem ntau correlates nrog nce solubility thiab thickening efficiency.

2.Mhanghis ntawm cov nyhuv thickening

Cov nyhuv tuab tau nthuav tawm los ntawm cellulose muaj kev hais kom muaj kev cuam tshuam los ntawm lawv kev sib cuam tshuam nrog dej lwg me me. Thaum dispersed nyob rau hauv dej, cov neeg hais lus cellulos uas muaj kev cuam tshuam hydration, nyob rau hauv dej lwg hydrogen atoms nrog lub ols oxygen atcts thiab hydroxyl pawg ntawm cov pob tes polymer. Cov txheej txheem kev lag luam cov roj ntsha ua rau o ntawm cellulose ovealles thiab kev tsim ntawm cov qauv sib txawv hauv lub aqueous nruab nrab.

Cov entanglement ntawm hydrated cellulose ether cov saw hlau thiab tsim ntawm hydrogen khi ntawm polymer molecules pab txhawb rau viscosity li. Ib qho ntxiv, cov electrostatic repulsion ntawm nether cov pab pawg neeg ntxiv cov ntaub ntawv txuas ntxiv los ntawm kev sib txuas ntawm polymer thiab txhawb nqa kev faib tawm hauv cov kuab tshuaj.

Kev coj tsis ncaj ntawm cellulose ether cov kev daws teeb meem yog cuam tshuam los ntawm cov kev xav zoo xws li lub zog polymer, qib siab hloov chaw, thiab qhov kub thiab txias. Ntawm cov kev ua kom muaj zog qis, cellulose ether cov kev daws teeb meem, lawv tau ua kom muaj kev cuam tshuam nrog cov neeg ua haujlwm tshiab, lawv muaj kev cuam tshuam nrog cov kev cuam tshuam nrog cov haujlwm tshiab.

3.types ntawm cellulose neeg muaj kev pab
Cellulose muaj kev hais ua ke ua rau muaj ntau yam ntawm derivpass ntau yam ntawm cov tuab tuab tuab cov khoom haum rau ntau yam kev siv. Qee hom kev siv ntawm cov kws ua kom muaj kev ua haujlwm cellulose muaj xws li:

Methyl Cellulose (MC): Methyl Cellulose tau muab los ntawm Ethegation ntawm cellulose nrog methyl pawg. Nws yog soluble nyob rau hauv dej txias thiab cov khoom pob tshab, cov ntsiab lus dav. MC Cov khoom pov thawj kev ua kom zoo thiab siv tau ua ib qho tuab siv cov ntaub ua kom zoo, cov tshuaj pleev xim, thiab khoom noj.

Hydroxyethyl cellulose (HEC): Hydroxyethyl cellulose yog synthesi

ZED los ntawm kev qhia txog cov pab pawg hydroxyethyl mus rau lub cellulose caj qaum. Nws yog soluble hauv ob qho tib si txias thiab dej kub thiab ua yeeb yam pseudopastic cwj pwm. HEC tau dav siv hauv cov tshuaj yeeb yaj kiab, cov khoom siv saib xyuas tus kheej, thiab raws li cov tuab tuab hauv cov xim looj.

HydroxyPropyl cellulose (HPC): HydroxyPropyl cellulose tau npaj los ntawm Ethetification ntawm cov pawg nrog hydroxyproprorropyl. Nws yog soluble nyob rau hauv ntau cov kuab tshuaj, suav nrog dej, cawv, thiab cov kuab tshuaj organic. HPC feem ntau ua haujlwm ua cov tuab, phau ntawv, thiab zaj duab xis-ua tus sawv cev ntawm cov tshuaj, tshuaj pleev ib ce, thiab pleev xim.

Carboxymethyl cellulose (CMC): Carboxymethyl cellulose yog tsim los ntawm Carboxymethylation ntawm cellulose nrog cellulose acid los yog nws cov ntsev ntsev. Nws yog soluble heev hauv dej thiab ua cov tshuaj tua tau nrog cov kev daws teeb meem zoo. CMC nrhiav cov kev siv dav dav hauv cov khoom noj khoom haus, cov chaw muag tshuaj, cov ntawv nyeem, thiab cov ntawv tsim khoom.

Cov cellulose muaj kev hais ua kom muaj cov khoom siv thicking, thiab sib xyaw nrog lwm cov khoom xyaw, ua rau lawv haum rau cov kev thov muaj ntau zuj zus thoob plaws kev lag luam.

4. Luam Ntawv Ntawm Cellulose Muaj Cov Neeg Muaj
Qhov ntau ntawm cov khoom siv ntawm cellulose muaj kev pab hais txog lawv qhov tsis tau muaj nyob hauv ntau cov ntawv thov. Qee cov ntawv thov tseem ceeb ntawm cov neeg hais ua cellulose muaj xws li:

Cov khoom siv tsim kho: Cov neeg muaj kev hais ua cellulose tau siv dav ntxiv raws li cov khoom sib xyaw xws li cug saws xws li kev tshuaj khib, khaws cia kom ua haujlwm, kom dej ua ke, thiab cov nplaum. Lawv ua li rhehology modifiers, tiv thaiv cais tawm thiab txhim kho kev ua tau zoo ntawm cov khoom siv tsim.

Kws Tshuaj Kho Mob: Cov kev siv hauv cellulose pom cov kev siv hauv chaw tshuaj uas muaj kev sib cav sib ceg, tshuaj ntsuab, raug tshem tawm, thiab ophthalmic daws teeb meem. Lawv txhim kho cov khoom ntws ntawm hmoov, pab txhawb ntsiav tshuaj compression, thiab tswj tso cov khoom xyaw nquag.

Cov Khoom Noj Khoom Noj: Cov neeg muaj kev pab cuam cellulose feem ntau yog ua haujlwm rau hauv ntau cov khoom noj khoom haus, suav nrog cov kua ntses, hnav khaub ncaws, khoom qab zib. Lawv txhim kho kev ntxhib los mos, viscosity, thiab lub qhov ncauj thaum txhim kho txee txee ruaj khov thiab tiv thaiv synergeses.

Cov tshuaj pleev ib ce thiab kev saib xyuas tus kheej: Cov neeg kho mob cellulose tau siv cov tshuaj pleev ib ce thiab cov tshuaj txhuam hniav, tshuaj txhuam hniav, tshuaj txhuam hniav, tshuaj txhuam hniav, emulsifiers, thiab zaj duab xis-ua cov neeg sawv cev. Lawv muab cov khoom lag luam uas xav tau kev ntshaw, txhim kho cov khoom ruaj khov, thiab muab txoj kev du, nplua nuj.

Xim thiab pleev xim:Neeg muaj neeg ua haujlwmUa raws li rheology modifiers nyob rau hauv cov xim tha xim, pleev xim, thiab cov nplaum, txhim kho viscosity tswj, sag referance, thiab zaj duab xis tsim. Lawv pab txhawb rau kev sib luag ntawm cov qauv, tiv thaiv xim xim, thiab txhim kho kev thov cov khoom.

Cov nyhuv thickening ntawm cellulose cov neeg muaj cai ua si lub luag haujlwm tseem ceeb hauv ntau cov txheej txheem kev muaj cov txheej txheem thiab cov khoom tsim. Lawv cov khoom sib txawv ntawm cov khoom xyaw, sib xyaw nrog lwm cov khoom xyaw, thiab biodegradity ua rau lawv nyiam cov kev xaiv rau cov tuam ntxhab thoob plaws ntau txoj haujlwm. Raws li kev lag luam txuas ntxiv ua ntej kev ua kom ruaj khov thiab cov kev daws teeb meem hauv eco-phooj ywg, qhov kev thov rau cellulose neeg muaj kev ntseeg yog cia siab ntxiv.