Theem coj thiab Fibril tsim nyob rau hauv aqueous neeg ua haujlwm

Theem theem kev coj cwj pwm thiab fibril tsim hauv aqueousNeeg muaj neeg ua haujlwmYog cov qauv tshwm sim los ntawm cov qauv tshuaj ntawm lub cellulose muaj kev hais ua, lawv lub siab, thiab muaj lwm yam ntxiv. Cellulose muaj kev hais ua neeg muaj kev pab hais tias, xws li hydroxyprropylulose (hpmc) thiab carboxymethyl cellulose (CLC), yog paub rau lawv lub peev xwm los ua cov tshuaj pleev thiab nthuav tawm theem hloov pauv. Ntawm no yog ib qho dav dav:

Theem coj cwj pwm:

1. Sol-gel hloov:
   • Cov kev daws teeb meem aqueous ntawm cov neeg muaj kev hais ua ke feem ntau tau dhau ib sol-gel kev hloov ua txoj kev nce siab.
   • Ntawm cov khoom qis dua, cov kev daws teeb meem coj zoo li kua (sol), thaum nyob ntawm qhov ntau dua, nws tsim cov gel zoo li cov qauv.
2. Qhov tseem ceeb gelation concentration (CGC):
   • CGC yog kev pom zoo ntawm qhov kev hloov pauv ntawm kev daws teeb meem rau cov gel tshwm sim.
   • Qhov cuam tshuam rau CGC muaj cov qib ntawm lub cellulose ether, thiab muaj ntsev lossis lwm yam ntxiv.
3. Kev vam kub:
   • Gelation feem ntau yog kub-nyob, nrog qee cov kws kho cellulose ua kom muaj zog nce gelation ntawm cov kev kub siab dua.
   • Qhov kub no rhiab tau siv hauv cov ntawv thov nyiam tswj tshuaj thiab kev ua zaub mov noj.

Fibril tsim:

1. MICELLAR ABRAGREGARION:
   • Nyob rau tej yam tseem ceeb, cellulose muaj kev hais ua yuav ua mikelles lossis aggregates hauv kev daws teeb meem.
   • Kev sib sau ua ke yog tsav los ntawm hydrophobic sib txuas lus ntawm alkyl lossis hydroxyalkyl pab pawg thaum lub sij hawm ethermau.
2. Fibrillogenesis:
   • Kev hloov pauv ntawm soluble cov saw mus rau insoluble fibrils cuam tshuam nrog cov txheej txheem hu ua fibrillogenesis.
   • Fibrils yog tsim los ntawm kev sib txuam nrog kev sib txuam, hydrogen kev sib txuam, thiab lub cev ua haujlwm ntawm cov saw polymer.
3. Cawv ntawm Shear:
   • Daim ntawv thov ntawm shear rog, xws li nplawm lossis sib xyaw, tuaj yeem txhawb kev tsim kho hauv cellulose ether.
   • Shear-tituced qauv muaj feem cuam tshuam hauv cov txheej txheem kev siv thiab cov ntawv thov.
4. Ntxiv thiab crosslinking:
   • Qhov sib ntxiv ntawm salts lossis lwm yam kev sib ntxiv tuaj yeem cuam tshuam qhov tsim ntawm FIBRILLAR qauv.
   • Crosslinking tus neeg sawv cev yuav raug siv los tswj kev ua kom ruaj khov thiab ntxiv dag zog.

Cov Ntawv Thov:

1. Kev xa tawm tshuaj:
   • Cov gelation thiab fibril tsim cov yam ntxwv ntawm cellulose muaj kev hais ua kom tau siv siv hauv kev tso tshuaj yeeb tshuaj.
2. Kev Lag Luam Khoom Noj:
   • Cov neeg hais ua neeg hais ua haujlwm cellulose ua rau cov kev ntxhib los mos thiab muaj kev ruaj khov ntawm cov khoom noj khoom noj los ntawm kev taug thiab ua tuab.
3. Cov khoom lag luam ntawm tus kheej:
   • Gelation thiab fibril tsim txhim kho cov kev ua tau zoo ntawm cov khoom lag luam xws li tshuaj zawv plaub hau, tshuaj pleev, thiab cream.
4. Cov Khoom Siv Siv:
   • Gelation Proderties yog qhov tseem ceeb hauv kev txhim kho cov ntaub ntawv tsim kho xws li pobzeb cov nplaum thiab cov khoom lag luam.

To taub cov theem coj cwj pwm ntawm kev ua kom muaj kev hais ua cellulose yog qhov tseem ceeb rau kev txiav lawv cov khoom ntiag tug rau cov ntawv thov tshwj xeeb. Cov kws tshawb nrhiav thiab cov qauv ua haujlwm los ua kom zoo dua cov khoom rau kev txhim kho kev ua haujlwm hauv kev lag luam ntau yam.