Cov hau kev twg kom tshem tawm cellulose ether?

Daws cellulose neeg yuav ua tau yog ib qho tseem ceeb nyob hauv ntau yam kev lag luam xws li cov tshuaj, khoom noj, cov ntawv nyeem, thiab kev tsim kho.Neeg muaj neeg ua haujlwmtau siv dav vim lawv cov khoom xws li thickening, khi, zaj duab xis-sib sau, thiab ruaj khov. Txawm li cas los xij, lawv insolubility nyob rau ntau cov kuab tshuaj muaj peev xwm pig cov nyom. Ob peb txoj kev tau tsim kom yaj cellulose kev ua kom zoo.

Organic kuab tshuaj:

Cawv: Cov dej cawv tsawg dua xws li Ethanol, Methanol, thiab isopropanol tuaj yeem rho tawm cov cellulose muaj qee yam. Txawm li cas los xij, lawv yuav tsis haum rau txhua hom kev ua kom muaj kev hais ua ke ntawm cellulose thiab tuaj yeem xav kom nce kub.
Ether-cawv sib tov: sib xyaw ntawm diethil ether thiab ethanol lossis methanol feem ntau siv los yaj cellulose muaj kev muaj kev muaj kev ua kom paub. Cov kuab tshuaj no muab cov solubility zoo thiab siv tau hauv kev kuaj sim.
Ketones: Qee cov ketones zoo li acetone thiab methyl ketyl ketne (mek) tuaj yeem yaj qee yam ntawm cov neeg hais txog cellulose. Acetone, tshwj xeeb, tau siv dav vim nws tus nqi qis thiab ua tau zoo.
Esters: esters xws li Ethyl acetate thiab butyl acetate tuaj yeem rhuav tshem cov cellulose muaj kev pab tau zoo. Txawm li cas los xij, lawv yuav xav tau cua sov kom ua tiav kev sib cais ua tiav.

Aqueous Sedms:

Kev daws teeb meem Alkaline: Cov kev hais daws cellulose tuaj yeem yaj nyob rau hauv cov kev daws teeb meem alkaline xws li sodium hydroxide (naoh) lossis potassium hydroxide (koh). Cov kev daws teeb meem hydrolyze lub cellulose hais kom ua los ua alkali hlau ntsev, uas yog soluble.
Cov kev daws teeb meem Ammonia (NH3) kev daws teeb meem tseem tuaj yeem siv los ua kom cov neeg muaj kev pab tsis raug cai los ntawm kev ua cov khoom siv ammonium ntawm Ether.
Hydroxyalkyl uralre daws: hydroxyalkyl uralres urea, tuaj yeem tshem cov cellulops zoo, tshwj xeeb yog cov uas txo qis theem ntawm kev hloov pauv.

Ionic kua:

Ionic kua yog cov kua txiv organic uas yog cov kua dej uas muaj kua nyob ntawm cov kub tsawg, feem ntau qis dua 100 ° C. Qee cov kua dej ionic tau pom tias kom cov neeg muaj kev hais plaub yam tsis muaj txiaj ntsig yam tsis muaj kev mob hnyav. Lawv muab cov txiaj ntsig zoo xws li tsis muaj suab nrov, siab thermal stability, thiab rov ua dua.

Mixed Cov Tshuab:

Sib txuas sib txawv cov kuab tshuaj sib txawv tuaj yeem qee zaum txhim kho cov solubility ntawm cellulose muaj cov neeg muaj kev pab hais. Piv txwv li, cov dej sib xyaw nrog cov dej sib xyaw ua ke xws li dimethyl sulfoxide (dmo) lossis nMP) tuaj yeem txhim kho cov khoom sib txawv.
Lub Hansen Solubility Cov Ntsiab Lus Lub Ntsiab Lus Lub Ntsiab Lus Rau Cov Qauv Tsim Kho Cellulose los ntawm kev xaiv cov solubility ntawm cov kuab tshuaj thiab lawv cov kev sib cuam tshuam.

Kev Siv Lub Cev:

Cov kws kho tshuab shearing: high-shear sib xyaw los yog sonication tuaj yeem pab cuam tshuam hauv cellulose muaj cov neeg muaj kev pab cuam cellev hauv cov kuab tshuaj thiab kev txhim kho cov kev sib cais kinetics.
Kev tswj qhov kub thiab txias: kev nce siab kub tuaj yeem pab txhawb rau cov solubility ntawm cov kuab tshuaj, yuav tsum tsis txhob saib xyuas kom tsis txhob muaj kev tawm tsam ntawm cov polymer.

Tshuaj Kho Mob Tshuaj:

Muaj qee kis, kev hloov kho tshuaj ntawm cellulose muaj cai muaj peev xwm txhim kho lawv cov khoom siv solubility. Piv txwv li, qhia cov pab pawg hydrophobic lossis nce qib zuj zus tuaj yeem ua rau cov neeg tswj hwm cellulose ntau dua hauv cov kuab tshuaj hauv cov embic.

Micellar daws teeb meem:

Surfactants tuaj yeem sau mikelles hauv kev daws teeb meem, uas tuaj yeem soluburilizeNeeg muaj neeg ua haujlwmCov. Los ntawm kev kho surfactant concentration thiab kev daws teeb meem, nws muaj peev xwm kom yaj cellulose muaj kev pab tau zoo.
Hauv kev xaiv, kev xaiv ntawm txoj kev rau dissolving cellulose neeg muaj kev kawm nyob ntawm yam xws li solubule ether, ib puag ncig kev txiav txim siab, thiab cov ntawv thov npaj. Txhua txoj kev muaj qhov zoo thiab cov neeg tshawb fawb txuas ntxiv mus tshawb txog kev sib txawv ntawm cov kev pab cuam ntawm cellulose hauv ntau cov kuab tshuaj.