Carboxymethylcellulose (CMC) thiab cellulose yog ob qho tib si polysaccharides nrog cov khoom sib txawv thiab kev siv. Kev nkag siab txog lawv qhov sib txawv yuav tsum tshawb nrhiav lawv cov qauv, cov khoom, lub hauv paus, cov txheej txheem tsim khoom, thiab kev siv.
Cellulose:
1. Txhais thiab qauv:
Cellulose yog lub ntuj polysaccharide tsim los ntawm cov kab sib txuas ntawm β-D-glucose units txuas los ntawm β-1,4-glycosidic bonds.
Nws yog lub hauv paus ntsiab lus ntawm cov nroj tsuag cell phab ntsa, muab lub zog thiab rigidity.
2. Qhov chaw:
Cellulose muaj ntau nyob rau hauv cov xwm thiab yog feem ntau muab los ntawm cov nroj tsuag xws li ntoo, paj rwb thiab lwm yam ntaub ntawv fibrous.
3. Ntau lawm:
Kev tsim cov cellulose suav nrog kev rho tawm cellulose los ntawm cov nroj tsuag thiab tom qab ntawd ua nws los ntawm txoj kev xws li tshuaj pulping lossis kev sib tsoo tshuab kom tau txais cov fiber ntau.
4. Kev ua tau zoo:
Nyob rau hauv nws daim ntawv ntuj, cellulose yog insoluble nyob rau hauv dej thiab feem ntau organic solvents.
Nws muaj lub zog tensile siab, ua rau nws haum rau cov ntawv thov uas muaj zog thiab kav ntev yog qhov tseem ceeb.
Cellulose yog biodegradable thiab environmentally friendly.
5. Daim ntawv thov:
Cellulose muaj ntau yam kev siv, suav nrog kev tsim cov ntawv thiab pawg thawj coj saib, textiles, cellulose-based plastics, thiab raws li kev noj haus fiber ntau.
Carboxymethylcellulose (CMC):
1. Txhais thiab qauv:
Carboxymethylcellulose (CMC) yog ib tug derivative ntawm cellulose nyob rau hauv uas carboxymethyl pawg (-CH2-COOH) yog nkag mus rau hauv lub cellulose qaum.
2. Kev tsim khoom:
CMC feem ntau yog tsim los ntawm kev kho cellulose nrog chloroacetic acid thiab alkali, uas ua rau hloov cov hydroxyl pawg hauv cellulose nrog carboxymethyl pawg.
3. Solubility:
Tsis zoo li cellulose, CMC yog dej-soluble thiab tsim cov tshuaj colloidal los yog gel nyob ntawm qhov concentration.
4. Kev ua tau zoo:
CMC muaj ob qho tib si hydrophilic thiab hydrophobic zog, ua rau nws haum rau ntau yam kev siv hauv cov khoom noj, tshuaj thiab kev lag luam.
Nws muaj peev xwm ua zaj duab xis thiab tuaj yeem siv los ua cov thickener lossis stabilizer.
5. Daim ntawv thov:
CMC yog siv rau hauv kev lag luam khoom noj khoom haus ua cov thickener, stabilizer thiab emulsifier hauv cov khoom xws li ice cream thiab salad dressings.
Hauv kev lag luam tshuaj, CMC yog siv los ua cov ntawv khi hauv cov ntsiav tshuaj.
Nws yog siv nyob rau hauv lub sizing thiab finishing txheej txheem ntawm lub textile kev lag luam.
qhov txawv:
1. Solubility:
Cellulose yog insoluble hauv dej, thaum CMC yog soluble hauv dej. Qhov sib txawv ntawm solubility no ua rau CMC muaj ntau yam hauv ntau yam kev siv, tshwj xeeb tshaj yog nyob rau hauv kev lag luam uas nyiam cov dej-raws li formulations.
2. Cov txheej txheem ntau lawm:
Kev tsim cov cellulose suav nrog kev rho tawm thiab ua tiav los ntawm cov nroj tsuag, thaum CMC yog tsim los ntawm kev hloov tshuaj lom neeg uas muaj cellulose thiab carboxymethylation.
3. Qauv:
Cellulose muaj ib tug linear thiab unbranched qauv, thaum CMC muaj carboxymethyl pawg txuas mus rau cellulose qaum, imparting ib tug hloov qauv nrog txhim khu kev qha solubility.
4. Daim ntawv thov:
Cellulose feem ntau yog siv hauv kev lag luam xws li ntawv thiab textiles qhov twg nws lub zog thiab insolubility muab qhov zoo.
CMC, ntawm qhov tod tes, yog siv nyob rau hauv ntau yam kev lag luam, nrog rau cov khoom noj, tshuaj thiab tshuaj pleev ib ce, vim nws cov dej solubility thiab versatility.
5. Lub cev muaj zog:
Cellulose paub txog nws lub zog thiab rigidity, ua rau muaj kev ncaj ncees ntawm cov nroj tsuag.
CMC tau txais qee yam khoom ntawm cellulose tab sis kuj muaj lwm tus, xws li lub peev xwm los tsim cov gels thiab cov kev daws teeb meem, muab ntau yam kev siv.
Txawm hais tias cellulose thiab carboxymethyl cellulose muaj cov hauv paus chiv keeb, lawv cov qauv thiab cov khoom sib txawv tau coj mus rau kev siv sib txawv hauv kev lag luam sib txawv. Cellulose lub zog thiab insolubility tuaj yeem muaj txiaj ntsig zoo hauv qee qhov xwm txheej, thaum CMC cov dej solubility thiab hloov cov qauv ua rau nws muaj txiaj ntsig zoo hauv ntau yam khoom thiab cov qauv.
Post lub sij hawm: Dec-26-2023