Cellulose ethers yog ib pawg ntawm ntau yam thiab dav siv polymers muab los ntawm cellulose, ib tug natural polysaccharide pom nyob rau hauv cov nroj tsuag cell phab ntsa.Cov polymers no muaj cov yam ntxwv ntawm cov dej solubility, biodegradability, thiab cov khoom ua yeeb yaj kiab.Txawm hais tias cellulose ethers tsis yog siv ncaj qha rau hauv kev tsim cov yas yas, lawv ua lub luag haujlwm tseem ceeb hauv ntau yam lag luam xws li tshuaj, khoom noj, kev tsim kho thiab textiles.
Cellulose Ethers: Txheej txheem cej luam
Cellulose yog cov organic polymer ntau tshaj plaws nyob rau hauv lub ntiaj teb, thiab nws cov derivatives, hu ua cellulose ethers, yog synthesized los ntawm kev hloov tshuaj ntawm cellulose molecules.Feem ntau qhov chaw ntawm cellulose muaj xws li ntoo pulp, paj rwb, thiab lwm yam nroj tsuag fibers.
Lub ntsiab cellulose ethers muaj xws li:
Methylcellulose (MC): Ua los ntawm kev hloov cov hydroxyl pawg ntawm cellulose nrog methyl pawg, MC yog dav siv hauv kev lag luam khoom noj, tshuaj thiab kev tsim kho.Nws paub txog nws cov khoom tuav dej, ua rau nws yog ib qho zoo tagnrho additive nyob rau hauv ntau yam kev siv.
Hydroxypropylcellulose (HPC): Nyob rau hauv no derivative, pawg hydroxyl cellulose yog hloov los ntawm hydroxypropyl pawg.HPC feem ntau yog siv rau hauv cov tshuaj, tshuaj pleev ib ce, thiab cov khoom tu tus kheej vim nws cov yeeb yaj kiab tsim thiab thickening zog.
Hydroxyethyl cellulose (HEC): HEC yog tau los ntawm kev qhia cov pab pawg hydroxyethyl rau hauv cellulose.Nws yog siv los ua cov thickener, binder thiab stabilizer hauv kev lag luam xws li cov nplaum, xim thiab cov khoom siv tu tus kheej.
Carboxymethylcellulose (CMC): CMC yog tau los ntawm kev hloov ib feem ntawm hydroxyl pawg nrog carboxymethyl pawg.Nws yog dav siv nyob rau hauv kev lag luam khoom noj khoom haus raws li ib tug thickener thiab stabilizer thiab nyob rau hauv kev lag luam kws tshuaj rau nws cov khoom nplaum.
Kev siv ntawm cellulose ethers
1. Khoom noj khoom haus kev lag luam:
Cellulose ethers, tshwj xeeb tshaj yog CMC, tau siv dav hauv kev lag luam khoom noj khoom haus los txhim kho kev ntxhib los mos, ruaj khov thiab viscosity ntawm ntau yam khoom xws li ice cream, salad dressings thiab ci.
2. Tshuaj:
Methylcellulose thiab lwm yam cellulose ethers yog siv nyob rau hauv cov tshuaj formulations li binders, disintegrants, thiab film-forming agents nyob rau hauv cov ntsiav tshuaj manufacturing.
3. Kev tsim kho kev lag luam:
HEC thiab MC feem ntau yog siv hauv kev tsim kho kev lag luam los txhim kho kev ua haujlwm ntawm mortars, adhesives thiab coatings.Lawv pab txhim kho kev ua haujlwm thiab tuav dej.
4. Cov khoom siv tu tus kheej:
Hydroxypropyl cellulose thiab hydroxyethyl cellulose muaj nyob rau hauv ntau yam khoom siv tu tus kheej xws li tshuaj zawv plaub hau, tshuaj pleev thiab tshuaj pleev ib ce, muab viscosity thiab ruaj khov.
5. Textiles:
Cellulose ethers yog siv nyob rau hauv textile printing thiab dyeing txheej txheem vim lawv thickening thiab stabilizing zog.
Cellulose ethers muaj ntau yam txiaj ntsig ib puag ncig:
Biodegradability:
Tsis zoo li ntau cov khoom siv hluavtaws, cellulose ethers yog biodegradable, txhais tau tias lawv tawg los ntawm cov txheej txheem ntuj, txo lawv qhov cuam tshuam rau ib puag ncig.
Renewable Zog:
Cellulose, cov khoom siv raw rau cellulose ethers, yog muab los ntawm cov khoom siv txuas ntxiv dua tshiab xws li ntoo thiab tsob ntoo fibers.
Txo dependence rau petrochemicals:
Kev siv cov cellulose ethers hauv ntau daim ntawv thov txo qis kev cia siab ntawm petrochemical polymers thiab pab txhawb kom muaj kev ruaj ntseg dua.
Cov kev sib tw thiab cov lus qhia yav tom ntej
Thaum cellulose ethers muaj ntau qhov zoo, kuj tseem muaj qee qhov kev sib tw, xws li kev txwv thermal stability thiab muaj peev xwm hloov pauv hauv cov khoom raws li cov khoom siv cellulose.Kev tshawb fawb tsis tu ncua yog tsom rau kev daws cov teeb meem no thiab tshawb nrhiav cov ntawv thov tshiab ntawm cellulose ethers hauv thaj chaw tshiab.
Cellulose ethers yog muab los ntawm ntau cov cellulose tauj dua tshiab thiab ua lub luag haujlwm tseem ceeb hauv ntau yam lag luam.Txawm hais tias lawv tsis yog cov khoom siv niaj hnub, lawv cov khoom ua rau kev tsim cov khoom lag luam thiab cov txheej txheem.Raws li kev lag luam txuas ntxiv mus nrhiav lwm txoj hauv kev ruaj ntseg, cellulose ethers yuav nyob twj ywm ntawm qhov ua ntej ntawm kev tsim kho tshiab, tsav kev nce qib hauv ntau yam kev siv.
Post lub sij hawm: Jan-18-2024