Ntau yam kev siv ntawm cellulose thiab nws cov derivatives

Cellulose yog macromolecular polysaccharide tsim los ntawm cov piam thaj, uas muaj nyob rau hauv ntau ntau hauv cov nroj tsuag ntsuab thiab cov kab mob marine. Nws yog cov khoom siv dav dav tshaj plaws thiab loj tshaj plaws ntawm cov khoom siv polymer hauv cov xwm txheej. Nws muaj biocompatibility zoo, txuas dua tshiab thiab Biodegradable thiab lwm yam zoo. Los ntawm photosynthesis, cov nroj tsuag tuaj yeem tsim ntau pua lab tons ntawm cellulose txhua xyoo.

Cellulose Application Prospects

Ib txwm siv cellulose tau siv dav vim nws tus kheej lub cev thiab tshuaj lom neeg, thaum lub ntuj tsim cov khoom siv polymer cellulose muaj cov khoom siv sib txawv tom qab ua thiab hloov kho, uas tuaj yeem ua tau raws li qhov sib txawv ntawm ntau yam kev lag luam. Kev siv cov khoom siv cellulose ua haujlwm tau dhau los ua kev txhim kho ntuj tsim thiab kev tshawb fawb hotspots ntawm cov ntaub ntawv polymer.

Cellulose derivatives yog tsim los ntawm esterification los yog etherification ntawm hydroxyl pawg nyob rau hauv cellulose polymers nrog tshuaj reagents. Raws li cov yam ntxwv ntawm cov khoom siv tshuaj tiv thaiv, cellulose derivatives tuaj yeem muab faib ua peb pawg: cellulose ethers, cellulose esters, thiab cellulose ether esters.

1. Cellulose ether

Cellulose ether yog ib lub ntsiab lus dav dav rau ntau cov cellulose derivatives tsim los ntawm cov tshuaj tiv thaiv ntawm alkali cellulose thiab etherifying tus neeg saib xyuas nyob rau hauv tej yam kev mob. Cellulose ether yog ib hom cellulose derivative nrog ntau hom, daim ntawv thov dav, ntim ntau lawm thiab kev tshawb fawb siab. Nws daim ntawv thov koom nrog ntau yam xws li kev lag luam, kev ua liaj ua teb, kev lag luam tshuaj txhua hnub, kev tiv thaiv ib puag ncig, aerospace thiab kev tiv thaiv hauv tebchaws.

Cov cellulose ethers uas tau ua lag luam yog: methyl cellulose, carboxymethyl cellulose, ethyl cellulose, hydroxyethyl cellulose, cyanoethyl cellulose, hydroxypropyl cellulose thiab hydroxypropyl methylcellulose Cellulose thiab lwm yam.

2. Cellulose esters

Cellulose esters yog dav siv nyob rau hauv lub teb chaws tiv thaiv, tshuaj lom neeg kev lag luam, biology, tshuaj, kev tsim kho thiab txawm aerospace.

Cov cellulose esters uas tau siv ua lag luam yog: cellulose nitrate, cellulose acetate, cellulose acetate butyrate thiab cellulose xanthate.
3. Cellulose ether ester

Cellulose ether esters yog ester-ether sib xyaw derivatives.

Daim ntawv thov teb

1. Pharmaceutical teb

Cellulose ether thiab ester derivatives yog dav siv nyob rau hauv cov tshuaj rau thickening, excipient, sustained tso, tswj kev tso tawm, zaj duab xis tsim thiab lwm yam hom phiaj.

2. Txheej teb

Cellulose esters ua lub luag haujlwm tseem ceeb hauv kev siv txheej txheej. Cellulose esters yog siv rau hauv binders, hloov resins los yog pre-film cov ntaub ntawv los muab coatings nrog ntau yam zoo heev.

3. Membrane technology teb

Cellulose thiab derivative cov ntaub ntawv muaj qhov zoo ntawm cov zis loj, kev ua haujlwm ruaj khov, thiab rov ua dua tshiab. Los ntawm txheej txheej-los-txheej nws tus kheej-them, theem inversion txoj kev, electrospinning technology thiab lwm yam txhais tau tias, cov ntaub ntawv membrane nrog kev sib cais zoo heev tuaj yeem npaj tau. Nyob rau hauv daim teb ntawm membrane technology dav siv.

4. Kev tsim kho thaj chaw

Cellulose ethers muaj siab thermally reversible gel lub zog thiab yog li ntawd pab tau raws li additives nyob rau hauv kev tsim kho Cheebtsam, xws li cement-raws li pobzeb nplaum additives.

5. Aerospace, tsheb tshiab lub zog thiab cov khoom siv hluav taws xob siab

Cellulose-based functional optoelectronic cov ntaub ntawv yuav siv tau nyob rau hauv aerospace, lub zog tshiab tsheb thiab high-end electronics.

6. Lwm qhov chaw

Teeb meem thiab kev daws teeb meem hauv Cellulose Application

Tam sim no, cellulose tseem muaj qee qhov tsis txaus ntseeg. Vim yog cov yam ntxwv ntawm nws cov qauv sib sau ua ke, cellulose tsis tuaj yeem yaj thiab nyuaj rau yaj hauv cov kuab tshuaj, uas txwv kev txhim kho thiab siv cov khoom siv cellulose zoo heev. Xws li tsis zoo solubility nyob rau hauv cov kuab tshuaj, tsis muaj thermoplasticity, siab hydrophilicity thiab tsis muaj antibacterial zog.

Yog li ntawd, kev tsim thiab kev tsim cov ntaub ntawv tshiab ntawm cellulose-derived yog lub hauv paus rau kev siv cellulose kom zoo, thiab kev txhim kho ntawm cov tshuab ntxuav cellulose kom huv si yog ib txoj hauv kev tseem ceeb thiab lav rau kev siv cellulose kom zoo.