Dab tsi yog qhov txawv ntawm cellulose ether thiab cellulose?

Cellulose thiab cellulose ether yog ob qho tib si muab los ntawm cellulose, ib tug natural polymer pom nyob rau hauv cell phab ntsa ntawm cov nroj tsuag. Txawm li cas los xij, lawv muaj qhov sib txawv ntawm lawv cov qauv tshuaj thiab cov khoom:

1. Chemical Structure: Cellulose yog linear polysaccharide uas muaj cov piam thaj rov qab txuas ua ke los ntawm β (1 → 4) glycosidic bonds. Nws yog ib qho ncaj-chain polymer nrog qib siab ntawm crystallinity.
2. Hydrophilicity: Cellulose yog inherently hydrophilic, lub ntsiab lus nws muaj ib tug muaj zog affinity rau dej thiab yuav nqus tau cov dej noo tseem ceeb. Cov cuab yeej no cuam tshuam rau nws tus cwj pwm hauv ntau daim ntawv thov, suav nrog nws cov kev cuam tshuam nrog cov dej hauv dej xws li cov cement sib tov.
3. Solubility: Ntshiab cellulose yog insoluble hauv dej thiab feem ntau cov kuab tshuaj organic vim nws cov qauv crystalline heev thiab nws kim heev hydrogen bonding ntawm polymer chains.
4. Derivatization: Cellulose ether yog ib daim ntawv hloov kho ntawm cellulose tau los ntawm tshuaj derivatization. Cov txheej txheem no suav nrog kev qhia cov pab pawg ua haujlwm, xws li hydroxyethyl, hydroxypropyl, methyl, lossis carboxymethyl pawg, mus rau hauv cov pob txha cellulose. Cov kev hloov kho no hloov cov khoom ntawm cellulose, nrog rau nws cov solubility, rheological cwj pwm, thiab kev sib cuam tshuam nrog lwm yam tshuaj.
5. Solubility nyob rau hauv dej: Cellulose ethers feem ntau yog soluble los yog dispersible nyob rau hauv dej, nyob ntawm seb hom thiab degree ntawm kev hloov. Qhov solubility no ua rau lawv muaj txiaj ntsig zoo hauv ntau yam kev lag luam, suav nrog tshuaj, khoom noj, tshuaj pleev ib ce, thiab kev tsim kho.
6. Daim ntawv thov: Cellulose ethers pom dav daim ntawv thov raws li thickening agents, stabilizers, binders, thiab film-forming agents nyob rau hauv ib tug ntau yam ntawm cov khoom thiab cov txheej txheem. Hauv kev tsim kho, lawv feem ntau siv los ua cov khoom ntxiv hauv cov khoom siv cement los txhim kho kev ua haujlwm, dej tuav, adhesion, thiab lwm yam khoom.

Hauv cov ntsiab lus, thaum cellulose thiab cellulose ether sib koom ua ke, cellulose ether yog tshuaj hloov kho los qhia cov khoom tshwj xeeb uas ua rau nws soluble lossis dispersible hauv dej thiab tsim nyog rau ntau yam kev siv uas tswj hwm tus cwj pwm rheological thiab kev cuam tshuam nrog lwm yam tshuaj.