Dab tsi yog ethylcellulose ua los ntawm?

Ethyl cellulose yog ib qho hluavtaws polymer uas tau muab los ntawm cov cellulose ntuj, ib qho kev sib xyaw ua ke ntawm cov phab ntsa ntawm cov nroj tsuag. Kev tsim cov ethyl cellulose koom nrog kev hloov kho tshuaj ntawm cov cellulose ntuj siv ethyl chloride thiab cov catalyst los tsim cov ethyl ether derivative ntawm cellulose.

Cov txheej txheem pib nrog kev ua kom huv ntawm cellulose los ntawm cov nroj tsuag, xws li ntoo pulp lossis paj rwb. Cov purified cellulose yog ces yaj nyob rau hauv ib tug sib tov ntawm cov kuab tshuaj, xws li ethanol thiab dej, los tsim ib tug viscous kua. Tom qab ntawd ethyl chloride ntxiv rau cov tshuaj, nrog rau cov catalyst, uas pab txhawb cov tshuaj tiv thaiv ntawm cellulose thiab ethyl chloride.

Thaum lub sij hawm cov tshuaj tiv thaiv, cov ethyl chloride molecule hloov ib co ntawm cov hydroxyl pawg ntawm cov cellulose saw, uas ua rau tsim ntawm ethyl cellulose. Lub degree ntawm ethoxylation, los yog tus naj npawb ntawm ethyl pawg txuas mus rau txhua chav tsev piam thaj hauv cellulose saw, tuaj yeem tswj tau thaum lub sij hawm cov tshuaj tiv thaiv los tsim ethyl cellulose nrog cov khoom sib txawv thiab cov yam ntxwv solubility.

Tom qab cov tshuaj tiv thaiv tiav, qhov tshwm sim ethyl cellulose yog purified thiab qhuav kom tshem tawm cov kuab tshuaj ntxiv los yog impurities. Cov khoom kawg yog cov hmoov dawb los yog daj daj uas yog soluble hauv ntau cov organic solvents, tab sis insoluble hauv dej.

Zuag qhia tag nrho, ethyl cellulose yog ib qho hluavtaws polymer uas tau muab los ntawm cov cellulose ntuj los ntawm kev hloov tshuaj lom neeg uas koom nrog kev sib ntxiv ntawm ethyl pawg rau cov saw cellulose.