Methyl cellulose (MC) ua los ntawm cov khoom ntuj tsim

Methyl cellulose (MC) yog ib tug derivative ntawm cellulose, uas yog ib tug natural polymer pom nyob rau hauv lub cell phab ntsa ntawm cov nroj tsuag. Cellulose yog ib qho ntawm feem ntau cov organic tebchaw nyob rau hauv lub ntiaj teb, feem ntau yog los ntawm cov ntoo pulp thiab paj rwb fibers. MC yog synthesized los ntawm cellulose los ntawm ib tug series ntawm cov tshuaj tiv thaiv uas muaj kev hloov ntawm hydroxyl pawg (-OH) nyob rau hauv lub cellulose molecule nrog methyl pawg (-CH3).

Thaum MC nws tus kheej yog cov tshuaj hloov kho, nws cov khoom siv raw, cellulose, yog muab los ntawm cov khoom ntuj tsim. Cellulose tuaj yeem muab rho tawm los ntawm ntau yam khoom siv cog, suav nrog ntoo, paj rwb, hemp, thiab lwm yam nroj tsuag fibrous. Cov cellulose tau ua tiav kom tshem tawm cov impurities thiab hloov mus rau hauv daim ntawv siv tau rau kev tsim MC.

Thaum cov cellulose tau txais, nws nkag mus rau etherification los qhia methyl pawg mus rau cellulose qaum, uas ua rau tsim cov methyl cellulose. Cov txheej txheem no suav nrog kev kho cellulose nrog kev sib xyaw ntawm sodium hydroxide thiab methyl chloride raws li kev tswj hwm.

Lub resulting methyl cellulose yog ib tug dawb mus rau dawb, tsw, thiab tasteless hmoov uas yog soluble nyob rau hauv dej txias thiab tsim ib tug viscous tov. Nws yog dav siv nyob rau hauv ntau yam lag luam, nrog rau cov khoom noj, tshuaj, kev kho tus kheej, thiab kev tsim kho, rau nws thickening, stabilizing, thiab zaj duab xis-tsim zog.

Thaum MC yog ib qho kev hloov kho tshuaj, nws tau muab los ntawm cov cellulose ntuj, ua rau nws muaj kev xaiv biodegradable thiab ib puag ncig zoo rau ntau daim ntawv thov.