Methylcellulose

Methyl cellulose, abbreviated li MC, tseem hu ua cellulose methyl ether, yog ib tug nonionic cellulose ether. Nws muaj cov tsos ntawm dawb, lub teeb daj los yog lub teeb grey hmoov, granular los yog fibrous, odorless, tasteless, non-toxic thiab non-irritating, hygroscopic.

Methylcellulose yog soluble hauv glacial acetic acid, tab sis insoluble nyob rau hauv cov organic solvents xws li ethanol, ether, acetone, thiab chloroform. Methylcellulose muaj cov khoom siv thermal tshwj xeeb. Thaum yaj hauv dej kub siab tshaj 50 ° C, nws tuaj yeem tawg sai sai thiab swells los tsim cov gel. Thaum cov dej kub poob qis dua 50 ° C, nws yuav yaj hauv dej los tsim cov kua dej. Cov tshuaj aqueous thiab cov ntawv gel tuaj yeem cuam tshuam nrog ib leeg.

Kev npaj ntawm methyl cellulose siv natural cellulose xws li paj rwb pulp thiab ntoo pulp ua raw cov ntaub ntawv, thiab yog kho nrog alkali (xws li sodium hydroxide, thiab lwm yam) kom tau alkali cellulose, thiab ces etherified los ntawm kev ntxiv methyl chloride. Cov tshuaj tiv thaiv ntawm qhov kub thiab txias, tom qab ntxuav, nruab nrab, lub cev qhuav dej, ziab thiab lwm yam txheej txheem, raws li cov khoom lag luam purity thiab cov ntsiab lus kev, methyl cellulose tuaj yeem muab faib ua cov tshuaj qib methyl cellulose, qib zaub mov methyl cellulose, hom phiaj methyl cellulose thiab lwm yam khoom. .

Methylcellulose tiv taus cov kua qaub thiab alkalis, roj, cua sov, kab mob thiab lub teeb. Nws muaj zoo thickening, film-forming, dej-retaining, emulsifying, wetting, dispersing, thiab nplaum zog.

Methylcellulose muaj ntau yam kev siv hauv qab, los ntawm cov txheej txheem, cov ntawv sau, cov nplaum rau textiles, luam ntawv thiab dyeing rau tshuaj thiab ua zaub mov. Ntau qhov kev lag luam muaj cov ntawv thov rau cov khoom lag luam thiab muaj qhov chaw dav dav. Tom qab kev txhim kho txuas ntxiv mus ntev, kuv lub teb chaws txoj kev lag luam methyl cellulose tau tsim ib qho kev ntsuas, thiab cov khoom lag luam tau dhau los ua ntau thiab zoo meej, tab sis nws yuav tsum ua kom zoo dua qub nyob rau hauv cov nqe lus ntawm kev teev thiab kev loj hlob!