Ni uruhe ruhare selulose ether igira muri minisiteri ivanze?

Cellulose ether ni polymer yubukorikori ikozwe muri selile naturel binyuze muburyo bwo guhindura imiti.Cellulose ether ni inkomoko ya selile naturel.Umusaruro wa selulose ether uratandukanye na polymrike ya synthique.Ibikoresho byibanze byingenzi ni selile, ibinyabuzima bisanzwe bya polymer.Bitewe numwihariko wimiterere ya selile isanzwe, selile ubwayo ntabwo ifite ubushobozi bwo kubyitwaramo na etherification.Ariko, nyuma yo kuvura imiti yabyimbye, imiyoboro ikomeye ya hydrogène iri hagati yiminyururu ya molekile n'iminyururu irasenyuka, kandi kurekura gukomeye kwitsinda hydroxyl bihinduka selile ya alkali selile.Kubona selile ether.

Ibiranga selile ya selile biterwa n'ubwoko, umubare no gukwirakwiza insimburangingo.Itondekanya rya selile ya selile nayo ishingiye ku bwoko bwinsimburangingo, urwego rwa etherification, solubile hamwe nibisabwa bijyanye.Ukurikije ubwoko bwinsimburangingo kumurongo wa molekile, irashobora kugabanywamo monoether hamwe na ether ivanze.Mubisanzwe dukoresha mc nka monoether, na HPmc nka ether ivanze.Methyl selulose ether mc nigicuruzwa nyuma yitsinda rya hydroxyl kumurongo wa glucose ya selile ya selile isanzwe isimburwa nitsinda ryimikorere.Nibicuruzwa byabonetse mugusimbuza igice cyitsinda rya hydroxyl kumurongo hamwe nitsinda ryimikorere naho ikindi gice hamwe nitsinda rya hydroxypropyl.Imiterere yuburyo ni [C6H7O2 (OH) 3-mn (OCH3) m [OCH2CH (OH) CH3] n] x Hydroxyethyl methyl selulose ether HEmc, ubu ni ubwoko bwingenzi bukoreshwa cyane kandi bugurishwa ku isoko.

Kubijyanye no kwikemurira ibibazo, birashobora kugabanywamo ionic na non-ionic.Amazi ashonga adafite ionic selulose ethers agizwe ahanini nuruhererekane rwibintu bibiri bya alkyl ethers na hydroxyalkyl ethers.Ionic Cmc ikoreshwa cyane mubikoresho byogeza, gucapa imyenda no gusiga irangi, ibiryo nubushakashatsi bwamavuta.Non-ionic mc, HPmc, HEmc, nibindi bikoreshwa cyane mubikoresho byubwubatsi, gutwikira latx, imiti, imiti ya buri munsi, nibindi bikoreshwa nkibibyimbye, bigumana amazi, stabilisateur, ikwirakwiza hamwe nogukora firime.


Igihe cyo kohereza: Ugushyingo-24-2022