Sodium carboxymethyl selulose (CMC), izwi kandi nka carboxymethyl selulose. Nibintu byinshi bya polymer selulose ether byateguwe muguhindura imiti ya selile isanzwe, kandi imiterere yabyo igizwe ahanini na D-glucose ibice bihujwe na β_ (14) glycosidic.
CMC ni ifu yera cyangwa amata yera ya fibrous cyangwa granules ifite ubucucike bwa 0.5g / cm3, hafi uburyohe, butagira impumuro nziza na hygroscopique.
Carboxymethyl selulose iroroshye kuyikwirakwiza, ikora igisubizo kibonerana mu mazi, kandi ntigishobora gukemuka mumashanyarazi nka Ethanol.
Iyo pH> 10, pH agaciro ka 1% igisubizo cyamazi ni 6.5≤8.5.
Igisubizo nyamukuru niki gikurikira: selile naturel yabanje kubangikanya na NaOH, hanyuma hongerwamo aside ya chloroacetike, hanyuma hydrogène iri mumatsinda ya hydroxyl kumurwi wa glucose ikora hamwe na carboxymethyl muri aside ya chloroacetic.
Birashobora kugaragara uhereye kumiterere ko hariho amatsinda atatu ya hydroxyl kuri buri gice cya glucose, aricyo C2, C3 na C6 hydroxyl, naho urwego rwo gusimbuza hydrogène kumatsinda ya hydroxyl ya glucose yibice byerekana ibimenyetso bifatika.
Niba hydrogène kumatsinda atatu hydroxyl kuri buri gice isimbuwe nitsinda rya carboxymethyl, noneho urwego rwo gusimburwa rusobanurwa nka 7-8, hamwe nurwego ntarengwa rwo gusimbuza 1.0 (urwego rwibiryo rushobora kugera kuriyi mpamyabumenyi gusa). Urwego rwo gusimbuza CMC rugira ingaruka ku buryo butaziguye gukemuka, emulisile, kubyimba, gutuza, kurwanya aside no kurwanya umunyu wa CMC.
Mugihe dukoresha ibicuruzwa bya CMC, dukwiye gusobanukirwa byimazeyo ibipimo ngenderwaho byingenzi, nko gutuza, kwijimye, kurwanya aside, ibishishwa, nibindi.
Nibyo, porogaramu zitandukanye zikoresha carboxymethyl selile zitandukanye, kuko hariho ubwoko bwinshi bwubwiza bukora kuri carboxymethyl selulose, kandi ibipimo byumubiri na chimique nabyo biratandukanye. Kumenya ibi, urashobora kumenya guhitamo ibicuruzwa byiza.
Igihe cyo kohereza: Ugushyingo-07-2022