Ubusanzwe CMC ni polymeri ya anionic ikorwa binyuze mu guhuza cellulose karemano hamwe na aside caustic alkali na monochloroacetic, ifite uburemere bwa molekile 6400 (± 1 000). Ibikomoka ku bintu by'ingenzi ni sodium chloride na sodium glycolate. CMC ni iy'uburyo cellulose ihinduka karemano. Ishami ry'Umuryango w'Abibumbye ryita ku biribwa n'ubuhinzi (FAO) n'Ishami ry'Umuryango w'Abibumbye ryita ku Buzima (OMS) ryitwa ku mugaragaro "cellulose ihinduka" (modified cellulose).
ireme
Ibipimo by'ingenzi bipima ubuziranenge bwa CMC ni urugero rwo gusimbuza (DS) n'ubuziranenge. Muri rusange, imiterere ya CMC iratandukanye iyo DS itandukanye; uko urugero rwo gusimbuza rurushaho kuba rwinshi, niko gushonga neza, kandi niko ubwiza n'ubudahangarwa by'umuti birushaho kuba byiza. Nk'uko raporo zibivuga, ubuziranenge bwa CMC buba bwiza iyo urugero rwo gusimbuza ruri hagati ya 0.7-1.2, kandi ubukana bw'umuti wayo w'amazi ni bwo bunini iyo agaciro ka pH kari hagati ya 6-9. Kugira ngo harebwe ubuziranenge bwayo, uretse guhitamo umuti utanga etherifying, hari ibintu bimwe na bimwe bigira ingaruka ku rugero rwo gusimbuza n'ubuziranenge bigomba kandi kuzirikanwa, nko isano iri hagati y'ingano ya alkali n'umuti utanga etherifying, igihe cyo gusimbuza etherification, ingano y'amazi mu buryo, ubushyuhe, agaciro ka pH, ingano y'umuti n'imyunyu.
Isesengura ry'ibyiza n'ibibi bya selulose ya sodium carboxymethyl
Iterambere rya selulose ya sodium carboxymethyl mu by'ukuri ntiririgeze ribaho mbere na mbere. Cyane cyane mu myaka ya vuba aha, kwaguka kw'ibicuruzwa bikoreshwa no kugabanya ikiguzi cyo gukora byatumye ikorwa rya selulose ya carboxymethyl rirushaho gukundwa. Ibicuruzwa biri kugurishwa biravangwa.
Hanyuma, uburyo bwo kumenya ubwiza bwa selulose ya sodium carboxymethyl, turasesengura dukurikije ibitekerezo bimwe na bimwe by’umubiri n’ibinyabutabire:
Mbere na mbere, ishobora gutandukanywa n'ubushyuhe bwayo bwo gukaraba. Ubushyuhe rusange bwo gukaraba bwa sodium carboxymethyl cellulose ni 280-300 ° C. Iyo ishyizwemo karuboni mbere y'uko ubu bushyuhe bugera, icyo gicuruzwa kigira ibibazo. (Muri rusange, gukaraba hakoreshejwe muffle furnace)
Icya kabiri, itandukanira ku bushyuhe bwayo bwo guhindura ibara. Muri rusange, selulose ya sodium carboxymethyl izahindura ibara iyo igeze ku bushyuhe runaka. Ubushyuhe ni 190-200 °C.
Icya gatatu, ishobora kumenyekana uhereye ku miterere yayo. Imiterere y'ibicuruzwa byinshi ni ifu y'umweru, kandi ingano y'uduce twayo muri rusange ni mesh 100, kandi amahirwe yo kunyuramo ni 98.5%.
Selulosi ya sodium carboxymethyl ni ikintu gikoreshwa cyane muri selulosi kandi gifite uburyo bwinshi bwo kuyikoresha, bityo hashobora kubaho ibintu bimwe na bimwe byigana ku isoko. Uburyo bwo kumenya niba ari ikintu gikenewe n'abagikoresha bushobora gutsinda ikizamini gikurikira cyo kumenya.
Hitamo garama 0.5 za selulose ya sodium carboxymethyl, utazi neza niba ari umusaruro wa sodium carboxymethylcellulose, uyishongeshe muri 50ml z'amazi hanyuma uyivange, ongeramo agace gato buri gihe, uvange kuri 60 ~ 70 ℃, hanyuma ushyushye iminota 20 kugira ngo ubone umuti umwe, ukonje Nyuma yo kubona amazi, hakozwe ibizamini bikurikira.
1. Shyiramo amazi mu gipimo cyo gupima kugira ngo uvange inshuro 5, ongeramo 0.5mL y'igipimo cyo gupima aside chromotropic ku gitonyanga kimwe cyayo, hanyuma uyishyushye mu bwogero bw'amazi mu gihe cy'iminota 10 kugira ngo isa n'umutuku n'umuhengeri.
2. Shyiramo mL 10 za acetone kuri mL 5 z'umuti w'igerageza, uzunguze hanyuma uvange neza kugira ngo habeho umweru utembagara.
3. Shyiramo 1mL y'umuti wa ketone sulfate kuri 5mL y'umuti wa test, uvange hanyuma unyeganyeze kugira ngo habeho ubururu bworoheje bworoshye.
4. Ibisigazwa biboneka binyuze mu gusiga ivu ry'uyu muti bigaragaza uburyo umunyu wa sodiyumu usanzwe ukora, ni ukuvuga selulose ya sodiyumu carboxymethyl.
Ukoresheje izi ntambwe, ushobora kumenya niba ibicuruzwa byaguzwe ari selulosi ya sodium carboxymethyl n'ubuziranenge bwayo, ibyo bikaba bitanga uburyo bworoshye kandi bufatika ku bakoresha bwo guhitamo neza ibicuruzwa.
Igihe cyo kohereza: Ugushyingo-12-2022