I-CMC imvamisa i-anionic polymer elungiselelwe ukuphendula i-cellulose yemvelo nge-caustic alkali ne-moochlororoy acid, ngesisindo samangqamuzana esingu-6400 (± 1 000). Imikhiqizo esemqoka yi-sodium chloride ne-sodium glycolate. I-CMC ingeyokuguqulwa kwemvelo yeselula. Ibizwe ngokusemthethweni "I-Modified Cellulose" ngeNhlangano Yezolimo Nezolimo ye-United Nations (FAO) kanye ne-World Health Organisation (WHO).
isimo
Izinkomba eziphambili ukukala ikhwalithi ye-CMC yizinga lokufakwa esikhundleni (DS) nobumsulwa. Ngokuvamile, izakhiwo ze-CMC zihlukile lapho ama-DS ehlukile; Izinga eliphakeme lokufaka esikhundleni sokufaka esikhundleni, okungcono i-solubity, kanye nokwenza okungcono nokuqina kwesixazululo. Ngokusho kwemibiko, ukuvela kosulwa kwe-CMC kungcono lapho izinga lokufaka esikhundleni se-0.7-1.2, kanye nokubonakala kwesisombululo salo esinamanzi amakhulu lapho inani le-PH lingu-6-9. Ukuze uqinisekise ikhwalithi yayo, ngaphezu kokukhethwa kwe-ejenti ethembisayo, ezinye izinto ezithinta izinga lokufakwa esikhundleni kanye nobumsulwa kufanele futhi zibhekwe, njengobudlelwano be-dosage phakathi kwe-alkali kanye ne-etherifing, okuqukethwe kwamanzi, izinga lokushisa , Ivelu ye-PH, ukugxilisa izixazululo nosawoti.
Ukuhlaziywa kwezinzuzo nobubi be-sodium carboxymethyl cellulose
Ukuthuthukiswa kwe-sodium carboxymethyl cellulose akuhambelani ngempela. Ikakhulu eminyakeni yamuva nje, ukwanda kwezinkambu zohlelo lokusebenza kanye nokwehliswa kwezindleko zokukhiqiza zenze ukukhiqizwa kweCarboxymethyl cellulose ngaphezulu. Imikhiqizo ethengiswayo ixubile.
Ngemuva kwalokho, unganquma kanjani ikhwalithi ye-sodium carboxymetyl celtuleose, sihlaziya kusuka ekuhlolweni okuthile ngokomzimba nangamakhemikhali:
Okokuqala, kungahlukaniswa ngokushisa kwayo kwe-carbonization. Ukushisa okujwayelekile kwe-carbonazation ye-sodium carboxymetyl celtulose kungu-280-300 ° C. Uma kuthathwe i-carbonised ngaphambi kokuthi lokhu kushisa kufinyelelwe, khona-ke lo mkhiqizo unezinkinga. (Ngokuvamile i-carbonization isebenzisa isithando somlilo)
Okwesibili, kuhlukaniswa ngamazinga okushisa awo wokuhlukana. Ngokuvamile, i-sodium carboxyyyl celtulose izoshintsha umbala lapho ifinyelela emazingeni okushisa athile. Uhla lokushisa lungu-190-200 ° C.
Okwesithathu, kungakhonjwa ngokubukeka kwayo. Ukuvela kwemikhiqizo eminingi kungumpuphu omhlophe, futhi usayizi wayo wezinhlayiyana ngokuvamile yi-100 mesh, futhi amathuba okudlula kuwo angama-98,5%.
I-Sodium Carboxymethyl celtuleose ngumkhiqizo we-cellulose esetshenziswe kabanzi futhi unezicelo ezahlukahlukene, ngakho-ke kungaba nokulingiswa okuthile emakethe. Ngakho-ke ukuthi ungakubona kanjani ukuthi ngabe kungumkhiqizo odingwa ngabasebenzisi bangadlulisela isivivinyo esilandelayo sokuhlonza.
Khetha u-0.5g we-sodium carboxymethyl cellulose, engaqiniseki ukuthi ngabe kungumkhiqizo we-sodium carboxyylsellellellellellellellellulose, ukhiphe ku-50ml wamanzi bese uvusa ama-60 ~ 70 ℃, nokushisa imizuzu engama-20 kuye Yenza ikhambi elifanayo, lipholile ngemuva kokutholwa koketshezi, kwaqhutshwa izivivinyo ezilandelayo.
1. Faka amanzi kwikhambi lokuhlola ukuze unciphise izikhathi ezi-5, engeza u-0.5ml wesisombululo se-chromotropic acid sokuvuna kwayo, bese usishisa kubhavu wamanzi imizuzu eyi-10 ukuze ubonakale onsomi obomvu.
2. Faka i-10 ml ye-acetone kuya ku-5 ml sokhakha lokuhlola, unikine uhlanganise kahle ukukhiqiza i-mbala emhlophe ye-flocculent.
3. Faka i-1ml ye-Ketone Sulfate Test Solution ku-5ML yesisombululo sokuhlola, hlanganisa bese unikina ukuze ukhiqize i-Fleary Blue Flecciate.
4. Izinsalela ezitholwe ngokuhamba kwalo mkhiqizo zikhombisa ukusabela okujwayelekile kukasawoti we-sodium, okungukuthi, i-sodium carboxymethyl cellulose.
Ngalezi zinyathelo, ungakhomba ukuthi umkhiqizo othengiwe yi-sodium carboxymetyl celtuleose kanye nokumsulwa kwawo, okunikeza indlela elula futhi engokoqobo yabasebenzisi ukulungisa kahle imikhiqizo
Isikhathi sePosi: Nov-12-2022