Carboxymethyl cellulose (CMC) wani nau'in cellulose ne mai narkewa da ruwa wanda ake amfani dashi sosai a masana'antu iri-iri, gami da abinci, magunguna, da kulawa na sirri. Matsayin maye gurbin (DS) muhimmin siga ne wanda ke shafar kaddarorin CMC. A cikin wannan labarin, za mu tattauna tasirin DS akan ingancin carboxymethyl cellulose.
Na farko, yana da mahimmanci a fahimci menene matakin maye gurbin. Matsayin maye gurbin yana nufin adadin ƙungiyoyin carboxymethyl a kowace naúrar glucose a cikin sarkar cellulose. Ana samar da CMC ta hanyar mayar da martani ga cellulose tare da sodium monochloroacetate da sodium hydroxide. A lokacin wannan dauki, ana maye gurbin ƙungiyoyin hydroxyl akan sarkar cellulose da ƙungiyoyin carboxymethyl. Za'a iya sarrafa matakin maye gurbin ta hanyar bambanta yanayin halayen, kamar tattarawar sodium hydroxide da sodium monochloroacetate, lokacin amsawa, da zafin jiki.
DS na CMC yana shafar kaddarorin sa na zahiri da sinadarai, kamar su solubility, danko, da kwanciyar hankali na thermal. CMC tare da ƙananan DS yana da matsayi mafi girma na crystallinity kuma ba shi da ruwa mai narkewa fiye da CMC tare da babban DS. Wannan shi ne saboda ƙungiyoyin carboxymethyl a cikin CMC tare da ƙananan DS suna samuwa a saman sarkar cellulose, wanda ya rage yawan ruwa. Sabanin haka, CMC tare da babban DS yana da tsarin amorphous kuma yana da ruwa mai narkewa fiye da CMC tare da ƙananan DS.
Dankin CMC shima yana shafar DS. CMC tare da ƙananan DS yana da ƙananan danko fiye da CMC tare da babban DS. Wannan saboda ƙungiyoyin carboxymethyl a cikin CMC tare da ƙananan DS suna nesa da juna, wanda ke rage hulɗar tsakanin sassan cellulose kuma yana rage danko. Sabanin haka, CMC tare da babban DS yana da danko mafi girma saboda ƙungiyoyin carboxymethyl sun fi kusa da juna, wanda ya kara yawan hulɗar tsakanin sassan cellulose kuma yana tayar da danko.
Baya ga kaddarorinsa na zahiri, DS na CMC kuma yana shafar abubuwan sinadarai. CMC tare da ƙananan DS ba shi da kwanciyar hankali a babban yanayin zafi da ƙimar pH fiye da CMC tare da babban DS. Wannan saboda ƙungiyoyin carboxymethyl a cikin CMC tare da ƙananan DS sun fi sauƙi ga hydrolysis kuma suna iya rushewa a ƙarƙashin yanayi mai tsanani. Sabanin haka, CMC tare da babban DS ya fi kwanciyar hankali a babban yanayin zafi da ƙimar pH saboda ƙungiyoyin carboxymethyl sun fi ɗaure da sarkar cellulose.
Lokacin aikawa: Maris-10-2023