CMC yawanci wani sinadari ne na anionic wanda ake samarwa ta hanyar yin reaction cellulose na halitta tare da caustic alkali da monochloroacetic acid, wanda nauyin kwayoyin halitta ya kai 6400 (±1000). Manyan abubuwan da ke cikinsa sune sodium chloride da sodium glycolate. CMC na cikin gyaran cellulose na halitta. Hukumar Abinci da Noma ta Majalisar Dinkin Duniya (FAO) da Hukumar Lafiya ta Duniya (WHO) sun kira shi "modified cellulose" a hukumance.
inganci
Manyan alamomin da za a auna ingancin CMC sune matakin maye gurbin (DS) da tsarki. Gabaɗaya, halayen CMC sun bambanta lokacin da DS ya bambanta; mafi girman matakin maye gurbin, mafi kyawun narkewa, kuma mafi kyawun bayyanawa da kwanciyar hankali na maganin. A cewar rahotanni, bayyanawar CMC ya fi kyau lokacin da matakin maye gurbin shine 0.7-1.2, kuma ɗanɗanon ruwan maganin sa shine mafi girma lokacin da ƙimar pH shine 6-9. Domin tabbatar da ingancinsa, ban da zaɓin wakilin etherifying, dole ne a yi la'akari da wasu abubuwan da ke shafar matakin maye gurbin da tsarki, kamar dangantakar da ke tsakanin maganin alkali da etherifying, lokacin etherification, yawan ruwan tsarin, zafin jiki, ƙimar pH, yawan maganin da gishiri.
Binciken fa'idodi da rashin amfanin sodium carboxymethyl cellulose
Haɓaka sinadarin sodium carboxymethyl cellulose hakika ba a taɓa ganin irinsa ba. Musamman a cikin 'yan shekarun nan, faɗaɗa filayen amfani da kuma rage farashin samarwa ya sa ƙera sinadarin carboxymethyl cellulose ya zama ruwan dare. Kayayyakin da ake sayarwa sun haɗu.
To, yadda za a tantance ingancin sodium carboxymethyl cellulose, za mu yi nazari daga wasu ra'ayoyi na zahiri da na sinadarai:
Da farko dai, ana iya bambanta shi da zafin carbonization ɗinsa. Yanayin carbonization gabaɗaya na sodium carboxymethyl cellulose shine 280-300 ° C. Idan aka haɗa shi da carbon kafin a kai wannan zafin, to wannan samfurin yana da matsala. (Gabaɗaya carbonization yana amfani da tanda mai murfi)
Na biyu, ana bambanta shi ta hanyar yanayin canjin launinsa. Gabaɗaya, sodium carboxymethyl cellulose zai canza launi idan ya kai wani yanayi na zafin jiki. Matsakaicin zafin shine 190-200 °C.
Na uku, ana iya gane shi daga bayyanarsa. Bayyanar yawancin samfuran farar foda ce, kuma girman barbashi gabaɗaya raga 100 ne, kuma yuwuwar wucewa ta ciki shine kashi 98.5%.
Sodium carboxymethyl cellulose samfurin cellulose ne da ake amfani da shi sosai kuma yana da aikace-aikace iri-iri, don haka akwai wasu kwafi a kasuwa. Don haka yadda ake gane ko samfurin ne da masu amfani ke buƙata za a iya cin jarrabawar tantancewa mai zuwa.
Zaɓi 0.5g na sodium carboxymethyl cellulose, wanda ba shi da tabbas ko samfurin sodium carboxymethylcellulose ne, a narkar da shi a cikin 50ml na ruwa a gauraya, a ƙara ɗan ƙaramin adadin a kowane lokaci, a gauraya a zafin 60 ~ 70 ℃, sannan a dafa na minti 20 don yin ruwan iri ɗaya, a sanyaya. Bayan an gano ruwan, an yi gwaje-gwaje masu zuwa.
1. A zuba ruwa a cikin maganin gwajin don ya narke sau 5, a zuba 0.5mL na maganin gwajin chromotropic acid a cikin digo 1 na maganin, sannan a dumama shi a cikin ruwan wanka na tsawon mintuna 10 don ya yi ja-shuɗi.
2. A zuba 10 mL na acetone a cikin 5 mL na maganin gwaji, a girgiza sannan a gauraya sosai don samar da farin ruwa mai kama da ruwa.
3. A zuba 1mL na maganin gwajin ketone sulfate a cikin 5mL na maganin gwaji, a gauraya sannan a girgiza don samar da ruwan sama mai launin shuɗi mai haske.
4. Ragowar da aka samu ta hanyar ashing na wannan samfurin yana nuna yadda aka saba da sinadarin gishirin sodium, wato, sinadarin sodium carboxymethyl cellulose.
Ta hanyar waɗannan matakai, za ku iya gano ko samfurin da aka saya shine sodium carboxymethyl cellulose da kuma tsarkinsa, wanda ke ba da hanya mai sauƙi da amfani ga masu amfani don zaɓar samfuran daidai.
Lokacin Saƙo: Nuwamba-12-2022