CMC galibi wani fili ne na polymer anionic wanda aka shirya ta hanyar amsa cellulose na halitta tare da caustic alkali da monochloroacetic acid, tare da nauyin kwayoyin halitta na 6400 (± 1 000). Babban abubuwan da aka samo sune sodium chloride da sodium glycolate. CMC nasa ne na gyaran cellulose na halitta. Hukumar Abinci da Aikin Noma ta Majalisar Dinkin Duniya (FAO) da Hukumar Lafiya ta Duniya (WHO) sun kira ta a hukumance "cellulose da aka gyara".
inganci
Babban alamun don auna ingancin CMC shine matakin maye gurbin (DS) da tsabta. Gabaɗaya, kaddarorin CMC sun bambanta lokacin da DS ya bambanta; mafi girman matakin maye gurbin, mafi kyawun solubility, kuma mafi kyawun gaskiya da kwanciyar hankali na maganin. A cewar rahotanni, nuna gaskiya na CMC ya fi kyau lokacin da matakin maye gurbin shine 0.7-1.2, kuma danko na maganin ruwa shine mafi girma lokacin da darajar pH ta kasance 6-9. Don tabbatar da ingancinsa, ban da zaɓin wakili na etherifying, dole ne a yi la'akari da wasu abubuwan da suka shafi matakin maye gurbin da tsabta, kamar dangantakar sashi tsakanin alkali da etherifying wakili, lokacin etherification, tsarin ruwa abun ciki, zazzabi. , pH darajar, bayani maida hankali da kuma salts.
Binciken fa'idodi da rashin amfani da sodium carboxymethyl cellulose
Ci gaban sodium carboxymethyl cellulose hakika ba a taɓa ganin irinsa ba. Musamman a cikin 'yan shekarun nan, fadada filayen aikace-aikacen da rage farashin samarwa ya sa masana'antar carboxymethyl cellulose ta shahara sosai. Abubuwan da ake sayarwa suna gauraye.
Sa'an nan, yadda za a ƙayyade ingancin sodium carboxymethyl cellulose, mu yi nazari daga wasu jiki da kuma sinadaran mahallin:
Da farko, ana iya bambanta shi daga zafin jiki na carbonization. Babban zafin jiki na carbonization na sodium carboxymethyl cellulose shine 280-300 ° C. Lokacin da aka yi carbonized kafin wannan zafin jiki ya kai, to wannan samfurin yana da matsaloli. (Gaba ɗaya carbonization yana amfani da murfi tanderu)
Abu na biyu, an bambanta shi da yanayin zafinsa. Gabaɗaya, sodium carboxymethyl cellulose zai canza launi lokacin da ya kai wani zazzabi. Yanayin zafin jiki shine 190-200 ° C.
Na uku, ana iya gane shi daga kamanninsa. Bayyanar mafi yawan samfurori shine farin foda, kuma girman ƙwayar sa shine gabaɗaya raga 100, kuma yuwuwar wucewa shine 98.5%.
Sodium carboxymethyl cellulose samfurin cellulose ne da ake amfani da shi sosai kuma yana da aikace-aikace iri-iri, don haka ana iya samun wasu kwaikwayo a kasuwa. Don haka yadda ake gano ko samfur ne da masu amfani ke buƙata na iya wuce gwajin ganowa na gaba.
Zabi 0.5g na sodium carboxymethyl cellulose, wanda bai tabbata ba ko samfurin sodium carboxymethylcellulose ne, narke shi a cikin ruwa 50mL da motsawa, ƙara kadan kadan kowane lokaci, motsawa a 60 ~ 70 ℃, da kuma zafi na minti 20. yi daidaitaccen bayani, sanyi Bayan gano ruwa, an gudanar da gwaje-gwaje masu zuwa.
1. A zuba ruwa a cikin maganin gwajin don tsarma sau 5, ƙara 0.5mL na maganin chromotropic acid a cikin digo 1 nasa, sannan a zafi shi a cikin ruwan wanka na minti 10 don bayyana ja-purple.
2. Ƙara 10 ml na acetone zuwa 5 ml na maganin gwajin, girgiza kuma a gauraya sosai don samar da farin ruwa mai ruwa.
3. Ƙara 1mL na maganin gwajin gwajin sulfate na ketone zuwa 5mL na maganin gwajin, gauraya kuma girgiza don samar da hazo mai shuɗi mai haske.
4. Ragowar da aka samu ta hanyar toka na wannan samfurin yana nuna yanayin al'ada na sodium gishiri, wato, sodium carboxymethyl cellulose.
Ta hanyar waɗannan matakan, zaku iya gano ko samfurin da aka saya shine sodium carboxymethyl cellulose da tsabtarsa, wanda ke ba da ingantacciyar hanya mai sauƙi kuma mai amfani ga masu amfani don zaɓar samfuran daidai.
Lokacin aikawa: Nuwamba-12-2022