I-CMC imvamisa iyinhlanganisela ye-anionic polymer elungiswa ngokuphendula i-cellulose yemvelo nge-caustic alkali ne-monochloroacetic acid, enesisindo samangqamuzana esingu-6400 (±1 000).Imikhiqizo eyinhloko yi-sodium chloride ne-sodium glycolate.I-CMC ingeyokuguqulwa kwe-cellulose yemvelo.Kuye kwabizwa ngokusemthethweni ngokuthi “i-cellulose eguquliwe” yiNhlangano Yezokudla Nezolimo yeNhlangano Yezizwe Ezihlangene (i-FAO) kanye neNhlangano Yezempilo Yomhlaba (WHO).
izinga
Izinkomba eziyinhloko zokukala ikhwalithi ye-CMC yizinga lokushintshwa (DS) nobumsulwa.Ngokuvamile, izakhiwo ze-CMC zihlukile uma i-DS ihlukile;ukuphakama kwezinga lokushintsha, kungcono ukuncibilika, kanye nokuba sobala nokuzinza kwesixazululo.Ngokwemibiko, ukucaca kwe-CMC kungcono uma izinga lokushintshwa liyi-0.7-1.2, futhi i-viscosity yesisombululo sayo esinamanzi inkulu kakhulu lapho inani le-pH liyi-6-9.Ukuze kuqinisekiswe ikhwalithi yayo, ngaphezu kokukhethwa kwe-ejenti yokufaka i-etherifying, ezinye izici ezithinta izinga lokushintsha nobumsulwa nazo kufanele zicatshangelwe, njengobudlelwano besilinganiso phakathi kwe-alkali ne-ejenti e-etherifying, isikhathi se-etherification, okuqukethwe kwamanzi esistimu, izinga lokushisa. , inani le-pH, ukugxila kwesisombululo nosawoti.
Ukuhlaziywa kwezinzuzo kanye nokubi kwe-sodium carboxymethyl cellulose
Ukuthuthukiswa kwe-sodium carboxymethyl cellulose empeleni akukaze kwenzeke.Ikakhulukazi eminyakeni yamuva nje, ukwanda kwezinkambu zokufaka izicelo kanye nokwehliswa kwezindleko zokukhiqiza kwenze ukukhiqizwa kwe-carboxymethyl cellulose kudume kakhulu.Imikhiqizo ethengiswayo ixubile.
Khona-ke, indlela yokunquma ikhwalithi ye-sodium carboxymethyl cellulose, sihlaziya ngemibono ethile yomzimba neyamakhemikhali:
Okokuqala, ingahlukaniswa nokushisa kwayo kwe-carbonization.Ukushisa okujwayelekile kwe-carbonization ye-sodium carboxymethyl cellulose yi-280-300 ° C. Uma i-carbonized ngaphambi kokuba lokhu kushisa kufinyelelwe, khona-ke lo mkhiqizo unezinkinga.(Ngokuvamile i-carbonization isebenzisa isithando somlilo se-muffle)
Okwesibili, ihlukaniswa ngezinga layo lokushisa lokushintsha umbala.Ngokuvamile, i-sodium carboxymethyl cellulose izoshintsha umbala lapho ifinyelela izinga lokushisa elithile.Izinga lokushisa liyi-190-200 ° C.
Okwesithathu, ingabonakala ngokubukeka kwayo.Ukubonakala kwemikhiqizo eminingi kuyimpushana emhlophe, futhi ubukhulu bezinhlayiyana zayo ngokuvamile buyi-100 mesh, futhi amathuba okudlula angama-98.5%.
I-sodium carboxymethyl cellulose iwumkhiqizo we-cellulose osetshenziswa kakhulu futhi unezinhlobonhlobo zezinhlelo zokusebenza, ngakho-ke kungase kube nokulingiswa okuthile emakethe.Ngakho-ke indlela yokubona ukuthi ingabe umkhiqizo odingwa abasebenzisi ingaphumelela ekuhlolweni kokuhlonza okulandelayo.
Khetha u-0.5g we-sodium carboxymethyl cellulose, ongenaso isiqiniseko sokuthi umkhiqizo we-sodium carboxymethylcellulose, uhlakaze ku-50mL wamanzi futhi ugovuze, engeza inani elincane isikhathi ngasinye, ugovuze ku-60 ~ 70 ℃, bese ushisa imizuzu engu-20 yenza isisombululo esifanayo, epholile Ngemva kokutholwa kwe-liquid, ukuhlolwa okulandelayo kwenziwa.
1. Faka amanzi esixazululweni sokuhlola ukuze uhlanjululwe izikhathi ezi-5, engeza u-0.5mL wesisombululo sokuhlola i-chromotropic acid ethonsini eli-1 laso, bese uwushisisa kubhavu wamanzi imizuzu eyi-10 ukuze ubonakale ubomvu-nsomi.
2. Engeza u-10 mL we-acetone ku-5 mL wesisombululo sokuhlola, qhaqhazela futhi uhlanganise kahle ukukhiqiza imvula emhlophe ecwebezelayo.
3. Engeza u-1mL wesixazululo sokuhlola i-ketone sulfate ku-5mL wesisombululo sokuhlola, hlanganisa bese unyakazisa ukuze ukhiqize imvula ecwebezelayo eluhlaza okwesibhakabhaka.
4. Izinsalela ezitholwe ngomlotha walo mkhiqizo zibonisa ukusabela okuvamile kosawoti we-sodium, okungukuthi, i-sodium carboxymethyl cellulose.
Ngalezi zinyathelo, ungakwazi ukubona ukuthi umkhiqizo othengiwe uyi-sodium carboxymethyl cellulose nokuhlanzeka kwawo, okunikeza indlela elula nesebenzayo kubasebenzisi ukukhetha kahle imikhiqizo.
Isikhathi sokuthumela: Nov-12-2022