Muaj coob tus neeg tsis paub qhov txawv ntawm hydroxyethyl cellulose thiab ethyl cellulose. Hydroxyethyl cellulose thiab ethyl cellulose yog ob yam khoom sib txawv. Lawv muaj cov yam ntxwv hauv qab no.
1 Hydroxyethyl cellulose:
Ua ib qho surfactant uas tsis yog ionic, ntxiv rau qhov ua kom tuab, ncua, khi, flotation, zaj duab xis-tsim, faib tawm, khaws cia dej thiab muab cov colloids tiv thaiv, nws kuj muaj cov khoom hauv qab no:
1. HEC yaj tau hauv dej kub lossis dej txias, thiab tsis ua rau kub lossis npau, ua rau nws muaj ntau yam solubility thiab viscosity yam ntxwv, thiab tsis yog thermal gelation;
2. Nws yog non-ionic thiab tuaj yeem nyob ua ke nrog ntau yam lwm yam dej-soluble polymers, surfactants thiab ntsev, thiab yog ib qho zoo heev colloidal thickener uas muaj cov tshuaj electrolyte siab concentration;
3. Lub peev xwm khaws dej tau ob npaug ntawm methyl cellulose, thiab nws muaj kev tswj hwm dej zoo dua.
4. Piv nrog rau cov methyl cellulose thiab hydroxypropyl methyl cellulose uas tau lees paub, lub peev xwm ntawm HEC yog qhov phem tshaj plaws, tab sis cov colloid tiv thaiv muaj peev xwm muaj zog tshaj plaws.
2 Ethyl cellulose
Nws yog ib qho non-ionic cellulose ether uas tsis yaj hauv dej tab sis yaj hauv cov organic solvents. Nws muaj cov yam ntxwv hauv qab no:
1. Tsis yooj yim hlawv.
2. Kev ruaj khov zoo thiab thermoplasticity zoo heev.
3. Tsis muaj xim hloov pauv rau lub hnub ci.
4. Kev ywj pheej zoo.
5. Cov khoom siv dielectric zoo.
6. Nws muaj kev tiv thaiv alkali zoo heev thiab tsis muaj zog acid.
7. Kev ua tau zoo tiv thaiv kev laus.
8. Zoo tiv taus ntsev, txias thiab noo noo nqus tau.
9. Ruaj khov rau cov tshuaj lom neeg, khaws cia ntev yam tsis muaj kev puas tsuaj.
10. Sib xws nrog ntau cov resins thiab sib xws zoo nrog txhua tus plasticizers.
11. Nws yooj yim hloov xim nyob rau hauv qhov chaw muaj zog alkaline thiab cua sov.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-15-2022