Kodi mitundu ya Cellulose ether ndi iti?

Ma cellulose ethers ndi gulu losiyanasiyana la ma polima opangidwa kuchokera ku cellulose, polysaccharide yachilengedwe yomwe imapezeka muzomera. Amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikizapo zomangamanga, mankhwala, zakudya, zodzoladzola, komanso chisamaliro chaumwini, chifukwa cha katundu wawo wapadera komanso kusinthasintha. Nayi mitundu yodziwika bwino ya cellulose ether:

1. Methyl cellulose (MC):
   • Methyl cellulose amapangidwa pochiza cellulose ndi methyl chloride kuyambitsa magulu a methyl pamsana wa cellulose.
   • Imasungunuka m'madzi ozizira ndipo imapanga njira zomveka bwino komanso zowoneka bwino.
   • MC imagwiritsidwa ntchito ngati chokhuthala, chomangira, komanso chokhazikika pamagwiritsidwe osiyanasiyana, kuphatikiza zida zomangira (mwachitsanzo, matope opangidwa ndi simenti, pulasitala wopangidwa ndi gypsum), zakudya, mankhwala, ndi zinthu zosamalira munthu.
2. Ma cellulose a Hydroxyethyl (HEC):
   • Ma cellulose a Hydroxyethyl amapangidwa pochita ma cellulose ndi ethylene oxide kuti apangitse magulu a hydroxyethyl pamsana wa cellulose.
   • Imasungunuka m'madzi ozizira ndipo imapanga mayankho omveka bwino, owoneka bwino okhala ndi zinthu zabwino kwambiri zosungira madzi.
   • HEC imagwiritsidwa ntchito mobwerezabwereza ngati thickener, rheology modifier, ndi mafilimu opanga mafilimu mu utoto, zomatira, mankhwala osamalira anthu, ndi mankhwala.
3. Hydroxypropyl Methyl Cellulose (HPMC):
   • Hydroxypropyl methyl cellulose amapangidwa poyambitsa magulu a hydroxypropyl ndi methyl pamsana wa cellulose.
   • Imawonetsa zinthu zofanana ndi methyl cellulose ndi hydroxyethyl cellulose, kuphatikiza kusungunuka kwamadzi, luso lopanga mafilimu, komanso kusunga madzi.
   • HPMC imagwiritsidwa ntchito kwambiri muzomangamanga (mwachitsanzo, zomatira matailosi, ma renders opangidwa ndi simenti, zodzipangira okha), komanso m'mankhwala, zakudya, ndi zinthu zosamalira munthu.
4. Carboxymethyl cellulose (CMC):
   • Carboxymethyl cellulose amachokera ku cellulose pochiza ndi sodium hydroxide ndi monochloroacetic acid kuti ayambitse magulu a carboxymethyl.
   • Imasungunuka m'madzi ndipo imapanga njira zowoneka bwino, zowoneka bwino komanso zokhuthala bwino, zokhazikika komanso zosunga madzi.
   • CMC imagwiritsidwa ntchito ngati chowonjezera, chomangira, komanso chosinthira rheology muzakudya, mankhwala, nsalu, mapepala, ndi zida zina zomangira.
5. Ethyl Cellulose (EC):
   • Ethyl cellulose amapangidwa pochita cellulose ndi ethyl chloride kuyambitsa magulu a ethyl pamsana wa cellulose.
   • Sisungunuka m'madzi koma sungunuka mu zosungunulira za organic monga ethanol ndi chloroform.
   • EC imagwiritsidwa ntchito ngati chopangira filimu, binder, ndi zokutira mu mankhwala, zakudya, zodzoladzola, ndi mafakitale.

Awa ndi ena mwa mitundu yomwe imagwiritsidwa ntchito kwambiri ya cellulose ether, iliyonse yopereka mawonekedwe apadera komanso maubwino pazogwiritsa ntchito zosiyanasiyana. Ma ether ena apadera a cellulose amathanso kukhalapo, ogwirizana ndi zofunikira m'mafakitale osiyanasiyana.