Kodi ma cellulose ethers ndi chiyani

Ma cellulose ethers ndi gulu la mankhwala opangidwa kuchokera ku cellulose, polima wachilengedwe wopezeka m'makoma a cell a zomera. Zotengerazi zimapangidwa kudzera mukusintha kwamankhwala kwa ma cellulose kuti ayambitse magulu osiyanasiyana ogwira ntchito, zomwe zimapangitsa kuti pakhale mitundu yosiyanasiyana yazinthu ndi ntchito. Ma cellulose ethers amagwiritsidwa ntchito kwambiri m'mafakitale monga zomangamanga, zamankhwala, chakudya, zodzoladzola, komanso chisamaliro chamunthu chifukwa cha kusinthasintha kwawo komanso zopindulitsa. Nayi mitundu yodziwika bwino ya ma cellulose ethers ndi ntchito zawo:

1. Methyl cellulose (MC):
   • Methyl cellulose amapangidwa pochiza cellulose ndi methyl chloride.
   • Imasungunuka m'madzi ndipo imapanga njira zomveka bwino komanso zowoneka bwino.
   • MC imagwiritsidwa ntchito ngati chokhuthala, chomangira, ndi chokhazikika muzomangira (mwachitsanzo, matope opangidwa ndi simenti, ma pulasitala opangidwa ndi gypsum), zakudya, mankhwala, ndi zinthu zosamalira munthu.
2. Ma cellulose a Hydroxyethyl (HEC):
   • Ma cellulose a Hydroxyethyl amapangidwa pochita cellulose ndi ethylene oxide kuyambitsa magulu a hydroxyethyl.
   • Imasungunuka m'madzi 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.

Awa ndi ena mwa ma cellulose ether omwe amagwiritsidwa ntchito kwambiri, iliyonse ili ndi mawonekedwe apadera komanso ntchito m'mafakitale osiyanasiyana. Ma ether ena apadera a cellulose amathanso kukhalapo, ogwirizana ndi zofunikira pazantchito zosiyanasiyana.