Hydroxypropyl methyl cellulose (HPMC), zopangiracellulose, akhoza kukhala thonje woyengedwa kapena zamkati zamatabwa. M`pofunika pulverize izo pamaso kapena pa ndondomeko alkalization. The pulverization ikuchitika ndi mphamvu mawotchi. Kuwononga kaphatikizidwe kaphatikizidwe ka cellulose zopangira kuti muchepetse crystallinity ndi polymerization digiri ndikuwonjezera malo ake, potero kuwongolera kupezeka ndi luso lamankhwala la reagents kumagulu atatu a hydroxyl pa cellulose macromolecular glucose mphete m'munsi.
Hydroxypropyl methyl cellulose (HPMC)amagwiritsidwa ntchito ngati gawo lapansi lopangira mafuta, omwe amatha kuzindikira kugwiritsa ntchito shuga wathunthu, kuwongolera kagwiritsidwe ntchito kazinthu zopangira, kuchepetsa gawo lotsalira la gawo lapansi mumtsuko wowotchera, ndikuchepetsa mtengo wakuthira madzi oyipa. Makhalidwe amethyl celluloseamathandizira kukhathamiritsa kwa mtanda, kudyetsedwa-mtanda ndi njira zowotchera mosalekeza, kupewa zovuta zingapo monga kuwongolera kapangidwe ka sing'anga ndi kuchuluka kwa dilution; nthawi yomweyo, zimathandizanso kuwongolera njira yowotchera. Chifukwa katundu wahydroxypropyl methyl cellulose (HPMC)ndizofanana ndi ma ether ena osungunuka m'madzi, amatha kugwiritsidwa ntchito ngati chopangira filimu, thickener, emulsifier ndi stabilizer mu zokutira za latex ndi zigawo zosungunula zamadzi zosungunuka za utomoni, zomwe zimapangitsa kuti zikhale zotheka kupanga zokutira Firimuyi ili ndi kukana kwabwino kwa abrasion, kusanja. katundu ndi zomatira, ndipo zasintha kusamvana pamwamba, kukhazikika kwa asidi ndi zamchere, komanso kugwirizana ndi utoto wazitsulo.
Hydroxypropyl methyl cellulose (HPMC)ali ndi zotsatira zabwino ngati thickener kwa zokutira woyera polyvinyl acetate madzi. Mlingo wolowa m'malo wacellulose etherkumawonjezeka, ndipo kukana kwa mabakiteriya ndi kukokoloka kumawonjezekanso.
Ngakhale mfundo ya etherification kaphatikizidwe wa hydroxypropyl methylcellulose (HPMC) sizovuta, ndi alkalization, kuphwanya zopangira, ndi alkalization. Madera osiyanasiyana a etherification, zosungunulira zosungunulira, kulekanitsa centrifugal, kutsuka ndi kuyanika kumaphatikizapo matekinoloje ambiri ofunikira komanso chidziwitso chochuluka.
Kwa mitundu yosiyanasiyana yazinthu, chilengedwe chilichonse chimakhala ndi zowongolera zaposachedwa, monga kutentha, nthawi, kupanikizika komanso kuwongolera kwazinthu. Zida zothandizira ndi zida zowongolera ndi chitsimikizo chodalirika komanso chopindulitsa cha khalidwe lokhazikika la mankhwala ndi dongosolo lodalirika la kupanga.
Mankhwala makhalidwe ahydroxypropyl methyl cellulose:
1. Katundu: Mankhwalawa ndi ufa woyera, ndipo alibe fungo, alibe kukoma komanso alibe poizoni.
2. Mphamvu yosungira madzi: Chifukwa mankhwalawa amatha kuyamwa madzi olemera kangapo kuposa okha. Sungani madzi ochuluka mumatope, gypsum, utoto ndi zinthu zina.
3. Mankhwalawa amatha kusungunuka m'madzi ozizira kuti apange chosungunulira cha viscous chowonekera.
4. Kusungunuka mu zosungunulira za organic: Chifukwa zimakhala ndi majini ena a hydrophobic, mankhwalawa amatha kusungunuka muzitsulo zina za organic, komanso amatha kusungunuka m'madzi osakanikirana a madzi ndi zinthu zamoyo.
5. Kukaniza mchere: Popeza mankhwalawa ndi osakhala aionic komanso osakhala polyelectrolyte, amakhala okhazikika muzitsulo zamadzimadzi zamchere zamchere kapena organic electrolytes. Pankhani ya electrolyte kwambiri, imatha kuyambitsa gelation kapena mpweya.
6. Zochita zapamtunda: Madzi amadzimadzi a mankhwalawa amakhala ndi zochitika zapamtunda.
Nthawi yotumiza: Nov-29-2021
