01. Kusiyana pakati pa hydroxypropyl methyl yabodza ndi hydroxypropyl methyl yapamwamba kwambiri
Mawonekedwe: Wowuma woyera HPCM imawoneka yofanana kwambiri, pakati pa 0.3 ndi 0.4 g/ml. Amylum imalumikizana ndi wowuma kotero HPCM ndi yamadzimadzi ndipo siimakhala ndi nkhawa kwambiri poyerekeza ndi mankhwala oyeretsera poizoni wamba.
Mikhalidwe: sitachi yodzaza ndi sitachi, ufa wa hpm, ulusi pansi pa maikulosikopu kapena galasi lokulitsa, HPCM mtundu wa sitachi womwe ungalamulire sitachi kapena sitachi ndi lentils.
Fungo: Hydroxypropyl methylcellulose yoyera HPMC siingathe kununkhiza ammonia, starch ndi mowa; HPMC yosakanikirana imatha kununkhiza fungo la mitundu yonse, ngakhale itakhala yopanda kukoma, imamva ngati yofooka Shen.
Yankho lamadzi: yankho lamadzi loyera, la HPMC methylcellulose demethoxypropyl brinzolamide ndi loyera, kuchuluka kwa madzi osungidwa bwino ≥ 97%; cellulose yochepetsedwa hydrolyzed cellulose-diluted HPMC hydrolyzed cellulose ndi yokhuthala kwambiri, kuchuluka kwa madzi osungidwa kumakhala kochepa kufika pa 80%.
02. Kusungidwa kwa methyl cellulose pa kutentha kwakukulu ndi chizindikiro chofunikira chodziwira mtundu wa methyl cellulose ether. Zinthu monga kutentha kwa mpweya, kutentha kwa mpweya ndi liwiro la mphepo zimakhudza kusinthasintha kwa simenti ndi zinthu zopangidwa ndi gypsum. Chifukwa chake, kuwonjezera kuchuluka komweko kwa zinthu za HPMC m'nyengo zosiyanasiyana, pali kusiyana kwina pakugwiritsa ntchito bwino madzi. Mu njira yeniyeni yogwirira ntchito, zotsatira za serosa yonyowetsa zitha kukonzedwa pochepetsa kuchuluka kwa HPMC yomwe yawonjezeredwa. HPMC yapamwamba kwambiri imatha kuthetsa vuto la kusunga madzi kutentha kwambiri.
Methyl cellulose yapamwamba kwambiri imatha kugawidwa mofanana komanso moyenera mu simenti ndi zinthu zopangira pulasitala, ndikupanga filimu yolimba, yomwe imatulutsidwa pang'onopang'ono kuchokera pansi ndikupanga hydrophilic reaction yokhala ndi zinthu zosapanga dzimbiri, motero kuonetsetsa kuti imakhala yolimba komanso yofanana. HPMC cellulose methyl propoxylate ndi yabwino komanso yofanana, ndipo mpweya wa ethyl bromide ndi magulu a propionic acid omwe ali mu unyolo wa cellulose ndi wofanana, zomwe zimapangitsa kuti okosijeni ndi hydrogen zigwirizane bwino ndi atomu iliyonse yofunika ya hydroxyl ndi ether. Madzi otsika amatha kusintha madzi omasuka kukhala madzi osunga chikopa, motero amawongolera bwino kuuluka kwa madzi, kupanga kutentha, ndi chinyezi chambiri chochokera m'madzi.
Chifukwa cha kutentha kwambiri komwe kumapangidwa m'chilimwe, kuti tikwaniritse zotsatira za kusunga madzi, ndikofunikira kuwonjezera zinthu zapamwamba za HPMC motsatira njira yofotokozera, apo ayi zingayambitse mavuto monga kuumitsa kwambiri, mphamvu yochepa, ming'alu, kugwedezeka kosagwira ntchito komanso kusiya ntchito, ndikuwonjezera zovuta za ntchito yomanga. Pamene mukuchepetsa kutentha, n'zotheka kuchepetsa pang'onopang'ono kuchuluka kwa HPMC komwe kumawonjezeredwa ndikupeza zotsatira zomwezo zosunga madzi.
Nthawi yotumizira: Epulo-21-2023