Njira zosungunula HPMC zikuphatikizapo: njira yothetsera madzi ozizira nthawi yomweyo ndi njira yothetsera madzi otentha, njira yosakanizira ufa ndi njira yonyowetsa zosungunulira zachilengedwe.
Yankho la madzi ozizira la HPMC limachiritsidwa ndi glyoxal, yomwe imafalikira mofulumira m'madzi ozizira. Pakadali pano, si yankho lenileni. Ndi yankho pamene kukhuthala kumawonjezeka. Yankho lotentha silichiritsidwa ndi glyoxal. Pamene kuchuluka kwa glyoxal kuli kwakukulu, kumafalikira mofulumira, koma kukhuthala kumakwera pang'onopang'ono.
Popeza HPMC siisungunuka m'madzi otentha, HPMC imatha kufalikira mofanana m'madzi otentha poyamba, kenako n’kusungunuka mwachangu ikazizira.
Njira ziwiri zodziwika bwino zafotokozedwa pansipa:
1) Ikani madzi otentha okwanira mu chidebecho ndikutenthetsa mpaka madigiri 70 Celsius. Hydroxypropyl methylcellulose inawonjezedwa pang'onopang'ono mukasakaniza pang'onopang'ono, HPMC inayamba kuyandama pamadzi, kenako pang'onopang'ono inapanga slurry, yomwe inaziziritsidwa mukasakaniza.
2) Onjezani 1/3 kapena 2/3 ya madzi ofunikira mu chidebecho, tenthetsani mpaka 70 ℃, falitsani HPMC motsatira njira ya 1) kuti mukonze slurry ya madzi otentha; Kenako onjezerani madzi ozizira otsalawo ku slurry ya madzi otentha, sakanizani ndikuziziritsa chisakanizocho.
HPMC yokhazikika pamadzi ozizira imatha kusungunuka powonjezera madzi mwachindunji, koma nthawi yoyambirira ya kukhuthala ndi mphindi 1 mpaka 15. Nthawi yogwirira ntchito siyenera kupitirira nthawi yoyambira.
Njira yosakanizira ufa: Ufa wa HPMC umasungunuka kwathunthu posakaniza ndi ufa womwewo kapena zingapo, kenako n’kusungunuka ndi madzi. Pankhaniyi, HPMC ikhoza kusungunuka popanda kuikidwa m’mabokosi.
Njira yonyowetsera zinthu zosungunuka zachilengedwe:
Hydroxypropyl methylcellulose imatha kusungunuka poimwaza mu organic solvent kapena kuinyowetsa ndi organic solvent, kenako nkuiwonjezera m'madzi ozizira kapena m'madzi ozizira. Ethanol, ethylene glycol, ndi zina zotero zingagwiritsidwe ntchito ngati organic solvent.
Nthawi yotumizira: Januwale-20-2022