Hydroxypropyl methylcellulose (HPMC) ndi polima wosunthika wopangidwa kuchokera ku cellulose, polysaccharide yopezeka mwachilengedwe yomwe imapezeka m'makoma a zomera. Amagwiritsidwa ntchito m'mafakitale osiyanasiyana monga mankhwala, zakudya, zodzoladzola, zomangamanga, ndi zina zambiri chifukwa chapadera.
HPMC imapangidwa ndi kusintha kwa cellulose kudzera muzochita za etherification. Makamaka, amapangidwa pochiza mapadi ndi kuphatikiza kwa propylene oxide ndi methyl chloride kuyambitsa magulu a hydroxypropyl ndi methyl pamsana wa cellulose. Izi zimabweretsa polima wosungunuka m'madzi wokhala ndi zinthu zabwino poyerekeza ndi cellulose wamba.
Ndondomeko Yopanga:
Kupanga kwa HPMC kumaphatikizapo njira zingapo:
Kupeza Ma cellulose: Ma cellulose, omwe amapangidwa kuchokera ku zamkati kapena thonje, amakhala ngati poyambira.
Etherification: Cellulose imalowa etherification, pomwe imakhudzidwa ndi propylene oxide ndi methyl chloride pansi pamikhalidwe yoyendetsedwa kuti iwonetse magulu a hydroxypropyl ndi methyl.
Kuyeretsedwa: Chotsatiracho chimadutsa njira zoyeretsera kuchotsa zonyansa ndi zosafunika.
Kuyanika ndi Kugaya: HPMC yoyeretsedwayo imawumitsidwa ndikugayidwa kukhala ufa wabwino kapena ma granules, kutengera ntchito yomwe mukufuna.
HPMC ili ndi katundu wambiri, ndikupangitsa kuti ikhale yoyenera ntchito zosiyanasiyana:
Kusungunuka kwamadzi: HPMC imasungunuka m'madzi ozizira, kupanga mayankho omveka bwino, owoneka bwino. Kusungunuka kumatha kusinthidwa posintha kuchuluka kwa m'malo (DS) kwamagulu a hydroxypropyl ndi methyl.
Kupanga Mafilimu: Itha kupanga makanema osinthika komanso ogwirizana akauma, ndikupangitsa kuti ikhale yoyenera kupaka ntchito m'mafakitale amankhwala ndi zakudya.
Thickening: HPMC ndi ogwira thickening wothandizira, kupereka mamasukidwe akayendedwe kulamulira zosiyanasiyana formulations monga lotions, zonona, ndi utoto.
Kukhazikika: Imawonetsa kukhazikika kwamankhwala komanso kukana kuwonongeka kwa tizilombo.
ngakhale: HPMC n'zogwirizana ndi osiyanasiyana zosakaniza zina, kuphatikizapo surfactants, mchere, ndi preservatives.
HPMC imapeza ntchito zambiri m'mafakitale osiyanasiyana:
Mankhwala: Nthawi zambiri amagwiritsidwa ntchito ngati chomangira, chotchingira filimu, chosinthira mamasukidwe, komanso matrix otulutsa mosalekeza pamapangidwe a piritsi.
Makampani a Chakudya: HPMC imagwira ntchito ngati thickener, stabilizer, ndi emulsifier muzakudya monga sosi, mavalidwe, ndi zokometsera.
Zomangamanga: M'makampani omanga, HPMC imagwiritsidwa ntchito ngati chowonjezera pazinthu zopangira simenti, kuwongolera magwiridwe antchito komanso kumamatira.
Zopangira Zosamalira Munthu: Zimapezeka mu zodzoladzola, ma shampoos, ndi mankhwala otsukira mano monga chowonjezera, emulsifier, ndi filimu yakale.
Utoto ndi Zopaka: HPMC imapangitsa kuti penti ndi zokutira zisinthe, kupititsa patsogolo kagwiritsidwe ntchito kake.
HPMC, yochokera ku cellulose kudzera mu etherification reaction, ndi polima wosunthika wokhala ndi ntchito zosiyanasiyana m'mafakitale osiyanasiyana. Makhalidwe ake apadera, monga kusungunuka kwamadzi, luso lopanga mafilimu, ndi kukhuthala, zimapangitsa kuti zikhale zofunikira kwambiri pazamankhwala, chakudya, zomangamanga, ndi zinthu zosamalira anthu.
Nthawi yotumiza: Apr-17-2024