HPMC (hydroxypypyl methylcellulose) ndi zolemba zomwe zimagwiritsidwa ntchito pomanga, mankhwala, chakudya, mankhwala tsiku lililonse. Malinga ndi kusungunulera kwake m'madzi, imatha kugawidwa m'madzi ozizira amtundu wambiri ndi mtundu wosungunuka. Pali zosiyana kwambiri pakupanga mitundu iwiri iyi ya HPMC.
(1), kukonza zinthu
1. Mtundu wamadzi ozizira
Pakupanga kwa madzi ozizira hpmc, zopangira ziweto zimafunikira kukongola. Zida zomera nthawi zambiri zimaphatikizapo ma cellulose, ma prothal, ma propyl oxide, etc. zida zopangira zimayenera kuphwanyidwa bwino ndikuwonetsetsa kuti mwachita chitsime ndi chochuluka cha zomwe adachita. Makamaka, chithandizo cha cellulose pamafunika kuyanika komanso kuwononga kukwaniritsa gawo labwino kwambiri.
2. Mtundu wosungunuka
Hot-Sungunulani HPMC ndi yofanana ndi madzi ozizira pompopompo za raw, koma ali ndi zofunikira kwambiri pakukonzekera kwa cellulose. Chifukwa chakuti Hot-Sungunulani HPMC imachita kutentha kwambiri, kuyera ndi tinthu kukula kwa cellulose kumakhudza kwambiri machitidwe. Nthawi zambiri zimakhala zofunikira kugwiritsa ntchito cellose yapamwamba kwambiri, ndipo kukula kwa tinthu iyenera kulamulidwa mosamalitsa pakuwononga.
(2), synthesis achita
1. Mtundu wamadzi ozizira
Kuphatikizika kwa madzi ozizira hpmc nthawi zambiri kumachitika kutentha kochepa, kumawongoleredwa pa 20-50 dispas Celsius. Pakachitika, cellulose imapangidwa koyamba pansi pa miyambo ya alkalines kuti ikhale ndi maunyolo a cellulose ndikupanga magulu a hydroxyl. Kenako, monga methanol, ma propyle oxide ndi methyl chloride amawonjezeredwa pansi posintha kuti apititse patsogolo. Njira yonse yomwe imafunikira kuti muchepetse kutentha kwa kutentha komanso ph onetsetsani kuti pali kufanana komanso kukhazikika kwa malonda.
2. Mtundu wosungunuka
Kuphatikizika kwa Hot-Sungunulani HPMC kumachitika kutentha kwambiri, nthawi zambiri 50-80 digiri Celsius kapena kuposa. Njira yochitira ndi yofanana ndi madzi ozizira amtunduwu, koma chifukwa cha kuchuluka kwazomwe zimachitika kutentha kwambiri, kuwotcha kokhazikika komanso nthawi yokhazikika komanso nthawi yoyeserera imafunikira. Pa kutentha kwambiri, hydrolysis ndi zolimbitsa thupi za cellulose ndizathunthu, ndipo kugawa kochepetsa kwazinthuzo ndi yunifolomu yambiri.
(3) Njira Yokonzekera
1. Mtundu wamadzi ozizira
Pambuyo pa kuphatikiza kwa madzi ozizira hpmc yatsirizidwa, njira zingapo zosinthira post-proces zimafunikira. Choyamba ndi cholowerera chochita kuti athetse zinthu za alkalines mu zomwe mukuchita. Kusamba ndi kutsuka kumachitika kuti muchotse zida zosakwanira komanso zopangidwa ndi zinthu. Gawo lomaliza likuyanika ndikusintha. Chogulitsacho chimawuma kuti chizichotse chinyontho, kenako ndikupukutira kwa tinthu tating'onoting'ono kuti tipeze gawo labwino la HPMC.
2. Mtundu wosungunuka
Njira yothandizira kutentha kwa HPMC imakhala yofanana ndi ya HPMC yozizira nthawi yomweyo. Komabe, chifukwa cha kutentha kwambiri komwe kumagwiritsidwa ntchito pochita, chinyezi chazomwe chimapangidwa ndi chotsika mtengo komanso chouma chili chophweka. Kuphatikiza apo, Hot-Sungunulani HPMC imayenera kulipira kwambiri kuti azitha kutentha pang'ono popewa kuwonongeka kwa magwiridwe antchito chifukwa cha kutentha kwambiri.
(4), magwiridwe antchito ndi ntchito
Madzi ozizira hpmc amagwiritsidwa ntchito kwambiri m'minda yomwe imafuna kupanga mafilimu kapena kukula, monga zomangirira zomangamanga, emulsions, etc. Chifukwa cha kusungunuka kwake kwa madzi ozizira. Zofunikira zake zopanga ndizokwera kwambiri, makamaka kuyendetsa komwe kumachitika pamadzi otsika.
Hot-sett hpmc ndioyenera kwambiri kugwiritsa ntchito kutentha kwambiri, monga mata tike omatira, putty ufa, ufa waufa, etc., chifukwa cha kusungunuka kwabwino kwambiri m'madzi otentha. Njira zake zopanga ndizosavuta, koma zimakhala ndi zofunikira kwambiri pa chiyero cha ziweto komanso kutentha kutentha.
Kusiyanitsa kwakukulu pakupanga kwa mapangidwe ozizira-ozizira ndi otentha hpmc ndi njira yosinthira kusiyana kwazinthu zopangira, kuphatikiza njira ndi njira yothandizira pambuyo pake. Mndandanda wamadzi ozizira umafunika kubwereza kutentha kochepa ndipo ali ndi zofunikira kwambiri pakuwongolera ndi mtundu wosungunuka, pomwe mtundu wosungunuka umagwira bwino kwambiri komanso kutentha kwa kutetenthetsera kutentha. Awiriwo ndi osiyananso ndi magawo omwe afunsidwa, ndipo aliyense amachita mbali yofunika.
Post Nthawi: Feb-17-2025