Kukhuthala kwaHPMChydroxypropyl methyl cellulose, zimapangitsa kuti madzi azigwira bwino ntchito. Kukhuthala ndi chinthu chofunikira kwambiri pakugwira ntchito kwa HPMC. Pakadali pano, opanga osiyanasiyana a HPMC amagwiritsa ntchito njira ndi zida zosiyanasiyana kuti adziwe kukhuthala kwa HPMC. Njira zazikulu ndi Haake Rotovisko, Hoppler, Ubbelohde ndi Brookfield, ndi zina zotero.
Pa chinthu chomwecho, zotsatira za kukhuthala komwe kumayesedwa ndi njira zosiyanasiyana zimakhala zosiyana kwambiri, zina zimakhala zosiyana kwambiri. Chifukwa chake, poyerekeza kukhuthala, ziyenera kuchitika pakati pa njira yoyesera yomweyi, kuphatikizapo kutentha, rotor, ndi zina zotero.
Pa kukula kwa tinthu tating'onoting'ono, tinthu tating'onoting'ono tikakhala tating'onoting'ono, madzi amasungidwa bwino. Tinthu tating'onoting'ono ta cellulose ether tikakumana ndi madzi, pamwamba pake timasungunuka nthawi yomweyo ndikupanga gel kuti tiphimbe zinthuzo kuti mamolekyu amadzi asapitirire kulowa, nthawi zina kusakaniza kwa nthawi yayitali sikungasakanizidwe mofanana, kupangidwa kwa yankho la matope lodzaza kapena agglomerate. Kusungunuka kwa cellulose ether ndi chimodzi mwazinthu zomwe mungasankhe cellulose ether. Kusalala ndi chizindikiro chofunikira cha magwiridwe antchito a methyl cellulose ether. MC ya matope ouma imafuna ufa, madzi ochepa, komanso kusalala kwa 20% ~ 60% tinthu tosakwana 63um. Kusalala kumakhudza kusungunuka kwaHPMChydroxypropyl methyl cellulose ether. MC yolimba nthawi zambiri imakhala ndi tinthu tating'onoting'ono ndipo imatha kusungunuka mosavuta m'madzi popanda kusonkhana, koma liwiro la kusungunuka limakhala lochepa kwambiri, kotero siliyenera kugwiritsidwa ntchito mu matope ouma. Mu matope ouma, MC imafalikira pakati pa zinthu zodzaza bwino, zodzaza bwino ndi zinthu zomangira simenti monga simenti, ndipo ufa wokhawo womwe uli bwino ungapewe kusonkhana kwa methyl cellulose ether ikasakanikirana ndi madzi. MC ikawonjezera madzi kuti isungunuke matope, zimakhala zovuta kwambiri kuwabalalitsa ndikusungunula. MC yokhala ndi ulusi wolimba sikuti imangowononga zinthu zokha, komanso imachepetsa mphamvu ya matope am'deralo. Madzi ouma otere akapangidwa m'dera lalikulu, liwiro la kusungunuka kwa matope ouma am'deralo limachepa kwambiri, zomwe zimapangitsa kuti pakhale ming'alu chifukwa cha nthawi yosiyana yosungunuka. Pa matope opopera ndi makina, chifukwa cha nthawi yochepa yosakaniza, ulusiwo umakhala wokwera.
Kawirikawiri, kukhuthala kwa madzi kukakhala kwakukulu, kumakhala bwino kwambiri. Komabe, kukhuthala kwa madzi kukakhala kwakukulu, kulemera kwa mamolekyulu a MC kumakhala kwakukulu, ndipo magwiridwe antchito a kusungunuka adzachepa mofanana, zomwe zimakhudza mphamvu ndi magwiridwe antchito a matope. Kukhuthala kwa madzi kukakhala kwakukulu, mphamvu ya matope ikakhala yolimba kwambiri, koma sizikugwirizana ndi ubale. Kukhuthala kwa madzi kukakhala kwakukulu, matope onyowa adzakhala omata kwambiri, onse awiri, kapangidwe kake, magwiridwe antchito a sticky scraper komanso kumamatira kwambiri kuzinthu zoyambira. Koma sizothandiza kuwonjezera mphamvu ya matope onyowa. Pakumanga, magwiridwe antchito oletsa kutsika kwa madzi sakuonekera. M'malo mwake, ma ether ena otsika koma osinthidwa a methyl cellulose ali ndi magwiridwe antchito abwino kwambiri pakukweza mphamvu ya matope onyowa.
Pamene ether ya cellulose iwonjezeredwa ku matope, imakhala ndi ntchito yabwino yosungira madzi, ndipo kukhuthala kwa madzi kumakhala kwakukulu, komanso imakhala ndi ntchito yabwino yosungira madzi.
Kusalala kwa HPMC kumakhudzanso kusunga madzi, makamaka, chifukwa cha kukhuthala komweko ndi kusalala kosiyana kwa ether ya methyl cellulose, ngati pali kuchuluka komweko kwa kuwonjezera, kuchepa kwa kusunga madzi kumakhala bwino.
Kusunga madzi kwa HPMC kumagwirizananso ndi kutentha komwe kumagwiritsidwa ntchito, ndipo kusunga madzi kwa methyl cellulose ether kumachepa ndi kukwera kwa kutentha. Koma pogwiritsira ntchito zinthu zenizeni, malo ambiri a matope ouma nthawi zambiri amakhala otentha kwambiri (oposa madigiri 40) pansi pa momwe amamangidwira mu substrate yotentha, monga kusungunuka kwa chilimwe kwa pulasitiki yakunja ya khoma, komwe nthawi zambiri kumathandizira kulimba kwa simenti ndi kuuma kwa matope ouma. Kuchepa kwa kuchuluka kwa madzi komwe kumasunga kumabweretsa kumverera koonekeratu kuti kukana kumangidwa ndi kukana kusweka kumakhudzidwa. Pachifukwa ichi, kuchepetsa mphamvu ya zinthu zotentha kumakhala kofunikira kwambiri. Ngakhale kuti chowonjezera cha methyl hydroxyethyl cellulose ether chimaonedwa kuti chili patsogolo pa chitukuko cha ukadaulo, kudalira kwake kutentha kudzapangitsabe kufooka kwa katundu wa matope ouma. Ngakhale kuchuluka kwa methyl hydroxyethyl cellulose (fomula yachilimwe), kukana kumangidwa ndi kukana kusweka sikungathe kukwaniritsa zosowa zogwiritsidwa ntchito. Kudzera mu chithandizo chapadera cha MC, monga kuwonjezera kuchuluka kwa etherification, mphamvu ya MC yosungira madzi imatha kukhala ndi zotsatira zabwino kutentha kwambiri, kotero kuti ikhoza kupereka magwiridwe antchito abwino m'mikhalidwe yovuta.
Nthawi yotumizira: Meyi-18-2022