Zomwe zimakhudza kusungidwa kwa madzi kwa hydroxypropyl methylcellulose

Kuchuluka kwa kukhuthala kwa hydroxypropyl methylcellulose, kumapangitsa kuti madzi asungidwe bwino. Viscosity ndi gawo lofunikira pakuchita kwa HPMC. Panopa, opanga osiyana HPMC ntchito njira zosiyanasiyana ndi zida kuyeza mamasukidwe akayendedwe a HPMC. Njira zazikulu ndi Haake Rotovisko, Hoppler, Ubbelohde ndi Brookfield.

Kwa mankhwala omwewo, zotsatira za viscosity zoyesedwa ndi njira zosiyanasiyana zimasiyana kwambiri, ndipo zina zimakhala zosiyana kawiri. Chifukwa chake, poyerekeza ma viscosities, onetsetsani kuti mwachita pakati pa njira zoyesera zomwezo, kuphatikiza kutentha, spindle, etc.

Ponena za kukula kwa tinthu, tinthu tating'onoting'ono tating'onoting'ono, timasunga bwino madzi. Pamene tinthu tating'ono ta cellulose ether takumana ndi madzi, pamwamba pake amasungunuka kuti apange gel osakaniza, omwe amakulunga zinthuzo ndikuletsa kulowa kosalekeza kwa mamolekyu amadzi. . Zimakhudza kwambiri kusungidwa kwa madzi kwa cellulose ether yake, ndipo kusungunuka ndi chimodzi mwazinthu zomwe zimasankha cellulose ether. Fineness ndiyenso chizindikiro chofunikira cha methylcellulose ether. MC yogwiritsidwa ntchito mumatope owuma imayenera kukhala yaufa, yokhala ndi chinyezi chochepa, ndipo fineness imafunikanso 20% mpaka 60% ya kukula kwa tinthu kukhala osachepera 63um. Fineness imakhudza kusungunuka kwa hydroxypropyl methylcellulose ether. Coarse MC nthawi zambiri imakhala granular ndipo imasungunuka mosavuta m'madzi popanda kuyika, koma kusungunuka kumakhala pang'onopang'ono, kotero sikoyenera kugwiritsidwa ntchito mumatope owuma. Mumatope owuma, MC imamwazikana muzinthu za simenti monga zophatikiza, zodzaza bwino ndi simenti. Ma ufa okhawo omwe ali abwino mokwanira angateteze methylcellulose ether kuti asagwe akasakanikirana ndi madzi. MC ikawonjezera madzi kuti isungunuke zophatikiza, zimakhala zovuta kumwaza ndikusungunula. MC yokhala ndi coarser fineness sikuti imangoyambitsa zinyalala, komanso imachepetsa mphamvu yam'deralo ya matope. Mtundu uwu wa matope owuma ukamangidwa pamtunda waukulu, kuthamanga kwa matope owuma kumaloko kumachepetsedwa kwambiri, ndipo kusweka kumachitika chifukwa cha nthawi zosiyanasiyana zochiritsa. Kuti mugwiritse ntchito matope opopera pogwiritsa ntchito makina opangira makina, kuwongolera kwapamwamba kumafunika chifukwa chanthawi yochepa yosakaniza.

Nthawi zambiri, kukwezeka kwa mamachulukidwe kumapangitsa kuti madzi asungidwe bwino. Komabe, kukwezeka kwa mamasukidwe amphamvu ndi kulemera kwa maselo a MC, kuchepa kofananirako kusungunuka, komwe kumakhudzanso mphamvu ndi ntchito yomanga matope. Kuchuluka kwa mamasukidwe akayendedwe, m'pamenenso kuwonjezereka kwa matope kumawonekera, koma sikuli kofanana. Kuchuluka kwa mamachulukidwe ake kumapangitsa kuti dothi lonyowa likhale lolimba. Idzamamatira ku scraper panthawi yomanga ndipo imakhala yomatira kwambiri ku gawo lapansi. Koma sizimachita pang'ono kuwonjezera mphamvu zamapangidwe a dothi lonyowa lokha. Panthawi yomanga, ntchito yotsutsana ndi sag sinawonekere. Mosiyana ndi izi, ma ethers ena otsika kwambiri koma osinthidwa a methylcellulose ali ndi zinthu zabwino kwambiri pakuwongolera mphamvu zamapangidwe amatope onyowa.

Kuchuluka kwa cellulose ether kuwonjezeredwa mumatope, kumapangitsa kuti madzi asamasungidwe bwino, komanso kukwezeka kwa viscosity, ndi bwino kusunga madzi.

Ubwino wa HPMC umakhudzanso kusungidwa kwa madzi. Nthawi zambiri, ma etha a methyl cellulose okhala ndi kukhuthala kofanana koma fineness yosiyana, pamene kuchuluka kwake kuli kofanana, kukongola kwabwinoko, kumapangitsa kuti madzi asungidwe bwino.

Kusungidwa kwa madzi kwa HPMC kumagwirizananso ndi kutentha kwa ntchito. Kusungidwa kwa madzi kwa methylcellulose ether kumachepa pamene kutentha kumawonjezeka. Komabe, muzinthu zenizeni, matope owuma nthawi zambiri amamangidwa pazigawo zotentha zotentha (pamwamba pa madigiri 40) m'malo ambiri, monga kupaka pulasitala pamakoma akunja kunja kwadzuwa, komwe nthawi zambiri kumathandizira kulimba kwa simenti ndi kusinthika kwamitundu. simenti. kuumitsa. Mtondo wouma. Kuchepa kwa kusungidwa kwa madzi kumawonetseratu kuti kugwira ntchito ndi kukana ming'alu kudzakhudzidwa, ndipo ndizofunikira kwambiri kuchepetsa mphamvu ya kutentha pansi pazimenezi. Ngakhale zowonjezera za methylhydroxyethylcellulose ether pakali pano zimaganiziridwa kukhala patsogolo pa chitukuko chaukadaulo, kudalira kwawo kutentha kungapangitsebe kufowoka kwa matope owuma. Ngakhale kuti mlingo wa methylhydroxyethylcellulose (chilinganizo cha Xia) udawonjezedwa, kutheka kwake komanso kukana kwa ming'alu sikunakwaniritsidwebe zofunikira zogwiritsidwa ntchito. Kupyolera mu mankhwala ena apadera, monga kuonjezera mlingo wa etherification, ndi zina zotero, MC imatha kusunga madzi abwino pa kutentha kwakukulu, potero kumapereka ntchito yabwino pansi pa zovuta.