Kushishino lokwakha, i-HPMC isoloko ifakwa emanzini angathathi hlangothi, kwaye imveliso ye-HPMC inyibilika yodwa ukuze igwebe izinga lokuchithwa.
Emva kokufakwa kumanzi angathathi hlangothi yedwa, imveliso edibanisa ngokukhawuleza ngaphandle kokusabalalisa imveliso ngaphandle kokunyanga kwendawo;emva kokufakwa kumanzi angathathi hlangothi yedwa, imveliso enokuthi isasazeke kwaye ingadibanisi kunye yimveliso enonyango olungaphezulu.
Xa imveliso ye-HPMC engaphathwanga inyibilika yodwa, i-particle yayo enye iyancibilika ngokukhawuleza kwaye yenza ifilimu ngokukhawuleza, okwenza kube nzima ukuba amanzi angene kwamanye amasuntswana, okukhokelela kwi-agglomeration kunye ne-agglomeration.Ibizwa ngokuba yimveliso ekhawulezileyo kwimarike ngoku.Iimpawu ze-HPMC ezingaphathwanga zezi: amasuntswana azimeleyo anyibilika ngokukhawuleza kwiindawo ezingathathi hlangothi, ezine-alkaline, kunye ne-acidic, kodwa azikwazi ukusasaza phakathi kwamasuntswana kulwelo, okukhokelela kwi-agglomeration kunye ne-clustering.Ekusebenzeni okwenyani, emva kokusasazeka ngokomzimba kolu luhlu lweemveliso kunye namasuntswana aqinileyo afana nomgubo werabha, isamente, isanti, njl.Xa kuyimfuneko ukunyibilikisa iimveliso HPMC ngokwahlukeneyo, olu luhlu iimveliso kufuneka isetyenziswe ngononophelo, kuba iya agglomerate kwaye enze amaqhuma.Ukuba kuyimfuneko ukutshabalalisa imveliso ye-HPMC engaphathwanga ngokwahlukileyo, kufuneka ihlakazwe ngokufanayo kunye ne-95 ° C yamanzi ashushu, kwaye ipholile ukuze inyibilike.
Amasuntswana emveliso ye-HPMC aphathwe ngomphezulu, emanzini angathathi hlangothi, amasuntswana azimeleyo angasasazwa ngaphandle kwe-agglomeration, kodwa awayi kuvelisa ngoko nangoko i-viscosity.Emva kokucwina ixesha elithile, ulwakhiwo lwekhemikhali yonyango lomphezulu luyatshatyalaliswa, kwaye amanzi anokunyibilikisa amasuntswana eHPMC.Ngeli xesha, amasuntswana emveliso asasazeke ngokupheleleyo kwaye afunxa amanzi aneleyo, ngoko ke imveliso ayiyi kudibanisa okanye idibanise emva kokuchithwa.Isantya sokusasazwa kunye nesantya sokuchithwa sixhomekeke kwiqondo lonyango lomphezulu.Ukuba unyango lomphezulu luncinci, isantya sokusasazeka siyacotha kwaye isantya sokuncamathela sikhawuleza;ngelixa imveliso enonyango olunzulu lomphezulu inesantya esikhawulezayo sokusasazeka kunye nesantya sokuncamathela esicothayo.Ukuba ufuna ukwenza olu luhlu lweemveliso zinyibilike ngokukhawuleza kule meko, unokulahla inani elincinci lezinto zealkaline xa zinyibilika zodwa.Imarike yangoku idla ngokubizwa ngokuba ziimveliso ezinyibilikayo kancinane.Iimpawu zeemveliso ze-HPMC eziphathwe ngomphezulu zezi: kwisisombululo esinamanzi, amasuntswana anokuthi ahlakazeke omnye komnye, anganyibilika ngokukhawuleza kwimo ye-alkaline, kwaye anyibilike ngokukhawuleza kwimeko engathathi hlangothi kunye ne-acidic.
Kumsebenzi wokwenene wemveliso, olu luhlu lweemveliso luhlala lunyibilika emva kokuba luhlakazwe kunye nezinye izinto eziqinileyo phantsi kweemeko ze-alkaline, kwaye izinga lokuchithwa kwayo alifani naleyo yeemveliso ezingaphendulwanga.Ikwafanelekile ukusetyenziswa kwiimveliso ezichithwe zodwa, ngaphandle kwe-caking okanye izibonda.Imodeli ethile yemveliso inokukhethwa ngokwezinga lokuchithwa elifunekayo kulwakhiwo.
Ngexesha lenkqubo yokwakha, nokuba i-samente yodaka okanye i-slurry esekelwe kwi-gypsum, uninzi lwazo ziinkqubo ze-alkaline, kwaye inani le-HPMC elongezelelweyo lincinci kakhulu, elinokuthi lihlakazwe ngokulinganayo phakathi kwezi ntwana.Xa amanzi esongezwa, i-HPMC iya kunyibilika ngokukhawuleza.Kuphela i-hydroxypropyl methylcellulose yokwenene inokumelana novavanyo lwamaxesha amane: inkqubo yokusabela ilawulwa ngokuchanekileyo ukuvelisa i-HPMC, kwaye ukutshintshwa kwayo kugqityiwe kwaye ukufana kuhle kakhulu.Isisombululo sayo samanzi sicacile kwaye sicacile, kunye neentsinga ezimbalwa zamahhala.Ukuhambelana kunye ne-rubber powder, i-samente, i-lime kunye nezinye izinto eziphambili zomelele ngokukodwa, ezinokwenza izinto eziphambili zidlale ukusebenza kakuhle.Nangona kunjalo, i-HPMC ene-reaction engalunganga ineentsinga ezininzi zasimahla, ukuhanjiswa okungalinganiyo kwezinto ezibambeleyo, ukugcinwa kwamanzi okulambathayo kunye nezinye iipropathi, okukhokelela kwisixa esikhulu somphunga wamanzi kwimozulu ephezulu yobushushu.Nangona kunjalo, okubizwa ngokuba yi-HPMC kunye nenani elikhulu lezongezo kunzima ukulungelelanisa kunye nomnye, ngoko ukusebenza kokugcinwa kwamanzi kubi nakakhulu.Xa kusetyenziswa i-HPMC ekumgangatho ophantsi, iingxaki ezinjengokuqina kodaka oluphantsi, ixesha elifutshane lokuvula, umgubo, ukuqhekeka, ukugoba kunye nokuchithwa kuya kubangelwa, okuya kwandisa ubunzima bokwakha kunye nokunciphisa kakhulu umgangatho wesakhiwo.Okufanayo yi-cellulose ether, ingaba neziphumo ezihluke ngokupheleleyo.
Ixesha lokuposa: Mar-29-2023