IHydroxypropyl methylcellulose (HPMC) odakeni lwengxube emanzi

Indima yeI-HPMC odakeni oluxubile olumanzi

Udaka oluxubene olumanzi usimende, isamba esihle, ingxube, amanzi nezinye izingxenye ezihlukahlukene ezinqunywa ngokuvumelana nokusebenza. Ngokwesilinganiso esithile, ngemva kokulinganiswa nokuxuba esiteshini sokuxuba, sithuthelwa endaweni yokusetshenziswa iloli le-mixer, futhi sifakwe endaweni ekhethekile Ukuxuba okumanzi kugcinwa esitsheni futhi kusetshenziswe phakathi nesikhathi esibekiwe.

I-Hydroxypropyl methylcellulose isetshenziswa njenge-ejenti evikelayo ye-slurry kasimende nanjenge-retarder ukwenza udaka lumpompe. Ikhono lokuswakama le-Hydroxypropyl-Methyl Cellulose HPMC Cellulose njengekhambi le-viscous linyusa ukusebenza kwe-dab futhi andisa isikhathi sokusebenza. Lokhu kuvumela i-sesame ukuthi ingaqhekeki ngokushesha ngemuva kokugcotshwa futhi ikhulise amandla ngemuva kokoma. . I-Hydrochloric acid iwukusebenza okubalulekile kwe-HPMC ukwenza i-hydrolyze cellulose, futhi ingumkhiqizi wama-pulps amaningi e-China. Izinto ezithinta i-slurry emanzi zifaka inani elingeziwe le-HPMC, i-viscosity ye-HPMC, ubuhle bezinhlayiyana kanye nezinga lokushisa elizungezile.

Indima ebalulekile ye-HPMC ekuxubeni okumanzi ibonakala ngokuyinhloko ezicini ezintathu: eyodwa iwumthamo omuhle wokugcina amanzi, enye ithonya ekuguquguqukeni nasekuguqukeni kwezinzwa zengxube emanzi, kanti enye iwukuxhumana nosimende. Inani le-cellulose ether lincike ekuthathweni kwamanzi yi-substrate, ukwakheka kwesihlabathi, ukushuba kongqimba, isidingo samanzi esixazululweni, kanye nesikhathi sokufingqa sento.

Izinto ezigcina umswakama ezithinta i-cellulose e-hydrolyzed zihlanganisa i-pulp viscosity, inani elingeziwe, ubuhle bezinhlayiyana kanye nezinga lokushisa. Uma i-cellulose ether iba mkhulu, kuba ngcono ukumelana namanzi. I-Viscosity iyipharamitha yokusebenza ebalulekile ye-HPMC. Ngomkhiqizo ofanayo, imiphumela ye-viscosity elinganiswa ngezindlela ezihlukene ihlukahluka kakhulu, futhi abanye baze bafinyelele ukuqhubekela phambili kwejometri. Ngakho-ke, ukuqhathanisa ama-viscosities, kufanele kwenziwe phakathi kwezindlela ezifanayo zokuhlola, okuhlanganisa izinga lokushisa, i-spindle, njll.

Ngokuvamile, ukuphakama kwe-viscosity, kungcono ukusebenza okungangeni kwamanzi. Kodwa ukwanda okukhulu kwe-viscosity, i-HPMC, ukuphakama kwesisindo samangqamuzana, ukwehlisa izakhiwo ze-solubility, isisombululo sinamandla, futhi izakhiwo zithinteka kabi. Ukuphakama kwe-viscosity, kungcono umphumela wokuqina esixazululweni, kodwa hhayi ngokulingana ngokuqondile nesilinganiso. Ukuphakama kwe-viscosity, isisombululo esimanzi futhi esine-viscous, lapho kwakhiwa, sibonisa ukumelana okuphezulu phambi kwama-blade anamathelayo nezinto zokwakha. Kodwa ukwengeza amandla esakhiwo odakeni olumanzi ngokwako ngeke kusize. Ngesikhathi kwakhiwa lezi zakhiwo ezimbili, kwatholakala ukuthi umsebenzi wokulwa nomiyane wawungekho. Ngokuphambene, enye i-post-modified methacrylic acid ephansi ye-viscosity, kuyilapho i-cellulose ithuthukisa isisombululo esimanzi namandla esakhiwo, inezici ezinhle kakhulu.