I-Hydroxypropyl methyl cellulose HPMC iyi-ether engeyona ionic cellulose eyenziwe nge-cellulose yezinto ze-polymer yemvelo ngochungechunge lokucutshungulwa kwamakhemikhali. Ziyimpushana emhlophe engenaphunga, enganambitheki futhi engenabuthi evuvukala ibe isixazululo se-colloidal esicacile noma esithe ukubanda emanzini abandayo. Inezici zokuqina, ukubopha, ukuhlakazeka, i-emulsification, ukwakheka kwefilimu, ukumiswa, i-adsorption, i-gelation, umsebenzi ongaphezulu, ukugcinwa komswakama kanye ne-colloid evikelayo. I-Hydroxypropyl methylcellulose ingasetshenziswa ezintweni zokwakha, imboni yokuhlanganisa, i-synthetic resin, imboni ye-ceramic, imithi, ukudla, izindwangu, ezolimo, imboni yamakhemikhali yansuku zonke nezinye izimboni.
Umsebenzi nomgomo wokugcina amanzi: i-cellulose ether HPMC idlala indima enkulu yokugcina amanzi kanye nokujiya odakeni lukasimende kanye nodaka olusekelwe ku-gypsum, olungathuthukisa ngempumelelo amandla okubopha kanye nokumelana nokucwila kwe-slurry. Izinto ezifana nezinga lokushisa lomoya, izinga lokushisa kanye nesivinini somfutho womoya zizothinta izinga lokuguquguquka kwamanzi odaka lukasimende kanye nemikhiqizo esekelwe ku-gypsum. Ngakho-ke, ezinkathini ezihlukene zonyaka, kunomehluko othile kumphumela wokugcina amanzi wenani elifanayo lemikhiqizo ye-HPMC. Ekwakhiweni okuthile, umphumela wokugcina amanzi we-slurry ungalungiswa ngokwandisa noma ukwehlisa inani le-HPMC elingeziwe.
Ukugcinwa kwamanzi kwe-methyl cellulose ether ngaphansi kwezimo zokushisa okuphezulu kuyinkomba ebalulekile yokuhlukanisa ikhwalithi ye-methyl cellulose ether. Imikhiqizo emihle kakhulu yochungechunge lwe-HPMC ingaxazulula ngempumelelo inkinga yokugcinwa kwamanzi emazingeni okushisa aphezulu. Ezikhathini zokushisa okuphezulu, ikakhulukazi ezindaweni ezishisayo nezomile kanye nokwakhiwa kongqimba oluncane ohlangothini olushisayo, i-HPMC yekhwalithi ephezulu iyadingeka ukuze kuthuthukiswe ukugcinwa kwamanzi odaka.
Ikhwalithi ephezulu ye-HPMC inokufana okuhle kakhulu. Amaqembu ayo e-methoxy kanye ne-hydroxypropoxy asatshalaliswa ngokulinganayo eduze kweketango lamangqamuzana e-cellulose, elingathuthukisa ikhono lama-athomu omoya-mpilo ku-hydroxyl ne-ether bond ukuze ahlangane namanzi ukuze akhe amabhondi e-hydrogen. , Ukuze amanzi amahhala abe amanzi abophekile, ngaleyo ndlela alawule ngokuphumelelayo ukuhwamuka kwamanzi okubangelwa izinga lokushisa eliphezulu, nokufeza ukugcinwa kwamanzi aphezulu.
Ikhwalithi ephezulu ye-cellulose HPMC ingahlakazwa ngendlela efanayo nangempumelelo odakeni lukasimende kanye nemikhiqizo esekelwe ku-gypsum, futhi isonge zonke izinhlayiya eziqinile, futhi yakhe ungqimba lwefilimu yokumanzisa. Amanzi asesisekelweni akhululwa kancane kancane isikhathi eside. Impahla ejiyile ithola ukusabela kwe-hydration, ukuze kuqinisekiswe amandla okubopha kanye namandla acindezelayo wento. Ngakho-ke, ekwakhiweni kwehlobo lokushisa eliphezulu, ukuze kuzuzwe umphumela wokugcinwa kwamanzi, imikhiqizo yekhwalithi ephezulu ye-HPMC kufanele yengezwe ngobuningi obanele ngokusho kwefomula, ngaphandle kwalokho, ukuntuleka kwe-hydration, amandla ancishisiwe, ukuqhekeka, ukugoba nokuwa kuzokwenzeka ngenxa yokomisa ngokweqile. Izinkinga, kodwa futhi zandise ubunzima bezisebenzi zokwakha. Njengoba izinga lokushisa lincipha, inani le-HPMC elingeziwe lingancishiswa kancane kancane, futhi umphumela ofanayo wokugcina amanzi ungafinyelelwa.
Ukugcinwa kwamanzi kwe-HPMC kuthintwa yizinto ezilandelayo:
1. I-Homogeneity ye-cellulose ether HPMC
Ku-HPMC esabela ngendlela efanayo, amaqembu e-methoxy nawe-hydroxypropoxy asatshalaliswa ngokulinganayo, futhi izinga lokugcinwa kwamanzi liphezulu.
2. Izinga lokushisa lejeli elishisayo le-cellulose ether HPMC
Izinga lokushisa lejeli elishisayo liphezulu, izinga lokugcinwa kwamanzi liphezulu; ngokuphambene nalokho, izinga lokugcinwa kwamanzi liphansi.
3. I-viscosity ye-cellulose ether HPMC
Lapho i-viscosity ye-HPMC ikhula, izinga lokugcinwa kwamanzi liyanda; lapho i-viscosity ifinyelela ezingeni elithile, ukwanda kwezinga lokugcinwa kwamanzi kuvame ukuba flat.
4. Ukwengezwa kwe-cellulose ether HPMC
Uma likhulu inani le-cellulose ether HPMC engeziwe, izinga lokugcinwa kwamanzi liyakhuphuka kanye nomphumela wokugcina amanzi ube ngcono. Ebangeni lokuhlanganisa okungu-0.25-0.6%, izinga lokugcinwa kwamanzi likhula ngokushesha ngokunyuka kwenani elingeziwe; lapho inani elingeziwe likhuphuka, inkambiso ekhulayo yezinga lokugcinwa kwamanzi iyancipha.
Isikhathi sokuthumela: Dec-16-2021