I-Hydroxypropyl methyl cellulose HPMC iyi-ether engeyona ionic cellulose eyenziwe nge-cellulose ye-polymer yemvelo ngochungechunge lokucutshungulwa kwamakhemikhali.Ziyimpushana emhlophe engenaphunga, ayinambitheki futhi engenabuthi ekhukhumala ibe isixazululo se-colloidal esicacile noma esithuthuma kancane 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 I-HPMC idlala indima enkulu yokugcina amanzi kanye nokujiya odakeni lukasimende kanye nodaka olusekelwe ku-gypsum, olungathuthukisa ngempumelelo amandla okubopha kanye nokumelana nokuncipha 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 okukhethekile, 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.Ezinkathini zokushisa eziphakeme, 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 eceleni kweketango lamangqamuzana e-cellulose, elingathuthukisa ikhono lama-athomu omoya-mpilo ku-hydroxyl ne-ether bond ukuze ahlangane namanzi ukuze akhe ibhondi ye-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 ngamanani anele ngokuya ngefomula, ngaphandle kwalokho, ukufakwa kwamanzi okwanele, amandla ancishisiwe, ukuqhekeka, ukugoba nokuwa. kuzokwenzeka ngenxa yokoma 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