IHydroxypropyl methylcellulose (HPMC) iyi-ether engeyona ionic cellulose eyenziwe nge-cellulose yezinto ze-polymer yemvelo ngochungechunge lwezinqubo zamakhemikhali. Ziyimpushana emhlophe engenaphunga, ayinambitheki futhi engenabuthi ekhukhumala ibe isixazululo se-colloidal esicacile noma esinamafu kancane emanzini abandayo. Inokuqina, ukubopha, ukuhlakaza, i-emulsifying, ukwenza ifilimu, ukumisa okwesikhashana, i-adsorbing, i-gelling, indawo esebenzayo, egcina umswakama kanye nezakhiwo ze-colloid ezivikelayo. I-Hydroxypropyl methyl cellulose kanye ne-methyl cellulose ingasetshenziswa ezintweni zokwakha, imboni kapende, i-resin yokwenziwa, imboni ye-ceramic, imithi, ukudla, izindwangu, ezolimo, amakhemikhali nsuku zonke nezinye izimboni.
Umphumela wokugcina amanzi kanye nomgomo we-hydroxypropyl methylcellulose HPMC
I-Cellulose ether HPMC idlala kakhulu indima yokugcina amanzi kanye nokujiya odakeni lukasimende kanye nodaka olusekelwe ku-gypsum, futhi ingathuthukisa ngempumelelo amandla ahlangene 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 wemikhiqizo enenani elifanayo le-HPMC elingeziwe. 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 ngokuphumelelayo inkinga yokugcinwa kwamanzi ngaphansi kwezinga lokushisa eliphezulu. 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, ukuze alawule ngokuphumelelayo ukuhwamuka kwamanzi okubangelwa izinga lokushisa eliphezulu, futhi kuzuzwe ukugcinwa kwamanzi aphezulu.
Ikhwalithi ephezulu ye-cellulose HPMC ingahlakazwa ngendlela efanayo nangempumelelo kusimende nemikhiqizo esekwe ku-gypsum, futhi isonge zonke izinhlayiya eziqinile, futhi yakha ifilimu yokumanzisa, umswakama osesisekelweni ukhishwa kancane kancane isikhathi eside, kanye ne-inorganic glue Ukusabela kwe-hydration yezinto ezihlanganisiwe kuzoqinisekisa amandla esibopho namandla okucindezelayo wento. Ngakho-ke, ekwakhiweni kwehlobo lokushisa eliphezulu, ukuze kuzuzwe umphumela wokugcina amanzi, kuyadingeka ukwengeza imikhiqizo ye-HPMC yekhwalithi ephezulu ngobuningi obanele ngokusho kwefomula, ngaphandle kwalokho, kuyoba khona i-hydration enganele, amandla ancishisiwe, ukuqhekeka, ukugoba nokuchithwa okubangelwa ukomisa ngokweqile. izinkinga, kodwa futhi ukwandisa nobunzima ukwakhiwa kwabasebenzi. Njengoba izinga lokushisa lehla, inani lamanzi i-HPMC engeziwe lingancishiswa kancane kancane, futhi umphumela ofanayo wokugcina amanzi ungafinyelelwa.
Ukugcinwa kwamanzi komkhiqizo we-hydroxypropyl methylcellulose HPMC ngokwawo kuvame ukuthintwa yizinto ezilandelayo:
I-HPMC esabela ngokulinganayo, i-methoxyl ne-hydroxypropoxyl isatshalaliswa ngokulinganayo, futhi izinga lokugcinwa kwamanzi liphezulu;
I-Cellulose ether HPMC izinga lokushisa lejeli elishisayo liphezulu, izinga lokugcinwa kwamanzi liphezulu; ngaphandle kwalokho, izinga lokugcinwa kwamanzi liphansi;
Lapho i-viscosity ye-cellulose ether HPMC ikhula, izinga lokugcinwa kwamanzi nalo liyakhuphuka; lapho i-viscosity ifinyelela ezingeni elithile, ukwanda kwezinga lokugcinwa kwamanzi kuvame ukuba mnene;
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 likhuphuka ngokushesha ngokunyuka kwenani elingeziwe; lapho inani elingeziwe likhuphuka, inkambiso yokwenyuka kwezinga lokugcina amanzi iyancipha.
Isikhathi sokuthumela: Jun-01-2023