I-Cellulose ether HPMC kudaka lukasimende kanye ne-gypsum based slurry, ikakhulukazi idlala indima yokugcina amanzi nokuqina, ingathuthukisa ngempumelelo ukunamathela nokumelana nokucwila kwe-slurry.
Izinga lokushisa lomoya, izinga lokushisa kanye nezinga lomfutho womoya lingathinta izinga lokuhwamuka kwamanzi odaka lukasimende kanye nemikhiqizo esekelwe ku-gypsum. Ezinkathini ezihlukene zonyaka, umphumela wokugcina amanzi we-slurry ungalungiswa ngokukhuphula noma ukwehlisa inani le-HPMC. Ekwakhiweni kwehlobo lokushisa eliphezulu, ukuze kuzuzwe umphumela wokongiwa kwamanzi, kuyadingeka ukwengeza imikhiqizo ye-HPMC ngobuningi obanele ngokusho kwefomula. Uma kungenjalo, kuzoba khona ukugeleza kwamanzi okwanele, ukunciphisa amandla, ukuqhekeka, isigubhu esingenalutho kanye nokuchithwa okubangelwa ukomisa okusheshayo, nezinye izinkinga zekhwalithi. Njengoba izinga lokushisa lincipha, inani le-HPMC lingancishiswa kancane kancane, futhi umphumela ofanayo wokugcina amanzi ungafinyelelwa.
Kunomehluko othile nezizathu zomphumela wokugcina amanzi wenani elifanayo lemikhiqizo engezwe nge-HPMC. Imikhiqizo emihle kakhulu yochungechunge lwe-HPMC ingaxazulula ngokuphumelelayo inkinga yokugcinwa kwamanzi ngaphansi kwezinga lokushisa eliphezulu. Esikhathini sokushisa 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, amaqembu ayo e-methoxy kanye ne-hydroxypropyl eduze nokusabalalisa iyunifomu yamangqamuzana e-cellulose, ingathuthukisa ibhondi ye-hydroxyl ne-ether kuma-athomu omoya-mpilo kanye nekhono le-hydrogen bond lenhlangano yamanzi, yenze amanzi amahhala abe amanzi ahlangene. Futhi ihlakazeke ngokuphumelelayo ku-slurry futhi isongwe zonke izinhlayiya eziqinile, ukusabela kwe-hydration ngezinto ze-inorganic cementing, kanye nokwakheka kongqimba lwefilimu yokumanzisa, amanzi kusisekelo akhululwa kancane kancane isikhathi eside, ukuze alawule ngempumelelo ukuhwamuka kwamanzi okubangelwa. ngokushisa okuphezulu kwesimo sezulu, ukufeza ukugcinwa kwamanzi aphezulu.
Ukugcinwa kwamanzi kwemikhiqizo ye-HPMC kuvame ukuthintwa yizinto ezilandelayo:
1. Ukufana kwe-HPMC:Ukusabela okufanayo kwe-HPMC, i-methoxy, ukusatshalaliswa komfaniswano we-hydroxypropoxy, ukugcinwa kwamanzi okuphezulu.
2 HPMC izinga lokushisa lejeli elishisayo: Ijeli elishisayo liphezulu
izinga lokushisa kanye nezinga eliphezulu lokugcinwa kwamanzi; ngaphandle kwalokho, inezinga eliphansi lokugcina amanzi.
3. I-viscosity ye-HPMC:Lapho i-viscosity ye-HPMC inyuka, izinga lokugcinwa kwamanzi nalo liyakhuphuka. Lapho i-
i-viscosity ifinyelela izinga elithile, ukwanda kwezinga lokugcinwa kwamanzi kuvame ukuba mnene.
4. Okuqukethwe kwe-HPMC:Uma i-HPMC ingeziwe, izinga lokugcina amanzi liyakhuphuka futhi kuba ngcono nomphumela wokugcina amanzi. Ezingeni lika-0.25-0.6%, izinga lokongiwa kwamanzi likhuphuke ngokushesha ngokunyuka kwenani elingeziwe. Lapho inani elingeziwe likhuphuka kakhulu, ukuthambekela kokwenyuka kwezinga lokongiwa kwamanzi kwahamba kancane.
Isikhathi sokuthumela: Jul-29-2022