I-Hydroxypropyl methylcellulose, ebizwa ngokuthi: i-HPMC noma i-MHPC. Ukubukeka kwayo kuyimpuphu emhlophe noma engabonakali; ukusetshenziswa kwayo okuyinhloko kuyisihlanzi ekukhiqizweni kwe-polyvinyl chloride, futhi iyisithasiselo esiyinhloko sokulungiselela i-PVC nge-polymerization yokumiswa. Enqubweni yokwakha embonini yokwakha, isetshenziswa kakhulu ekwakheni ngomshini njengokwakha udonga, ukuplasta, ukufaka i-caulking, njll.; ikakhulukazi ekwakheni kokuhlobisa, isetshenziselwa ukunamathisela amathayili e-ceramic, imabula, kanye nemihlobiso yepulasitiki. Inamandla aphezulu okubopha futhi inganciphisa inani lesimende. . Isetshenziswa njengesithambisi embonini yokupenda, okungenza ungqimba lukhanye futhi lube mnene, kuvimbele ukususwa kwempuphu, kuthuthukise ukusebenza kwe-leveling, njll.
Ku-samente mortar kanye ne-gypsum-based slurry, i-hydroxypropyl methylcellulose idlala indima yokugcina amanzi kanye nokuqina, okungathuthukisa ngempumelelo amandla ahlangene kanye nokumelana nokuwa kwe-slurry.
Izici ezifana nokushisa komoya, izinga lokushisa kanye nesivinini sokucindezela komoya kuzothinta izinga lokuguquguquka kwamanzi emikhiqizweni yesamente kanye nemikhiqizo esekelwe ku-gypsum. Ngakho-ke, ezinkathini ezahlukene, kunomehluko othile emphumeleni wokugcina amanzi wemikhiqizo enenani elifanayo le-hydroxypropyl methylcellulose elingeziwe.
Ekwakhiweni okuthile, umphumela wokugcina amanzi we-slurry ungalungiswa ngokwandisa noma ukunciphisa 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-hydroxypropyl methylcellulose ingaxazulula ngempumelelo inkinga yokugcina amanzi ngaphansi kokushisa okuphezulu. Ezinkathini zokushisa okuphezulu, ikakhulukazi ezindaweni ezishisayo nezomile kanye nokwakhiwa okunezingqimba ezincane ohlangothini olunelanga, i-HPMC esezingeni eliphezulu iyadingeka ukuthuthukisa ukugcina amanzi kwe-slurry.
I-HPMC esezingeni eliphezulu inokufana okuhle kakhulu. Amaqembu ayo e-methoxy kanye ne-hydroxypropoxy asatshalaliswa ngokulinganayo ku-cellulose molecular chain, okungathuthukisa ikhono lama-athomu e-oxygen kuma-hydroxyl kanye ne-ether bonds lokuhlangana namanzi ukuze kwakheke ama-hydrogen bonds. , ukuze amanzi akhululekile abe ngamanzi aboshwe, ukuze kulawulwe ngempumelelo ukuhwamuka kwamanzi okubangelwa yisimo sezulu esishisa kakhulu, futhi kufezwe ukugcinwa kwamanzi okuphezulu.
Amanzi ayadingeka ukuze kufakwe umswakama ukuze kufakwe izinto ezifaka usawoti njengesamente ne-gypsum. Inani elifanele le-HPMC lingagcina umswakama ku-mortar isikhathi eside ngokwanele ukuze inqubo yokubeka nokuqinisa iqhubeke.
Inani le-HPMC elidingekayo ukuze kutholakale ukugcinwa kwamanzi okwanele lincike ku:
1. Ukumuncwa kwesendlalelo sesisekelo
2. Ukwakheka kwe-mortar
3. Ubukhulu bengqimba yodaka
4. Isidingo samanzi se-mortar
5. Isikhathi sokusetha izinto zokugaya
I-hydroxypropyl methylcellulose esezingeni eliphezulu ingasakazwa ngokulinganayo nangokuphumelelayo ku-cement mortar kanye nemikhiqizo esekelwe ku-gypsum, futhi igoqe zonke izinhlayiya eziqinile, bese yakha ifilimu yokumanzisa, futhi umswakama osesisekelweni ukhishwa kancane kancane isikhathi eside, kanye nokusabela kokumanzisa ngezinto ezingaphili ze-gelling ukuqinisekisa amandla okubopha kanye namandla okucindezela kwezinto.
Ngakho-ke, ekwakheni ehlobo okushisa okuphezulu, ukuze kufezwe umphumela wokugcina amanzi, kuyadingeka ukwengeza imikhiqizo ye-HPMC esezingeni eliphezulu ngobuningi obanele ngokwefomula, ngaphandle kwalokho, kuzoba nokumanzi okwanele, amandla anciphile, ukuqhekeka, ukugoba kanye nokuchitheka okubangelwa ukoma ngokweqile. Kodwa futhi kwandisa ubunzima bokwakha bezisebenzi. Njengoba izinga lokushisa lehla, inani lamanzi engeziwe i-HPMC lingancishiswa kancane kancane, futhi umphumela ofanayo wokugcina amanzi ungafinyelelwa.
Isikhathi sokuthunyelwe: Jan-16-2023