I-Hydroxypropyl Methyl Cellulose (HPMC) kanye nesimiso sokugcina amanzi!

I-Hydroxypropyl methylcellulose (HPMC) iyi-non-ionic cellulose ether eyenziwe nge-cellulose yemvelo ye-polymer ngokusebenzisa uchungechunge lwezinqubo zamakhemikhali. Ziyimpuphu emhlophe engenaphunga, engenambitheki futhi engenabuthi evuvukala ibe yisisombululo se-colloidal esicacile noma esinamafu kancane emanzini abandayo. Inezakhiwo zokujiya, zokubopha, zokuhlakaza, zokuhlanganisa, zokwakha ifilimu, zokumiswa, zokufaka i-gelling, zokufaka i-gelling, ezisebenza ebusweni, zokugcina umswakama kanye nezokuvikela i-colloid. I-Hydroxypropyl methyl cellulose kanye ne-methyl cellulose zingasetshenziswa ezintweni zokwakha, embonini yopende, i-resin yokwenziwa, imboni ye-ceramic, imithi, ukudla, indwangu, ezolimo, amakhemikhali ansuku zonke kanye neminye imboni.

Umphumela wokugcina amanzi kanye nesimiso se-hydroxypropyl methylcellulose HPMC

I-cellulose ether HPMC idlala indima yokugcina amanzi kanye nokuqina ku-samente mortar kanye ne-gypsum-based slurry, futhi ingathuthukisa ngempumelelo amandla ahlangene kanye nokumelana nokuwa kwe-slurry.

Izinto ezifana nokushisa komoya, izinga lokushisa kanye nesivinini sokucindezela komoya kuzothinta izinga lokuguquguquka kwamanzi ku-cement mortar kanye nemikhiqizo esekelwe ku-gypsum. Ngakho-ke, ezinkathini ezahlukene, kunomehluko othile emphumeleni wokugcina amanzi wemikhiqizo enenani elifanayo le-HPMC 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-HPMC 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 ukugcinwa kwamanzi 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 ukuhlangana namanzi ukwakha ama-hydrogen bonds. , ukuze amanzi akhululekile abe amanzi aboshwe, ukuze kulawulwe ngempumelelo ukuhwamuka kwamanzi okubangelwa yisimo sezulu esishisa kakhulu, futhi kufezwe ukugcinwa kwamanzi okuphezulu.

I-HPMC ye-cellulose esezingeni eliphezulu ingasakazwa ngokulinganayo nangokuphumelelayo ku-cement mortar kanye nemikhiqizo esekelwe ku-gypsum, futhi igoqe zonke izinhlayiya eziqinile, bese yakha ifilimu yokumanzisa, umswakama osesisekelweni ukhishwa kancane kancane isikhathi eside, kanye ne-inorganic glue. Ukusabela kokumanzisa kwezinto ezihlanganisiwe kuzoqinisekisa amandla okubopha kanye namandla okucindezela kwezinto. Ngakho-ke, ekwakheni izinga lokushisa eliphezulu lasehlobo, ukuze kufezwe umphumela wokugcina amanzi, kuyadingeka ukwengeza imikhiqizo ye-HPMC esezingeni eliphezulu ngobuningi obanele ngokwefomula, ngaphandle kwalokho, kuzoba nokumanzisa okwanele, amandla ancishisiwe, ukuqhekeka, ukugoba kanye nokuchitheka okubangelwa ukoma ngokweqile. izinkinga, kodwa futhi kwandisa ubunzima bokwakha bezisebenzi. 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 uqobo kuvame ukuthintwa yizici ezilandelayo:

I-HPMC, i-methoxyl kanye ne-hydroxypropoxyl ezisabela ngokulinganayo zisatshalaliswa ngokulinganayo, futhi izinga lokugcina amanzi liphezulu;

Izinga lokushisa lejeli yokushisa ye-cellulose ether HPMC liphezulu, izinga lokugcina amanzi liphezulu; ngaphandle kwalokho, izinga lokugcina amanzi liphansi;

Lapho i-viscosity ye-cellulose ether HPMC ikhula, izinga lokugcina amanzi nalo liyakhula; lapho i-viscosity ifinyelela ezingeni elithile, ukwanda kwesilinganiso sokugcina amanzi kuvame ukuba mnene;

Uma inani le-cellulose ether HPMC likhudlwana, izinga lokugcina amanzi liyanda futhi umphumela wokugcina amanzi uba ngcono. Esibangeni sokwengezwa okungu-0.25-0.6%, izinga lokugcina amanzi liyanda ngokushesha ngokwanda kwenani lokwengeza; lapho inani lokwengeza likhula ngokwengeziwe, umkhuba wokwanda kwesilinganiso sokugcina amanzi uyehla.