IHydroxypropyl Methylcellulose (HPMC)iyinhlanganisela ye-cellulose ether ebalulekile esetshenziswa kabanzi ezintweni zokwakha, ikakhulukazi odakeni olusekelwe kusimende, izinto ezisekelwe ku-gypsum kanye nama-coatings. I-HPMC idlala indima ebalulekile ekuthuthukiseni izakhiwo zodaka, okuhlanganisa nokuthuthukisa izakhiwo zayo zokuvimbela amanzi.
1. Thuthukisa ukugcinwa kwamanzi odaka
Esinye sezici eziphawuleka kakhulu ze-HPMC umthamo wayo omuhle kakhulu wokugcina amanzi. Ukwengeza i-HPMC odakeni kunganciphisa kakhulu izinga lokulahlekelwa kwamanzi odaka. Ukusebenza okuqondile kuthi:
Nweba isikhathi sokuphendula usimende: I-HPMC ingagcina umswakama ofanele ngaphakathi kodaka futhi iqinisekise ukuthi izinhlayiya zikasimende zisabela ngokugcwele emanzini ukuze zenze umkhiqizo ominyene.
Ivimbela ukwakheka kwemifantu: Ukulahlekelwa kwamanzi ngokushesha kungabangela udaka futhi luqalise imifantu emincane, ngaleyo ndlela kunciphise izakhiwo zokuvimbela amanzi.I-HPMCinganciphisa izinga lokulahlekelwa kwamanzi futhi inciphise imifantu ebangelwa ukuncipha okomile.
Ukuthuthukiswa kokusebenza kokugcinwa kwamanzi kwenza ukwakheka kwangaphakathi kwe-mortar denser, kunciphisa i-porosity, futhi kuthuthukisa ngokuphawulekayo ukungagxili kodaka, ngaleyo ndlela kuthuthukise ukusebenza kwawo okungangeni manzi.
2. Thuthukisa ukusebenza kodaka
Izici ze-viscosity ze-HPMC zithuthukisa izakhiwo ze-rheological zodaka, ngaleyo ndlela zithuthukise ukusebenza kwawo:
Yehlisa ukopha: I-HPMC ingahlakaza amanzi ngokulinganayo, ivumele amanzi ukuthi asatshalaliswe ngokuzinza odakeni futhi inciphise nezimbotshana ezibangelwa ukuhlukana kwamanzi.
Thuthukisa ukunamathela kodaka: I-HPMC ithuthukisa amandla okubopha phakathi kodaka nezinto eziyisisekelo, ivumela udaka ukuthi lumboze ubuso bezinto eziyisisekelo eduze, ngaleyo ndlela kuncishiswe ukuthi kungenzeka ukuthi umswakama ungene ngegebe phakathi kwezinto eziyisisekelo nodaka. .
Ukuthuthukiswa kwekhwalithi yokwakha kuthinta ngokuqondile umphumela wokuvimbela amanzi odaka. Isendlalelo sesembozo esiwumfaniswano nesiminyene singavimbela ngempumelelo ukungena komswakama.
3. Yakha ifilimu yokuvikela phezulu
I-HPMC inezinto zokwenza ifilimu futhi ingakha ifilimu elivikelayo elincanyana neliminyene phezu kodaka:
Yehlisa izinga lokuhwamuka kwamanzi: Ngemva kokuqedwa kokwakhiwa, i-HPMC izokwakha ifilimu yokuvikela phezu kodaka ukuze kuncishiswe ukumuncwa komswakamo ngaphakathi kodaka ngendawo yangaphandle.
Vimba ukungena komswakama: Isendlalelo se-HPMC ngemva kokubunjwa kwefilimu sinezinga elithile lokungangeni kwamanzi futhi singasetshenziswa njengesithiyo sokuvimbela umswakama wangaphandle ukuthi ungangeni ngaphakathi kodaka.
Lesi sivikelo esingaphezulu sinikeza ukuvikeleka okwengeziwe kwezindawo zokuvikela amanzi zodaka.
4. Yehlisa i-porosity yodaka
I-HPMC ingathuthukisa ngempumelelo i-microstructure yodaka. Indlela yokusebenza kwayo imi kanje:
Umphumela wokugcwalisa: Ama-molecule e-HPMC angangena esakhiweni se-microporous odakeni futhi agcwalise ingxenye yama-pores, ngaleyo ndlela anciphise imigudu yomswakama.
Thuthukisa ukuminyana kwemikhiqizo yokukhipha amanzi emzimbeni: Ngokugcina amanzi, i-HPMC ithuthukisa ukufana nokubumbana kwemikhiqizo kasimende yokufakwa kwamanzi futhi yehlise inani lezimbotshana ezinkulu ezisesimendeni.
Ukwehliswa kwe-porosity yodaka akugcini nje ukuthuthukisa ukusebenza kokuvimbela amanzi, kodwa futhi kuthuthukisa ukuqina kodaka.
5. Thuthukisa ukumelana nesithwathwa nokuqina
Ukungena kwamanzi kuzodala ukuthi udaka lonakaliswe ngenxa yesithwathwa esiguquguqukayo ezindaweni ezishisayo. Umthelela wokuvimbela amanzi we-HPMC unganciphisa ukungena kwamanzi futhi unciphise umonakalo odakeni obangelwa imijikelezo yokuncibilika kweqhwa:
Vimbela ukugcinwa komswakama: Yehlisa ukugcina umswakama ngaphakathi kodaka futhi unciphise umphumela wokuphakama kwesithwathwa.
Impilo yodaka enwetshiwe: Ngokunciphisa ukuhlaselwa kwamanzi kanye nokulimala kweqhwa, i-HPMC inyusa ukuqina kwesikhathi eside kwedaka.
I-HPMC ithuthukisa ukusebenza kodaka olungangeni manzi ngokusebenzisa lezi zici ezilandelayo: ukwenza ngcono ukugcinwa kwamanzi, ukwenza ngcono ukusebenza kahle, ukwenza ifilimu evikelayo, ukunciphisa i-porosity nokuthuthukisa ukumelana nesithwathwa. Umthelela we-synergistic walezi zakhiwo wenza udaka lubonise imiphumela engcono yokuvimbela amanzi ezinhlelweni ezingokoqobo. Kungakhathaliseki ukuthi kusezinsimbi ezivimbela amanzi, osimende abazilinganisa ngokwabo noma izinto zokunamathisela zamathayela,I-HPMCidlala indima ebalulekile.
Ezisetshenziswa ezingokoqobo, inani le-HPMC elengeziwe lidinga ukuthuthukiswa ngokuya ngezidingo ezithile ukuze kuqinisekiswe ukuthi ayikwazi nje kuphela ukusebenzisa umphumela omuhle kakhulu wokuvimbela amanzi, kodwa futhi nokugcina ibhalansi yezinye izinkomba zokusebenza kodaka. Ngokusetshenziswa okunengqondo kwe-HPMC, ukusebenza okungangeni manzi kwezinto zokwakha kungathuthukiswa kakhulu futhi nokuvikelwa okuthembekile kunganikezwa kumaphrojekthi wokwakha.
Isikhathi sokuthumela: Nov-23-2024