Udaka lokuzimela lungathembela esindweni salo uqobo ukwakha isisekelo esithambile, esibushelelezi futhi esiqinile esisekelweni sokufaka noma ukubopha ezinye izinto eziningi, futhi ngasikhathi sinye. Ngakho-ke, i-fluidity ephezulu iyisici esibaluleke kakhulu sodaka lokuzimela. Ngaphezu kwalokho, kumele ibe nokugcinwa kwamanzi kanye nokugcinwa kwamanzi, akukho menomenuon waunyethi, futhi ube nezimpawu zokufakwa kokushisa kanye nokushisa okuphansi kokushisa.
Ngokuvamile, udaka olwenzelwe ukuzimela kudinga uketshezi oluhle, kepha uketshezi lokunamathisela kosimende wangempela luvame kuphela ngo-10-300px; I-Celsulose Ether isengezo esikhulu sodaka oluyisilungele, yize inani lokungezwa liphansi kakhulu, lingathuthukisa kakhulu ukusebenza kodaka, lingathuthukisa ukuvumelana, ukusebenza okusebenzayo kanye nokusebenza kokugcinwa kwamanzi kanye nokusebenza kokugcinwa kwamanzi kanye nokwenza umsebenzi wokugcina amanzi kodaka. Idlala indima ebaluleke kakhulu emkhakheni wodaka olumiswe ngomumo.
1. I-Fluity: I-CelLose Ether inethonya elibalulekile ekugcinweni kwamanzi, ukuguquguquka nokusebenza kokwakha kodaka lokuzimela. Ikakhulu njengodaka oluzimele, u-fluidity kungenye yezinkomba eziphambili zokuhlola ukusebenza kwezinga elizimele. Ngaphansi kwesisekelo sokuqinisekisa ukwakheka okujwayelekile kodaka, uketshezi lodaka lungashintshwa ngokushintsha inani le-cellulose ether. Kodwa-ke, uma inani liphezulu kakhulu, uketshezi lodaka luzoncishiswa, ngakho-ke inani le-cellulose ether hpmc kufanele lilawulwe kuhlu olunengqondo.
2. Ukugcinwa kwamanzi: Ukugcinwa kwamanzi kodaka kuyinkomba ebalulekile ukukala ukuqina kwezinto zangaphakathi zodaka olusanda kuxutshwa. Ukuze ufeze ngokuphelele ukusabela kwe-hydrate ye-gel impahla, inani elifanelekile le-cellulose ether lingagcina umswakama odongeni isikhathi eside. Ngokuvamile, inani lokugcina lamanzi le-slurry landa ngokwanda kokuqukethwe kwe-cellulose ether. Umphumela wokugcina amanzi we-cellulose ether hpmc ungavimbela i-substrate ukuthi ingangeni manzi amaningi kakhulu ngokushesha, futhi ivimbezele ukuhwamuka kwamanzi, ukuze kuqinisekiswe ukuthi indawo ebabazekayo ihlinzeka ngamanzi anele okusebenza ngosimende. Ngaphezu kwalokho, ukubonwa kwe-vercuLose Ether nakho kunethonya elikhulu ekugcinweni kwamanzi kodaka. Ukuphakama okuphezulu, kungcono ukugcinwa kwamanzi. Ngokuvamile, i-cellulose ether hpmc ene-viscosity ye-400MPA.S isetshenziswa kakhulu ku-wortar ozilinganisa, ongathuthukisa ukusebenza kwezinga lodaka futhi andise ukuhlanganiswa kodaka.
3. Ukubeka isikhathi: I-Cellulose Ether inomphumela othile wokubuyisa ngodaka. Ngokukhuphuka kokuqukethwe kwe-cellulose ether, isikhathi sokusetha sodaka. Umphumela wokubuyisa we-cellulose ether hpmc ku-Cement Paste ikakhulukazi kuya ngezinga lokufakwa esikhundleni se-ALKYL Group, futhi unabo ubudlelwano obuncane nesisindo salo se-molecular. Uma lincane kakhulu i-Alkyl Exfunce, likhulisa okuqukethwe kwe-hydroxyl, futhi kusobala kakhulu umphumela wokubuyisa. Futhi okuphezulu kokuqukethwe kwe-cellulose ether, okusobala okusobala komphumela wokubambezeleka wesendlalelo sefilimu eyinkimbinkimbi ku-hydration yokuqala ka usimende, ngakho-ke umphumela wokugcina kabusha ubusobala futhi.
4 Amandla acindezelayo namandla aguqukayo odaka azokwehla ngokwanda kokuqukethwe kwe-cellulose ether HPMC.
5 I-Cellulose Ether yakha ifilimu ye-polymer ngomphumela wokuvalwa kwezimpawu zokubopha phakathi kwesistimu yesigaba sesimo sohlelo, olukhuthaza amanzi amaningi kwi-polymer film, okulungele i-hydration ephelele yekhonkolo, ngaleyo ndlela ithuthukise isibopho amandla okunamathisela ngemuva kokuqina. Ngasikhathi sinye, inani elifanele le-cellulose etre lenyusa i-plastity kanye nokuguquguquka kodaka, kunciphisa ukuqina kwendawo yokuguqula phakathi kosimende kanye nesibonisi se-substrate, futhi kunciphisa amandla okuslayidi phakathi kwezindawo zokuxhumana. Ngokwezinga elithile, umphumela onobudlelwano phakathi kodaka kanye no-substrate uthuthukiswa. Ngaphezu kwalokho, ngenxa yokuba khona kwe-cellulose ether ku-Cement Paste, indawo ekhethekile yokuguqula isimo kanye nesendlalelo se-interface sakhiwa phakathi kwezinhlayiya zodaka nomkhiqizo we-hydration. Le ndlarface esibonakalayo yenza indawo yokuguqulwa kwesimo esibonakalayo iguqulwe kakhudlwana futhi iqinile, ngakho-ke, ukuze udaka lube namandla amakhulu ebhondi.
Isikhathi sePosi: Feb-27-2023