Umphumela we-HPMC ekusebenzeni kodaka lokuzimela

Udaka lokuzimela lungathembela esindweni salo ukuze wakhe isisekelo esithambile, esibushelelezi futhi esinamandla engxenyeni engezansi yokubeka noma ukubopha ezinye izinto. Ngasikhathi sinye, kungakha ukwakhiwa okukhulu nokusebenza kahle. Ngakho-ke, i-fluidity ephezulu iyisici esibaluleke kakhulu sodaka lokuzimela ngokungezelela, kufanele ibe nokugcinwa kwamanzi kanye namandla okubopha, akukho ngxenye yokuhlukaniswa kwamanzi, futhi ube nezimpawu zokuvimbela ukushisa kanye nokushisa okuphansi okuphansi.

Ngokuvamile, udaka oluzimisele ngokuzimela kudinga uketshezi oluhle, kepha uketshezi lokunamathisela kosimende wangempela luvame ukufika kuka-10-12cm; Phakathi kwezithathela ze-cellulose, i-hpdroxypropyl methylcellulose (HPMC) yisengezo esikhulu sodaka oluyisilungele, yize inani lokungezwa liphansi kakhulu, lingathuthukisa ukuguquguquka, ukusebenza komsebenzi, ukusebenza okubopha amanzi kanye nokusebenza kokugcinwa kwamanzi kanye nokwenza umsebenzi wokugcina amanzi kodaka. Idlala indima ebaluleke kakhulu emkhakheni wodaka olumiswe ngomumo.

1. Ukuhamba

I-Hydroxypropyl Methylcellulose (HPMC) 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-HPMC. Kodwa-ke, uma umthamo uphezulu kakhulu, uketshezi lodaka luzoncishiswa, ngakho-ke umthamo we-HPMC kufanele alawulwe ngaphakathi kwebanga elifanele.

2. Ukugcinwa kwamanzi

Ukugcinwa kwamanzi ngodaka kuyinkomba ebalulekile yokukala ukuqina kwezingxenye zangaphakathi zodaka olusanda kuxutshwa. Ukuze ufeze ngokuphelele ukusabela kwe-hydration kwe-gel material, inani elifanelekile le-HPMC lingagcina umswakama odongeni isikhathi eside. Ngokuvamile, inani lokugcinwa kwamanzi le-slurry landa ngokwanda kokuqukethwe kwe-HPMC. Umsebenzi wokugcina amanzi we-HPMC angavimbela i-substrate ukuthi ingangeni manzi amaningi kakhulu ngokushesha, futhi ivimbezele ukuhwamuka kwamanzi ngokushesha, ukuze aqinisekise ukuthi indawo ebabazekayo ihlinzeka ngamanzi anele nge-hydration. Ngaphezu kwalokho, ukubonwa kwe-hydroxypropylylylylyly futhi kunethonya elikhulu ekugcinweni kwamanzi kodaka. Ukuphakama okuphezulu, kungcono ukugcinwa kwamanzi. Ngokuvamile, imikhiqizo ene-viscosity ecishe ibe ngu-400MPA.S isetshenziselwa kakhulu udaka oluzenzakalelayo, olungathuthukisa ukusebenza kwezinga lodaka nokwandisa ukuhlanganiswa kodaka.

3. Ukubeka isikhathi

I-HPMC inomphumela othile wokubuyisa ngodaka. Ngokukhuphuka komthamo, isikhathi sokubeka udaka siyenzeka isikhathi eside. Umphumela wokubuyisa we-HPMC ku-Cement Paste ikakhulukazi kuncike ekufakweni kwamaqembu e-Alkyl, futhi unabo ubudlelwano obuncane nesisindo sawo se-molecular. Uma lincane kakhulu i-Alkyl Exfunce, likhulisa okuqukethwe kwe-hydroxyl, futhi kusobala kakhulu umphumela wokubuyisa. Futhi okuphezulu kwe-HPMC okuqukethwe, okusobala okusobala komphumela wesendlalelo sefilimu eyinkimbinkimbi ekubuyiselweni kuka-hydradition wokuqala, ngakho-ke umphumela wokugcina kabusha ubusobala futhi.

4. Amandla aguqukayo namandla acindezelayo

Imvamisa, amandla kungenye yezinkomba zokuhlola ezibalulekile zomphumela wokuvuka kwezinto zokwenziwa kokosiko osuselwa ku-cements cements kungxube. Amandla acindezelayo namandla aguqukayo odaka azokwehla ngokwanda kokuqukethwe kwe-HPMC.

5. Amandla eBond

I-HPMC inethonya elikhulu ekusebenzeni kwebhondi ngodaka. I-HPMC yakha ifilimu ye-polymer enomthelela wokuvalwa kokubopha phakathi kohlelo lwesigaba soketshezi kanye nezinhlayiya zamanzi se-centydration, ezikhuthaza amanzi amaningi kwi-polymer film ngaphandle kosimende, ngaleyo ndlela ethuthukisa ikhwalithi ye-slurry. Amandla abondi alukhuni. Ngasikhathi sinye, engeza inani elifanele le-HPMC lithuthukisa i-plastity kanye nokuguquguquka kodaka, kunciphisa ukuqina kwendawo yokuguqula phakathi kosimende kanye nesibonisi se-substrate, bese kunciphisa amandla okuslayidi phakathi kwezindawo zokuxhumana. Ngokwezinga elithile, umphumela onobudlelwano phakathi kodaka kanye no-substrate uthuthukiswa. Ngaphezu kwalokho, ngenxa yokuba khona kwe-HPMC 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, udaka unamandla amakhulu obusolwa.