I-cellulose etherukugcinwa kwamanzi
Ukugcinwa kwamanzi kodaka kubhekisela emandleni odaka ukubamba nokukhiya amanzi. Ukuphakama kwe-viscosity ye-cellulose ether, kuba ngcono ukugcinwa kwamanzi. Ngenxa yokuthi isakhiwo se-cellulose siqukethe ibhondi ye-hydroxyl ne-ether, i-hydroxyl ne-ether bond yeqembu lama-athomu omoya-mpilo nama-molecule wamanzi ukuze kuhlanganiswe ibhondi ye-hydrogen, ukuze amanzi amahhala abe emanzini abophayo, amanzi asongayo, ukuze adlale indima yokugcina amanzi.
Ukuncibilika kwe-cellulose ether
1. I-coarser cellulose ether kulula ukuyihlakaza emanzini ngaphandle kwe-agglomerating, kodwa izinga lokuchithwa lihamba kancane kakhulu. I-cellulose ether engaphansi kwama-60 mesh ichithwa emanzini cishe imizuzu engama-60.
2. Izinhlayiya ezinhle ze-cellulose ether emanzini kulula ukuzihlakaza hhayi i-agglomerate, futhi izinga lokuhlakazeka lilinganiselwe. I-cellulose ether engaphezu kuka-80 mesh encibilike emanzini cishe imizuzu emi-3.
3. I-Ultrafine cellulose ether ihlakazeka ngokushesha emanzini, incibilike ngokushesha futhi yakhe i-viscosity esheshayo. I-cellulose ether engaphezu kwe-120 mesh ichithwa emanzini cishe imizuzwana engu-10-30.
Uma izinhlayiya ze-cellulose ether zicoleka, kuba ngcono ukugcina amanzi, izinhlayiya ezimahhadla ze-cellulose ether kanye nendawo ethintana namanzi zincibilika ngokushesha futhi zenze into yejeli. Iglu igoqa izinto ukuvimbela ama-molecule amanzi ukuthi angaqhubeki nokungena. Ngezinye izikhathi, ngisho noma inyakaziswa isikhathi eside, isixazululo asikwazi ukuhlakazeka ngokulinganayo futhi sihlakazwe, sakhe isixazululo se-flocculent enodaka noma i-agglomerate. Izinhlayiya ezinhle zihlakazeka futhi zincibilike ngokushesha lapho zithintana namanzi ukuze zenze i-viscosity efanayo.
PH inani le-cellulose ether (ukuqina okubambezelekile noma amandla okuqala)
Inani le-PH labakhiqizi be-cellulose ether ekhaya naphesheya ngokuyisisekelo lilawulwa cishe ku-7, eline-acidic. Ngenxa yokuthi kusenesakhiwo esiningi sendandatho ye-glucose engenamanzi esakhiweni samangqamuzana e-cellulose ether, indandatho ye-glucose ephelelwe amanzi iyiqembu eliyinhloko elibangela ukubambezeleka kukasimende. Indandatho ye-glucose ephelelwe amanzi emzimbeni ingenza i-calcium ion kusisombululo sikasimende hydration yakha i-sugar calcium molecular compounds, inciphise ukuhlushwa kwe-calcium ion esikhathini sokungeniswa kwe-cement hydration, ivimbele ukwakheka kanye nemvula yamakristalu e-calcium hydroxide kanye ne-calcium kasawoti, ngaleyo ndlela ibambezele inqubo kasimende hydration. Uma inani elingu-PH liba yisimo se-alkaline, udaka luzovela isimo samandla sangaphambi kwesikhathi. Manje amafektri amaningi ukulungisa inani le-PH usebenzisa i-sodium carbonate, i-sodium carbonate iwuhlobo lokusheshisa i-ejenti, i-sodium carbonate ingathuthukisa ukusebenza kwezinhlayiya ze-samente, ibangele ukuhlangana phakathi kwezinhlayiya ukwanda, ithuthukise ngokwengeziwe i-viscosity ye-slurry, udaka kanye ne-sodium carbonate ne-calcium ion kwakwakhe ngokushesha, kwabangela ukwakheka kwe-condenation ngokushesha, ukwakheka kwe-ettringite. Ngakho-ke, inani le-PH kufanele lilungiswe ngokuya ngamakhasimende ahlukene kunqubo yokukhiqiza yangempela.
Ukufakwa kwegesi ye-cellulose ether
Ukufakwa komoya kwe-cellulose ether kungenxa yokuthi i-cellulose ether iphinde ibe yi-surfactant, umsebenzi wesixhumi esibonakalayo se-cellulose ether wenziwa ikakhulukazi kusixhumi esibonakalayo esiqinile se-gas-liquid, okokuqala ukwethulwa kwamabhamuza, okulandelwa ukuhlakazeka nokumanzisa. I-Cellulose ether iqukethe iqembu le-alkyl, inciphisa kakhulu ukungezwani komhlaba kanye namandla ahlanganayo emanzini, isixazululo samanzi enkambweni yokuyaluza kulula ukukhiqiza amabhamuza amaningi amancane avaliwe.
Ukufakwa kwe-cellulose ether
I-cellulose ether encibilikisiwe odakeni ngenxa yochungechunge lwamangqamuzana e-methoxy ne-hydroxypropyl ku-slurry ene-calcium ions kanye ne-aluminium ions ekwakheni ijeli ye-viscous futhi igcwaliswe igebe lodaka lukasimende, ithuthukise ukuminyana kodaka, idlale indima yokugcwalisa okuguquguqukayo nokuqinisa. Kodwa-ke, lapho i-matrix eyinhlanganisela icindezelwa, i-polymer ayikwazi ukudlala ukwesekwa okuqinile, ngakho-ke amandla nokucindezelwa kwesilinganiso sodaka kuyancipha.
Ukwakhiwa kwefilimu yei-cellulose ether
Ifilimu elincane le-latex lakhiwa phakathi kwe-cellulose ether kanye nezinhlayiya zikasimende ngemva kokufakwa kwamanzi. Ifilimu inomphumela wokuvala futhi ithuthukisa isimo esomile esingaphezulu kodaka. Ngenxa yokuthi i-cellulose ether inokugcinwa kwamanzi okuhle, igcina ama-molecule amanzi anele ngaphakathi kodaka, ngaleyo ndlela iqinisekise amandla okuqina kukasimende nokuqina nokuthuthukiswa ngokuphelele, ithuthukise amandla okubopha udaka, ngesikhathi esifanayo ithuthukise ukunamathela kukasimende nosimende, udaka lunepulasitiki enhle nokuqina, ukunciphisa ukuguquguquka kodaka.
Isikhathi sokuthumela: Apr-26-2024