1. Uhlolojikelele lwenkinga
I-Hydroxyethyl cellulose (HEC)i-thickener kanye ne-rheology modifier esetshenziswa kakhulu kupende we-latex, engathuthukisa i-viscosity, ukulinganisa kanye nokuzinza kwesitoreji sikapende. Kodwa-ke, ekusebenzeni okungokoqobo, i-HEC ngezinye izikhathi iqala ukwenza amakristalu, okuthinta ukubukeka, ukusebenza kokwakhiwa kanye nokuzinza kwesitoreji sikapende.
2. Ukuhlaziywa kwezimbangela zokwakheka kwekristalu
Ukuhlakazeka okunganele: Ukuhlakazwa kwe-HEC emanzini kudinga izimo ezithile ezinyakazayo kanye nesikhathi. Ukuncibilika okunganele kungaholela ekugcwaleni kwendawo, ngaleyo ndlela kwakhe imvula ecwebezelayo.
Inkinga yekhwalithi yamanzi: Ukusebenzisa amanzi aqinile noma amanzi anokungcola okwengeziwe kuzobangela i-HEC ukuthi isabele ngama-ion ensimbi (afana ne-Ca²⁺, Mg²⁺) ukuze yakhe izimvula ezingancibiliki.
Ifomula engazinzile: Ezinye izithasiselo kufomula (ezifana nezilondolozi, izisabalalisi) zingase zisabele ngokungahambisani ne-HEC, ziyibangele imvula futhi yakhe amakristalu.
Izimo ezingalungile zokugcina: Izinga lokushisa elidlulele noma isitoreji sesikhathi eside singabangela i-HEC ukuba iphinde icwebeze noma ifinyele, ikakhulukazi ezindaweni ezishisayo nezinomswakama ophezulu.
Inani le-pH liyashintsha: I-HEC iyazwela ku-pH, futhi izindawo ezine-acidic ngokwedlulele noma ezine-alkaline zingase zicekele phansi ibhalansi yayo yokuncibilika futhi zidale imvula eyikristalu.
3. Izixazululo
Ukuphendula lezi zinkinga ezingenhla, izinyathelo ezilandelayo zingathathwa ukuze kugwenywe noma kuncishiswe isenzakalo se-HEC esikhiqiza amakristalu ngopende we-latex:
Lungiselela indlela yokuqedwa ye-HEC
Sebenzisa indlela yangaphambi kokuhlakazwa: qala ufafaze kancane i-HEC emanzini ngaphansi kokunyakaziswa kwesivinini esiphansi ukuze ugweme ukuhlangana okubangelwa ukufaka okuqondile; bese uyiyeka ime imizuzu engaphezu kwengu-30 ukuze uyimanzise ngokugcwele, futhi ekugcineni uyishukumise ngesivinini esikhulu ize incibilike ngokuphelele.
Sebenzisa indlela yokuchithwa kwamanzi ashisayo: ukuncibilikisa i-HEC emanzini afudumele ku-50-60 ℃ kungasheshisa inqubo yokuhlakaza, kodwa kugweme izinga lokushisa eliphezulu kakhulu (ngaphezu kuka-80℃), ngaphandle kwalokho kungase kubangele ukuwohloka kwe-HEC.
Sebenzisa ama-co-solvents afanelekile, njengenani elincane le-ethylene glycol, i-propylene glycol, njll., ukuze ukhuthaze ukuqedwa kweyunifomu ye-HEC nokunciphisa i-crystallization ebangelwa ukugxila kwendawo ngokweqile.
Thuthukisa izinga lamanzi
Sebenzisa amanzi enziwe i-deionized noma amanzi athambekele esikhundleni samanzi kampompi ajwayelekile ukuze unciphise ukuphazamiseka kwama-ion ensimbi.
Ukwengeza inani elifanele le-ejenti ye-chelating (efana ne-EDTA) kufomula kapende we-latex kungamisa isixazululo ngempumelelo futhi kuvimbele i-HEC ukuthi isabele ngama-ion ensimbi.
Lungiselela idizayini yefomula
Gwema izithasiselo ezingahambelani ne-HEC, njengezilondolozi ezithile ezinosawoti omningi noma izihlanzi ezithile ezithile. Kunconywa ukwenza ukuhlolwa kokuhambisana ngaphambi kokusetshenziswa.
Lawula inani le-pH likapende we-latex phakathi kuka-7.5-9.0 ukuze uvimbele i-HEC ekumeni ngenxa yokuguquguquka okukhulu kwe-pH.
Lawula izimo zokugcina
Indawo yokugcina kapende we-latex kufanele igcine izinga lokushisa elimaphakathi (5-35℃) futhi igweme izindawo ezihlala isikhathi eside eziphakeme noma eziphansi.
Kugcine kuvaliwe ukuze uvimbele ukuhwamuka komswakama noma ukungcoliswa, gwema ukwanda kwendawo ekugxilweni kwe-HEC ngenxa yokuguquguquka kwe-solvent, futhi ukhuthaze ukuqina kwekristalu.
Khetha uhlobo olufanele lwe-HEC
Izinhlobo ezahlukene ze-HEC zinomehluko ekuncibilikeni, i-viscosity, njll. Kunconywa ukukhetha i-HEC enezinga eliphezulu lokushintshwa kanye ne-viscosity ephansi ukuze kuncishiswe ukuthambekela kwayo kokucwebezela ekugxilweni okuphezulu.
Ngokulungiselela imodi yokuqedwa yeI-HEC, ukuthuthukisa ikhwalithi yamanzi, ukulungisa ifomula, ukulawula indawo yokugcina isitoreji nokukhetha izinhlobonhlobo ezifanele ze-HEC, ukwakheka kwamakristalu epende ye-latex kungagwenywa ngokuphumelelayo noma kuncishiswe, ngaleyo ndlela kuthuthukiswe ukuzinza nokusebenza kokwakhiwa kopende we-latex. Enqubweni yangempela yokukhiqiza, ukulungiswa okuhlosiwe kufanele kwenziwe ngokuya ngezimo ezithile ukuze kuqinisekiswe ikhwalithi yomkhiqizo nolwazi lomsebenzisi.
Isikhathi sokuthumela: Mar-26-2025