Indlela yokuqina ye-hydroxyethyl celtulose ukwandisa i-viscosity ngokusebenzisa ukwakheka kwama-hydrogen bond ama-hydrogen, kanye ne-hydration kanye ne-chain. Ngakho-ke, indlela yokuqina ye-hydroxyethyl celtulese ingahlukaniswa izici ezimbili: Indima eyodwa yezibopho ze-hydrogen kanye ne-intramolecular hydrogen. I-Hydrophobic Main Chain Associates nama-molecule wamanzi azungezile ngama-hydrogen bond, athuthukisa uketshezi lwe-polymer uqobo. Ivolumu yezinhlayiya inciphisa isikhala sokunyakaza kwamahhala kwezinhlayiya, ngaleyo ndlela kwandise ukubonwa kohlelo; Okwesibili, ngokusebenzisa ukufakwa kanye nokugqashula kwamaketanga amamolekyuli, amaketanga we-cellulose akwisakhiwo senethiwekhi enezici ezintathu kulo lonke uhlelo, ngaleyo ndlela enze ngcono ukubonakala.
Ake sibheke ukuthi i-cellulose idlala indima kanjani ekuqineni kwesitoreji kohlelo: okokuqala, indima yama-hydrogen bond ikhawulela ukugeleza kwamanzi mahhala, idlala indima ekugcinweni kwamanzi, futhi inomthelela ekuvinjelweni kokuhlukaniswa kwamanzi; Okwesibili, ukuxhumana kweCellulose Chains I-Lap Embaelment yakha inethiwekhi exhumeke kahle noma indawo ehlukile phakathi kwemibala, ama-filler kanye nezinhlayiya ze-emulsion, ezivimba ukuhlanza.
Kuyinhlanganisela yalezi zindlela ezimbili ezingenhla zesenzo ezenza amandla i-hydroxyethyl cellulose ukuba nekhono elihle kakhulu lokuthuthukisa ukuqina kwesitoreji. Ekukhiqizeni upende we-latex, i-HEC ingezwe ngesikhathi sokushaya nokusabalalisa ukwanda ngokwanda kwamandla angaphandle, ama-moleculity velocity gradient, okulula ukugcwala, okulula ukushelela, okulula ukushelela. Njengoba uhlelo luqukethe inani elikhulu lezinye izakhi (imibala, ama-filler, ama-emulsions), leli lungiselelo elihlelekile alikwazi ukubuyisela isimo esibangelwe sokuxhumanisa nokukhanda noma ngabe sibekwe isikhathi eside ngemuva kokuthi upende uhlanganiswe. Kulokhu, i-HEC ithembela kuphela kuma-hydrogen bond. Umphumela wokugcinwa kwamanzi nokuqina kunciphisa ukusebenza kahle kwe-HEC, kanye negalelo lalesi simo sokuhlakazeka ekuzinzisweni kwesitoreji kuncishisiwe ngokufanele. Kodwa-ke, i-hec encibilikisiwe yayihlakazwa ngendlela efanayo ohlelweni ngesivinini esisezingeni eliphansi ngesikhathi sokuvuselela, futhi isakhiwo senethiwekhi esakhiwa ngokuxhumeka kwamaketanga amakhethini we-HEC asilonakalisiwe. Ngaleyo ndlela ekhombisa ukusebenza kahle okuphezulu nokuqina kwesitoreji. Ngokusobala, isenzo ngasikhathi sinye sezindlela ezimbili ezinkulu yisisekelo sokuqina okusebenzayo kweselula nokuqinisekisa ukuqina kokugcina. Ngamanye amagama, isimo se-cellulose esichithiwe futhi esihlakazekile sithinta kakhulu umphumela waso wokuqina kanye negalelo laso ukuqina kokugcina.
Isikhathi sePosi: Nov-02-2022