I-Hydroxyethyl Cellulose (HEC)iyi-ether ye-nonionic cellulose encibilikayo emanzini, esetshenziswa kakhulu ekwandeni, izinto zokwakha, imithi, amakhemikhali ansuku zonke kanye neminye imikhakha. Kodwa-ke, i-HEC inokunyibilika okuphezulu kwamanzi kanye ne-hydrophobicity ebuthakathaka, okungase kuholele emikhawulweni yokusebenza kwezinye izimo zohlelo lokusebenza. Ngakho-ke, i-hydrophobically modified hydroxyethyl cellulose (HMHEC) yaba khona ukuthuthukisa izakhiwo zayo ze-rheological, ikhono lokuqina, ukuqina kwe-emulsification kanye nokumelana namanzi.
1. Ukubaluleka kokuguqulwa kwe-hydrophobic kwe-hydroxyethyl cellulose
Ukuthuthukisa izakhiwo zokuqina kanye nezakhiwo ze-rheological
Ukuguqulwa kwe-Hydrophobic kungathuthukisa kakhulu ikhono lokujiya le-HEC, ikakhulukazi emazingeni aphansi okucheba. Ibonisa i-viscosity ephakeme, esiza ukuthuthukisa i-thixotropy kanye ne-pseudoplasticity yesistimu. Lesi sakhiwo sibaluleke kakhulu emkhakheni wezingubo zokumboza, uketshezi lokumba i-oilfield, imikhiqizo yokunakekelwa komuntu siqu, njll., futhi ingathuthukisa ukuzinza nokusebenzisa umphumela womkhiqizo.
Thuthukisa ukuzinza kwe-emulsion
Njengoba i-HEC eguquliwe ingakha isakhiwo sokuhlanganisa esixazululweni samanzi, ithuthukisa kakhulu ukuzinza kwe-emulsion, inganciphisa ukuhlukaniswa kwamanzi amafutha, futhi ithuthukise umphumela we-emulsification. Ngakho-ke, inenani elikhulu lesicelo emikhakheni ye-emulsion coatings, imikhiqizo yokunakekelwa kwesikhumba kanye nama-emulsifiers okudla.
Thuthukisa ukumelana namanzi kanye nezakhiwo zokwakha ifilimu
I-HEC yendabuko ine-hydrophilic kakhulu futhi inyibilika kalula ezindaweni ezinomswakama ophezulu noma emanzini, okuthinta ukumelana kwamanzi kwento. Ngokuguqulwa kwe-hydrophobic, ukusetshenziswa kwayo ekugqokeni, ekunamathiseleni, ekwenzeni iphepha kanye nezinye izinkambu kungathuthukiswa, futhi ukumelana kwawo kwamanzi kanye nezakhiwo zokwakha ifilimu kungathuthukiswa.
Thuthukisa izakhiwo zokugunda i-shear
I-HEC eguquliwe nge-Hydrophobic inganciphisa i-viscosity ngaphansi kwezimo eziphezulu ze-shear, kuyilapho igcina ukuvumelana okuphezulu emazingeni aphansi e-shear, ngaleyo ndlela ithuthukise ukusebenza kokwakhiwa nokunciphisa ukusetshenziswa kwamandla. Inenani elibalulekile ezimbonini ezifana nezimayini ze-oilfield kanye nezingubo zezakhiwo.
2. Ukuguqulwa kwe-Hydrophobic ye-hydroxyethyl cellulose
Ukuguqulwa kwe-HEC hydrophobic kuvame ukufezwa ngokwethula amaqembu e-hydrophobic ukuze alungise ukuncibilika kwawo kanye nezakhiwo ezishubile ngokuxhunyelelwa kwamakhemikhali noma ukuguqulwa komzimba. Izindlela ezijwayelekile zokuguqula i-hydrophobic yilezi ezilandelayo:
Ukuxhunyelelwa kweqembu le-Hydrophobic
Sethula i-alkyl (efana ne-hexadecyl), i-aryl (efana ne-phenyl), i-siloxane noma amaqembu ane-fluorinated ku-molecule ye-HEC ngokusabela kwamakhemikhali ukuze kuthuthukiswe i-hydrophobicity yayo. Ngokwesibonelo:
Ukusebenzisa i-esterification noma ukusabela kwe-etherification ekuxhumeni i-alkyl yochungechunge olude, njenge-hexadecyl noma i-octyl, ukwakha isakhiwo esihlanganisa i-hydrophobic.
Sethula amaqembu e-silicone ngokuguqulwa kwe-siloxane ukuze kuthuthukiswe ukumelana namanzi nokuthambisa kwawo.
Ukusebenzisa ukuguqulwa kwe-fluorination ukuze kuthuthukiswe ukumelana nesimo sezulu kanye ne-hydrophobicity, okuyenza ifanelekele ukumbozwa okuphezulu noma izinhlelo zokusebenza ezikhethekile zemvelo.
I-Copolymerization noma ukuguqulwa kokuxhumanisa
Ngokwethula ama-comonomers (njengama-acrylates) noma ama-agent axhumanisa (njengama-epoxy resins) ukuze enze inethiwekhi yokuxhumanisa, ukumelana kwamanzi nekhono lokuqina le-HEC liyathuthukiswa. Isibonelo, ukusebenzisa i-HEC eguquliwe nge-hydrophobically kuma-emulsions e-polymer kungathuthukisa ukuzinza nomphumela wokuqina we-emulsion.
Ukuguqulwa komzimba
Ukusebenzisa i-adsorption surface noma ubuchwepheshe bokumboza, ama-molecule e-hydrophobic ahlanganiswe ebusweni be-HEC ukuze akhe i-hydrophobicity ethile. Le ndlela imnene futhi ilungele ukusetshenziswa okunezidingo eziphezulu zokuzinza kwamakhemikhali, njengokudla nemithi.
Ukuguqulwa kwe-Hydrophobic association
Ngokwethula inani elincane lamaqembu e-hydrophobic ku-molecule ye-HEC, yakha i-associative aggregate kwisisombululo samanzi, ngaleyo ndlela ithuthukise ikhono lokuqina. Le ndlela isetshenziswa kabanzi ekuthuthukisweni kwama-thickeners aphezulu futhi ifanele ukumbozwa, amakhemikhali e-oilfield nezinye izinkambu.
Ukuguqulwa kwe-Hydrophobici-hydroxyethyl cellulosekuyindlela ebalulekile yokuthuthukisa ukusebenza kwayo kwesicelo, okungathuthukisa ikhono layo lokuqina, ukuzinza kwe-emulsification, ukumelana namanzi kanye nezakhiwo ze-rheological. Izindlela zokuguqulwa ezivamile zihlanganisa i-hydrophobic group grafting, i-copolymerization noma ukuguqulwa kokuxhumanisa, ukuguqulwa komzimba kanye nokuguqulwa kwe-hydrophobic association. Ukukhetha okunengqondo kwezindlela zokuguqula kungathuthukisa ukusebenza kwe-HEC ngokwezidingo ezihlukene zohlelo lokusebenza, ukuze ibambe iqhaza elikhulu emikhakheni eminingi efana nezingubo zezakhiwo, amakhemikhali e-oilfield, ukunakekelwa komuntu siqu, kanye nemithi.
Isikhathi sokuthumela: Mar-25-2025