I-Hydroxyyethyl cellulose (HEC)yi-ether engenamanzi ye-cellulose ether, esetshenziswa kabanzi embonweni, izinto zokwakha, umuthi, amakhemikhali nsuku zonke nezinye izinkambu. Kodwa-ke, i-HEC inamanzi aphezulu we-solubility kanye ne-hydrophophobicity ebuthakathaka, engaholela ekulinganiselweni kokusebenza kwezinye izimo zohlelo lokusebenza. Ngakho-ke, i-hydrophobically Moshified hydroxyethyl celtule
1. Ukubaluleka kokuguqulwa kwe-hydrophobic kwe-hydroxyethyl cellulose
Ukuthuthukisa Ukuqina Kwezakhiwo Nezakhiwo Ze-Rheological
Ukuguqulwa kweHydrophobic kungathuthukisa kakhulu ikhono lokuqina lika-HEC, ikakhulukazi ngamanani aphansi we-shear. Kubonisa i-viscosity ephezulu, esiza ukuthuthukisa i-Thixotropy kanye ne-Pseudoplazicity yohlelo. Le mpahla ibaluleke kakhulu emikhakheni yezembatho, uketshezi lokumba lwamafutha, imikhiqizo yokunakekelwa komuntu, njll., Futhi ingathuthukisa ukuqina kanye nokusebenzisa umphumela womkhiqizo.
Thuthukisa ukuqina kwe-emulsion
Njengoba i-HEC eguquliwe ingakha isakhiwo esihlangene esikhaleni samanzi, ithuthukisa kakhulu ukuqina kwe-emulsion, kunganciphisa ukuhlukaniswa kwamanzi, futhi kuthuthukise umphumela we-emulsation. Ngakho-ke, inenani elikhulu lesicelo emikhakheni ye-Emulsion Coatings, imikhiqizo yokunakekelwa kwesikhumba kanye nama-emulsifers okudla.
Thuthukisa ukumelana kwamanzi kanye nezakhiwo ezenziwe ngefilimu
I-HEC yendabuko i-hydrophilic kakhulu futhi kalula incibilika ezindaweni eziphezulu zomswakama noma emanzini, okuthinta ukumelana kwamanzi okuqukethwe. Ngokuguqulwa kweHydrophobic, uhlelo lokusebenza lwayo ku-Coatings, anamathela, ukupaka kanye neminye imikhakha ingathuthukiswa, futhi ukumelana kwayo kwamanzi kanye nezakhiwo zokwakha amafilimu zingathuthukiswa.
Thuthukisa izakhiwo ezinciphayo ze-shear
I-HYDrophobic-Modified Hec inganciphisa ukubonakala ngaphansi kwezimo eziphakeme kakhulu, ngenkathi igcina ukuvumelana okuphezulu ezindaweni eziphansi ze-shear, ngaleyo ndlela yenza ngcono ukusebenza kokwakha kanye nokunciphisa ukusetshenziswa kwamandla. Inenani elibalulekile ezimbonini ezinjengezimayini ze-oilfield kanye nezembatho zezakhiwo.
2. Ukuguqulwa kwe-Hydrophobic kwe-hydroxyethyl cellulose
Ukuguqulwa kweHec Hydrophobic kuvame ukutholakala ngokwazisa amaqembu ama-hydrophobic ukulungisa i-solubity yayo kanye nokuqina kwezindawo ngokuxhunyelelwa kwamakhemikhali noma ukuguqulwa ngokomzimba. Izindlela ezijwayelekile zokuguqulwa kwe-Hydrophobic zimi ngokulandelayo:
I-Hydrophobic Group ixhumeka
Kwethulwa i-Alkyl (enjenge-hexadecyl), i-aryl (enjenge-Phenyl), i-siloxane noma amaqembu we-fluolinated ku-hec molecule ngokusebenzisa ukusabela kwamakhemikhali ukuthuthukisa i-hydrophobicity yayo. Ngokwesibonelo:
Kusetshenziswa ukusabalalisa noma ukusheshisa ukusabela ekuxhumeni i-ALKYL ende, efana ne-hexadecyl noma i-OCTYL, ukwakha isakhiwo esihlangene se-hydrophobic.
Kwethulwa amaqembu e-silicone ngokuguqulwa kwe-siloxane ukuthuthukisa ukumelana kwamanzi nokuthambisa.
Kusetshenziswa ukuguqulwa kwe-fluorination ukuthuthukisa ukumelana nesimo sezulu kanye ne-hydrophobicity, okwenza kube lula ukumboza okuphezulu noma izinhlelo zokusebenza ezikhethekile zemvelo.
I-Copolymerization noma ukuguqulwa okuxhumanisayo
Ngokwethula ama-comomonomonomers (afana ne-acrylates) noma ama-ejenti axhumanisa (njengama-epoxy resins) ukwakha inethiwekhi exhumanisa, ukumelana kwamanzi kanye nekhono lokuqina kwe-HEC lithuthukile. Isibonelo, usebenzisa i-HYDRDoPobily HEC eguquliwe kuma-polymer emulsions angathuthukisa ukuqina kanye nomphumela wokuqina we-emulsion.
Ukuguqulwa ngokomzimba
Kusetshenziswa ubuchwepheshe be-refface adsorption noma ubuchwepheshe be-coating, ama-molecule e-hydrophobic ahlanganiswe ebusweni be-hec ukwakha i-hydrophophobicity ethile. Le ndlela imnene futhi ilungele izinhlelo zokusebenza ezinezidingo eziphakeme zokuqina kwamakhemikhali, njengokudla nomuthi.
Ukuguqulwa Kwenhlangano Ye-Hydrophobic
Ngokwethula inani elincane lamaqembu we-hydrophobic ku-hec molecule, kwakha ukuhlangana okuhambisana nesisombululo esinamanzi, ngaleyo ndlela kuthuthukise ikhono lokuqina. Le ndlela isetshenziswa kabanzi ekwakhiweni kwezikhukhula ezisebenza kahle futhi ilungele izimbambo, amakhemikhali we-oilfield kanye nezinye izinkambu.
Ukuguqulwa kwe-hydrophobic kweIHydroxYethyl Cellulosekuyindlela ebalulekile yokuthuthukisa ukusebenza kwayo kohlelo lokusebenza, okungakhulisa amandla ayo okuqina, ukuqina kwe-emulsation, ukumelana kwamanzi kanye nezakhiwo ze-rheological. Izindlela ezijwayelekile zokuguqulwa zifaka i-hydrophobic group grafting, i-Copolymerization noma ukuguqulwa okuxhumanisayo, ukuguqulwa ngokomzimba kanye nokuguqulwa kwe-hydrophobic association. Ukukhetha okufanele kwezindlela zokuguqulwa kungandisa ukusebenza kwe-HEC ngokuya ngezidingo zohlelo lokusebenza ezahlukahlukene, ukuze zibambe iqhaza elikhulu emikhakheni eminingi njengezimbobo zezakhiwo, ukunakekelwa komuntu siqu, kanye nomuthi.
Isikhathi sePosi: Mar-25-2025