Iselulosi yeHydroxyethyl (HEC)i-ether ye-cellulose ye-nonionic e-soluble yamanzi, esetyenziswa ngokubanzi kwiingubo, izinto zokwakha, amayeza, iikhemikhali zemihla ngemihla kunye nezinye iindawo. Nangona kunjalo, i-HEC ine-solubility ephezulu yamanzi kunye ne-hydrophobicity ebuthathaka, enokukhokelela ekunciphiseni ukusebenza kwezinye iimeko zesicelo. Ke ngoko, i-hydrophobically modified hydroxyethyl cellulose (HMHEC) yavela ukuze iphucule iipropathi zayo zerheological, amandla okuqina, ukuzinza kwe-emulsification kunye nokumelana namanzi.
1. Ukubaluleka kokuguqulwa kwe-hydrophobic ye-hydroxyethyl cellulose
Ukuphucula iipropati ezityebileyo kunye neempawu ze-rheological
Ukuguqulwa kwe-Hydrophobic kunokuphucula ngokubonakalayo ukukwazi ukujiya kwe-HEC, ngakumbi kumazinga aphantsi okucheba. Ibonisa i-viscosity ephezulu, enceda ukuphucula i-thixotropy kunye ne-pseudoplasticity yenkqubo. Le propati ibaluleke kakhulu kwiinkalo zeengubo, i-oilfield drilling fluids, iimveliso zokunakekelwa komntu, njl., kwaye inokuphucula ukuzinza kunye nokusetyenziswa kwesiphumo semveliso.
Ukuphucula ukuzinza kwe-emulsion
Ekubeni i-HEC elungisiweyo inokwenza i-associative structure kwisisombululo samanzi, iphucula kakhulu ukuzinza kwe-emulsion, inokunciphisa ukuhlukana kwamanzi oyile, kunye nokuphucula umphumo we-emulsification. Ngoko ke, inexabiso elikhulu lesicelo kwiinkalo ze-emulsion coatings, iimveliso zokunakekelwa kwesikhumba kunye ne-emulsifiers yokutya.
Ukuphucula ukuxhathisa kwamanzi kunye neempawu zokwenza ifilimu
I-HEC yendabuko i-hydrophilic ephezulu kwaye i-soluble ngokulula kwiindawo zokufuma eziphezulu okanye emanzini, okuchaphazela ukuxhathisa kwamanzi kwizinto eziphathekayo. Ngokusebenzisa ukuguqulwa kwe-hydrophobic, ukusetyenziswa kwayo kwiingubo, ukunamathela, ukwenza iphepha kunye nezinye iindawo zingaphuculwa, kwaye ukuchasana kwamanzi kunye neepropati zokwenza ifilimu kunokuphuculwa.
Ukuphucula iimpawu zokucheba zokucheba
I-Hydrophobic-modified HEC inokunciphisa i-viscosity phantsi kweemeko eziphezulu zokucheba, ngelixa igcina ukuhambelana okuphezulu kumazinga aphantsi okucheba, ngaloo ndlela iphucula ukusebenza kokwakhiwa kunye nokunciphisa ukusetyenziswa kwamandla. Inexabiso elibalulekileyo kumashishini afana nemigodi yeoli kunye neengubo zokwakha.
2. Ukuguqulwa kwe-Hydrophobic ye-hydroxyethyl cellulose
I-HEC yokuguqulwa kwe-hydrophobic idla ngokufezekiswa ngokuzisa amaqela e-hydrophobic ukulungelelanisa ukunyibilika kwayo kunye neempawu zokuqina ngokuxutywa kweekhemikhali okanye ukuguqulwa komzimba. Iindlela eziqhelekileyo zokuguqulwa kwe-hydrophobic zezi zilandelayo:
Ukuxhunyelelwa kweqela leHydrophobic
Ukwazisa i-alkyl (efana ne-hexadecyl), i-aryl (efana ne-phenyl), i-siloxane okanye amaqela e-fluorinated kwi-molecule ye-HEC ngokuphendula kweekhemikhali ukuphucula i-hydrophobicity yayo. Umzekelo:
Ukusebenzisa i-esterification okanye ukusabela kwe-etherification kwi-alkyl ye-alkyl emide, efana ne-hexadecyl okanye i-octyl, ukwenza i-hydrophobic association structure.
Ukwazisa amaqela e-silicone ngokuguqulwa kwe-siloxane ukuphucula ukuxhathisa kwamanzi kunye nokuthambisa.
Ukusebenzisa ukuguqulwa kwe-fluorination ukuphucula ukuchasana kwemozulu kunye ne-hydrophobicity, okwenza ukuba ifaneleke kwiingubo eziphakamileyo eziphezulu okanye izicelo ezikhethekileyo zokusingqongileyo.
I-Copolymerization okanye ukuguqulwa kwe-cross-linking
Ngokuzisa i-comonomers (ezifana ne-acrylates) okanye i-agent edibeneyo (efana ne-epoxy resins) ukwenza i-network-linking network, ukuxhathisa kwamanzi kunye nekhono lokuqina kwe-HEC kuphuculwe. Ngokomzekelo, ukusebenzisa i-HEC eguqulelwe nge-hydrophobically kwi-emulsions ye-polymer inokunyusa ukuzinza kunye nokuqina kwesiphumo se-emulsion.
Ukuguqulwa komzimba
Ukusebenzisa i-adsorption surface okanye iteknoloji yokugqoka, iimolekyuli ze-hydrophobic zifakwe kwi-HEC ukuze zenze i-hydrophobicity ethile. Le ndlela inobulali kwaye ifanelekile kwizicelo ezineemfuno eziphezulu zokuzinza kweekhemikhali, ezifana nokutya kunye namayeza.
Ukuguqulwa kwe-Hydrophobic association
Ngokuzisa inani elincinci lamaqela e-hydrophobic kwi-molecule ye-HEC, yenza i-associative aggregate kwisisombululo samanzi, ngaloo ndlela iphucula amandla okuqina. Le ndlela isetyenziswa ngokubanzi ekuphuhliseni i-high-performance thickeners kwaye ifanelekile kwiingubo, iikhemikhali ze-oilfield kunye nezinye iindawo.
Ukuguqulwa kweHydrophobic yei-hydroxyethyl celluloseyindlela ebalulekileyo yokuphucula ukusebenza kwayo kwesicelo, enokuthi ikhulise isakhono sayo sokutyeba, ukuzinza kwe-emulsification, ukuxhathisa kwamanzi kunye neempawu ze-rheological. Iindlela zokuguqulwa eziqhelekileyo ziquka i-hydrophobic group grafting, i-copolymerization okanye ukuguqulwa kwe-cross-linking, ukuguqulwa komzimba kunye nokuguqulwa kwe-hydrophobic association. Ukukhethwa ngokufanelekileyo kweendlela zokuguqulwa kunokwandisa ukusebenza kwe-HEC ngokweemfuno ezahlukeneyo zesicelo, ukwenzela ukuba udlale indima enkulu kwiinkalo ezininzi ezifana neengubo zezakhiwo, iikhemikhali ze-oilfield, ukunakekelwa komntu kunye neyeza.
Ixesha lokuposa: Mar-25-2025