I-Hydroxyethyl Cellulose (HEC)yi-ether ye-cellulose enganyangekiyo emanzini, esetyenziswa kakhulu kwiingubo, kwizixhobo zokwakha, kumayeza, kwiikhemikhali zemihla ngemihla nakwezinye iindawo. Nangona kunjalo, i-HEC inokunyibilika kwamanzi okuphezulu kunye nokungakhathali kakuhle kwamanzi, oku kunokukhokelela kwimida yokusebenza kwezinye iimeko zokusetyenziswa. Ke ngoko, i-hydroxyethyl cellulose eguqulwe ngamanzi (HMHEC) yavela ukuze iphucule iipropati zayo ze-rheological, amandla okutyeba, uzinzo lwe-emulsification kunye nokumelana namanzi.
1. Ukubaluleka kokuguqulwa kwe-hydroxyethyl cellulose kwi-hydroxyophobic
Ukuphucula iipropati zokutyeba kunye neepropati ze-rheological
Ukuguqulwa kwe-hydrophobic kunokuphucula kakhulu amandla okuqina kwe-HEC, ingakumbi xa i-shear rates iphantsi. Ibonisa i-viscosity ephezulu, enceda ukuphucula i-thixotropy kunye ne-pseudoplasticity yenkqubo. Le propati ibaluleke kakhulu kwiinkalo zokugquma, ulwelo lokubhola i-oyile, iimveliso zokhathalelo lomntu, njl.njl., kwaye inokuphucula uzinzo kunye nefuthe lokusetyenziswa kwemveliso.
Phucula uzinzo lwe-emulsion
Ekubeni i-HEC eguquliweyo inokwenza isakhiwo esidibeneyo kwisisombululo samanzi, iphucula kakhulu uzinzo lwe-emulsion, inokunciphisa ukwahlukana kweoyile namanzi, kwaye iphucule isiphumo se-emulsification. Ke ngoko, inexabiso elikhulu lokusetyenziswa kwiindawo zokugquma i-emulsion, iimveliso zokhathalelo lolusu kunye ne-emulsifiers yokutya.
Ukuphucula ukumelana namanzi kunye neempawu zokwenza ifilimu
I-HEC yendabuko ithambile kakhulu emanzini kwaye inyibilika lula kwiindawo ezinomswakama ophezulu okanye emanzini, nto leyo echaphazela ukumelana kwamanzi kwezinto. Ngokusebenzisa utshintsho olungenamanzi, ukusetyenziswa kwayo kwiingubo, izinto zokuncamathelisa, ukwenza iphepha kunye nezinye iindawo kunokuphuculwa, kwaye ukumelana kwayo namanzi kunye neempawu zokwenza ifilimu zinokuphuculwa.
Phucula iipropati zokunciphisa ukucheba
I-HEC eguqulwe nge-hydrophobic inokunciphisa i-viscosity phantsi kweemeko zokucheba eziphezulu, ngelixa igcina ukuhambelana okuphezulu kumanqanaba aphantsi okucheba, ngaloo ndlela iphucula ukusebenza kolwakhiwo kwaye inciphise ukusetyenziswa kwamandla. Ixabiseke kakhulu kumashishini afana nokwembiwa kwe-oyile kunye nokufakwa kwepeyinti yezakhiwo.
2. Ukuguqulwa kwe-hydroxyethyl cellulose ephobisayo kwi-hydroxyethyl cellulose
Ukuguqulwa kwe-HEC hydrophobic kudla ngokufezekiswa ngokungenisa amaqela e-hydrophobic ukulungisa ukunyibilika kwayo kunye neempawu zokutyeba ngokusebenzisa i-grafting yeekhemikhali okanye ukuguqulwa komzimba. Iindlela eziqhelekileyo zokuguqulwa kwe-hydrophobic zezi zilandelayo:
Ukufakelwa kweqela elinoloyiko lokusebenzisa amanzi
Ukwazisa i-alkyl (efana ne-hexadecyl), i-aryl (efana ne-phenyl), i-siloxane okanye amaqela e-fluorinated kwi-molecule ye-HEC ngokusebenzisa i-chemical reaction ukuphucula i-hydrophobicity yayo. Umzekelo:
Ukusebenzisa i-esterification okanye i-etherification reaction kwi-graft long-chain alkyl, efana ne-hexadecyl okanye i-octyl, ukwenza isakhiwo esinxulumene ne-hydrophobic.
Ukwazisa amaqela e-silicone ngokuguqulwa kwe-siloxane ukuphucula ukumelana kwayo namanzi kunye nokuthamba kwayo.
Ukusebenzisa utshintsho lwe-fluorination ukuphucula ukumelana nemozulu kunye nokungabandakanywa kwamanzi, okwenza ukuba ifaneleke kwiingubo eziphezulu okanye ukusetyenziswa okukhethekileyo kokusingqongileyo.
Ukuguqulwa kweCopolymerization okanye ukudityaniswa kwee-cross-linking
Ngokungenisa ii-comonomers (ezifana nee-acrylates) okanye ii-agents ezidibanisa i-cross-linking (ezifana nee-epoxy resins) ukwenza inethiwekhi edibanisa i-cross-linking, ukumelana namanzi kunye nokukwazi ukujiya kwe-HEC kuyaphuculwa. Umzekelo, ukusebenzisa i-hydrophobically modified HEC kwi-polymer emulsions kunokuphucula uzinzo kunye nesiphumo sokujiya kwe-emulsion.
Uhlengahlengiso lomzimba
Ngokusebenzisa iteknoloji yokufunxa okanye yokugquma umphezulu, iimolekyuli ezingafuni manzi zigqunywe kumphezulu we-HEC ukuze zenze i-hydrophobicity ethile. Le ndlela ithambile kwaye ifanelekile ukusetyenziswa ngeemfuno eziphezulu zokuzinza kweekhemikhali, njengokutya namayeza.
Uhlengahlengiso lonxulumano olubangelwa kukungathandi amanzi
Ngokungenisa inani elincinci lamaqela angaphobiyo kwimolekyuli ye-HEC, yenza i-associative aggregate kwisisombululo samanzi, ngaloo ndlela iphucula amandla okuqina. Le ndlela isetyenziswa kakhulu ekuphuhlisweni kwezinto ezithinayo ezisebenza kakhulu kwaye ifanelekile kwiingubo, iikhemikhali ze-oyile kunye nezinye iindawo.
Utshintsho lwe-Hydrophobici-hydroxyethyl celluloseyindlela ebalulekileyo yokuphucula ukusebenza kwayo, enokuphucula amandla ayo okuqina, uzinzo lwe-emulsification, ukumelana namanzi kunye neempawu ze-rheological. Iindlela eziqhelekileyo zokuguqula ziquka ukufakelwa kweqela le-hydrophobic, ukuguqulwa kwe-copolymerization okanye i-cross-linking, ukuguqulwa komzimba kunye nokuguqulwa komanyano lwe-hydrophobic. Ukukhetha okufanelekileyo kweendlela zokuguqula kunokuphucula ukusebenza kwe-HEC ngokweemfuno ezahlukeneyo zokusetyenziswa, ukuze idlale indima enkulu kwiinkalo ezininzi ezifana nokufakwa kwezakhiwo, iikhemikhali ze-oyile, ukhathalelo lomntu, kunye namayeza.
Ixesha leposi: Matshi-25-2025