Hydroxyethyl Cellulose (HEC)ke nonionic cellulose ether e qhibilihang ka metsing, e sebelisoang haholo ho roala, thepa ea mohaho, meriana, lik'hemik'hale tsa letsatsi le letsatsi le masimo a mang. Leha ho le joalo, HEC e na le metsi a mangata a ho qhibiliha le hydrophobicity e fokolang, e ka lebisang mefokolong ea ts'ebetso maemong a mang a kopo. Ka hona, hydrophobically modified hydroxyethyl cellulose (HMHEC) e ile ea e-ba teng ho ntlafatsa thepa ea eona ea rheological, bokhoni ba ho teteka, botsitso ba emulsification le ho hanyetsa metsi.
1. Bohlokoa ba phetoho ea hydrophobic ea hydroxyethyl cellulose
Ho ntlafatsa thepa ea thickening le thepa ea rheological
Phetoho ea Hydrophobic e ka ntlafatsa haholo bokhoni ba botenya ba HEC, haholoholo ka litheko tse tlase tsa ho kuta. E bonts'a viscosity e phahameng, e thusang ho ntlafatsa thixotropy le pseudoplasticity ea tsamaiso. Thepa ena ke ea bohlokoa ka ho khetheha masimong a ho roala, maro a ho cheka sebakeng sa oli, lihlahisoa tsa tlhokomelo ea motho, joalo-joalo, 'me a ka ntlafatsa botsitso le ts'ebeliso ea sehlahisoa.
Ntlafatsa botsitso ba emulsion
Kaha HEC e fetotsoeng e ka theha mohaho oa ho kopanya ka tharollo ea metsi, e ntlafatsa haholo botsitso ba emulsion, e ka fokotsa ho arohana ha metsi a oli, le ho ntlafatsa phello ea emulsification. Ka hona, e na le bohlokoa bo boholo ba ts'ebeliso masimong a ho roala emulsion, lihlahisoa tsa tlhokomelo ea letlalo le li-emulsifiers tsa lijo.
Ntlafatsa ho hanyetsa metsi le thepa ea ho etsa filimi
Traditional HEC e na le hydrophilic haholo mme e qhibiliha habonolo libakeng tse mongobo o phahameng kapa metsing, e amang ho hanyetsa metsi ha thepa. Ka phetoho ea hydrophobic, ts'ebeliso ea eona ea ho roala, likhomaretsi, ho etsa pampiri le masimo a mang e ka ntlafatsoa, 'me ho hanyetsa metsi le thepa ea ho etsa lifilimi ho ka ntlafatsoa.
Ntlafatsa thepa ea ho kuta moriri
HEC e fetotsoeng ka Hydrophobic e ka fokotsa viscosity tlas'a maemo a phahameng a ho kuta, ha e ntse e boloka botsitso bo phahameng ka litekanyetso tse tlaase tsa ho kuta, kahoo e ntlafatsa ts'ebetso ea kaho le ho fokotsa tšebeliso ea matla. E na le bohlokoa ba bohlokoa liindastering tse kang merafo ea sebaka sa oli le liphahlo tsa meralo.
2. Phetoho ea Hydrophobic ea hydroxyethyl cellulose
HEC hydrophobic modification hangata e finyelloa ka ho hlahisa lihlopha tsa hydrophobic ho fetola thepa ea eona ea ho qhibiliha le e teteaneng ka ho kopanya lik'hemik'hale kapa ho fetola 'mele. Mekhoa e tloaelehileng ea ho fetola hydrophobic ke e latelang:
Hydrophobic sehlopha sa grafting
Ho hlahisa alkyl (e kang hexadecyl), aryl (e kang phenyl), siloxane kapa lihlopha tse nang le fluorinated molek'hule ea HEC ka karabelo ea lik'hemik'hale ho ntlafatsa hydrophobicity ea eona. Ka mohlala:
Ho sebelisa esterification kapa etherification reaction ho graft alkyl ea ketane e telele, joalo ka hexadecyl kapa octyl, ho theha sebopeho se kopanyang sa hydrophobic.
Ho hlahisa lihlopha tsa silicone ka phetoho ea siloxane ho ntlafatsa ho hanyetsa metsi le lubricity.
Ho sebelisa phetoho ea fluorination ho ntlafatsa ho hanyetsa boemo ba leholimo le hydrophobicity, ho etsa hore e tšoanelehe bakeng sa liphahlo tse phahameng kapa likopo tse khethehileng tsa tikoloho.
Copolymerization kapa phetoho e kopanyang
Ka ho hlahisa li-comonomers (tse kang acrylates) kapa li-cross-linking agents (tse kang li-epoxy resin) ho theha marang-rang a marang-rang, ho hanyetsa metsi le bokhoni ba ho teteka ba HEC ho ntlafatsoa. Ka mohlala, ho sebelisa HEC e fetotsoeng ka hydrophobically ka emulsion ea polymer e ka ntlafatsa botsitso le phello e teteaneng ea emulsion.
Phetoho ea 'mele
Ho sebelisa theknoloji ea adsorption kapa ea ho roala, limolek'hule tsa hydrophobic li koahetsoe holim'a HEC ho etsa hydrophobicity e itseng. Mokhoa ona o batla o le bonolo ebile o loketse lits'ebetso tse nang le litlhoko tse phahameng tsa botsitso ba lik'hemik'hale, joalo ka lijo le meriana.
Phetoho ea mokhatlo oa Hydrophobic
Ka ho hlahisa sehlopha se senyenyane sa lihlopha tsa hydrophobic molek'hule ea HEC, e etsa motsoako oa associative ka tharollo ea metsi, kahoo e ntlafatsa bokhoni ba ho teteka. Mokhoa ona o sebelisoa haholo ho nts'etsopele ea li-thickeners tse sebetsang hantle 'me o loketse ho roala, lik'hemik'hale tsa oli le masimo a mang.
Hydrophobic phetoho eahydroxyethyl celluloseke mokhoa oa bohlokoa oa ho ntlafatsa ts'ebetso ea ts'ebeliso ea eona, e ka ntlafatsang bokhoni ba eona bo botenya, botsitso ba emulsification, ho hanyetsa metsi le thepa ea rheological. Mekhoa e tloaelehileng ea ho fetola e kenyelletsa hydrophobic grafting, copolymerization kapa cross-linking modification, phetoho ea 'mele le phetoho ea mokhatlo oa hydrophobic. Khetho e utloahalang ea mekhoa ea ho fetola e ka ntlafatsa ts'ebetso ea HEC ho latela litlhoko tse fapaneng tsa kopo, e le hore e be le karolo e kholoanyane likarolong tse ngata tse kang liphahlo tsa meralo, lik'hemik'hale tsa oli, tlhokomelo ea botho le meriana.
Nako ea poso: Mar-25-2025