Haịdroxyethyl Cellulose (HEC)bụ cellulose ether nke na-agbaze mmiri nke na-abụghị nke ionic, nke a na-ejikarị eme ihe n'ihe mkpuchi, ihe owuwu ụlọ, ọgwụ, kemịkalụ kwa ụbọchị na ubi ndị ọzọ. Agbanyeghị, HEC nwere nnukwu mmiri ịgbaze na hydrophobicity adịghị ike, nke nwere ike ibute oke arụmọrụ n'ọnọdụ ụfọdụ ojiji. Ya mere, hydrophobically modified hydroxyethyl cellulose (HMHEC) malitere ịdị iji melite njirimara rheological ya, ikike ịka nká, nkwụsi ike emulsification na iguzogide mmiri.
1. Mkpa mgbanwe hydrophobic nke hydroxyethyl cellulose
Imeziwanye ihe ndị dị oké mkpa na ihe ndị dị na rheological
Mgbanwe hydrophobic nwere ike ime ka ikike HEC dịkwuo mma nke ukwuu, ọkachasị na obere ọnụego shea. Ọ na-egosi viscosity dị elu, nke na-enyere aka ime ka thixotropy na pseudoplasticity nke sistemụ ahụ ka mma. Ihe onwunwe a dị oke mkpa n'ọhịa mkpuchi, mmiri mmanụ, ngwaahịa nlekọta onwe onye, wdg, ma nwee ike ime ka ngwaahịa ahụ kwụsie ike na mmetụta ojiji ya ka mma.
Meziwanye nkwụsi ike emulsion
Ebe ọ bụ na HEC a gbanwere agbanwe nwere ike ịmepụta usoro njikọta na mmiri mmiri, ọ na-eme ka nkwụsi ike nke emulsion dịkwuo mma nke ukwuu, nwere ike ibelata nkewa mmanụ na mmiri, ma melite mmetụta emulsification. Ya mere, ọ nwere nnukwu uru ojiji n'ọhịa nke mkpuchi emulsion, ngwaahịa nlekọta akpụkpọ ahụ na emulsifiers nri.
Mee ka iguzogide mmiri na ihe ndị na-emepụta ihe nkiri dịkwuo mma
HEC ọdịnala nwere oke mmiri mmiri ma dịkwa mfe ịgbari n'ebe mmiri dị elu ma ọ bụ mmiri, nke na-emetụta iguzogide mmiri nke ihe ahụ. Site na mgbanwe hydrophobic, enwere ike ime ka ojiji ya dịkwuo mma na mkpuchi, ihe mmado, ime akwụkwọ na ubi ndị ọzọ, enwere ike ime ka iguzogide mmiri na ihe ndị na-emepụta fim ka mma.
Meziwanye ihe ndị na-eme ka shear dị gịrịgịrị
HEC nke a gbanwere site na hydrophobic nwere ike ibelata viscosity n'okpuru ọnọdụ nkụcha dị elu, ebe ọ na-anọgide na-enwe nguzozi dị elu na obere ọnụego nkụcha, si otú a na-eme ka arụmọrụ owuwu ka mma ma belata oriri ike. Ọ nwere uru dị mkpa n'ọrụ dịka igwu ala mmanụ na mkpuchi ụlọ.
2. Mgbanwe Hydrophobic nke hydroxyethyl cellulose
A na-enweta mgbanwe HEC hydrophobic site n'iwebata otu hydrophobic iji gbanwee ike ya na ihe ndị na-eme ka ọ sie ike site na ịtinye kemịkalụ ma ọ bụ mgbanwe anụ ahụ. Usoro mgbanwe hydrophobic a na-ahụkarị bụ ndị a:
Ịkụnye otu Hydrophobic
Ntinye alkyl (dịka hexadecyl), aryl (dịka phenyl), siloxane ma ọ bụ otu fluorinated na molekul HEC site na mmeghachi omume kemịkalụ iji melite hydrophobicity ya. Dịka ọmụmaatụ:
Iji mmeghachi omume esterification ma ọ bụ etherification mee ihe iji mee ka alkyl dị ogologo, dị ka hexadecyl ma ọ bụ octyl, mepụta usoro njikọ hydrophobic.
Ịwebata otu silicone site na mgbanwe siloxane iji melite iguzogide mmiri na mmanụ ya.
Iji mgbanwe fluorination eme ihe iji melite iguzogide ihu igwe na oke mmiri, na-eme ka ọ dị mma maka mkpuchi elu ma ọ bụ ngwa pụrụ iche maka gburugburu ebe obibi.
Mgbanwe njikọta copolymerization ma ọ bụ njikọta njikọta
Site n'iwebata ihe ndị na-ejikọta ihe (dị ka acrylates) ma ọ bụ ihe ndị na-ejikọ ihe (dị ka epoxy resins) iji mepụta netwọk njikọ, a na-eme ka ikike iguzogide mmiri na ịdị arọ nke HEC ka mma. Dịka ọmụmaatụ, iji HEC agbanwere na hydrophobic na polymer emulsions nwere ike ime ka nkwụsi ike na mmetụta ịdị arọ nke emulsion dịkwuo mma.
Mgbanwe anụ ahụ
Site na iji teknụzụ mmịpụta elu ma ọ bụ mkpuchi, a na-ekpuchi molekul hydrophobic n'elu HEC iji mepụta hydrophobicity ụfọdụ. Usoro a dị nro ma dabara adaba maka ojiji nwere nnukwu ihe achọrọ maka nkwụsi ike kemịkalụ, dịka nri na ọgwụ.
Mgbanwe njikọ hydrophobic
Site n'iwebata obere ìgwè hydrophobic na molekul HEC, ọ na-emepụta mkpokọta njikọta na mmiri mmiri, si otú a na-eme ka ikike ịka nká dịkwuo mma. A na-eji usoro a eme ihe nke ukwuu n'ịmepụta ihe ndị na-eme ka ọ dị arọ nke ọma ma dabara adaba maka mkpuchi, kemịkalụ ubi mmanụ na ubi ndị ọzọ.
Mgbanwe Hydrophobic nkehydroxyethyl cellulosebụ ụzọ dị mkpa isi melite arụmọrụ ngwa ya, nke nwere ike ime ka ikike ya dịkwuo nkọ, nkwụsi ike emulsification, iguzogide mmiri na njirimara rheological dịkwuo mma. Ụzọ mgbanwe ndị a na-emekarị gụnyere nhazi otu hydrophobic, mgbanwe copolymerization ma ọ bụ mgbanwe njikọ, mgbanwe anụ ahụ na mgbanwe njikọ hydrophobic. Nhọrọ ezi uche dị na ụzọ mgbanwe nwere ike ime ka arụmọrụ HEC ka mma dịka ihe dị iche iche achọrọ maka ngwa si dị, ka o wee rụọ ọrụ ka ukwuu n'ọtụtụ ubi dịka mkpuchi ụlọ, kemịkalụ ubi mmanụ, nlekọta onwe onye, na ọgwụ.
Oge ozi: Maachị-25-2025