Hydroxyethyl cellulose (HEC)bụ nonionic cellulose ether nke na-agbaze mmiri, nke a na-ejikarị eme ihe na mkpuchi, ihe ụlọ, ọgwụ, kemịkalụ kwa ụbọchị na ubi ndị ọzọ. Otú ọ dị, HEC nwere nnukwu mmiri solubility na hydrophobicity na-adịghị ike, nke nwere ike iduga njedebe arụmọrụ na ụfọdụ ngwa ngwa. Ya mere, hydrophobically modified hydroxyethyl cellulose (HMHEC) bịara na-eme ka mma ya rheological Njirimara, ndim ike, emulsification kwụsie ike na mmiri na-eguzogide.
1. Ihe mgbanwe hydrophobic nke hydroxyethyl cellulose pụtara
Na-emeziwanye ihe ndị na-emepụta ihe na ihe rheological
Mgbanwe nke hydrophobic nwere ike ime ka ikike nke HEC dịkwuo elu, karịsịa na ọnụ ọgụgụ dị ala. Ọ na-egosi viscosity dị elu, nke na-enyere aka melite thixotropy na pseudoplasticity nke usoro. Ihe onwunwe a dị mkpa karịsịa na mpaghara mkpuchi, mmiri mmiri na-egwupụta mmanụ, ngwaahịa nlekọta onwe onye, wdg, ma nwee ike ịkwalite nkwụsi ike na iji mmetụta nke ngwaahịa ahụ.
Melite nkwụsi ike emulsion
Ebe ọ bụ na HEC gbanwetụrụ nwere ike ịmepụta usoro ihe jikọrọ ya na ngwọta mmiri, ọ na-eme ka nkwụsi ike nke emulsion dịkwuo mma, nwere ike ibelata nkewa mmanụ-mmiri, ma melite mmetụta emulsification. Ya mere, ọ nwere uru ngwa dị ukwuu n'ọhịa nke mkpuchi emulsion, ngwaahịa nlekọta anụ ahụ na emulsifiers nri.
Mee ka mmiri na-eguzogide mmiri na ihe nkiri na-emepụta ihe
Omenala HEC bụ nke ukwuu hydrophilic na mfe soluble na elu iru mmiri gburugburu ma ọ bụ mmiri, nke na-emetụta mmiri na-eguzogide ihe. Site na mgbanwe hydrophobic, ngwa ya na mkpuchi, ihe nkpuchi, akwụkwọ na-emepụta ihe na ubi ndị ọzọ nwere ike ime ka ọ dịkwuo mma, a pụkwara ime ka mmiri na-eguzogide mmiri na ihe nkiri na-emepụta ihe.
Melite njirimara mkparị shii
Hydrophobic-gbanwetụrụ HEC nwere ike ibelata viscosity n'okpuru ọnọdụ ịkwa akwa dị elu, ebe ị na-eme ka ọ dị elu na ọnụ ọgụgụ dị ala, si otú a na-emeziwanye ihe owuwu ụlọ na ibelata oriri ike. Ọ nwere uru dị mkpa na ụlọ ọrụ dị ka ebe a na-egwupụta mmanụ na ihe mkpuchi ụlọ.
2. Hydrophobic mgbanwe nke hydroxyethyl cellulose
A na-enwetakarị mgbanwe HEC hydrophobic site na iwebata otu hydrophobic iji mezie solubility ya na ihe ndị na-eme ka ọ dịkwuo mma site na grafting kemịkalụ ma ọ bụ mgbanwe anụ ahụ. Ụzọ mgbanwe hydrophobic a na-ahụkarị bụ ndị a:
Hydrophobic otu grafting
Ewebata alkyl (dị ka hexadecyl), aryl (dị ka phenyl), siloxane ma ọ bụ fluorinated ìgwè na HEC molekul site kemịkalụ mmeghachi omume iji melite ya hydrophobicity. Ọmụmaatụ:
Iji esterification ma ọ bụ etherification mmeghachi omume na akado ogologo yinye alkyl, dị ka hexadecyl ma ọ bụ octyl, na-etolite a hydrophobic mkpakọrịta nwoke na nwaanyị.
Ewebata otu silicone site na mgbanwe siloxane iji kwalite nguzogide mmiri na mmanu ya.
Iji mgbanwe fluorination na-emeziwanye nguzogide ihu igwe na hydrophobicity, na-eme ka ọ dị mma maka mkpuchi dị elu ma ọ bụ ngwa gburugburu ebe obibi pụrụ iche.
Copolymerization ma ọ bụ mgbanwe njikọ njikọ
Site n'iwebata comonomers (dị ka acrylates) ma ọ bụ ndị na-emekọrịta ihe (dị ka epoxy resins) iji mepụta netwọk na-ejikọta ọnụ, a na-eme ka mmiri na-eguzogide mmiri na ike siri ike nke HEC. Dị ka ihe atụ, iji hydrophobically gbanwetụrụ HEC na polymer emulsions nwere ike welie nkwụsi ike na ndim mmetụta nke emulsion.
Mgbanwe nke anụ ahụ
N'iji mgbasa ozi elu ma ọ bụ teknụzụ mkpuchi, a na-ekpuchi mkpụrụ ndụ hydrophobic n'elu HEC iji mepụta ụfọdụ hydrophobicity. Usoro a dị obere ma dabara adaba maka ngwa nwere nnukwu ihe achọrọ maka nkwụsi ike kemịkalụ, dị ka nri na ọgwụ.
Hydrophobic mkpakọrịta mgbanwe
Site n'iwebata obere ìgwè hydrophobic na HEC molecule, ọ na-eme ka nchịkọta ihe na-emekọ ihe na ngwọta mmiri, si otú ahụ na-eme ka ike sie ike. A na-eji usoro a eme ihe n'ọtụtụ ebe na mmepe nke ndị na-arụ ọrụ dị elu ma dị mma maka mkpuchi, kemịkalụ mmanụ mmanụ na ubi ndị ọzọ.
Hydrophobic mgbanwe nkehydroxyethyl cellulosebụ ụzọ dị mkpa iji melite arụmọrụ ngwa ya, nke nwere ike ime ka ikike ya dịkwuo elu, nkwụsi ike emulsification, nguzogide mmiri na njirimara rheological. Ụzọ mgbanwe ndị a na-emekarị gụnyere hydrophobic group grafting, copolymerization or cross-linking modification, mgbanwe anụ ahụ na mgbanwe hydrophobic mkpakọrịta. Nhọrọ ezi uche dị na ya nke usoro mgbanwe nwere ike ịkwalite arụmọrụ nke HEC dị ka ngwa ngwa dị iche iche si dị, ka ọ wee rụọ ọrụ dị ukwuu n'ọtụtụ mpaghara dị ka mkpuchi ụlọ, kemịkalụ mmanụ mmanụ, nlekọta onwe onye, na ọgwụ.
Oge nzipu: Mar-25-2025