Hydroxyethyl Cellulose (HEC)inonzi nonionic cellulose ether inonyungudika nemvura, iyo inoshandiswa zvakanyanya mukuputira, zvinhu zvekuvaka, mishonga, makemikari ezuva nezuva uye mamwe minda. Nekudaro, HEC ine yakakwira solubility yemvura uye isina kusimba hydrophobicity, izvo zvinogona kutungamirira kumipimo yekushanda mune mamwe mamiriro ekushandisa. Naizvozvo, hydrophobically modified hydroxyethyl cellulose (HMHEC) yakatanga kuve yekuvandudza rheological maitiro, thickening kugona, emulsification kugadzikana uye kuramba mvura.
1. Kukosha kwekugadziriswa kwehydrophobic ye hydroxyethyl cellulose
Kuvandudza thickening zvivakwa uye rheological zvinhu
Hydrophobic modification inogona kuvandudza zvakanyanya kugona kwekukora kweHEC, kunyanya pakaderera shear mitengo. Iyo inoratidza yakakwirira viscosity, iyo inobatsira kuvandudza iyo thixotropy uye pseudoplasticity yehurongwa. Ichi chivakwa chakanyanya kukosha muminda yekupfeka, yemafuta ekuchera zvinwiwa, zvigadzirwa zvekuchengeta munhu, nezvimwe, uye inogona kusimudzira kugadzikana uye kushandisa mhedzisiro yechigadzirwa.
Kuvandudza emulsion kugadzikana
Sezvo HEC yakagadziridzwa inogona kuumba sangano rekubatanidza mune aqueous solution, inonyanya kuvandudza kugadzikana kwemulsion, inogona kuderedza kuparadzaniswa kwemafuta-mvura, nekuvandudza emulsification effect. Nokudaro, ine kukosha kukuru kwekushandisa muminda ye emulsion coatings, zvigadzirwa zvekuchengetedza ganda uye emulsifiers yezvokudya.
Wedzera kusamira kwemvura uye firimu-kugadzira zvinhu
Yechinyakare HEC yakanyanya hydrophilic uye inonyungudika zviri nyore munzvimbo dzakanyorova kana mvura, izvo zvinokanganisa kushomeka kwemvura kwezvinhu. Kuburikidza nekugadziriswa kwehydrophobic, kushandiswa kwayo mukuputira, zvinonamira, kugadzira mapepa uye mamwe minda inogona kuvandudzwa, uye kudzivirira kwayo kwemvura uye firimu-kuumba zvimiro zvinogona kuvandudzwa.
Vandudzai shear thinning properties
Hydrophobic-modified HEC inogona kuderedza viscosity pasi pemamiriro ekuveura kwepamusoro, apo ichichengetedza kuwirirana kwepamusoro pamatengo akaderera ekucheka, nokudaro kuvandudza kushanda kwekuvaka uye kuderedza kushandiswa kwesimba. Iyo ine kukosha kwakakosha mumaindasitiri akadai semigodhi yemafuta emugodhi uye machira ekuvaka.
2. Hydrophobic kugadziriswa kwehydroxyethyl cellulose
HEC hydrophobic modification inowanzoitwa nekuunza hydrophobic mapoka kuti agadzirise kunyungudika kwayo uye kukora zvivakwa kuburikidza nemakemikari grafting kana kugadziridzwa kwemuviri. Yakajairika hydrophobic gadziriso nzira ndedzinotevera:
Hydrophobic group grafting
Kuunza alkyl (senge hexadecyl), aryl (senge phenyl), siloxane kana mapoka efluorinated paHEC molecule kuburikidza nemakemikari reaction kuti ivandudze hydrophobicity yayo. Semuyenzaniso:
Kushandisa esterification kana etherification reaction kune graft refu-chain alkyl, senge hexadecyl kana octyl, kuumba hydrophobic asociating chimiro.
Kuunza mapoka e-silicone kuburikidza ne siloxane gadziriso yekuvandudza mvura yayo kuramba uye lubricity.
Kushandisa fluorination gadziriso yekuvandudza mamiriro ekunze kuramba uye hydrophobicity, ichiita kuti ive yakakodzera kune yepamusoro-yekupedzisira coating kana yakakosha yezvakatipoteredza application.
Copolymerization kana kuchinjika-kubatanidza kuchinjika
Nekuunza macomonomers (akadai seacrylates) kana ma-cross-linking agents (akadai seepoxy resins) kuti agadzire network yekubatanidza, kudzivirira kwemvura uye kugona kweHEC kunovandudzwa. Semuenzaniso, kushandisa hydrophobically modified HEC mu polymer emulsions inogona kuwedzera kugadzikana uye kukora maitiro emulsion.
Kuchinja kwemuviri
Uchishandisa pamusoro adsorption kana coating tekinoroji, hydrophobic mamorekuru akaputirwa pamusoro peHEC kuumba imwe hydrophobicity. Iyi nzira ine hunyoro uye yakakodzera kune zvikumbiro zvine zvakakwirira zvinodiwa pakugadzikana kwemakemikari, sekudya nemishonga.
Hydrophobic association modification
Nekuunza mashoma mashoma emapoka e-hydrophobic pane HEC molecule, inoumba asociative aggregate mumushonga wemvura, nekudaro ichivandudza kugona kwekukora. Iyi nzira inoshandiswa zvakanyanya mukugadzirwa kwepamusoro-kushanda thickeners uye inokodzera kuvhara, makemikari emafuta uye mamwe minda.
Hydrophobic shanduko yehydroxyethyl celluloseinzira yakakosha yekuvandudza kushanda kwayo kwekushandisa, iyo inogona kuwedzera kugona kwayo kukora, kugadzikana kwe emulsification, kuramba kwemvura uye rheological properties. Nzira dzakajairika dzekushandura dzinosanganisira hydrophobic group grafting, copolymerization kana cross-linking modification, kuchinjwa kwemuviri uye hydrophobic association modification. Kusarudzwa kunonzwisisika kwemaitiro ekugadzirisa kunogona kukwidziridza kushanda kweHEC maererano nezvinodiwa zvakasiyana-siyana zvekushandisa, kuitira kuti iite basa rakakura mundima dzakawanda dzakadai semajeti ekuvaka, makemikari emumunda wemafuta, kutarisirwa kwevanhu, uye mushonga.
Nguva yekutumira: Mar-25-2025