IHydroxyethylcellulose (HEC) yipolymer enyibilikayo emanzini esetyenziswa ngokubanzi kwiimveliso ezahlukeneyo zamashishini kunye nemihla ngemihla yabathengi, ngakumbi kwiimveliso zokhathalelo lomntu kunye nezicoci. Inokuqina kakuhle, ukumisa, i-emulsifying, ifilimu-ifom kunye nemisebenzi yokukhusela i-colloid, ngoko isoloko isetyenziswa njenge-thickener kwisepha yolwelo.
1. Isakhiwo kunye neepropati ze-hydroxyethyl cellulose
I-HEC yi-nonionic derivative efunyenwe kwi-cellulose ngokusebenzisa i-etherification reaction kwaye inamandla okuqina okumanzi kunye ne-hydrophilicity. Itsheyini yemolekyuli ye-HEC inamaqela amaninzi e-hydroxyethyl athatha indawo ye-athomu ye-hydrogen ye-cellulose yendalo, eyenza uthotho lwezakhiwo ze-molecular chain chain. Esi sakhiwo se-molecular sivumela i-HEC ukuba idumbe ngokukhawuleza emanzini ukuze yenze isisombululo se-viscous esifanayo.
Ipropati ebalulekileyo ye-HEC kukuguquguquka kwayo kumaxabiso ahlukeneyo e-pH. Igcina isiphumo sayo esityebileyo kuluhlu olubanzi lwe-pH, inika inzuzo enkulu kwiimveliso ezinjengesepha elulwelo, ezinokuba nezithako ezininzi ezisebenzayo kunye notshintsho lwe-pH. Ukongeza, i-HEC ikwane-biocompatibility efanelekileyo kunye nokhuseleko, kwaye ifanelekile ukusetyenziswa kwiimveliso ezahlukeneyo ezidibana nomzimba womntu, njengesepha yolwelo, ishampu, njl.
2. Indlela yokujiya ye-hydroxyethyl cellulose kwisepha engamanzi
Ekuqulunqweni kwesepha ye-liquid, indlela ephambili yesenzo se-HEC njenge-thickener kukunyusa i-viscosity yesepha yolwelo ngokunyibilika emanzini ukwenza isisombululo se-viscous. Ngokukodwa, xa i-HEC inyibilika emanzini, i-molecular chain chain idibanisa kunye neemolekyuli zamanzi ngokusebenzisa iibhondi ze-hydrogen ze-intermolecular ukwenza isakhiwo sothungelwano esiyinkimbinkimbi. Esi sakhiwo sothungelwano sinokubopha ngokufanelekileyo inani elikhulu leemolekyuli zamanzi, ngaloo ndlela kwandisa kakhulu i-viscosity yesisombululo.
Umphumo wokuqina we-HEC uhambelana ngokusondeleyo nobunzima bemolekyuli kunye nesixa sokongeza. Ngokuqhelekileyo, ubunzima obukhulu be-molecular of HEC, buphezulu i-viscosity yesisombululo esenziwe; ngelo xesha, ukuphakama kwe-HEC kwisisombululo, kuya kubonakala ngakumbi umphumo wokuqina. Nangona kunjalo, kwizicelo ezisebenzayo, ugxininiso oluphezulu lwe-HEC lunokubangela ukuba isisombululo sibe ne-viscous kakhulu kwaye sichaphazele amava omsebenzisi, ngoko kufuneka ilawulwe ngononophelo ngexesha loyilo lokuqulunqa.
3. Izinto ezilungileyo ze-HEC isiphumo sokuqina
I-HEC ineenzuzo ezininzi ezibalulekileyo ngaphezu kwezinye izityebi. Okokuqala, ine-solubility enhle kakhulu yamanzi kwaye inokunyibilika ngokukhawuleza emanzini abandayo okanye ashushu kwaye yenza isisombululo se-viscous esifanayo. Okwesibini, i-HEC ayiqini kuphela ngokufanelekileyo kwiindawo ezisezantsi, kodwa ikwabonelela ngesiphumo esizinzileyo sokuqina, esibaluleke kakhulu kwiimveliso zesepha yolwelo ezifuna ukugcinwa kwexesha elide. Okwesithathu, njenge-thickener non-ionic, i-HEC inokugcina i-viscosity ezinzileyo phantsi kweemeko ezahlukeneyo ze-pH kwaye ayichatshazelwa lula ngamanye amacandelo kwinkqubo.
4. Ukusetyenziswa kwe-HEC kukwenziwa kwesepha engamanzi
Kwimveliso eyiyo, i-HEC idla ngokudityaniswa kwimixube yesepha engamanzi kwifom yomgubo. Ukuze kuqinisekiswe ukuba i-HEC inokunyibilika ngokupheleleyo kwaye isebenzise umphumo wayo wokuqina, ngokuqhelekileyo kuyimfuneko ukubeka ingqalelo ekufaniseni ukuxuba xa ukongeza i-HEC ukuphepha i-agglomeration. Ukongeza, ukuze kuphuculwe ngakumbi ukusebenza kwesepha yolwelo, i-HEC ihlala isetyenziswa ngokudibeneyo nezinye ii-thickeners, i-humectants okanye i-surfactants ukufezekisa ukuthungwa kwemveliso kunye namava omsebenzisi.
Njengesingqinisiso esisebenzayo, i-hydroxyethyl cellulose inethuba elibanzi lokusetyenziswa kwisepha engamanzi. Inokunyusa kakhulu i-viscosity yemveliso kunye nokuphucula amava omsebenzisi. Ikwanayo nokuhambelana kakuhle kunye nokuzinza kwaye lukhetho olufanelekileyo lokujiya isepha engamanzi.
Ixesha lokuposa: Aug-19-2024