IHydroxyethylcellulose (HEC) iyi-polymer encibilika emanzini esetshenziswa kabanzi emikhiqizweni ehlukahlukene yezimboni neyansuku zonke yabathengi, ikakhulukazi emikhiqizweni yokunakekelwa komuntu siqu kanye nezihlanzi. Inokuqina okuhle, ukumisa okwesikhashana, i-emulsifying, ukwakheka kwefilimu kanye nemisebenzi ye-colloid evikelayo, ngakho-ke ivame ukusetshenziswa njenge-thickener insipho ewuketshezi.
1. Isakhiwo kanye nezakhiwo ze-hydroxyethyl cellulose
I-HEC iwukuphuma kwe-nonionic etholakala ku-cellulose ngokusabela kwe-etherification futhi inamandla aqinile wokukhipha amanzi kanye ne-hydrophilicity. Iketango lamangqamuzana e-HEC liqukethe amaqembu amaningi e-hydroxyethyl athatha indawo yama-athomu e-hydrogen e-cellulose yemvelo, akha uchungechunge lwezakhiwo zamangqamuzana ezinochungechunge olude. Lesi sakhiwo samangqamuzana sivumela i-HEC ukuthi ivuvuke ngokushesha emanzini ukuze yenze isisombululo se-viscous esifanayo.
Impahla ebalulekile ye-HEC ukuzivumelanisa nezimo namanani e-pH ahlukene. Igcina umphumela wayo wokujiya phezu kwebanga elibanzi le-pH, ikunikeza inzuzo ephawulekayo emikhiqizweni efana nezinsipho eziwuketshezi, ezingase zibe nezithako ezisebenzayo eziningi kanye nezinguquko ze-pH. Ngaphezu kwalokho, i-HEC iphinde ibe ne-biocompatibility enhle nokuphepha, futhi ifanele ukusetshenziswa emikhiqizweni ehlukahlukene ehlangana nomzimba womuntu, njengensipho ewuketshezi, i-shampoo, njll.
2. Indlela yokujiya ye-hydroxyethyl cellulose ensipho ewuketshezi
Ekwakhekeni kwensipho ewuketshezi, indlela eyinhloko yesenzo se-HEC njenge-thickener ukukhulisa i-viscosity yensipho ewuketshezi ngokuncibilika emanzini ukwenza isisombululo se-viscous. Ngokuqondile, lapho i-HEC incibilika emanzini, amaketanga ayo amangqamuzana ahlangana nama-molecule amanzi ngokusebenzisa amabhondi e-hydrogen e-intermolecular ukuze akhe isakhiwo senethiwekhi esiyinkimbinkimbi. Lesi sakhiwo senethiwekhi singabopha ngokuphumelelayo inani elikhulu lama-molecule amanzi, ngaleyo ndlela kukhulisa kakhulu i-viscosity yesisombululo.
Umphumela wokuqina we-HEC uhlobene eduze nesisindo sayo samangqamuzana nenani lokwengeza. Ngokuvamile, isisindo esikhulu samangqamuzana e-HEC, siphakamisa i-viscosity yesisombululo esakhiwe; ngesikhathi esifanayo, ukuphakama okuphezulu kwe-HEC esixazululweni, umphumela wokuqina uzoba sobala kakhulu. Kodwa-ke, ezinhlelweni ezisebenzayo, ukugxila okuphezulu kakhulu kwe-HEC kungabangela isisombululo ukuthi sibe ne-viscous kakhulu futhi kuthinte ulwazi lomsebenzisi, ngakho-ke idinga ukulawulwa ngokucophelela phakathi nokuklama kokuklama.
3. Izinzuzo zomphumela wokuqina we-HEC
I-HEC inezinzuzo ezimbalwa ezibalulekile ngaphezu kwamanye ama-thickeners. Okokuqala, ine-solubility enhle kakhulu yamanzi futhi ingancibilika ngokushesha emanzini abandayo noma ashisayo bese yenza isisombululo se-viscous esifanayo. Okwesibili, i-HEC ayigcini nje ngokuqina ngokuphumelelayo ekugxilweni okuphansi, kodwa futhi inikeza umphumela ozinzile wokuqina, obaluleke kakhulu emikhiqizweni yensipho ewuketshezi edinga ukugcinwa isikhathi eside. Okwesithathu, njenge-thickener engeyona i-ionic, i-HEC ingagcina i-viscosity ezinzile ngaphansi kwezimo ezihlukene ze-pH futhi ayithinteki kalula kwezinye izingxenye ohlelweni.
4. Ukusebenza kwe-HEC ekwenziweni kwensipho ewuketshezi
Ekukhiqizeni kwangempela, i-HEC ivame ukungezwa ekwakhiweni kwensipho ewuketshezi ngendlela yempushana. Ukuze kuqinisekiswe ukuthi i-HEC ingancibilika ngokugcwele futhi isebenzise umphumela wayo wokujiya, ngokuvamile kudingekile ukunaka ukufana kokuxuba lapho wengeza i-HEC ukuze ugweme ukuhlanganisa. Ngaphezu kwalokho, ukuze kuqhutshekwe nokwandisa ukusebenza kwensipho ewuketshezi, i-HEC ivame ukusetshenziswa kanye nezinye izinto eziwugqinsi, ama-humectants noma ama-surfactants ukuze kuzuzwe ukuthungwa komkhiqizo okuhle kanye nolwazi lomsebenzisi.
Njenge-thickener esebenza kahle, i-hydroxyethyl cellulose inethuba elibanzi lokusetshenziswa kwensipho ewuketshezi. Ingakhuphula kakhulu i-viscosity yomkhiqizo futhi ithuthukise ulwazi lomsebenzisi. Futhi inokuhambisana okuhle nokuzinza futhi iyinketho ekahle yokujiya insipho ewuketshezi.
Isikhathi sokuthumela: Aug-19-2024