I-Hydroxyethyl cellulose (HEC)ihlala incibilika kakhulu emanzini ebangeni elibanzi lokushisa, ngisho nasezifundeni ezinezinga lokushisa eliphezulu lapho amanye ama-cellulose ethers angewona ama-ionic amakhemikhali afana ne-methyl cellulose (MC) kanye ne-hydroxypropyl methyl cellulose (HpMC) ebonisa amaphuzu e-turbidity. Ukuze kucaciswe imbangela yokuncibilika okuphezulu kwe-HEC, ukuncika kwezinga lokushisa lokwakheka kwamanzi nH kuyunithi ngayinye ye-glucopyran kumasampuli e-HEC kwahlolwa phezu kwamazinga okushisa alandelayo asuka ku-10 kuya ku-70 °C kusetshenziswa izilinganiso ze-spectrum ze-dielectric eziphezulu kakhulu ezifika ku-50 GHz.
Kulolu cwaningo, amasampula e-HEC ahlolelwa inombolo ye-molar ye-hydroxyethyl substitutions (MS) yeyunithi ngayinye ye-glucose pyran esukela ku-1.3 kuya ku-3.6. Wonke amasampula e-HEC ahlakazwa emanzini ngaphakathi kwebanga lokushisa elihloliwe futhi azange abonise amaphuzu e-turbidity. Inani le-nH lamasampuli e-HEC ane-MS 1.3 ngu-14 ku-20 °C, futhi lehla kancane njengoba izinga lokushisa likhuphuka, futhi lehla liye ku-10 ku-70 °C. Inani elingu-PH lesampula le-HEC ngokusobala likhulu kunenani eliyisisekelo elibalulekile le-nH lesilinganiso. 5 Ama-cellulose ether afana ne-MC ne-HpMC kufanele ahlakazwe emanzini, ngisho nasezingeni lokushisa eliphezulu.
Ama-molecule e-HEC, nokho, ancibilika emanzini ebangeni elibanzi lokushisa. Ukuncika kwezinga lokushisa kwe-nH yamasampuli e-HEC kanye ne-triglycol (izinhlanganisela zemodeli zama-substituents e-HEC) kuncane futhi kuyafana komunye nomunye. Lokhu kubheka kuphakamisa ngokuqinile ukuthi ukuziphatha kwe-hydration / dehydration kwamasampuli e-HEC kulawulwa kakhulu ngamaqembu abo afakwe esikhundleni. 3 ngu-14 ku-20 °C, yehla kancane njengoba izinga lokushisa likhuphuka, futhi lehla liye ku-10 ku-70 °C. Inani le-nH lesampula le-HEC ngokusobala likhulu kunenani elibalulekile le-nH elilinganiselwe. 5 Ama-cellulose ether afana ne-MC ne-HpMC kufanele ahlakazwe emanzini, ngisho nasezingeni lokushisa eliphezulu. Ama-molecule e-HEC, nokho, ancibilika emanzini ebangeni elibanzi lokushisa. Ukuncika kwezinga lokushisa kwe-nH yamasampuli e-HEC kanye ne-triglycol (izinhlanganisela zemodeli zama-substituents e-HEC) kuncane futhi kuyafana komunye nomunye.
Lokhu kubheka kuphakamisa ngokuqinile ukuthi ukuziphatha kwe-hydration / dehydration kwamasampuli e-HEC kulawulwa kakhulu ngamaqembu abo afakwe esikhundleni. 3 ngu-14 ku-20 °C, yehla kancane njengoba izinga lokushisa likhuphuka, futhi lehla liye ku-10 ku-70 °C. Inani le-nH lesampula le-HEC ngokusobala likhulu kunenani elibalulekile le-nH elilinganiselwe. 5 Ama-cellulose ether afana ne-MC ne-HpMC kufanele ahlakazwe emanzini, ngisho nasezingeni lokushisa eliphezulu. Ama-molecule e-HEC, nokho, ancibilika emanzini ebangeni elibanzi lokushisa. Ukuncika kwezinga lokushisa kwe-nH yeI-HECamasampula kanye ne-triglycol (izinhlanganisela zemodeli zabasekeli be-HEC) zithambile futhi ziyefana. Lokhu kubheka kuphakamisa ngokuqinile ukuthi ukuziphatha kwe-hydration / dehydration kwamasampuli e-HEC kulawulwa kakhulu ngamaqembu abo afakwe esikhundleni.
Inani le-nH lesampula le-HEC ngokusobala likhulu kunenani elibalulekile le-nH elilinganiselwe. 5 Ama-cellulose ether afana ne-MC ne-HpMC kufanele ahlakazwe emanzini, ngisho nasezingeni lokushisa eliphezulu. Ama-molecule e-HEC, nokho, ancibilika emanzini ebangeni elibanzi lokushisa. Ukuncika kwezinga lokushisa kwe-nH yamasampuli e-HEC kanye ne-triglycol (izinhlanganisela zemodeli zama-substituents e-HEC) kuncane futhi kuyafana komunye nomunye. Lokhu kubheka kuphakamisa ngokuqinile ukuthi ukuziphatha kwe-hydration / dehydration kwamasampuli e-HEC kulawulwa kakhulu ngamaqembu abo afakwe esikhundleni. Inani le-nH lesampula le-HEC ngokusobala likhulu kunenani elibalulekile le-nH elilinganiselwe. 5 Ama-cellulose ether afana ne-MC ne-HpMC kufanele ahlakazwe emanzini, ngisho nasezingeni lokushisa eliphezulu. Ama-molecule e-HEC, nokho, ancibilika emanzini ebangeni elibanzi lokushisa. Ukuncika kwezinga lokushisa kwe-nH yamasampuli e-HEC kanye ne-triglycol (izinhlanganisela zemodeli zama-substituents e-HEC) kuncane futhi kuyafana komunye nomunye.
Lokhu kubheka kuphakamisa ngokuqinile ukuthi ukuziphatha kwe-hydration / dehydration kwamasampuli e-HEC kulawulwa kakhulu ngamaqembu abo afakwe esikhundleni. Ama-molecule e-HEC ancibilika emanzini ebangeni lokushisa elibanzi. Ukuncika kwezinga lokushisa kwe-nH yamasampuli e-HEC kanye ne-triglycol (izinhlanganisela zemodeli zama-substituents e-HEC) kuncane futhi kuyafana komunye nomunye. Lokhu kubheka kuphakamisa ngokuqinile ukuthi ukuziphatha kwe-hydration / dehydration kwamasampuli e-HEC kulawulwa kakhulu ngamaqembu abo afakwe esikhundleni.I-HECama-molecule ancibilika emanzini phezu kwezinga lokushisa elibanzi. Ukuncika kwezinga lokushisa kwe-nH yamasampuli e-HEC kanye ne-triglycol (izinhlanganisela zemodeli zama-substituents e-HEC) kuncane futhi kuyafana komunye nomunye. Lokhu kubheka kuphakamisa ngokuqinile ukuthi ukuziphatha kwe-hydration / dehydration kwamasampuli e-HEC kulawulwa kakhulu ngamaqembu abo afakwe esikhundleni.
Isikhathi sokuthumela: Apr-25-2024