Hydroxyethyl cellulose (HEC)Inoramba ichinyungudika mumvura zvakanyanya munzvimbo dzakasiyana-siyana dzekupisa, kunyangwe munzvimbo dzine tembiricha yakakwira uko mamwe ma non-ionic chemically modified cellulose ethers akadai semethyl cellulose (MC) uye hydroxypropyl methyl cellulose (HpMC) anoratidza turbidity points. Kuti tinzwisise chikonzero chekunyungudika kwakanyanya kweHEC, kutsamira kwekushisa kwemvura nH yeyuniti yega yega yeglucopyran muHEC samples kwakaongororwa pamusoro pe tembiricha inotevera kubva pa10 kusvika 70 °C uchishandisa zviyero zve dielectric spectrum zvakanyanya kusvika ku50 GHz.
Muchidzidzo ichi, sampuli dzeHEC dzakaongororwa kuti dzione huwandu hwehydroxyethyl substitutions (MS) yeyuniti yega yega yeglucose pyran inotangira pa1.3 kusvika pa3.6. Samples dzese dzeHEC dzakanyungudutswa mumvura mukati me tembiricha yakaongororwa uye hadzina kuratidza turbidity points. NH value yeHEC samples neMS 1.3 i14 pa20 °C, uye inoderera zvishoma nezvishoma tembiricha ichikwira, uye inodonha kusvika pa10 pa70 °C. PH value yeHEC sample iri pachena yakakura kupfuura minimum critical nH value yeinenge 5 Cellulose ethers dzakadai seMC neHpMC dzinofanira kunyungudutswa mumvura, kunyangwe mu tembiricha yakakwira.
Zvisinei, mamorekuru eHEC anonyungudika mumvura patembiricha yakakura. Kuenderana kwetembiricha kwenH yemasampuli eHEC netriglycol (makomputa emhando yeHEC substituents) kuri kushoma uye kwakafanana. Izvi zvinoratidza zvakasimba kuti maitiro emvura/kushaikwa kwemvura mumuviri wemasampuli eHEC anodzorwa zvakanyanya nemapoka avo anotsiviwa. 3 i14 pa20 °C, inoderera zvishoma nezvishoma sezvo tembiricha ichikwira, uye inodonha kusvika pa10 pa70 °C. Kukosha kwenH kwemuenzaniso weHEC kuri pachena kuti kwakakura kupfuura kukosha kwenHH kushoma kweinenge 5 Cellulose ethers dzakadai seMC neHpMC dzinofanira kunyungudika mumvura, kunyangwe patembiricha yakakwira. Zvisinei, mamorekuru eHEC anonyungudika mumvura patembiricha yakakura. Kuenderana kwetembiricha kwenH yemasampuli eHEC netriglycol (makomputa emhando yeHEC substituents) kuri kushoma uye kwakafanana.
Izvi zvinoratidza zvakasimba kuti maitiro emvura/kushaikwa kwemvura mumuviri wemasampuli eHEC anonyanya kudzorwa nemapoka avo akatsiviwa. 3 i14 pa20 °C, inoderera zvishoma nezvishoma sezvo tembiricha ichikwira, uye inodonha kusvika pa10 pa70 °C. Kukosha kwe nH kwemuenzaniso weHEC kuri pachena kuti kwakakura kupfuura kukosha kwe nH kudiki kweinenge 5 Cellulose ethers dzakadai seMC neHpMC dzinofanira kunyungudutswa mumvura, kunyangwe munzvimbo yekupisa kwakanyanya. Zvisinei, mamorekuru eHEC anonyunguduka mumvura munzvimbo yekupisa yakakura. Kutsamira kwe nH yeHECsampuro ne triglycol (mhando yemakomputa e HEC substituents) hazvina kunyanya kuoma uye zvakafanana. Izvi zvinoratidza zvakasimba kuti maitiro emvura/kupererwa nemvura mumuviri wemasamples e HEC anonyanya kudzorwa nemapoka avo anotsiviwa.
Kukosha kwe nH kwemuenzaniso weHEC kwakakura zviri pachena kupfuura kukosha kwe nH kushoma kweinenge 5 Cellulose ethers dzakadai seMC neHpMC dzinofanira kunyungudutswa mumvura, kunyangwe munzvimbo yekupisa kwakanyanya. Zvisinei, mamorekuru eHEC anonyungudutswa mumvura munzvimbo yekupisa yakakura. Kuenderana kwekushisa kwe nH yemasampuli eHEC ne triglycol (makomputa emuenzaniso e HEC substituents) kwakapfava uye kwakafanana. Izvi zvinoratidza zvakasimba kuti maitiro e hydration/dehydration emasampuli eHEC anodzorwa zvakanyanya nemapoka avo anotsiviwa. Kukosha kwe nH kwemuenzaniso weHEC kwakakura kupfuura kukosha kwe nH kushoma kweinenge 5 Cellulose ethers dzakadai seMC neHpMC dzinofanira kunyungudutswa mumvura, kunyangwe munzvimbo yekupisa kwakanyanya. Zvisinei, mamorekuru eHEC anonyungudutswa mumvura munzvimbo yekupisa yakakura. Kuenderana kwekushisa kwe nH yemasampuli eHEC ne triglycol (makomputa emuenzaniso e HEC substituents) kwakapfava uye kwakafanana.
Izvi zvinoratidza zvakasimba kuti maitiro emvura/kushaikwa kwemvura mumuviri emasamples eHEC anonyanya kudzorwa nemapoka avo anotsiviwa. Mamorekuru eHEC anonyungudika mumvura panguva dzakasiyana-siyana dzekupisa. Kuenderana kwekushisa kwe nH yemasamples eHEC ne triglycol (makonzo emhando yeHEC substituents) hakuna kusimba uye akafanana. Izvi zvinoratidza zvakasimba kuti maitiro emvura/kushaikwa kwemvura mumuviri wemasamples eHEC anonyanya kudzorwa nemapoka avo anotsiviwa.HECmamorekuru anonyungudika mumvura pamhando dzakasiyana dzetembiricha. Kuenderana kwetembiricha kwe nH yemasampuli eHEC ne triglycol (makonzo emhando yeHEC substituents) hakuna kusimba uye akafanana. Izvi zvinoratidza zvakasimba kuti maitiro emvura/kupererwa nemvura mumasampuli eHEC anonyanya kudzorwa nemapoka avo anotsiviwa.
Nguva yekutumira: Kubvumbi-25-2024