Hydroxyethyl cellulose (HEC) inoramba ichinyungudika nemvura pamusoro petembiricha yakawanda, kunyangwe munzvimbo dzine tembiricha yepamusoro apo mamwe asiri-ionic akagadziridzwa makemikari cellulose ethers akadai semethyl cellulose (MC) uye hydroxypropyl methyl cellulose (HpMC) inoratidza turbidity mapoinzi.Kujekesa chikonzero chekunyungudika kwepamusoro kweHEC, kutsamira kwekushisa kwemvura inoumbwa nH kune yega yega glucopyran unit muHEC samples yakaongororwa pamusoro peanotevera tembiricha kubva ku10 kusvika 70 °C uchishandisa yakanyanya yakakwira frequency dielectric spectrum zviyero kusvika ku50 GHz.
Muchidzidzo ichi, HEC samples dzakaongororwa nhamba yemolar ye hydroxyethyl substitutions (MS) yega yega glucose pyran unit kubva ku1.3 kusvika ku3.6.Yese HEC samples yakanyungudika mumvura mukati metembiricha yakaongororwa uye haina kuratidza turbidity points.Iyo nH kukosha kweHEC samples ine MS 1.3 ndeye 14 pa 20 °C, uye inoderera zvishoma nezvishoma nekukwira kwekushisa, uye inodonha kusvika 10 pa 70 °C.Iyo PH kukosha kweHEC sampuli sezviri pachena yakakura kupfuura iyo shoma yakakosha nH kukosha kweapprox.5 Cellulose ethers seMC neHpMC inofanirwa kunyungudutswa mumvura, kunyangwe mukupisa kwakanyanya.
HEC mamorekuru, zvisinei, anonyungudika nemvura pamusoro pehupamhi hwetembiricha.Kutsamira kwekushisa kwenH yeHEC samples uye triglycol (model compounds yeHEC substituents) ine unyoro uye yakafanana kune imwe neimwe.Uku kucherechedzwa kunoratidza zvakasimba kuti hydration / dehydration maitiro eHEC samples anonyanya kudzorwa nemapoka avo akatsiviwa.3 iri 14 pa20 °C, inodzikira zvishoma nezvishoma sezvo tembiricha inokwira, uye inodonha kusvika 10 pa70 °C.Iyo nH kukosha kweHEC sampuli sezviri pachena yakakura pane yakaderera yakakosha nH kukosha kweapprox.5 Cellulose ethers seMC neHpMC inofanirwa kunyungudutswa mumvura, kunyangwe mukupisa kwakanyanya.HEC mamorekuru, zvisinei, anonyungudika nemvura pamusoro pehupamhi hwetembiricha.Kutsamira kwekushisa kwenH yeHEC samples uye triglycol (model compounds yeHEC substituents) ine unyoro uye yakafanana kune imwe neimwe.
Uku kucherechedzwa kunoratidza zvakasimba kuti hydration / dehydration maitiro eHEC samples anonyanya kudzorwa nemapoka avo akatsiviwa.3 iri 14 pa20 °C, inodzikira zvishoma nezvishoma sezvo tembiricha inokwira, uye inodonha kusvika 10 pa70 °C.Iyo nH kukosha kweHEC sampuli sezviri pachena yakakura pane yakaderera yakakosha nH kukosha kweapprox.5 Cellulose ethers seMC neHpMC inofanirwa kunyungudutswa mumvura, kunyangwe mukupisa kwakanyanya.HEC mamorekuru, zvisinei, anonyungudika nemvura pamusoro pehupamhi hwetembiricha.Kutsamira kwekushisa kwenH yeHEC samples uye triglycol (model compounds yeHEC substituents) ine unyoro uye yakafanana kune imwe neimwe.Uku kucherechedzwa kunoratidza zvakasimba kuti hydration / dehydration maitiro eHEC samples anonyanya kudzorwa nemapoka avo akatsiviwa.
Iyo nH kukosha kweHEC sampuli sezviri pachena yakakura pane yakaderera yakakosha nH kukosha kweapprox.5 Cellulose ethers seMC neHpMC inofanirwa kunyungudutswa mumvura, kunyangwe mukupisa kwakanyanya.HEC mamorekuru, zvisinei, anonyungudika nemvura pamusoro pehupamhi hwetembiricha.Kutsamira kwekushisa kwenH yeHEC samples uye triglycol (model compounds yeHEC substituents) ine unyoro uye yakafanana kune imwe neimwe.Uku kucherechedzwa kunoratidza zvakasimba kuti hydration / dehydration maitiro eHEC samples anonyanya kudzorwa nemapoka avo akatsiviwa.Iyo nH kukosha kweHEC sampuli sezviri pachena yakakura pane yakaderera yakakosha nH kukosha kweapprox.5 Cellulose ethers seMC neHpMC inofanirwa kunyungudutswa mumvura, kunyangwe mukupisa kwakanyanya.HEC mamorekuru, zvisinei, anonyungudika nemvura pamusoro pehupamhi hwetembiricha.Kutsamira kwekushisa kwenH yeHEC samples uye triglycol (model compounds yeHEC substituents) ine unyoro uye yakafanana kune imwe neimwe.
Uku kucherechedzwa kunoratidza zvakasimba kuti hydration / dehydration maitiro eHEC samples anonyanya kudzorwa nemapoka avo akatsiviwa.HEC mamorekuru anonyungudika mumvura pane yakakura tembiricha renji.Kutsamira kwekushisa kwenH yeHEC samples uye triglycol (model compounds yeHEC substituents) ine unyoro uye yakafanana kune imwe neimwe.Uku kucherechedzwa kunoratidza zvakasimba kuti hydration / dehydration maitiro eHEC samples anonyanya kudzorwa nemapoka avo akatsiviwa.HEC mamorekuru anonyungudika mumvura pane yakakura tembiricha renji.Kutsamira kwekushisa kwenH yeHEC samples uye triglycol (model compounds yeHEC substituents) ine unyoro uye yakafanana kune imwe neimwe.Uku kucherechedzwa kunoratidza zvakasimba kuti hydration / dehydration maitiro eHEC samples anonyanya kudzorwa nemapoka avo akatsiviwa.
Nguva yekutumira: Mar-04-2022