I-Hydration ye-hydroxyethyl cellulose ether kwisisombululo esinamanzi

I-Hydroxyethyl cellulose (HEC) ihlala i-soluble kakhulu emanzini kuluhlu olubanzi lobushushu, nakwimimandla yobushushu obuphezulu apho ezinye ii-ethers ze-cellulose ze-non-ionic zekhemikhali ezifana ne-methyl cellulose (MC) kunye ne-hydroxypropyl methyl cellulose (HpMC) zibonisa amanqaku e-turbidity.Ukucacisa unobangela wokunyibilika okuphezulu kwe-HEC, ukuxhomekeka kobushushu bokwakheka kwamanzi nH kwiyunithi nganye yeglucopyran kwiisampulu ze-HEC zavavanywa ngaphaya kolu luhlu lulandelayo lobushushu ukusuka kwi-10 ukuya kwi-70 °C kusetyenziswa imilinganiselo ephezulu kakhulu ye-dielectric spectrum ukuya kwi-50 GHz.
Kule sifundo, iisampulu ze-HEC zavavanywa ngenani le-molar ye-hydroxyethyl substitutions (MS) yeyunithi nganye yepyran ye-glucose ukusuka kwi-1.3 ukuya kwi-3.6.Zonke iisampulu ze-HEC zachithwa emanzini ngaphakathi kwinqanaba lobushushu elihlolwe kwaye libonisa ukuba akukho manqaku e-turbidity.Ixabiso le-nH leesampuli ze-HEC kunye ne-MS 1.3 yi-14 kwi-20 °C, kwaye iyancipha ngokucothayo ngokunyuka kweqondo lokushisa, kwaye ihla ukuya kwi-10 kwi-70 °C.Ixabiso le-PH lesampulu ye-HEC ngokucacileyo likhulu kunobuncinane bexabiso le-nH elibaluleke kakhulu le-approx.I-5 Cellulose ethers ezifana ne-MC kunye ne-HpMC kufuneka inyibilikiswe emanzini, nakwiqondo eliphezulu lobushushu.
Iimolekyuli zeHEC, nangona kunjalo, zinyibilika emanzini kuluhlu olubanzi lobushushu.Ukuxhomekeka kweqondo lokushisa kwe-nH yeesampuli ze-HEC kunye ne-triglycol (i-model compounds ye-HEC substituents) ilula kwaye iyafana enye kwenye.Olu qwalaselo lubonisa ngamandla ukuba ukuziphatha kwe-hydration / dehydration kwiisampuli ze-HEC kulawulwa kakhulu ngamaqela abo afakwe endaweni.I-3 yi-14 ku-20 °C, yehla ngokucothayo njengoko ubushushu bunyuka, kwaye yehla ukuya kwi-10 kwi-70 °C.Ixabiso le-nH lesampulu ye-HEC ngokucacileyo likhulu kunelona xabiso lisezantsi elibalulekileyo le-nH elimalunga.I-5 Cellulose ethers ezifana ne-MC kunye ne-HpMC kufuneka inyibilikiswe emanzini, nakwiqondo eliphezulu lobushushu.Iimolekyuli zeHEC, nangona kunjalo, zinyibilika emanzini kuluhlu olubanzi lobushushu.Ukuxhomekeka kweqondo lokushisa kwe-nH yeesampuli ze-HEC kunye ne-triglycol (i-model compounds ye-HEC substituents) ilula kwaye iyafana enye kwenye.
Olu qwalaselo lubonisa ngamandla ukuba ukuziphatha kwe-hydration / dehydration kwiisampuli ze-HEC kulawulwa kakhulu ngamaqela abo afakwe endaweni.I-3 yi-14 ku-20 °C, yehla ngokucothayo njengoko ubushushu bunyuka, kwaye yehla ukuya kwi-10 kwi-70 °C.Ixabiso le-nH lesampulu ye-HEC ngokucacileyo likhulu kunelona xabiso lisezantsi elibalulekileyo le-nH elimalunga.I-5 Cellulose ethers ezifana ne-MC kunye ne-HpMC kufuneka inyibilikiswe emanzini, nakwiqondo eliphezulu lobushushu.Iimolekyuli zeHEC, nangona kunjalo, zinyibilika emanzini kuluhlu olubanzi lobushushu.Ukuxhomekeka kweqondo lokushisa kwe-nH yeesampuli ze-HEC kunye ne-triglycol (i-model compounds ye-HEC substituents) ilula kwaye iyafana enye kwenye.Olu qwalaselo lubonisa ngamandla ukuba ukuziphatha kwe-hydration / dehydration kwiisampuli ze-HEC kulawulwa kakhulu ngamaqela abo afakwe endaweni.
Ixabiso le-nH lesampulu ye-HEC ngokucacileyo likhulu kunelona xabiso lisezantsi elibalulekileyo le-nH elimalunga.I-5 Cellulose ethers ezifana ne-MC kunye ne-HpMC kufuneka inyibilikiswe emanzini, nakwiqondo eliphezulu lobushushu.Iimolekyuli zeHEC, nangona kunjalo, zinyibilika emanzini kuluhlu olubanzi lobushushu.Ukuxhomekeka kweqondo lokushisa kwe-nH yeesampuli ze-HEC kunye ne-triglycol (i-model compounds ye-HEC substituents) ilula kwaye iyafana enye kwenye.Olu qwalaselo lubonisa ngamandla ukuba ukuziphatha kwe-hydration / dehydration kwiisampuli ze-HEC kulawulwa kakhulu ngamaqela abo afakwe endaweni.Ixabiso le-nH lesampulu ye-HEC ngokucacileyo likhulu kunelona xabiso lisezantsi elibalulekileyo le-nH elimalunga.I-5 Cellulose ethers ezifana ne-MC kunye ne-HpMC kufuneka inyibilikiswe emanzini, nakwiqondo eliphezulu lobushushu.Iimolekyuli zeHEC, nangona kunjalo, zinyibilika emanzini kuluhlu olubanzi lobushushu.Ukuxhomekeka kweqondo lokushisa kwe-nH yeesampuli ze-HEC kunye ne-triglycol (i-model compounds ye-HEC substituents) ilula kwaye iyafana enye kwenye.
Olu qwalaselo lubonisa ngamandla ukuba ukuziphatha kwe-hydration / dehydration kwiisampuli ze-HEC kulawulwa kakhulu ngamaqela abo afakwe endaweni.Iimolekyuli zeHEC zinyibilika emanzini kuluhlu olubanzi lobushushu.Ukuxhomekeka kweqondo lokushisa kwe-nH yeesampuli ze-HEC kunye ne-triglycol (i-model compounds ye-HEC substituents) ilula kwaye iyafana enye kwenye.Olu qwalaselo lubonisa ngamandla ukuba ukuziphatha kwe-hydration / dehydration kwiisampuli ze-HEC kulawulwa kakhulu ngamaqela abo afakwe endaweni.Iimolekyuli zeHEC zinyibilika emanzini kuluhlu olubanzi lobushushu.Ukuxhomekeka kweqondo lokushisa kwe-nH yeesampuli ze-HEC kunye ne-triglycol (i-model compounds ye-HEC substituents) ilula kwaye iyafana enye kwenye.Olu qwalaselo lubonisa ngamandla ukuba ukuziphatha kwe-hydration / dehydration kwiisampuli ze-HEC kulawulwa kakhulu ngamaqela abo afakwe endaweni.