IHydroxypropyl methylcellulose (HPMC)sisixhobo sepolymer esinyibilikayo samanzi esisetyenziswa kakhulu kumayeza, ulwakhiwo, ukutya, izinto zokuthambisa kunye neminye imimandla. Ipropathi yayo ye-viscosity yiparameter ebalulekileyo yokulinganisa ukuziphatha kwayo kwe-rheological phantsi kweemeko ezahlukeneyo. Ukuqonda ipropathi ye-viscosity ye-HPMC yesisombululo samanzi isinceda siqonde ngcono ukuziphatha kwayo kunye nomsebenzi kwizicelo ezahlukeneyo.
1. Ubume beMichiza kunye neempawu ze-HPMC
I-HPMC ifunyenwe ngokuguqulwa kweekhemikhali zeselulosi yendalo, ngokukodwa eyenziwa yi-hydroxypropylation kunye ne-methylation ye-cellulose molekyuli. Kwi-chemical structure ye-HPMC, ukuqaliswa kwe-methyl (-OCH₃) kunye ne-hydroxypropyl (-OCH₂CHOHCH₃) amaqela ayenza i-soluble yamanzi kwaye inamandla okulungelelaniswa kwe-viscosity. Ukusebenza kwe-viscosity yesisombululo sayo samanzi kwiindawo ezahlukeneyo kunye namaqondo okushisa achaphazelekayo kwizinto ezininzi ezifana nobunzima be-molecular, i-degree of substitution, i-concentration concentration, njl.
2. Ubudlelwane phakathi kwe-viscosity kunye nokugxila
I-viscosity ye-AnxinCel®HPMC isisombululo samanzi sihlala sikhula ngokunyuka koxinzelelo. Oku kungenxa yokuba kwiindawo eziphezulu, intsebenziswano phakathi kweeamolekyu iyaphuculwa, okukhokelela ekunyukeni kokumelana nokuhamba. Nangona kunjalo, iimpawu ze-solubility kunye ne-viscosity ye-HPMC emanzini nazo zichatshazelwa bubunzima be-molecular. I-HPMC enobunzima obuphezulu bemolekyuli idla ngokubonisa i-viscosity ephezulu, ngelixa ubunzima obuphantsi bemolekyuli buphantsi.
Kwiindawo eziphantsi: isisombululo se-HPMC sibonisa i-viscosity ephantsi kwiindawo ezisezantsi (ezifana ne-0.5%). Ngeli xesha, intsebenziswano phakathi kweeamolekyu ibuthathaka kwaye ulwelo lulungile. Ngokuqhelekileyo isetyenziswa kwizicelo ezifana neengubo kunye nokukhululwa okuqhubekayo kweziyobisi.
Kwiindawo eziphezulu: kwiindawo eziphezulu (ezifana ne-2% okanye ngaphezulu), i-viscosity ye-HPMC isisombululo se-aqueous yanda kakhulu, ibonisa iimpawu ezifana ne-colloidal solutions. Ngeli xesha, i-fluidity yesisombululo ixhomekeke ekuchaseni okukhulu.
3. Ubudlelwane phakathi kwe-viscosity kunye nobushushu
I-viscosity yesisombululo se-aqueous HPMC sinovakalelo kakhulu kubushushu. Njengoko iqondo lobushushu landa, intshukumo phakathi kweemolekyuli zamanzi iyanda, kwaye intsebenziswano phakathi kweemolekyuli zeHPMC iba buthathaka, nto leyo ebangela ukuncipha kwe-viscosity. Olu phawu lwenza usetyenziso lwe-HPMC kumaqondo obushushu ahlukeneyo lubonise ukulungelelaniswa okuqinileyo. Ngokomzekelo, phantsi kweemeko eziphezulu zokushisa, i-viscosity ye-HPMC iyancipha, eyona nto ibaluleke kakhulu kwinkqubo yamachiza, ngakumbi kwiifom ze-dosage yokukhululwa kweyeza, apho utshintsho lobushushu lunokuchaphazela ukuzinza kunye nesiphumo sesisombululo.
4. Impembelelo ye-pH kwi-Viscosity
I-viscosity yesisombululo se-aqueous se-HPMC sinokuchaphazeleka kwakhona ngexabiso le-pH yesisombululo. Nangona i-HPMC yinto engeyiyo i-ionic, i-hydrophilicity yayo kunye neempawu ze-viscosity zichatshazelwa kakhulu yi-molecular structure kunye nesisombululo semeko. Nangona kunjalo, phantsi kweemeko ze-acidic kakhulu okanye i-alkaline, i-solubility kunye nesakhiwo se-molecular ye-HPMC inokutshintsha, ngaloo ndlela ichaphazela i-viscosity. Ngokomzekelo, phantsi kweemeko ze-acidic, i-solubility ye-HPMC ingaba buthathaka kancinane, okukhokelela ekunyuseni kwe-viscosity; ngelixa phantsi kweemeko zealkaline, i-hydrolysis yezinye i-HPMC inokubangela ukuba ubunzima bayo be-molecular bunciphe, ngokunciphisa i-viscosity yayo.
5. Ubunzima beMolekyuli kunye neViscosity
Ubunzima bemolekyuli yenye yezinto ezibalulekileyo ezichaphazela i-viscosity yesisombululo se-aqueous HPMC. Ubunzima bemolekyuli obuphezulu bonyusa ukudibanisa kunye nokudibanisa phakathi kweeamolekyu, okubangela ukwanda kwe-viscosity. Ubunzima bemolekyuli ephantsi i-AnxinCel®HPMC inokunyibilika okungcono emanzini kunye ne-viscosity esezantsi. Iimfuno ezahlukeneyo zesicelo zidla ngokufuna ukhetho lwe-HPMC enobunzima obuhlukeneyo bemolekyuli. Ngokomzekelo, kwi-coatings kunye ne-adhesives, ubunzima obuphezulu be-molecular HPMC budla ngokukhethwa ukunamathela okungcono kunye nokumanzi; ngelixa kumalungiselelo amayeza, ubunzima bemolekyuli ephantsi i-HPMC ingasetyenziselwa ukulawula izinga lokukhululwa kwamachiza.
6. Ubudlelwane phakathi kwesantya sokucheba kunye ne-viscosity
I-viscosity yesisombululo samanzi se-HPMC idla ngokutshintsha ngesantya sokucheba, ebonisa ukuziphatha okuqhelekileyo kwepseudoplastic rheological. I-Pseudoplastic fluid lulwelo oluthi i-viscosity yayo iyancipha ngokuthe ngcembe ngokunyuka kwesantya sokucheba. Olu phawu lwenza ukuba isisombululo se-HPMC sigcine i-viscosity ephezulu ngesantya esisezantsi sokucheba xa sisetyenziswa, kunye nokuphucula ulwelo ngesantya esiphezulu sokucheba. Ngokomzekelo, kwishishini lokugubungela, isisombululo se-HPMC sihlala sidinga ukubonisa i-viscosity ephezulu kwizinga eliphantsi lokucheba xa lisetyenziselwa ukuqinisekisa ukunamathela kunye nokulinganisa kwengubo, ngelixa ngexesha lenkqubo yokwakha, kuyimfuneko ukunyusa izinga lokucheba ukuze liyenze amanzi amaninzi.
7. Isicelo kunye neempawu ze-viscosity ze-HPMC
Iimpawu ze-viscosity zeHPMCyenza ukuba isetyenziswe ngokubanzi kwiindawo ezininzi. Ngokomzekelo, kwishishini lamachiza, i-HPMC isetyenziswa rhoqo njenge-agent-release-release agent, kwaye umgaqo wayo we-viscosity usetyenziselwa ukulawula izinga lokukhululwa kweyeza; kushishino lokwakha, i-HPMC isetyenziswa njenge-thickener yokuphucula ukusebenza kunye ne-fluidity yodaka kunye ne-adhesives; kushishino lokutya, i-HPMC ingasetyenziswa njenge-thickener, emulsifier kunye ne-stabilizer ukuphucula incasa kunye nenkangeleko yokutya.
Iimpawu ze-viscosity ze-AnxinCel®HPMC isisombululo samanzi singundoqo kwisicelo sayo kwiinkalo ezahlukeneyo. Ukuqonda ubudlelwane bayo kunye nezinto ezinje ngoxinaniso, ubushushu, i-pH, ubunzima bemolekyuli kunye nesantya sokucheba kubaluleke kakhulu ekuphuculeni ukusebenza kwemveliso kunye nokuphucula iziphumo zesicelo.
Ixesha lokuposa: Jan-27-2025