Yintoni i-viscosity ye-HPMC?

I-HPMC, okanye i-Hydroxypropyl Methylcellulose, i-polymer yokwenziwa esetyenziswa ngokubanzi kumayeza, ukutya, ukuthambisa kunye nemimandla yokwakha. Ineempawu ezininzi ezigqwesileyo ezifana nokunyibilika, ukuzinza, ukungafihli kunye neepropati zokwenza ifilimu njenge-thickener, i-adhesive, ifilimu yangaphambili, i-agent yokumisa kunye ne-colloid yokukhusela.

Ngokumalunga ne-viscosity ye-HPMC, yingcamango enzima kakhulu kuba i-viscosity ichatshazelwa yizinto ezininzi, ezifana nokugxininiswa, ubunzima be-molecular, i-solvent, iqondo lokushisa kunye ne-shear rate.

Ubudlelwane phakathi kobunzima bemolekyuli kunye ne-viscosity: Ubunzima bemolekyuli ye-HPMC yenye yezinto ezibalulekileyo ezimisela i-viscosity yayo. Ngokubanzi, okukhona ubunzima bemolekyuli buphezulu, kokukhona buphezulu i-viscosity ye-HPMC. Ngoko ke, abavelisi badla ngokubonelela ngeemveliso ze-HPMC ezinobunzima bemolekyuli ezahlukeneyo ukuhlangabezana neemfuno zamashishini ahlukeneyo. Ubunzima bemolekyuli budla ngokuchazwa njengexabiso le-K (elifana ne-K100, i-K200, njl.). Ixabiso elikhulu le-K, liphezulu i-viscosity.

Impembelelo yoxinzelelo: I-viscosity yesisombululo se-HPMC emanzini inyuka ngokunyuka koxinzelelo. Ngokomzekelo, i-concentration ye-1% yesisombululo se-HPMC ingaba ne-viscosity ngamaxesha amaninzi ngaphezu kwesisombululo se-0.5%. Oku kuvumela i-viscosity yesisombululo ukuba ilawulwe ngokulungelelanisa uxinaniso lwe-HPMC kwisicelo.

Isiphumo sokunyibilikisa: I-HPMC inokunyibilika emanzini okanye kwizinyibilikisi eziphilayo, kodwa izinyibilikisi ezahlukeneyo zichaphazela i-viscosity yayo. Ngokubanzi, i-HPMC ine-solubility efanelekileyo emanzini kunye ne-viscosity yesisombululo iphezulu, ngelixa i-viscosity kwizinyibilikisi ze-organic iyahluka ngokuxhomekeke kwi-polarity ye-solvent kunye neqondo lokutshintshwa kwe-HPMC.

Impembelelo yobushushu: I-viscosity yesisombululo se-HPMC iyatshintsha kunye nobushushu. Ngokubanzi, i-viscosity yesisombululo se-HPMC iyancipha xa ubushushu bonyuka. Oku kungenxa yokuba ukunyuka kwamaqondo obushushu kukhokelela kwintshukumo ekhawulezayo yeemolekyuli kunye nokwanda kwe-fluidity yesisombululo, esinciphisa i-viscosity.

Impembelelo yesantya sokucheba: Isisombululo se-HPMC silulwelo olungelulo olwaseNewtonian, kwaye i-viscosity yayo iyatshintsha ngereyithi yokucheba. Oku kuthetha ukuba ngexesha lokuvuselela okanye ukupompa, i-viscosity iyatshintsha ngamandla okusebenza. Ngokubanzi, isisombululo se-HPMC sibonisa iimpawu zokucheba, oko kukuthi, i-viscosity iyancipha kumazinga aphezulu okucheba.

Amabanga HPMC kunye neenkcukacha: Amabanga ahlukeneyo iimveliso HPMC kwakhona umahluko omkhulu viscosity. Ngokomzekelo, imveliso ye-HPMC yezinga eliphantsi le-viscosity ingaba ne-viscosity ye-20-100 mPas kwi-concentration ye-2%, ngelixa i-viscosity grade grade HPMC imveliso ingaba ne-viscosity ukuya kwi-10,000-200,000 mPas kwinqanaba elifanayo. Ngoko ke, xa ukhetha i-HPMC, kubalulekile ukukhetha ibakala elifanelekileyo le-viscosity ngokusekelwe kwiimfuno ezithile zesicelo.

Iindlela zovavanyo eziqhelekileyo: I-viscosity ye-HPMC idla ngokulinganiswa nge-viscometer okanye i-rheometer. Iindlela zokuvavanya eziqhelekileyo ziquka i-viscometer ejikelezayo kunye ne-capillary viscometer. Iimeko zokuvavanya ezifana nobushushu, ugxininiso, uhlobo lwe-solvent, njl.

I-viscosity ye-HPMC yiparameter eyinkimbinkimbi echaphazelekayo ngezinto ezininzi, kwaye ukulungiswa kwayo kwenza ukuba isetyenziswe ngokubanzi kwizicelo ezahlukeneyo. Ingaba kukutya, amayeza, izinto zokwakha okanye amashishini okuthambisa, ukuqonda kunye nokulawula i-viscosity ye-HPMC yenye yezinto eziphambili zokuqinisekisa umgangatho wemveliso kunye nokusebenza.