Masithethe nge-hydroxypropyl methyl celluloseI-HPMCkunye nendlela yokulinganisa i-viscosity yayo. I-viscosity apha ibhekisa kwi-viscosity ebonakalayo, eyindlela ebalulekileyo yokubhekisa kwi-hydroxypropyl methyl cellulose.
Imigangatho. Iindlela eziqhelekileyo zokulinganisa kukulinganisa i-viscosity ejikelezayo, ukulinganisa i-viscosity ye-capillary kunye nokulinganisa i-viscosity yokuwa. Indlela yokumisela i-hydroxypropyl methyl cellulose yayiyi-capillary adhesion.
Indlela yokumisela idigri, kusetyenziswa i-Uchs viscometer. Ngokwesiqhelo ukumisela isisombululo yi-2% yesisombululo samanzi, ifomula yile: V=Kdt. V yi-viscosity kwi-mpa. s kwaye u-K yi-viscometer constant.
U-D bubuninzi kubushushu obungaguqukiyo kwaye u-T lixesha ukusuka phezulu ukuya ezantsi nge-viscometer ngemizuzwana. Le ndlela yokusebenza inzima ngakumbi, ukuba kukho izinto ezinganyibilikiyo.
Amagama kulula ukuwabangela iimpazamo, kunzima ukubona umgangatho we-hydroxypropyl methyl cellulose. Ngoku isetyenziswa kakhulu ukulinganisa i-viscometer ejikelezayo, esetyenziswa ngokubanzi eTshayina.
Ifomula ye-viscometer ye-NDJ-1 yi-η=Kα. η yi-viscosity, ikwakwi-mpa. s, i-K yi-coefficient ye-viscometer, kwaye i-α kukufunda kwesalathisi se-viscometer.
Indlela yokuvavanya i-Hydroxypropyl methyl cellulose 2% viscosity:
1, le ndlela ifanelekile ekumiselweni kwe-dynamic viscosity yee-non-Newtonian fluids (isisombululo se-polymer, i-suspension, i-emulsion dispersion liquid okanye isisombululo se-surfactant, njl.njl.).
2. Izixhobo zombane kunye nezixhobo zombane
2.1 I-Rotary viscometer (i-NdJ-1 kunye ne-NDJ-4 ziyafuneka yi-Chinese Pharmacopoeia)
2.2 Ubushushu obungaguqukiyo ukuhlamba amanzi ukuchaneka kobushushu obungaguqukiyo 0.10C
2.3 Iqondo lokulinganisa ubushushu yi-0.20C, eqinisekiswa rhoqo.
2.4 IiViscometers ezisebenzisa iindlela zokuqinisa imvamisa (ezifana ne-NDJ-1 kunye ne-NDJ-4) mazigcinwe. Ukuchaneka kwe-1%.
8. Isampuli ye-og ilinganiswe ngokuchanekileyo yaze yafakwa kwi-beaker eyomileyo, enomthamo we-400mL ubude. Yongeza malunga ne-100mL yamanzi ashushu angama-80-90 degrees uze uvuse imizuzu eli-10 ukuze yahlulwe.
Yahlula-hlula ngokulinganayo, uxube kwaye wongeze amanzi abandayo ukuya kwi-400mL iyonke. Okwangoku, xuba rhoqo imizuzu engama-30 ukwenza isisombululo se-2% (W/W), uze usifake efrijini ukuze uhlambe umkhenkce uphole ude wenze umkhenkce omncinci phezu komhlaba.
Yikhuphe uyibeke kwitanki yobushushu obungaguqukiyo ukuze ubushushu obuphakathi buhlale bufikelela kwi-20 ℃ 0.1 ℃.
3.1 Ukufakelwa nokusebenza kwesixhobo kufuneka kwenziwe ngokuhambelana nemiyalelo yokusebenza yesixhobo, kwaye i-rotor kunye ne-rotor efanelekileyo kufuneka zikhethwe ngokwemiqolo ye-viscosity yemveliso evavanyiweyo kunye nemigaqo ye-pharmacopoeia phantsi kombhalo wemveliso.
Isantya sokujikeleza.
3.2 Lungisa ubushushu obungaguqukiyo bamanzi ngokwesimiselo esiphantsi kwento nganye yeyeza.
3.3 Imveliso yovavanyo ibekwe kwisikhongozeli esichazwe sisixhobo, kwaye i-Angle (a) yokuphambuka ilinganiswe ngokomthetho emva kwemizuzu engama-30 yobushushu obungaguqukiyo. Cima i-motor kwaye uyiqalise kwakhona ukuze ibonwe kwakhona.
Umahluko phakathi kwamaxabiso aphakathi akufuneki udlule kwi-3%, kungenjalo kufuneka kwenziwe umlinganiselo wesithathu.
3.4 Bala ixabiso eliphakathi leemvavanyo ezimbini ngokwefomula ukuze ufumane i-dynamic viscosity yemveliso evavanyiweyo.
4. Bhala phantsi kwaye ubale
4.1 Bhala phantsi imodeli ye-viscometer ejikelezayo, inombolo ye-rotor kunye nesantya esisetyenzisiweyo, i-viscometer engaguqukiyo (ixabiso lika-K), ubushushu obulinganisiweyo, kunye nomlinganiselo ngamnye. Ixabiso.
Ifomula yokubala ye-4.2
I-Dynamic viscosity (MPa”s)=Ka apho i-K yi-viscometer constant elinganiswa ngolwelo oluqhelekileyo lwe-viscosity eyaziwayo kwaye i-A yi-Angle yokuphambuka
Ixesha leposi: Epreli-25-2024