He mea koʻikoʻi nā haʻawina Rheological o Hydroxypropyl Methylcellulose (HPMC) ʻōnaehana mānoanoa no ka hoʻomaopopo ʻana i kā lākou ʻano i nā noi like ʻole, mai ka lāʻau lapaʻau i ka meaʻai a me nā mea hoʻonaninani. ʻO ka HPMC he cellulose ether derivative i hoʻohana nui ʻia ma ke ʻano he mea mānoanoa, stabilizer, a me emulsifier ma muli o kona hiki ke hoʻololi i nā waiwai rheological o nā hopena a me nā hoʻokuʻu.
1. ʻO nā Ana Viscosity:
ʻO Viscosity kekahi o nā waiwai rheological kumu nui i aʻo ʻia ma nā ʻōnaehana HPMC. Hoʻohana ʻia nā ʻano hana like ʻole e like me rotational viscometry, capillary viscometry, a me oscillatory rheometry e ana i ka viscosity.
Hōʻike kēia mau haʻawina i ka hopena o nā mea e like me ka HPMC concentrate, molecular weight, degere o ka pani ʻana, ka mahana, a me ka shear rate on viscosity.
He mea koʻikoʻi ka hoʻomaopopo ʻana i ka viscosity ʻoiai ʻo ia ka mea e hoʻoholo ai i ke ʻano kahe, kūpaʻa, a me ka hoʻohana pono ʻana o nā ʻōnaehana mānoanoa HPMC.
2. ʻO ke ʻano ʻāhiʻi:
Hōʻike maʻamau nā ʻoluʻolu HPMC i ke ʻano shear-thinning, ʻo ia hoʻi ke emi nei ko lākou viscosity me ka piʻi ʻana o ka shear rate.
Hoʻopili nā haʻawina Rheological i ka nui o ka shear-thinning a me kona hilinaʻi ʻana i nā mea like me ka polymer concentration a me ka mahana.
He mea koʻikoʻi ka ʻike ʻana i ke ʻano shear-thinning no nā noi e like me nā uhi a me nā adhesives, kahi e kahe ai i ka wā o ka noi a me ke kūpaʻa ma hope o ka noi ʻana he mea koʻikoʻi.
3. Thixotropy:
ʻO Thixotropy e pili ana i ka hoʻihoʻi ʻana o ka viscosity i ka manawa ma hope o ka wehe ʻana i ke koʻikoʻi shear. He nui nā ʻōnaehana HPMC e hōʻike ana i ka ʻano thixotropic, ʻoi aku ka maikaʻi ma nā noi e koi ana i ka kahe a me ka paʻa.
ʻO nā haʻawina Rheological e pili ana i ke ana ʻana i ka hoʻihoʻi hou ʻana o ka viscosity i ka manawa ma hope o ka waiho ʻana i ka ʻōnaehana i ke koʻikoʻi shear.
ʻO ka hoʻomaopopo ʻana i ka thixotropy kōkua i ka hoʻokumu ʻana i nā huahana e like me nā pena, kahi mea nui ka paʻa i ka wā mālama a me ka maʻalahi o ka noi.
4. ʻO ka hui ʻana:
Ma nā kiʻekiʻe kiʻekiʻe a i ʻole me nā mea hoʻohui kikoʻī, hiki i nā hopena HPMC ke hana i ka gelation, e hana ana i kahi ʻōnaehana pūnaewele.
Ke noiʻi nei nā haʻawina Rheological i ka hana gelation e pili ana i nā mea e like me ka neʻe ʻana, ka mahana, a me ka pH.
He mea koʻikoʻi nā haʻawina Gelation no ka hoʻolālā ʻana i nā ʻano lāʻau lapaʻau hoʻokuʻu mau ʻia a me ka hoʻokumu ʻana i nā huahana paʻa gel i ka ʻoihana meaʻai a me nā ʻoihana mālama pilikino.
5. Hoʻohālike Hoʻolālā:
Hāʻawi nā ʻenehana e like me ka liʻiliʻi liʻiliʻi X-ray scattering (SAXS) a me rheo-SAXS i nā ʻike i ka microstructure o nā ʻōnaehana HPMC.
Hōʻike kēia mau haʻawina i ka ʻike e pili ana i ka conformation kaulahao polymer, ka hana aggregation, a me ka launa pū ʻana me nā molekole solvent.
ʻO ka hoʻomaopopo ʻana i nā hiʻohiʻona hoʻolālā e kōkua i ka wānana ʻana i ke ʻano rheological macroscopic a me ka hoʻoponopono ʻana i nā ʻano no nā waiwai i makemake ʻia.
6.Dynamic Mechanical Analysis (DMA):
ʻIke ʻo DMA i nā waiwai viscoelastic o nā mea ma lalo o ka deformation oscillatory.
ʻO nā haʻawina Rheological e hoʻohana ana i ka DMA e wehewehe i nā ʻāpana e like me ka modulus storage (G'), ka modulus poho (G"), a me ka viscosity paʻakikī e like me ka hana o ka pinepine a me ka mahana.
He mea maikaʻi loa ka DMA no ka hōʻike ʻana i ke ʻano paʻa a me ka wai-like o ka HPMC gels a pastes.
7. Haʻawina Kūikawā-Application:
Hoʻopili ʻia nā haʻawina Rheological i nā noi kikoʻī e like me nā papa lāʻau lapaʻau, kahi i hoʻohana ʻia ai ka HPMC ma ke ʻano he mea hoʻopaʻa, a i ʻole i nā huahana meaʻai e like me nā kīʻaha a me nā lole, kahi e hana ai ma ke ʻano he mānoanoa a me ka stabilizer.
Hoʻopili kēia mau haʻawina i nā ʻano hoʻohālikelike HPMC no nā waiwai kahe i makemake ʻia, ke ʻano, a me ka paʻa o ka papa, e hōʻoia ana i ka hana huahana a me ka ʻae ʻana o ka mea kūʻai.
He kuleana koʻikoʻi nā haʻawina rheological i ka hoʻomaopopo ʻana i ke ʻano paʻakikī o nā ʻōnaehana mānoanoa HPMC. Ma ka wehewehe ʻana i ka viscosity, shear-thinning, thixotropy, gelation, structural features, and application-specific properties, kēia mau haʻawina e hoʻomaʻamaʻa i ka hoʻolālā ʻana a me ka optimization o nā ʻano hoʻokumu HPMC ma waena o nā ʻoihana like ʻole.
Ka manawa hoʻouna: Mei-10-2024