He aha ka viscosity o HPMC?

ʻO HPMC, a i ʻole Hydroxypropyl Methylcellulose, he polymer synthetic i hoʻohana nui ʻia i ka lāʻau lapaʻau, meaʻai, hoʻonaninani a me nā kahua kūkulu. Loaʻa iā ia nā waiwai maikaʻi loa e like me ka solubility, stability, transparency a me nā waiwai hana kiʻiʻoniʻoni ma ke ʻano he mānoanoa, adhesive, film mua, suspending agent a me ka colloid pale.

E pili ana i ka viscosity o HPMC, he manaʻo paʻakikī ia no ka mea ua hoʻopili ʻia ka viscosity e nā kumu he nui, e like me ka neʻe ʻana, ke kaumaha molekala, ka mea hoʻoheheʻe, ka mahana a me ka helu shear.

Ka pilina ma waena o ke kaumaha molekala a me ka viscosity: ʻO ke kaumaha molekala o HPMC kekahi o nā mea nui e hoʻoholo ai i kona viscosity. ʻO ka ʻōlelo maʻamau, ʻoi aku ka kiʻekiʻe o ke kaumaha molekala, ʻoi aku ka kiʻekiʻe o ka viscosity o HPMC. No laila, hāʻawi pinepine nā mea hana i nā huahana HPMC me nā paona molekala like ʻole e hoʻokō i nā pono o nā ʻoihana like ʻole. Hōʻike pinepine ʻia ke kaumaha molekala ma ke ʻano he K waiwai (e like me K100, K200, etc.). ʻO ka nui o ka waiwai K, ʻoi aku ka kiʻekiʻe o ka viscosity.

Ka hopena o ka manaʻo: Hoʻonui ka viscosity o ka HPMC solution i ka wai me ka piʻi ʻana o ka ʻike. No ka laʻana, hiki ke loaʻa ka viscosity 1% o ka solution HPMC ma mua o ka 0.5% solution concentration. ʻAe kēia i ka viscosity o ka hoʻonā e hoʻoponopono ʻia ma ka hoʻoponopono ʻana i ka neʻe o ka HPMC i ka noi.

Ka hopena o ka mea hoʻoheheʻe: Hiki ke hoʻoheheʻe ʻia ka HPMC i ka wai a i ʻole nā ​​mea hoʻoheheʻe organik, akā pili nā mea hoʻoheheʻe ʻokoʻa i kona viscosity. ʻO ka mea maʻamau, ʻoi aku ka maikaʻi o ka hoʻoheheʻe ʻana o ka HPMC i ka wai a ʻoi aku ka kiʻekiʻe o ka viscosity solution, ʻoiai ke ʻano o ka viscosity i nā mea hoʻoheheʻe organik e like me ka polarity o ka solvent a me ke degere o ka hoʻololi ʻana o HPMC.

Ka hopena o ka mahana: Hoʻololi ka viscosity o ka hopena HPMC me ka mahana. ʻO ka maʻamau, emi ka viscosity o ka HPMC solution ke piʻi ka mahana. ʻO kēia ke kumu o ka piʻi ʻana o ka mahana e alakaʻi i ka neʻe molecular wikiwiki a hoʻonui i ka wai o ka hopena, e hōʻemi ana i ka viscosity.

Ka hopena o ka nui o ka shear: ʻO ka hopena HPMC he wai non-Newtonian, a hoʻololi kona viscosity me ka shear rate. ʻO ia ke ʻano o ka hoʻoulu ʻana a i ʻole ka pumping, hoʻololi ka viscosity me ka ikaika o ka hana. ʻO ka mea maʻamau, hōʻike ka HPMC solution i nā hiʻohiʻona ʻoki ʻoki, ʻo ia hoʻi, ke emi nei ka viscosity i nā uku ʻoki kiʻekiʻe.

Nā māka HPMC a me nā kikoʻī: Loaʻa i nā māka like ʻole o nā huahana HPMC nā ʻokoʻa nui i ka viscosity. No ka laʻana, he viscosity haʻahaʻa haʻahaʻa HPMC huahana hiki i ka viscosity o 20-100 mPas ma ka 2% kuʻina, oiai he kiʻekiʻe viscosity papa HPMC huahana hiki i ka viscosity a hiki i 10,000-200,000 mPas ma ka ia noonoo. No laila, i ke koho ʻana i ka HPMC, he mea nui e koho i ka māka viscosity kūpono e pili ana i nā koi noi kikoʻī.

Nā ʻano hoʻāʻo maʻamau: E ana ʻia ka viscosity o HPMC e ka viscometer a i ʻole rheometer. ʻO nā ʻano hoʻāʻo maʻamau ka viscometer rotational a me ka viscometer capillary. ʻO nā kūlana hoʻāʻo e like me ka mahana, ka ʻike, ke ʻano solvent, a me nā mea ʻē aʻe hiki ke loaʻa i ka hopena koʻikoʻi i nā hopena, no laila pono e mālama pono ʻia kēia mau ʻāpana i ka wā hoʻāʻo.

ʻO ka viscosity o HPMC he mea paʻakikī i hoʻopili ʻia e nā kumu he nui, a ʻo kona hoʻololi ʻana e hoʻohana nui ʻia i nā noi like ʻole. Inā i loko o ka meaʻai, lāʻau lapaʻau, nā mea kūkulu hale a i ʻole nā ​​​​mea hoʻonaninani, ka hoʻomaopopo ʻana a me ka kāohi ʻana i ka viscosity o HPMC kekahi o nā kumu nui e hōʻoia i ka maikaʻi o ka huahana a me ka hana.