He aha nā ʻano kino o ka hydroxypropyl methylcellulose?

1. ʻAno a me ka hiki ke hoʻoheheʻe ʻia

ʻO ka HPMC maʻamau he pauka keʻokeʻo a keʻokeʻo paha, ʻaʻohe ʻala, ʻono ʻole a ʻaʻohe mea ʻawahia. Hiki ke hoʻoheheʻe ʻia i loko o ka wai anuanu a me kekahi mau mea hoʻoheheʻe organik (e like me nā mea hoʻoheheʻe i hui ʻia e like me ka ethanol/wai a me ka acetone/wai), akā ʻaʻole hiki ke hoʻoheheʻe ʻia i loko o ka ethanol maʻemaʻe, ether a me chloroform. Ma muli o kona ʻano non-ionic, ʻaʻole ia e hana i ka hopena electrolytic i loko o ka hopena wai a ʻaʻole e hoʻopilikia nui ʻia e ka waiwai pH.

2. Ka mānoanoa a me ka rheology

He mānoanoa maikaʻi a me ka thixotropy ka hopena wai HPMC. He ʻokoʻa nā viscosities o nā ʻano like ʻole o AnxinCel®HPMC, a ʻo ka laulā maʻamau he 5 a 100000 mPa·s (2% hopena wai, 20°C). Hōʻike kāna hopena i ka pseudoplasticity, ʻo ia hoʻi, ka hanana lahilahi shear, a kūpono ia no nā hiʻohiʻona noi e like me nā uhi, nā slurries, nā adhesives, a me nā mea ʻē aʻe e pono ai ka rheology maikaʻi.

3. Hoʻoheheʻe wela

Ke hoʻomehana ʻia ka HPMC i ka wai, e emi ana ka moakaka o ka hopena a hoʻokumu ʻia ka gel ma kahi mahana. Ma hope o ka hoʻomaʻalili ʻana, e hoʻi ke kūlana gel i ke kūlana hopena. Loaʻa i nā ʻano HPMC like ʻole nā ​​​​mahana gel like ʻole, ma waena o 50 a me 75°C. He mea nui loa kēia waiwai i nā noi e like me ke kūkulu ʻana i ka mortar a me nā capsules lāʻau lapaʻau.

4. Hana ʻilikai

No ka mea, aia nā hui hydrophilic a me hydrophobic i loko o nā molekala HPMC, hōʻike lākou i kekahi hana ʻili a hiki ke pāʻani i kahi hana emulsifying, dispersing a me stabilizing. No ka laʻana, i loko o nā uhi a me nā emulsions, hiki i ka HPMC ke hoʻomaikaʻi i ke kūpaʻa o ka emulsion a pale i ka sedimentation o nā ʻāpana pigment.

5. Hygroscopicity

Loaʻa i ka HPMC kahi hygroscopicity a hiki ke omo i ka makū i loko o kahi ʻano pulu. No laila, i kekahi mau noi, pono e uku ʻia ka nānā ʻana i ka sila ʻana o ka ʻōpala e pale aku i ka omo ʻana o ka makū a me ka hōʻuluʻulu ʻana.

6. Waiwai hana kiʻiʻoniʻoni

Hiki i ka HPMC ke hana i kahi kiʻiʻoniʻoni paʻakikī a moakaka, kahi i hoʻohana nui ʻia i ka meaʻai, nā lāʻau lapaʻau (e like me nā mea uhi) a me nā uhi. No ka laʻana, i ka ʻoihana lāʻau lapaʻau, hiki ke hoʻohana ʻia ke kiʻiʻoniʻoni HPMC ma ke ʻano he uhi papa e hoʻomaikaʻi i ke kūpaʻa o ka lāʻau a me ka hoʻokuʻu ʻana i ka kaohi.

7. Biocompatibility a me ka palekana

ʻAʻohe ʻawahia a ʻino ʻole ka HPMC, a hiki ke hoʻololi palekana ʻia e ke kino kanaka, no laila ua hoʻohana nui ʻia ia ma nā kahua o ka lāʻau lapaʻau a me ka meaʻai. Ma ke ʻano he mea hoʻohui lāʻau lapaʻau, hoʻohana pinepine ʻia ia e hana i nā papa hoʻokuʻu mau, nā pūpū capsule, a pēlā aku.

8. ke kūpaʻa pH o ka hopena

He paʻa ka HPMC ma ka pae pH o 3 a 11, ʻaʻole maʻalahi e hoʻohaumia ʻia a hoʻoulu ʻia paha e ka waikawa a me ka alkali, no laila hiki ke hoʻohana ʻia i nā ʻano ʻōnaehana kemika like ʻole, e like me nā mea hana hale, nā huahana kemika o kēlā me kēia lā a me nā ʻano lāʻau lapaʻau.