Ke Kino A me Ke Kinomia O Hydroxypropyl Methyl Cellulose

ʻO ka Hydroxypropyl Methylcellulose (HPMC) he polymer versatile me nā waiwai kino a me nā mea kemika i kūpono ia no nā noi ʻoihana like ʻole. Eia kekahi mau waiwai nui o HPMC:

Nā waiwai kino:

1. ʻAno: ʻO ka HPMC maʻamau he keʻokeʻo a keʻokeʻo ʻole, ʻala ʻole, a me ka pauka ʻono ʻole. Loaʻa ia ma nā papa like ʻole, mai ka pauka maikaʻi a hiki i nā granule a i ʻole nā ​​fibers, e pili ana i ka noi i manaʻo ʻia.
2. Solubility: Hiki ke hoʻoheheʻe ʻia ka HPMC i ka wai anuanu, ka wai wela, a me kekahi mau mea hoʻoheheʻe kūlohelohe e like me ka methanol a me ka ethanol. ʻO ka solubility a me ka dissolution rate e pili ana i nā mea e like me ke degere o ka pani ʻana, ke kaumaha molekala, a me ka mahana.
3. Viscosity: Hōʻike nā hoʻonā HPMC i ke ʻano pseudoplastic a i ʻole ka shear-thinning, ʻo ia hoʻi, e emi ana ko lākou viscosity me ka piʻi ʻana o ka shear rate. ʻO ka viscosity o ka HPMC solutions e pili ana i nā ʻāpana e like me ka neʻe ʻana, ke kaumaha molekala, a me ka pae hoʻololi.
4. Hydration: He pili kiʻekiʻe ka HPMC no ka wai a hiki ke hoʻopaʻa a mālama i ka nui o ka wai. Ke hoʻopuehu ʻia i loko o ka wai, hoʻomaʻemaʻe ʻia ka HPMC e hana i nā gel alohilohi a translucent me nā waiwai kahe pseudoplastic.
5. Hana Kiʻiʻoniʻoni: Hiki i nā hāʻina HPMC ke hana i nā kiʻiʻoniʻoni maʻalahi a paʻa i ka wā maloʻo. Hiki i kēia mau kiʻiʻoniʻoni ke hoʻopili maikaʻi i nā substrate like ʻole a hiki ke hāʻawi i nā waiwai pale, ka pale ʻana i ka wai, a me nā waiwai hana kiʻiʻoniʻoni i loko o nā uhi, nā kiʻiʻoniʻoni, a me nā papa lāʻau lapaʻau.
6. Ka nui o ka ʻāpana: Hiki ke ʻokoʻa ka nui o nā ʻāpana HPMC ma muli o ke kaʻina hana a me ka papa. Hiki ke hoʻololi i nā waiwai e like me ka hiki ke kahe, ka hoʻopuehu, a me ke ʻano i loko o nā ʻano.

Nā waiwai kemika:

1. Ke Kino Hana: HPMC he cellulose derivative i loaʻa ma ka etherification o cellulose me propylene oxide a me methyl chloride. ʻO ka hoʻololi ʻana o nā pūʻulu hydroxypropyl a me methyl ma luna o ka iwi kuamoʻo cellulose e hāʻawi i nā waiwai kūʻokoʻa i ka HPMC, e like me ka hoʻoheheʻe wai a me ka hana ma luna.
2. Degree of Substitution (DS): ʻO ka degere o ka hoʻololi ʻana e pili ana i ka helu awelika o nā hui hydroxypropyl a me methyl i hoʻopili ʻia i kēlā me kēia ʻāpana anhydroglucose i ke kaulahao cellulose. ʻOkoʻa nā waiwai DS ma muli o ke kaʻina hana a hiki ke hoʻololi i nā waiwai e like me ka solubility, viscosity, a me ka thermal stability.
3. Paʻa Thermal: Hōʻike ka HPMC i ke kūpaʻa wela maikaʻi ma luna o kahi ākea ākea. Hiki iā ia ke pale i ka hoʻomehana haʻahaʻa i ka wā o ka hana ʻana me ka ʻole o ka hoʻohaʻahaʻa nui ʻana a i ʻole ka nalowale o nā waiwai. Eia naʻe, hiki i ka loaʻa ʻana i nā wela kiʻekiʻe ke alakaʻi i ka hōʻino.
4. Hoʻohālikelike: Ua kūpono ʻo HPMC me kahi ākea o nā mea ʻē aʻe, nā mea hoʻohui, a me nā mea hoʻohui i hoʻohana ʻia i nā formulations. Hiki iā ia ke launa pū me nā polymers ʻē aʻe, surfactants, paʻakai, a me nā mea hana e hoʻololi i nā waiwai e like me ka viscosity, stability, a me ka hoʻokuʻu ʻana i nā kinetics.
5. Hoʻoula Kemika: ʻAʻole kemika ʻo HPMC a ʻaʻole i loaʻa i nā hopena kemika nui ma lalo o ka hana maʻamau a me nā kūlana mālama. Eia nō naʻe, hiki ke hana me nā ʻakika ikaika a i ʻole nā ​​kumu, nā mea hoʻoneʻe, a i ʻole kekahi mau iona metala ma lalo o nā kūlana koʻikoʻi.

He mea nui ka hoʻomaopopo ʻana i nā waiwai kino a me nā kemika o Hydroxypropyl Methylcellulose (HPMC) no ka hoʻokumu ʻana i nā huahana a me ka hoʻokō ʻana i ka hana ma nā noi like ʻole ma waena o nā ʻoihana e like me nā lāʻau lapaʻau, kūkulu hale, meaʻai, nā mea hoʻonaninani, a me nā textiles.