ʻO ka Methylcellulose (MC) a me ka Hydroxypropyl Methylcellulose (HPMC) nā mea hoʻohana maʻamau i ka wai-soluble cellulose derivatives, hoʻohana nui ʻia i ka meaʻai, nā lāʻau lapaʻau, ke kūkulu ʻana a me ka mālama pilikino.
1. Nā ʻokoʻa o ka hale
Methylcellulose (MC):
ʻO ka Methylcellulose kahi mea i loaʻa ma ka hoʻololi ʻana i kahi hapa o nā pūʻulu hydroxyl o cellulose me ka methyl (-OCH3).
He mea maʻalahi kona ʻano kemika, i haku ʻia me kahi iwi cellulose a me kahi methyl substituent.
Hydroxypropyl Methylcellulose (HPMC):
Hoʻokumu ʻia ka HPMC ma ka hoʻokomo hou ʻana i kahi mea pani hydroxypropyl (-C3H7O) ma ke kumu o ka methylcellulose.
ʻOi aku ka maikaʻi o kēia hoʻololi ʻana i nā ʻano o ka solubility a me nā ʻano viscosity i ka wai.
2. Hoʻoheheʻe
Hiki ke hoʻoheheʻe ʻia ka Methylcellulose i ka wai anuanu, akā ʻaʻole hiki ke hoʻoheheʻe ʻia i ka wai wela, a ʻike pinepine ʻia ke ʻano colloidal. Hoʻololi kēia i nā waiwai o MC ke piʻi ka mahana.
Hiki ke hoʻoheheʻe maikaʻi ʻia ka Hydroxypropyl Methylcellulose i loko o ka wai anuanu a me ka wai wela, a ʻoi aku ka maikaʻi o kona solubility ma mua o ka methylcellulose. Hiki i ka HPMC ke mālama i kona hikiwawe wai ma nā wela kiʻekiʻe a kūpono i nā noi e koi ana i ka mālama wela.
3. Nā hiʻohiʻona viscosity
He haʻahaʻa haʻahaʻa ko ka Methylcellulose a he kūpono ia no ka hoʻokumu ʻana ʻaʻole koi i ka viscosity kiʻekiʻe.
ʻO ka Hydroxypropyl methylcellulose ka viscosity kiʻekiʻe a hiki ke hoʻololi ʻia ma o ka hoʻololi ʻana i kona kaumaha molecular a me ke degere o ka hoʻololi ʻana. ʻOi aku ka maʻalahi o ka HPMC i nā ʻano noi like ʻole, ʻoi aku hoʻi i ka hana kūkulu a me nā ʻoihana lāʻau.
4. Nā wahi noi
Hoʻohana pinepine ʻia ʻo Methylcellulose i ka ʻoihana meaʻai ma ke ʻano he mānoanoa, emulsifier a me stabilizer, a hoʻohana pū ʻia i kekahi mau huahana lāʻau lapaʻau ma ke ʻano he mea uhi no nā lāʻau lapaʻau.
ʻO ka Hydroxypropyl methylcellulose kahi noi ākea. Ma waho aʻe o ka meaʻai a me nā lāʻau lapaʻau, hoʻohana nui ʻia i nā mea kūkulu hale (e like me ka mortar maloʻo) a me nā huahana mālama pilikino (e like me ka ʻili ʻili a me nā shampoos) ma muli o kāna mau kiʻiʻoniʻoni maikaʻi a me nā waiwai adhesion.
5. Nā hiʻohiʻona hana
Loaʻa i ka Methylcellulose ka paʻa wai maikaʻi a me nā waiwai hana kiʻiʻoniʻoni a hoʻohana pinepine ʻia i nā huahana pono e mālama i ka makū.
ʻO ka Hydroxypropyl methylcellulose ka pale wela maikaʻi a me nā waiwai hana kiʻiʻoniʻoni maikaʻi loa me ka mālama ʻana i ka wai, no laila ʻoi aku ka maikaʻi ma nā noi me ka mālama wela kiʻekiʻe.
6. Ka palekana a me ke kūpaʻa
He mau mea hoʻohui meaʻai ʻole ʻelua a manaʻo ʻia he palekana. Eia naʻe, ʻoi aku ka maikaʻi o ka HPMC ma kekahi mau noi ma muli o kona kūpaʻa maikaʻi a me ka pili.
ʻOkoʻa loa ka Methylcellulose a me ka hydroxypropyl methylcellulose i ka hoʻolālā kemika, solubility, viscosity hiʻohiʻona a me nā wahi noi. ʻO ke kohoʻana i nā mea kūpono e pili pinepine i nā pono o kahi noi kiko'ī. Ua kūpono ʻo MC no nā noi mānoanoa maʻalahi a me ka hoʻopaʻa ʻana, ʻoiai ʻoi aku ka maikaʻi o ka HPMC no nā noi ʻoihana paʻakikī a me nā ʻoihana ma muli o kona hiki ke hoʻololi i ka viscosity.
Ka manawa hoʻouna: Oct-21-2024