ʻO ka Hydroxypropyl Methylcellulose (HPMC)a meʻO ka Methyl Hydroxyethyl Cellulose (MHEC)ʻelua o nā ethers cellulose i hoʻohana nui ʻia i loaʻa mai ka cellulose kūlohelohe, kahi polymer i loaʻa i loko o nā paia cell o nā mea kanu. Hoʻololi ʻia kēia mau hui ma o nā kaʻina hana kemika e hana i nā mea e hōʻike ana i ka mānoanoa, ka paʻa ʻana o ka wai, ka hoʻokumu ʻana o ka ʻili, a me nā waiwai hoʻopaʻa. ʻOiai ke kaʻana like nei lākou i nā ʻano hana like, ʻokoʻa lākou i ke ʻano kemika, nā waiwai, nā noi, a me ka hana ma lalo o nā kūlana like ʻole.

1. Ka Hoʻohuihui Kemika a me ke ʻAno

HPMC (Hydroxypropyl Methylcellulose)

ʻO HPMC kahi ʻetera cellulose non-ionic i hana ʻia ma ka hoʻopili ʻana i ka cellulose me ka methyl chloride a me ka propylene oxide. Ua pani hapa ʻia nā hui hydroxyl (-OH) ma ke kuamoʻo cellulose e nā hui methoxy (-OCH₃) a me hydroxypropyl (-CH₂CHOHCH₃).

MHEC (Methyl Hydroxyethyl Cellulose)

Ma ka ʻaoʻao ʻē aʻe, ua hana ʻia ʻo MHEC ma ka hoʻopili ʻana i ka cellulose me ka ethylene oxide a me ka methyl chloride. Hoʻolauna kēia i nā hui methoxy (-OCH₃) a me hydroxyethyl (-CH₂CH₂OH).

Nā ʻokoʻa koʻikoʻi ma ke ʻano:

Loaʻa i ka HPMC nā pani hydroxypropyl, ʻoiai aia i loko o ka MHEC nā hui hydroxyethyl.

Hoʻopilikia ke ʻano o ka hui ether i ka hydrophilicity, solubility, a me ke ʻano gelation thermal.

ʻAno Viscosity: Loaʻa nā HPMC a me MHEC i nā ʻano viscosity like ʻole, i hana ʻia no nā noi like ʻole. Eia nō naʻe, hoʻopilikia ka ʻano molekala i ke ʻano o ka viscosity i loko o ka hopena. Hāʻawi pinepine ʻo HPMC i ka gelation thermal maikaʻi a me ka viscosity kūlike ma luna o kahi laulā pH ākea.

3. Nā Waiwai Hana

Ka Paʻa ʻana o ka Wai:

He mau mea hoʻopaʻa wai maikaʻi loa nā mea ʻelua, he mea nui ia i nā ʻōnaehana sima a me ka gypsum. Eia nō naʻe, hāʻawi ka HPMC i ka mālama wai maikaʻi iki, e lilo ia i koho makemake ʻia i nā mortars hui maloʻo, nā mea hoʻopili tile, a me nā renders.

Hopena Mānoanoa:

Loaʻa i ka MHEC kahi mānoanoa a paʻa hoʻi i nā hopena wai, e makemake ʻia ai no nā noi kahi e pono ai ke kahe mau a me ka hana.

Hoʻokumu ʻana i nā kiʻiʻoniʻoni:

Hoʻokumu pinepine ʻo HPMC i nā kiʻiʻoniʻoni ʻoi aku ka maʻalahi a me ka moakāka, ʻoiai ʻo MHEC e hana i nā kiʻiʻoniʻoni palupalu. Hoʻopilikia kēia mau ʻokoʻa i nā noi ma nā uhi ʻili a me nā mea hoʻopili.

Hoʻohuihui wela:

Hoʻopili ʻia ka HPMC i ka gelation thermal, e hana ana i kahi gel i ka wā e hoʻomehana ʻia ai. Hōʻike pū ʻo MHEC i ka gelation thermal, akā i kahi liʻiliʻi. He mea nui loa kēia waiwai i nā noi lāʻau lapaʻau a me nā meaʻai kahi e makemake ʻia ai kahi pale gel a i ʻole ke ʻano.

4. Nā noi

Hoʻohana ʻia ʻo HPMC a me MHEC ma nā ʻano ʻoihana like ʻole. Eia nō naʻe, ʻo kekahi mau ʻano hana e ʻoi aku ka kūpono o kekahi ma mua o kekahi no nā noi kikoʻī.

4.1ʻOihana Kūkulu Hale

HPMC:

Nā mea hoʻopili tile

Nā pāpili sima a me nā mea hoʻoheheʻe

Nā hui hoʻohālikelike ponoʻī

Nā ʻōnaehana hoʻopau insulation waho (EIFS)

Nā pāpili i hoʻokumu ʻia i ka gypsum

Nā Pōmaikaʻi i ke Kūkulu ʻana:

Paʻa wai kiʻekiʻe

ʻOi aku ka maikaʻi o ka manawa wehe i nā mea hoʻopili

Hoʻomaikaʻi ʻia ka hana

MHEC:

Nā ʻaʻahu ʻili

Pālaki māmā

Nā mea hoʻopili pepa paia

Nā hui hui i hui mua ʻia

Nā Pōmaikaʻi i ke Kūkulu ʻana:

ʻAno laumania

Nā waiwai hoʻopili maikaʻi

ʻAno hoʻohuihui maʻalahi

4.2 Nā lāʻau lapaʻau

HPMC:

Hoʻohana ʻia ma ke ʻano he mea hoʻopaʻa a me ka mea uhi kiʻiʻoniʻoni i nā papa

Nā ʻōnaehana matrix hoʻokuʻu lāʻau i kāohi ʻia

Nā kulu maka a me nā gels ophthalmic

MHEC:

ʻAʻole i hoʻohana pinepine ʻia ma muli o kona mau waiwai gelation haʻahaʻa, akā pili mau i:

Nā hoʻokuʻu waha

Nā ʻano hana topical

4.3 Nā Pena a me nā Uhi

MHEC:

Makemake pinepine ʻia i nā pena wai ma muli o ke ʻano pseudoplastic kiʻekiʻe (shear-thinning)

Hoʻonui i ka hiki ke pulumu a me ka hoʻopili maʻalahi

HPMC:

Hoʻohana pū ʻia i nā pena, ʻoiai ke koi ʻia nā waiwai paʻa wai kiʻekiʻe a i ʻole nā ​​​​waiwai gelation

D. Nā mea holoi a me ka mālama pilikino

HPMC:

Nā shampoos, nā conditioners, a me nā lotions

Hana ma ke ʻano he mea hoʻomānoanoa a me ka mea hoʻopaʻa

MHEC:

Nā kopa lima a me nā holoi kino

Makemake ʻia no ka hoʻomaikaʻi ʻana i ka moakāka a me ka maʻalahi o ke ʻano hana

4.4ʻOihana Meaʻai

HPMC:

Ua ʻāpono ʻia ma ke ʻano he mea hoʻohui meaʻai (E464)

Hoʻohana ʻia i loko o nā capsules mea kanu, nā huahana berena, a me nā mea ʻono emulsified

Kōkua i ke ʻano a me ke kūpaʻa

MHEC:

ʻAʻole i ʻae nui ʻia no ka hoʻohana ʻana i ka meaʻai; hoʻohana palena ʻia

5. Nā ʻAoʻao Kaiapuni a me nā Hoʻoponopono

ʻAʻohe ʻawahia, biodegradable, a non-ionic ʻo HPMC a me MHEC, e palekana ai no ka hoʻohana ʻana i nā huahana he nui. Eia nō naʻe:

Ua ʻae nui ʻia ʻo HPMC no ka hoʻohana ʻana i nā lāʻau lapaʻau a me ka meaʻai.

Hoʻohana nui ʻia ʻo MHEC i nā hana ʻoihana a me nā mea hoʻonani.

6. Kumukūʻai a me ka Loaʻa

ʻOi aku ka maikaʻi o ke kumukūʻai o MHEC ma mua o HPMC ma muli o kāna kaʻina hana maʻalahi iki a me ka emi ʻana o ke koi ma nā mākeke lāʻau lapaʻau a me nā mākeke meaʻai. Eia nō naʻe, ʻo ka laulā o ka noi o HPMC, ʻoi aku hoʻi i nā ʻoihana i hoʻoponopono ʻia, e hōʻoia i kona kumukūʻai kiʻekiʻe.

I nā ʻōnaehana hana kiʻekiʻe e like me nā mea hoʻopili tile a i ʻole nā ​​​​​​mea hoʻoheheʻe kahi e pono ai ka paʻa ʻana o ka wai a me ka hoʻopili ʻana, makemake ʻia ʻo HPMC. I ka hoʻohālikelike ʻana, no ka hoʻopili maʻalahi a me ka maʻalahi o ka hui ʻana, e like me nā hui hui a i ʻole nā ​​​​​​putties paia, hiki i ka MHEC ke ʻoi aku ka maikaʻi.

ʻOiaiHPMCa meMHEChe mau kemika like nā cellulose ethers, ʻo kā lākou mau hui substituent like ʻole (hydroxypropyl ma HPMC vs. hydroxyethyl ma MHEC) e alakaʻi i nā ʻokoʻa koʻikoʻi i ka hana, ʻoiai ma ke ʻano o ka thermal gelation, ka paʻa ʻana o ka wai, ka hoʻokumu ʻana o ka ʻili, a me ka hoʻohālikelike ʻana o ka noi.