Ka ʻokoʻa ma waena o HPMC a me HEC

He cellulose ka hydroxypropyl methylcellulose a me ka hydroxyethyl cellulose, he aha ka ʻokoʻa ma waena o lāua?

"Ka ʻokoʻa ma waena o HPMC a me HEC"

01 HPMC a me HEC
ʻO Hydroxypropyl methylcellulose (Hypromellose), i ʻike ʻia ʻo hypromellose, he ʻano o ka non-ionic cellulose i hui ʻia eter. He semisynthetic, inactive, viscoelastic polymer i hoʻohana mau ʻia ma ke ʻano he lubricant i ka ophthalmology, a i ʻole he excipient a i ʻole kaʻa i nā lāʻau lapaʻau waha.
ʻO ka Hydroxyethyl cellulose (HEC), ka mea hoʻoheheʻe kemika (C2H6O2)n, he keʻokeʻo a māmā melemele, ʻaʻohe ʻala, ʻaʻohe mea ʻawaʻawa a pauka paʻa i haku ʻia me ka cellulose alkaline a me ka ethylene oxide (a i ʻole chloroethanol) Ua hoʻomākaukau ʻia e ka etherification a no ka non- ionic soluble cellulose ethers. No ka mea he mau waiwai maikaʻi ʻo HEC o ka mānoanoa, hoʻokuʻu, hoʻopuehu, emulsifying, hoʻopaʻa ʻana, hana kiʻiʻoniʻoni, pale i ka wai a me ka hāʻawi ʻana i ka colloid pale, ua hoʻohana nui ʻia i ka ʻimi ʻaila, nā uhi, ke kūkulu ʻana, ka lāʻau lapaʻau a me ka meaʻai, textile, pepa a me ka polymer Polymerization a me nā māla ʻē aʻe, 40 mesh sieving rate ≥ 99%.

02 ʻokoʻa
ʻOiai he cellulose nā mea ʻelua, he nui nā ʻokoʻa ma waena o nā mea ʻelua:
ʻOkoʻa ka Hydroxypropyl methylcellulose a me ka hydroxyethylcellulose i nā waiwai, hoʻohana, a me ka solubility.

1. Nā hiʻohiʻona like ʻole
ʻO Hydroxypropyl methylcellulose: (HPMC) he keʻokeʻo keʻokeʻo like ʻole a i ʻole ka pauka granular, nona nā ʻano like ʻole nonionic cellulose i hui pū ʻia. He semi-synthetic non-living viscoelastic polymer.
ʻO Hydroxyethylcellulose: (HEC) he keʻokeʻo a melemele paha, ʻaʻohe mea ʻala a ʻaʻole ʻona a i ʻole ka pauka paʻa. Hoʻopili ʻia e ka alkaline cellulose a me ka ethylene oxide (a i ʻole chlorohydrin). No ka non-ionic soluble cellulose ether.

2. Solubility ʻokoʻa
Hydroxypropyl methylcellulose: aneane hiki ʻole ke hoʻoheheʻe ʻia i loko o ka ethanol piha, etera a me ka acetone. Hoʻoheheʻe ʻia i loko o ka wai anuanu.
Hydroxyethyl cellulose: Loaʻa iā ia nā waiwai o ka mānoanoa, hoʻokuʻu, hoʻopaʻa, emulsifying, dispersing a me ka moisturizing. Hiki iā ia ke hoʻomākaukau i nā hāʻina ma nā pae viscosity like ʻole a loaʻa ka paʻakai paʻakai maikaʻi loa no nā electrolytes.
ʻO ka Hydroxypropyl methylcellulose nā hiʻohiʻona o ka hiki ke mānoanoa, ke kūpaʻa paʻakai haʻahaʻa, ka paʻa o ka pH, ka paʻa ʻana o ka wai, ke kūpaʻa dimensional, nā waiwai hana kiʻiʻoniʻoni maikaʻi loa, ke kūpaʻa nui o ka enzyme, dispersibility a me ka cohesiveness.

Nui nā ʻokoʻa ma waena o nā mea ʻelua, a ʻokoʻa hoʻi ko lākou pono i ka ʻoihana.

Hoʻohana nui ʻia ka Hydroxypropyl methylcellulose e like me ka mānoanoa, dispersant a me ka stabilizer i ka ʻoihana uhi, a loaʻa ka solubility maikaʻi i ka wai a i ʻole nā ​​mea hoʻoheheʻe organik. I ka ʻoihana kūkulu, hiki ke hoʻohana ʻia i ka sima, gypsum, latex putty, plaster, etc., e hoʻomaikaʻi i ka dispersibility o ke one sima a hoʻomaikaʻi nui i ka plasticity a me ka paʻa ʻana o ka wai o ka mortar.
ʻO ka Hydroxyethyl cellulose nā waiwai o ka mānoanoa, hoʻopaneʻe, hoʻopaʻa, emulsifying, dispersing a me ka moisturizing. Hiki iā ia ke hoʻomākaukau i nā hāʻina ma nā pae viscosity like ʻole a loaʻa ka paʻakai paʻakai maikaʻi loa no nā electrolytes. ʻO ka Hydroxyethyl cellulose kahi kiʻiʻoniʻoni mua, tackifier, thickener, stabilizer a me ka dispersant i nā shampoos, nā lauoho lauoho, neutralizers, conditioners a me nā mea hoʻonaninani; i ka pauka holoi Aia ma ka waena kekahi ʻano mea hoʻihoʻi lepo. Hoʻopau koke ka Hydroxyethyl cellulose i ka wela kiʻekiʻe, hiki ke wikiwiki i ka hana hana a hoʻomaikaʻi i ka hana hana. ʻO ka hiʻohiʻona maopopo o nā mea holoi i loaʻa ka hydroxyethyl cellulose hiki iā ia ke hoʻomaikaʻi i ka maʻalahi a me ka mercerization o nā lole.