He aha ka hydroxyethyl methylcellulose?

inoa inoa: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Nā inoa Pelekane: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Kemika: Hydroymethylmethylcellulose;Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.
Kakau inoa CAS: 9032-42-2

Molecule: C2H6O2 xCH4O x PhEur 2002 wehewehe i ka hydroxyethyl methylcellulose he hapa O-methylated, he hapa O-hydroxymethylated cellulose. Hōʻike ʻia nā kikoʻī like ʻole e ka waiwai viscosity ʻike ʻia o 2% w/v aqueous solution ma 20 ° C, a ʻo ka ʻāpana he mPa s.
Kaumaha Molekala: PhEur 2002 wehewehe i ka hydroxyethyl methylcellulose ma ke ʻano he O-methylated ʻāpana, he ʻāpana O-hydroxymethylated cellulose. Hōʻike ʻia nā kikoʻī like ʻole e ka waiwai viscosity ʻike ʻia o 2% w/v aqueous solution ma 20 ° C, a ʻo ka ʻāpana he mPa s.

ʻO nā hiʻohiʻona nui o ka hydroxyethyl methylcellulose (HEMC) he:

1. Solubility: Hiki ke hoʻoheheʻe ʻia i ka wai a me kekahi mau mea hoʻoheheʻe organik. Hiki ke hoʻoheheʻe ʻia ka HEMC i ka wai anuanu. Hoʻoholo ʻia kona ʻano kiʻekiʻe loa e ka viscosity. ʻokoʻa ka solubility me ka viscosity. ʻO ka haʻahaʻa o ka viscosity, ʻoi aku ka nui o ka solubility.

2. Paʻakai paʻakai: HEMC huahana he non-ionic cellulose ethers a 'aʻole polyelectrolytes, no laila, ua 'ano paʻa i ka aqueous solutions ke loaʻa nā paʻakai metala a organik electrolytes, akā excessive hoʻohui electrolytes hiki ke kumu gelation a me ka ua.

3. Ka hana o ka ʻili: Ma muli o ka hana o ka ʻili o ka wai, hiki ke hoʻohana ʻia e like me ka colloidal protection agent, emulsifier a me dispersant.

4. Thermal gel: Ke hoʻomāhana ʻia ka hopena wai wai o ka HEMC i kekahi mahana, lilo ia i opaque, gels, a precipitates, akā i ka wā e hoʻomau mau ʻia, e hoʻi i ke kūlana hoʻonā kumu, a hiki mai ka gel a me ka ua. ʻO ka mahana e hilinaʻi nui ʻia i kā lākou lubricants, nā mea kōkua hoʻomaha, nā colloids pale, emulsifiers, etc.

5. Metabolic inertness a me ka haʻahaʻa ʻala a me ka ʻala: HEMC ua hoʻohana nui ʻia i ka meaʻai a me ka lāʻau lapaʻau no ka mea ʻaʻole e hoʻololi ʻia a he haʻahaʻa haʻahaʻa a he ʻala.

6. ʻO ke kūpaʻa ʻana o ka maʻi: HEMC maikaʻi ke kūpaʻa ʻana i ka pulupulu a me ka paʻa viscosity maikaʻi i ka wā mālama lōʻihi.

7. Paʻa PH: ʻAʻole paʻa ka viscosity o ka wai wai o nā huahana HEMC e ka waikawa a i ʻole ka alkali, a paʻa ka pH waiwai ma ka laulā o 3.0-11.0.
Noi: Hiki ke hoʻohana ʻia ka Hydroxyethyl methylcellulose ma ke ʻano he mea pale colloidal, emulsifier a me ka dispersant ma muli o kāna hana ʻeleʻele i ka wai. ʻO kāna kumu hoʻohālike penei: ka mana o ka hydroxyethyl methylcellulose i ka hana o ka sima. ʻO ka Hydroxyethyl methylcellulose ka pauka keʻokeʻo ʻole, ʻono ʻole, hiki ke hoʻoheheʻe ʻia i loko o ka wai anuanu e hana ai i kahi hopena ʻālohilohi. Loaʻa iā ia nā hiʻohiʻona o ka mānoanoa, hoʻopaʻa, hoʻopuehu, emulsifying, hana kiʻiʻoniʻoni, hoʻopaneʻe, adsorbing, gelling, surface active, mālama i ka moisture a me ka pale ʻana i ka colloid. No ka loaʻa ʻana o ka hana o ka ʻili wai, hiki ke hoʻohana ʻia ma ke ʻano he mea pale colloidal, emulsifier a me dispersant. ʻO ka hydroxyethyl methylcellulose aqueous solution he hydrophilicity maikaʻi a he mea mālama wai kūpono.