ʻIke ʻoe e pili ana i ka hypromellose?

ʻO Hydroxypropyl methylcellulose (inoa INN: Hypromellose), ua maʻalahi hoʻi me he hypromellose (hydroxypropyl methylcellulose, i hoʻopau ʻia e like meHPMC), he ʻano like ʻole o ka cellulose nonionic i hui pū ʻia. He semi-synthetic, inactive, viscoelastic polymer i hoʻohana mau ʻia ma ke ʻano he lubricant i ka ophthalmology, a i ʻole ma ke ʻano he excipient a excipient paha i nā lāʻau lapaʻau waha, a loaʻa maʻamau i nā huahana kālepa like ʻole.

Ma ke ʻano he mea hoʻohui meaʻai, hiki i ka hypromellose ke pāʻani i kēia mau hana: emulsifier, thickener, suspending agent a me kahi pani no ka gelatin holoholona. ʻO kona code (E-code) ma ka Codex Alimentarius ʻo E464.

Nā waiwai kemika:

ʻO ka huahana pau ohydroxypropyl methylcellulosehe pauda keʻokeʻo a i ʻole keʻokeʻo keʻokeʻo fibrous paʻa, a hele ka nui o ka ʻāpana ma kahi kānana 80-mesh. ʻO ka ratio o ka methoxyl content i ka hydroxypropyl content o ka huahana i hoʻopauʻia heʻokoʻa, a heʻokoʻa ka viscosity, no laila e lilo i mauʻano likeʻole me nā hana likeʻole. Loaʻa iā ia nā hiʻohiʻona o ka hiki ke hoʻoheheʻe ʻia i loko o ka wai anuanu a hiki ʻole ke hoʻoheheʻe ʻia i ka wai wela e like me ka methyl cellulose, a ʻoi aku kona solubility i nā mea hoʻoheheʻe organik ma mua o ka wai. Hiki ke hoʻoheheʻe ʻia i loko o ka methanol anhydrous a me ka ethanol, a hiki ke hoʻoheheʻe ʻia i loko o nā hydrocarbons chlorinated e like me dichloro methane, trichloroethane, a me nā mea hoʻoheheʻe kūlohelohe e like me ka acetone, isopropanol, a me ka waiʻona diacetone. Ke hoʻoheheʻe ʻia i loko o ka wai, e hui pū me nā molekole wai e hana i kahi colloid. Paʻa ia i ka waikawa a me ka alkali, a ʻaʻole pili i ka pae o ka pH = 2 ~ 12. ʻO ka Hypromellose, ʻoiai ʻaʻole ia he mea ʻawaʻawa, hiki ke hoʻopau ʻia a hana ikaika me nā mea hoʻoneʻe.

Hoʻonui ka viscosity o nā huahana HPMC me ka piʻi ʻana o ka neʻe ʻana a me ke kaumaha molekala, a i ka piʻi ʻana o ka mahana, hoʻomaka ka emi ʻana o kona viscosity. Ke hiki i kahi mahana, piʻi koke ka viscosity a puka ka gelation. kiekie o. Paʻa kona ʻoluʻolu wai ma ka lumi wela, koe wale nō hiki ke hoʻohaʻahaʻa ʻia e nā enzymes, a ʻaʻohe mea hoʻohaʻahaʻa i kona viscosity maʻamau. Loaʻa iā ia nā waiwai gelation thermal kūikawā, nā waiwai hana kiʻiʻoniʻoni maikaʻi a me ka hana ʻili.

Ke hana nei:

Ma hope o ka mālama ʻia ʻana o ka cellulose me ka alkali, hiki i ka anion alkoxy i hana ʻia e ka deprotonation o ka hui hydroxyl hiki ke hoʻohui i ka propylene oxide e hana i ka hydroxypropyl cellulose ether; Hiki iā ia ke hoʻohui pū me ka methyl chloride e hana i ka methyl cellulose ether. Hoʻokumu ʻia ka Hydroxypropyl methylcellulose i ka wā e lawe ʻia ai nā hopena ʻelua i ka manawa like.

Ke hoʻohana nei:

ʻO ka hoʻohana ʻana i ka hydroxypropyl methylcellulose e like me nā eter cellulose ʻē aʻe. Hoʻohana nui ʻia ʻo ia e like me ka dispersant, suspending agent, thickener, emulsifier, stabilizer a me ka hoʻopili ʻana i nā ʻano āpau. ʻOi aku ia ma mua o nā cellulose ethers e pili ana i ka solubility, dispersibility, transparency a me ke kūpaʻa enzyme.

I ka ʻoihana meaʻai a me ka lāʻau lapaʻau, hoʻohana ʻia ia ma ke ʻano he mea hoʻohui. Hoʻohana ʻia e like me ka mea hoʻopili, thickener, dispersant, Emollient, stabilizer a me emulsifier. ʻAʻohe ona mea ʻawaʻawa, ʻaʻohe waiwai waiwai, ʻaʻohe hoʻololi metabolic.

Kahi mea hou aʻe,HPMCLoaʻa nā noi i ka polymerization resin synthetic, petrochemical, ceramics, papermaking, ili, cosmetics, coatings, building materials and photosensitive printing plates.