Hydroxypropyl methylcellulose(inoa INN:Hypromellulose), i hoopokoleia e like mehydroxypropyl methylcellulose (HPMC), he ʻano ʻano like ʻole o ka ionic cellulose 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 adjunct a excipient paha i ka lāʻau lapaʻau waha, ʻike pinepine ʻia i nā ʻano mea kūʻai.
Ma ke ʻano he mea hoʻohui meaʻai, hiki i ka hydroxypropyl methylcellulose ke pāʻani i kēia mau hana: emulsifier, thickener, suspension agent, a me kahi pani no ka gelatin holoholona.ʻO kāna codex Alimentarius code ʻo E464.
waiwai kemika
ʻO ka huahana pau ohydroxypropyl methyl cellulosehe pauda keʻokeʻo a i ʻole keʻokeʻo keʻokeʻo fibrous paʻa, me ka nui o nā ʻāpana e hele ana ma kahi kānana 80 mesh.ʻO nā lakio like ʻole o ka methoxy a me ka hydroxypropyl content a me ka viscosity o ka huahana i hoʻopau ʻia e hana ia i nā ʻano like ʻole me nā ʻokoʻa i ka hana.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 methylcellulose, a ʻoi aku kona hiki ke hoʻoheheʻe ʻia i loko o ka wai.Hiki ke hoʻoheheʻe ʻia i loko o ka methanol anhydrous a me ka ethanol, a me nā hydrocarbons chlorinated e like me dichloromethane, 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, hui pū me nā molekole wai e hana i kahi colloid.Paʻa ia i nā ʻakika a me nā kumu a ʻaʻole pili i ka pae pH o 2-12.ʻOiai ʻo ka hydroxypropyl methylcellulose ʻaʻole ia he mea ʻawaʻawa, hiki ke puhi a hiki ke hana ikaika me nā oxidants [5].
ʻO ka viscosity oNā huahana HPMCpiʻi me ka piʻi ʻana o ka noʻonoʻo a me ke kaumaha molekala.Ke piʻi ka mahana, hoʻomaka ka viscosity e emi iho.Ke piʻi ka mahana i kahi mahana, piʻi koke ka viscosity a puka mai ka gel.ʻOi aku ka kiʻekiʻe o ka mahana gel o nā huahana viscosity haʻahaʻa ma mua o nā huahana viscosity kiʻekiʻe.Paʻa kona ʻano wai ma ka lumi wela a ʻaʻohe hoʻohaʻahaʻa o ka viscosity koe wale nō ka degradation enzymatic.Loaʻa iā ia nā waiwai gelling thermal kūikawā, hana kiʻiʻoniʻoni maikaʻi a me ka hana ʻili.
Hoʻomākaukau
Ma hope o ka mālama ʻia ʻana o ka cellulose me ka alkali, hiki ke hoʻohui ʻia ka anion alkoxy i hana ʻia e ka hydroxyl deprotonation i ka epoxy propane e hana ai.hydroxypropyl cellulose ether;Hiki iā ia ke condense me ka methyl chloride e hana i ka methyl cellulose ether.Ke hele like nā ʻano ʻelua,hydroxypropyl methyl cellulosehana ʻia.
kumu
Ka hoohana ana ohydroxypropyl methyl celluloseua like me kekahicellulose ethers, hoʻohana nui ʻia ma ke ʻano he dispersant, suspension agent, thickener, emulsifier, stabilizer, a hoʻopili i nā ʻano ʻano like ʻole.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.Ma muli o kāna mau waiwai adhesive, nā waiwai hana kiʻiʻoniʻoni, ka mānoanoa a me ka hoʻopuehu ʻana i nā wai, a me kona hiki ke pale i ka komo ʻana o ka ʻaila a mālama i ka maʻa, hoʻohana ʻia ia e like me ka mea hoʻopili, thickener, dispersant, reliever, stabilizer, a me emulsifier.ʻAʻohe ona mea ʻawaʻawa, ʻaʻohe waiwai waiwai, ʻaʻohe hoʻololi metabolic.
Kahi mea hou aʻe,HPMCLoaʻa iā ia nā noi i ka synthetic resin polymerization reactions, petrochemicals, ceramics, papermaking, ili, cosmetics, coatings, building materials, and photosensitive printing plates.
Ka manawa hoʻouna: Sep-04-2023