Ko te Hydroxypropyl methylcellulose (ingoa INN: Hypromellose), kua whakarārangitia anō hoki hei hypromellose (hydroxypropyl methylcellulose, kua whakarāpopototia heiHPMC), he momo etera whakauru cellulose kore-ionic. He pūmua viscoelastic haurua-hangai, kore mahi, e whakamahia whānuitia ana hei hinu whakahinuhinu i roto i te ophthalmology, hei mea tāpiri rānei i roto i ngā rongoā ā-waha, ā, e kitea whānuitia ana i roto i ngā hua arumoni.
Hei tāpiri kai, ka taea e te hypromellose te mahi i ēnei mahi: hei emulsifier, hei whakamātotoru, hei kaiwhakatārewa me te whakakapi mō te gelatin kararehe. Ko tōna waehere (E-code) i roto i te Codex Alimentarius ko E464.
Ngā āhuatanga matū:
Ko te hua kua oti ohydroxypropyl methylcelluloseHe paura mā, he totoka muka ma rānei, ā, ka whiti te rahi o te matūriki mā roto i te tatari 80-mesh. He rerekē te ōwehenga o te ihirangi methoxyl ki te ihirangi hydroxypropyl o te hua kua oti, ā, he rerekē te matotoru, nō reira ka noho hei momo momo me ngā mahi rerekē. He rite ōna āhuatanga ki te wairewa i roto i te wai matao, kāore hoki e wairewa i roto i te wai wera ki te methyl cellulose, ā, ko tōna wairewatanga i roto i ngā whakarewa waro he nui ake i te wai. Ka taea te wairewa i roto i te methanol me te ethanol kore wai, ā, ka taea hoki te wairewa i roto i ngā hauwaiwai chlorine pērā i te dichloro methane, te trichloroethane, me ngā whakarewa waro pērā i te acetone, te isopropanol, me te waipiro diacetone. Ina wairewahia ki te wai, ka honoa ki ngā ngota wai hei hanga i te colloid. He pumau ki te waikawa me te alkali, ā, kāore e pāngia i roto i te awhe pH=2~12. Ahakoa kāore he paitini o te hypromellose, he mura, ā, ka tauhohe kaha ki ngā matū whakahāngai.
Ka piki ake te matotoru o ngā hua HPMC me te pikinga o te kukū me te taumaha ngota, ā, ina piki te pāmahana, ka tīmata te heke o tōna matotoru. Ina tae ki tētahi pāmahana, ka piki ohorere te matotoru, ā, ka puta te whakapūkara. teitei o. He pumau tōna wairewa i te pāmahana rūma, engari ka taea te whakapūkara e ngā whākōkī, ā, kāore he āhuatanga whakapūkara o tōna matotoru whānui. He āhuatanga whakapūkara wera motuhake ōna, he āhuatanga hanga kiriata pai, ā, he mahi mata pai.
Te Hanga:
I muri i te tukatuka i te cellulose ki te kawakore, ka taea e te anion alkoxy i hangaia e te deprotonation o te rōpū hydroxyl te tāpiri i te propylene oxide hei whakaputa i te hydroxypropyl cellulose ether; ka taea hoki te whakakotahi me te methyl chloride hei whakaputa i te methyl cellulose ether. Ka puta te Hydroxypropyl methylcellulose ina mahia ngā tauhohenga e rua i te wā kotahi.
Te whakamahi i:
He rite te whakamahinga o te hydroxypropyl methylcellulose ki ērā o ētahi atu cellulose ethers. E whakamahia ana hei whakamarara, hei whakatārewatanga, hei whakamātotoru, hei whakaemulsifier, hei whakaū me te whakapiripiri i roto i ngā momo mara. He pai ake i ērā atu cellulose ethers i runga i te wairewatanga, te whakamararatanga, te māramatanga me te ātete ki ngā whākōkī.
I roto i te umanga kai me te rongoā, e whakamahia ana hei tāpiringa. E whakamahia ana hei piripiri, hei whakamātotoru, hei whakamarara, hei whakangāwari, hei whakaū me te whakakōpiri. Kāore he paitini, kāore he uara kai, ā, kāore he huringa pākia.
Hei tāpiritanga,HPMCHe tono kei roto i te whakapūhui kapia hangai, ngā matū hinu, ngā uku, te hanga pepa, te hiako, ngā mea whakapaipai, ngā paninga, ngā rauemi hanga me ngā pereti tā whakaahua-ataata.
Wā tuku: Paenga-whāwhā-25-2024