Hydroxypropyl methylcellulose( Ingoa INN:Hypromellulose), whakapotohia hoki heihydroxypropyl methylcellulose (HPMC), he momo momo etero whakauru kore katote cellulose.He polymer hangarua, kore hohe, viscoelastic e whakamahia nuitia ana hei whakahinuhinu i roto i te ophthalmology, hei taapiri, hei awhina ranei i te rongoa waha, ka kitea i roto i nga momo taonga.
Hei taapiri kai, ka taea e te hydroxypropyl methylcellulose te mahi i nga mahi e whai ake nei: te whakaemulsifier, te whakamaroke, te kaihoko whakatara, me te whakakapi mo te gelatin kararehe.Ko tana waehere Codex Alimentarius ko E464.
taonga matū
Ko te hua oti ohydroxypropyl methyl cellulosehe paura ma, he totoka kikokore ma ranei, me te rahi o te matūriki e haere ana i roto i te tatari 80 mata.Ko nga rereketanga rereke o te ihirangi methoxy me te hydroxypropyl me te pokey o te hua kua oti te hanga he momo momo rereke me te rereke o te mahi.Kei a ia nga ahuatanga o te wairewa i roto i te wai matao me te kore e rewa i roto i te wai wera rite ki te methylcellulose, a ko tona whakarewatanga i roto i nga whakarewa waro nui ake i te wai.Ka taea te wairewa i roto i te mewaro anhydrous me te waiwaro, tae atu ki nga waiwaro chlorinated penei i te dichloromethane, trichloroethane, me nga whakarewa waro penei i te acetone, isopropanol, me te waipiro diacetone.Ka rewa ki te wai, ka hono ki nga ngota ngota wai ka hanga he colloid.He pumau ki nga waikawa me nga turanga, kaore e pa ki roto i te awhe pH o 2-12.Ahakoa ko te hydroxypropyl methylcellulose he kore-paitini, he muramura, ka kaha te mahi ki nga waikura [5].
Te pokey oNga hua HPMCka piki ake i te pikinga o te kukū me te taumaha ngota.Ka piki ake te mahana, ka timata te heke o te pokey.Ka tae te pāmahana ki tetahi pāmahana, ka piki ohorere te pokey ka puta te ra.He teitei ake te mahana o te reera o nga hua pokey iti i tera o nga hua pokey teitei.Ko tana wairewa wai he pumau i te pāmahana rūma, a, i te nuinga o te waa kaore he paheketanga o te pokey engari mo te whakahekenga enzymatic.He mea motuhake, he pai te hanga kiriata me te mahi mata.
Whakaritenga
I muri i te maimoatanga o te cellulose ki te kawakore, ka taea te taapiri i te anion alkoxy i hangaia e te hydroxyl deprotonation ki te epoxy propane hei whakaputa.hydroxypropyl cellulose ether;Ka taea hoki te whakamaarama ki te methyl chloride hei whakaputa i te methyl cellulose ether.Ina puta nga tauhohenga e rua i te wa kotahi,hydroxypropyl methyl celluloseka puta.
kaupapa
Te whakamahi ohydroxypropyl methyl cellulosehe rite ki etahi atuethers cellulose, te nuinga whakamahia hei dispersant, māngai whakatārewatanga, thickener, emulsifier, stabilizer, me te adhesive i roto i ngā mara.He pai ake i era atu etero cellulose i runga i te whakarewatanga, te whakamararatanga, te marama, me te aukati i te whaa.
I roto i te ahumahi kai me te rongoa, ka whakamahia hei taapiri.Na te mea ko nga taonga taapiri, nga ahuatanga hanga kiriata, te matotoru me te whakamararatanga i roto i nga wai, me tona kaha ki te aukati i te urunga o te hinu me te pupuri i te makuku, ka whakamahia hei taapiri, hei whakamaarama, hei whakamarara, hei whakaora, hei whakapumau, hei emulsifier.Karekau he paitini, karekau he uara kai, karekau he huringa metabolic.
I tua atu,HPMChe tono i roto i nga tauhohenga polymerization resin synthetic, petrochemicals, ceramics, papermaking, hiako, cosmetics, coatings, building materials, and photosensitive printing plates.
Wā tuku: Sep-04-2023