Ko te Hydroxypropylmethylcellulose (HPMC) he polymer rongonui e whakamahia ana i roto i nga ahumahi penei i te rongoa, te hanga, te kai me te tiaki whaiaro.He ahua whakarereke o te cellulose ka whiwhi ma te tauhohe i te methylcellulose me te propylene oxide.Ko te HPMC he paura ma, he ma ranei, he hongi, he kore reka, he ngawari ki te wairewa ki te wai, ki te waiwaro me etahi atu whakarewa pararopi.Ka korero tenei pepa mo nga tohu hangarau matua o HPMC.
pokey
Ko te Viscosity te tohu hangarau tino nui o HPMC, e whakatau ana i tana whanonga rere me te tono i roto i nga momo ahumahi.He nui te pokey o te HPMC, ko te tikanga he ahua matotoru, he rite ki te honi.Ka taea te whakatika i te pokey o te HPMC ma te huri i te tohu whakakapinga o nga roopu hydroxyl.Ko te teitei o te tohu whakakapinga, ko te teitei ake o te pokey.
Te tohu whakakapinga
Ko te tohu whakakapinga (DS) tetahi atu tohu hangarau nui o HPMC, e tohu ana ki te maha o nga roopu hydroxyl kua whakakapihia e nga roopu hydroxypropyl me nga roopu methyl.Ko te DS o HPMC i te nuinga o te waa mai i te 0.1 ki te 1.7, me te DS teitei ake e tohu ana i nga whakarereketanga nui ake.Ko te DS o te HPMC e pa ana ki te whakarewatanga, te pokey me nga ahuatanga o te kiri.
taumaha ngota
Ko te taumaha ngota ngota o te HPMC he tohu hangarau nui e pa ana ki nga ahuatanga o te tinana me te matū penei i te whakarewatanga, te pokey me te wairewa.Ko te nuinga o te HPMC he taumaha ngota o te 10,000 ki te 1,000,000 Daltons, me nga taumahatanga ngota teitei e tohu ana i nga mekameka polymer roa ake.Ko te taumaha ngota o te HPMC e pa ana ki tona kaha ki te whakapakeke, ki te hanga kiriata me te kaha pupuri wai.
Uara PH
Ko te uara pH o te HPMC he tohu hangarau nui e pa ana ki tona whakarewatanga me te pokey.He wairewa te HPMC i roto i te wairewa waikawa me te kawakore, engari he teitei ake tona pokey i raro i nga tikanga waikawa.Ko te pH o te HPMC ka taea te whakatika ma te taapiri i te waikawa, te turanga ranei.He pH kei waenganui i te 4 me te 9 a HPMC.
ihirangi makuku
Ko te makuku o te HPMC he tohu hangarau nui e pa ana ki te pumau o te rokiroki me te mahi tukatuka.Ko te HPMC he hygroscopic, ko te tikanga ka mimiti i te makuku mai i te hau.Ko te makuku o te HPMC me pupuri i raro iho i te 7% hei whakarite i te pumau me te kounga.Ko te nui o te makuku ka arai ki te whakakao polymer, ki te kopiri me te paheketanga.
ihirangi pungarehu
Ko te ihirangi pungarehu o te HPMC he tohu hangarau nui e pa ana ki tona ma me te kounga.E tohu ana te pungarehu ki te toenga parakore i mahue i muri i te weratanga o te HPMC.Ko te ihirangi pungarehu o te HPMC me iti iho i te 7% hei whakarite i tona ma me te kounga.Ko te nui o te pungarehu e tohu ana kei te noho poke, he poke ranei i roto i te polymer.
Te pāmahana wetewete
Ko te pāmahana reera o HPMC he tohu hangarau nui e pa ana ki tana mahi reera.Ka taea e te HPMC te kiri i raro i etahi ahuatanga o te pāmahana me te kukū.Ka taea te whakatika te pāmahana gelation o HPMC ma te huri i te tohu whakakapinga me te taumaha ngota.Ko te 50 ki te 90°C te pāmahana whakaraerae o HPMC.
hei whakatau
Ko te Hydroxypropylmethylcellulose (HPMC) he polymer multifunctional me te whānuitanga o nga whakaritenga.Ko nga tohu hangarau matua o te HPMC ko te viscosity, te tohu o te whakakapinga, te taumaha ngota, te uara pH, te makuku, te pungarehu pungarehu, te pāmahana gelation, me etahi atu. Ko enei tohu hangarau e pa ana ki nga ahuatanga o te tinana me te matū o HPMC me te whakatau i ana mahi i roto i nga momo ahumahi.Ma te mohio ki enei whakaritenga, ka taea e tatou te whiriwhiri i te momo HPMC tika mo ta tatou tono motuhake me te whakarite i tona kounga me te pumau.
Te wa tuku: Sep-04-2023