Te Hydroxypropyl methylcellulose (HPMC)He tino pai te mahi a te kiriata, engari nā te mea he kirikiri wera te HPMC, he iti rawa te matotoru i te pāmahana iti, kāore e pai mō te paninga (te tuku rānei) me te whakamaroke i te pāmahana iti hei whakarite i te kiriata kai, ka hua ake he mahi tukatuka ngoikore; hei tāpiri, ko tōna utu nui ka whakawhāiti i tana tono. He kirikiri makariri iti te utu o te māngaro Hydroxypropyl (HPS), ka taea e tana tāpiri te whakanui ake i te matotoru o te HPMC i te pāmahana iti, te whakapai ake i te mahi tukatuka o te HPMC, me te whakaiti i te utu whakaputa, ā, ko te hydrophilicity ōrite, ngā waeine huka me ngā rōpū hydroxypropyl katoa e whai wāhi ana ki te whakapai ake i te hototahitanga o ēnei polymer e rua. Nō reira, i whakaritea he pūnaha ranunga kirikiri wera-matao mā te whakaranu i te HPS me te HPMC, ā, i rangahauhia te pānga o te pāmahana ki te hanganga kirikiri o te pūnaha ranunga kirikiri wera-matao HPMC/HPS mā te whakamahi i te rheometer me ngā tikanga marara X-ray koki iti. , me te awe o ngā tikanga maimoatanga wera ki te hanganga moroiti me ngā āhuatanga o te pūnaha membrane, kātahi ka hangaia te whanaungatanga i waenga i te hanganga kirikiri o te pūnaha ranunga-hanganga membrane-āhuatanga membrane i raro i ngā tikanga maimoatanga wera.
E whakaatu ana ngā hua i te pāmahana teitei, ko te gel me te teitei akeHPMCHe nui ake te modulus o te ihirangi me te whanonga totoka-rite, he kikī ake te hanganga rite-ake o ngā kaiwhakamarara tiēre, ā, he nui ake te rahi o ngā kohikohinga tiēre; i te pāmahana iti, he nui ake te modulus o te ihirangi HPS o ngā tauira tiēre teitei, he kitea ake te whanonga totoka-rite, ā, he kikī ake te hanganga rite-ake o ngā kaiwhakamarara tiēre. Mō ngā tauira he ōrite te ōwehenga whakaranu, he teitei ake te hiranga o te modulus me te whanonga totoka-rite me te kiato hanganga rite-ake o ngā tiēre e whakahaerehia ana e te HPMC i te pāmahana teitei i ērā e whakahaerehia ana e te HPS i te pāmahana iti. Ka pā te pāmahana whakamaroke ki te hanganga tiēre o te pūnaha i mua i te whakamaroke, kātahi ka pā ki te hanganga tioata me te hanganga kore-āhua o te kiriata, ā, i te mutunga ka pā nui ki ngā āhuatanga miihini o te kiriata, ka hua ake te kaha kume me te modulus o te kiriata kua maroke i te pāmahana teitei. He teitei ake i te maroke i te pāmahana iti. Kāore he pānga kitea o te tere whakamatao ki te hanganga tioata o te pūnaha, engari he pānga ki te kiato o te tinana rite-ake o te kiriata. I roto i tēnei pūnaha, ka pā te kiato o te hanganga rite-ake o te kiriata ki ngā āhuatanga miihini o te kiriata. He nui te pānga o te mahi.
I runga i te whakaritenga o te kiriuhi whakaranu, i kitea e te rangahau ko te whakamahinga o te otinga iodine hei tae whiriwhiri i te kiriuhi whakaranu HPMC/HPS i whakatū i tētahi tikanga hou mō te tirotiro mārama i te tohatoha āhua me te whakawhiti āhua o te pūnaha whakaranu i raro i te karuārai. tikanga, he tikanga ārahi tikanga mō te ako i te tohatoha āhua o ngā pūnaha ranunga māngaro. Mā te whakamahi i tēnei tikanga rangahau hou, me te tirotiro irahiko whero-whero, te karuārai hiko matawai me te ine whānui, i tātarihia, i akohia hoki te whakawhiti āhua, te hototahitanga me ngā āhuatanga miihini o te pūnaha, ā, i hangaia te hototahitanga, te whakawhiti āhua me te āhua o te kiriata. hononga i waenga i te mahi. E whakaatu ana ngā hua tirotiro karuārai ka pāngia te pūnaha e te whakawhiti āhua ina 50% te ōwehenga HPS, ā, kei roto i te kiriata te āhuatanga whakaranu ā-wāhanga, e tohu ana he taumata hototahitanga tō te pūnaha; mā te tātari whero-whero, te tātari wera-rahi me ngā hua SEM ka whakaū anō i te whakaranu. He taumata hototahitanga tō te pūnaha. Ka huri te modulus o te kiriata whakaranu ina 50% te ihirangi HPS. InaHPSKi te nui ake te ihirangi i te 50%, ka rerekē te koki whakapā o te tauira whakaranu mai i te rārangi tika e hono ana i ngā koki whakapā o ngā tauira parakore, ā, ki te iti iho i te 50%, ka rerekē kino mai i tēnei rārangi tika. , ko te nuinga o ēnei e puta mai ana i ngā whakawhiti āhuahanga.
Wā tuku: Paenga-whāwhā-25-2024