whakauru
Ko ngā etera cellulose he pūmua wai-wai anionic i ahu mai i te cellulose. He maha ngā whakamahinga o ēnei pūmua i roto i ngā ahumahi rerekē pērā i te kai, te rongoā, te whakapaipai, me te hanga nā ō rātou āhuatanga pērā i te whakamātotoru, te whakapūpū, te hanga kiriata, me te whakapūpū. Ko tētahi o ngā āhuatanga tino nui o ngā etera cellulose ko te pāmahana whakapūpū wera (Tg), te pāmahana e whakawhitihia ai te pūmua mai i te sol ki te gel. He mea nui tēnei āhuatanga hei whakatau i te mahi a ngā etera cellulose i roto i ngā whakamahinga rerekē. I roto i tēnei tuhinga, ka matapakihia e mātou te pāmahana whakapūpū wera o te hydroxypropyl methylcellulose (HPMC), tētahi o ngā etera cellulose e whakamahia whānuitia ana i roto i te ahumahi.
Te pāmahana whakapūmau wera o te HPMC
He matū cellulose hanga-haurua te HPMC e whakamahia whānuitia ana i roto i ngā momo mahi nā ōna āhuatanga ahurei. He tino wairewa te HPMC i roto i te wai, ka hanga he otinga matotoru mārama i ngā kukū iti. I ngā kukū teitei ake, ka hanga e te HPMC he kirikiri ka taea te huri i te whakamahana me te whakamatao. Ko te kirikiri wera o te HPMC he tukanga e rua ngā taahiraa e uru ana ki te hanganga o ngā micelles, ā, muri iho ka whakakotahihia ngā micelles hei hanga i tētahi whatunga kirikiri (Pikitia 1).
Ko te pāmahana whakapūkara wera o te HPMC e whakawhirinaki ana ki ētahi āhuatanga pēnei i te nui o te whakakapinga (DS), te taumaha ngota, te kukū, me te pH o te otinga. I te nuinga o te wā, ko te teitei ake o te DS me te taumaha ngota o te HPMC, ko te teitei ake o te pāmahana whakapūkara wera. Ka pā hoki te kukū o te HPMC i roto i te otinga ki te Tg, ko te teitei ake o te kukū, ko te teitei ake o te Tg. Ka pā hoki te pH o te otinga ki te Tg, ā, ka iti ake te Tg i roto i ngā otinga waikawa.
Ka taea te whakapūmau i te wera o te HPMC, ā, ka pāngia e ngā āhuatanga o waho pērā i te kaha kutikuti, te pāmahana, me te kukū tote. Ka pakaru te hanganga o te tiēre i te kutikuti, ā, ka whakaheke i te Tg, i te mea ka rewa te tiēre i te pāmahana, ka whakaheke i te Tg. Ka pā anō hoki te tāpiri tote ki te wairewa ki te Tg, ā, ko te noho mai o ngā kationa pērā i te konupūmā me te konupora ka whakanui ake i te Tg.
Te tono o ngā momo Tg HPMC
Ka taea te whakarite i te whanonga whakamahana o te HPMC mō ngā tono rerekē. Ka whakamahia ngā HPMC iti-Tg i roto i ngā tono e hiahia ana kia tere te whakakī, pērā i ngā kai reka inamata, ngā ranu me ngā hupa. Ka whakamahia te HPMC me te Tg teitei i roto i ngā tono e hiahia ana kia roa te whakakī, kia roa rānei te whakakī, pērā i te hanganga o ngā pūnaha tuku rongoā, ngā papa tukunga pumau, me ngā takai patunga.
I roto i te umanga kai, ka whakamahia te HPMC hei whakamātotoru, hei whakaū, hei whakapūmau hoki i te wai. Ka whakamahia te HPMC iti-Tg i roto i ngā whakatakotoranga kai reka inamata e hiahia ana kia tere te whakapūmau kia puta ai te kakano me te reka o te waha e hiahiatia ana. Ka whakamahia te HPMC me te Tg teitei i roto i ngā whakatakotoranga horapa iti-ngako ina hiahiatia te whakapūmau whakaroa, whakaroa rānei hei ārai i te mahi tahi me te pupuri i te hanganga horapa.
I roto i te umanga rongoā, ka whakamahia te HPMC hei here, hei wawahi, hei tukunga pumau hoki. Ka whakamahia te HPMC me te Tg teitei i roto i te hanganga o ngā papa tukunga roa, ina hiahiatia te whakaroa, te whakaroa rānei i te whakakī hei tuku i te rongoā mō te wā roa. Ka whakamahia te HPMC Tg iti i roto i te hanganga o ngā papa wawahi ā-waha, ina hiahiatia te wawahi tere me te whakakī hei whakarato i te reka e hiahiatia ana me te ngāwari o te horomi.
hei whakamutunga
Ko te pāmahana whakapūkara wera o te HPMC tētahi āhuatanga matua e whakatau ana i tōna whanonga i roto i ngā tono maha. Ka taea e te HPMC te whakarite i tana Tg mā te taumata o te whakakapinga, te taumaha ngota, te kukū me te uara pH o te otinga kia rite ki ngā tono rerekē. Ka whakamahia te HPMC me te Tg iti mō ngā tono e hiahia ana kia tere te whakapūkara, ko te HPMC me te Tg teitei ia e whakamahia ana mō ngā tono e hiahia ana kia roa te whakapūkara. He cellulose ether maha ngā whakamahinga, he maha ngā whakamahinga pea i roto i ngā ahumahi maha.
Wā tuku: 24 o Ākuhata-2023