Te Hydroxypropyl methylcellulose (HPMC) He pūmua wairewa-wai tēnei e whakamahia whānuitia ana, e whakamahia whānuitia ana i roto i ngā rongoā, ngā mea whakapaipai, ngā kai me ngā ahumahi, inā koa i roto i te whakarite i ngā kirikiri. He pānga nui ōna āhuatanga ā-tinana me tōna whanonga whakarewa ki te whai huatanga i roto i ngā tono rerekē. Ko te pāmahana kirikiri o te kirikiri HPMC tētahi o ōna āhuatanga ā-tinana matua, e pā tika ana ki tana mahi i roto i ngā whakaritenga rerekē, pērā i te tukunga whakahaere, te hanganga kiriata, te pumau, me ētahi atu.
1. Hanganga me ngā āhuatanga o te HPMC
He pūmua wairewa-wai te HPMC i whiwhihia mā te whakauru i ngā whakakapinga e rua, te hydroxypropyl me te methyl, ki roto i te angaanga ngota cellulose. Kei roto i tōna hanganga ngota e rua ngā momo whakakapinga: te hydroxypropyl (-CH2CHOHCH3) me te methyl (-CH3). Ko ngā āhuatanga pēnei i te rerekētanga o te ihirangi hydroxypropyl, te taumata o te methylation, me te taumata o te polymerization ka pā nui ki te wairewa, te whanonga whakapūmau, me ngā āhuatanga miihini o te HPMC.
I roto i ngā otinga wai, ka hangaia e AnxinCel®HPMC ngā otinga colloidal pumau mā te hanga hononga hauwai ki ngā ngota wai me te taunekeneke ki tōna angaanga cellulose. Ina huri te taiao o waho (pēnei i te pāmahana, te kaha ionic, me ētahi atu), ka huri te taunekeneke i waenga i ngā ngota HPMC, ka hua ake he gelation.
2. Te whakamāramatanga me ngā āhuatanga awe o te pāmahana whakapūkara
Ko te pāmahana whakapūkara (Te pāmahana whakapūkara, T_gel) e pā ana ki te pāmahana e tīmata ai te whakawhiti o te otinga HPMC mai i te wai ki te totoka ina piki te pāmahana o te otinga ki tētahi taumata. I tēnei pāmahana, ka whakawhāitihia te nekehanga o ngā mekameka ngota HPMC, ka hanga he hanganga whatunga toru-ahu, ka hua ake he matū rite ki te tiēre.
He maha ngā āhuatanga e pāngia ana e te pāmahana whakapūkara o te HPMC, ko tētahi o ngā mea tino nui ko te nui o te hydroxypropyl. Haunga te nui o te hydroxypropyl, ko ētahi atu āhuatanga e pā ana ki te pāmahana o te gel ko te taumaha ngota, te kukū o te otinga, te uara pH, te momo whakarewa, te kaha ionic, me ētahi atu.
3. Te pānga o te ihirangi hydroxypropyl ki te pāmahana o te HPMC gel
3.1 Ko te pikinga o te ihirangi hydroxypropyl ka hua ake te pikinga o te pāmahana gel
He hononga tata te pāmahana whakapūkara o te HPMC ki te nui o te whakakapinga hydroxypropyl i roto i tōna ngota. I te pikinga ake o te ihirangi hydroxypropyl, ka piki ake te maha o ngā whakakapinga hydrophilic i runga i te mekameka ngota HPMC, ka hua ake he taunekeneke nui ake i waenga i te ngota me te wai. Mā tēnei taunekeneke ka totoro ake ngā mekameka ngota, ka whakaitihia te kaha o te taunekeneke i waenga i ngā mekameka ngota. I roto i tētahi awhe kukū, mā te whakanui ake i te ihirangi hydroxypropyl ka āwhina i te whakanui ake i te nui o te makuku me te whakatairanga i te whakaritenga tahi o ngā mekameka ngota, kia taea ai te hanga i tētahi hanganga whatunga i te pāmahana teitei ake. Nō reira, ko te pāmahana whakapūkara ka piki ake i te pikinga o te hydroxypropyl me te pikinga ake o te ihirangi.
Ko te HPMC he nui ake te ihirangi hydroxypropyl (pērā i te HPMC K15M) ka whakaatu i te pāmahana gelation teitei ake i te kukū kotahi i te AnxinCel®HPMC he iti ake te ihirangi hydroxypropyl (pērā i te HPMC K4M). Nā te mea he nui ake te ihirangi hydroxypropyl ka uaua ake te taunekeneke me te hanga whatunga i ngā pāmahana iti ake, me te hiahia i ngā pāmahana teitei ake hei wikitoria i tēnei whakamakuku me te whakatairanga i ngā taunekeneke i waenga i ngā ngota hei hanga i tētahi hanganga whatunga toru-ahu.
3.2 Te whanaungatanga i waenga i te nui o te hydroxypropyl me te kukū o te otinga
He mea nui anō hoki te kukū o te otinga e pā ana ki te pāmahana whakapūkara o te HPMC. I roto i ngā otinga HPMC kukū-teitei, he kaha ake ngā taunekeneke i waenga i ngā ngota ngota, nō reira ka teitei ake pea te pāmahana whakapūkara ahakoa he iti iho te ihirangi hydroxypropyl. I ngā kukū iti, he ngoikore te taunekeneke i waenga i ngā ngota HPMC, ā, he nui ake te tūponotanga o te whakapūkara o te otinga i ngā pāmahana iti iho.
Ahakoa te pikinga o te ihirangi hydroxypropyl, me piki tonu te pāmahana teitei ake hei hanga i te kirikiri. Ina koa i raro i ngā āhuatanga kukū iti, ka nui ake te pikinga o te pāmahana whakakikorua. Nā te mea he uaua ake te whakaoho i ngā taunekeneke i waenga i ngā mekameka ngota irahiko mā roto i ngā huringa pāmahana ki te HPMC he nui te ihirangi hydroxypropyl, ā, me nui ake te kaha wera o te tukanga whakakikorua hei wikitoria i te pānga whakamakuku.
3.3 Te pānga o te nui o te hydroxypropyl ki te tukanga whakapūkara
I roto i tētahi whānuitanga o te ihirangi hydroxypropyl, ko te tukanga whakapūmau te mea nui rawa atu i te taunekeneke i waenga i te whakapūmau me ngā mekameka ngota. Ina iti te ihirangi hydroxypropyl i roto i te ngota HPMC, ka ngoikore te whakapūmau, ka kaha te taunekeneke i waenga i ngā ngota, ā, ka taea e te pāmahana iti te whakatairanga i te hanganga o te ira. Ina teitei ake te ihirangi hydroxypropyl, ka tino kaha ake te whakapūmau, ka ngoikore te taunekeneke i waenga i ngā mekameka ngota, ā, ka piki ake te pāmahana whakapūmau.
Tērā pea ka piki ake te matotoru o te otinga HPMC i te nui ake o te hydroxypropyl, he huringa e whakanui ake ai i te pāmahana tīmatanga o te whakawairakau.
He pānga nui te nui o te hydroxypropyl ki te pāmahana o te whakarewatanga oHPMC. I te pikinga ake o te ihirangi hydroxypropyl, ka piki ake te hydrophilicity o te HPMC, ā, ka ngoikore te taunekeneke i waenga i ngā mekameka ngota, nō reira ka piki ake te pāmahana gelation. Ka taea te whakamārama i tēnei āhuatanga mā te tikanga taunekeneke i waenga i te hydration me ngā mekameka ngota. Mā te whakarerekē i te ihirangi hydroxypropyl o te HPMC, ka taea te whakatutuki i te whakahaere tika o te pāmahana gelation, ā, mā reira ka pai ake te mahi a te HPMC i roto i ngā tono rongoā, kai me ētahi atu ahumahi.
Wā tuku: Hanuere-04-2025