Te Hydroxypropyl methylcellulose (HPMC)He matū pūmua wairewa-wai te HPMC e whakamahia whānuitia ana, e whakamahia whānuitia ana i roto i ngā rongoā, kai, rauemi hanga, whakapaipai me ētahi atu mara. He pai ngā āhuatanga wairewa me te matotoru o te HPMC, ā, ka taea e ia te hanga i tētahi otinga colloidal pumau, nō reira he mea nui tana mahi i roto i ngā tono maha. Hei whakatutuki i te mahi katoa a te HPMC, he mea tino nui te tikanga whakarewa tika.
1. Tikanga whakarewa wai pāmahana noa
Ka taea te whakarewa i te HPMC ki te wai matao, engari me whai pūkenga hei karo i tōna haaputupututanga. Hei whakapai ake i te pānga whakarewatanga, ka taea te whakamahi i ēnei mahi:
Hipanga 1: Tāpirihia te HPMC ki te wai
I te pāmahana rūma, ruia te HPMC kia ōrite ki runga i te mata o te wai kia kore ai e ringihia he nui o te HPMC ki roto i te wai i te wā kotahi. Nā te mea he matū pūmua te HPMC, mā te tāpiri tika i te nui o te HPMC ka mimiti i te wai, ka pupuhi tere i roto i te wai hei hanga i tētahi matū rite ki te tiēre.
Hipanga 2: Te whakaoho
I muri i te tāpiri i te HPMC, me whakaoho tonu kia ōrite. Nā te mea he angiangi ngā matūriki o te HPMC, ka pupuhi i muri i te mimiti i te wai hei hanga i tētahi matū rite ki te tiēre. Mā te whakaoho ka ārai i te HPMC kei haaputuputu hei puranga.
Hipanga 3: Whakatūria, ka whakaohokia anō
Ki te kore e tino rewa te HPMC, ka taea te waiho te otinga kia tū mō tētahi wā, kātahi ka haere tonu te whakaoho. I te nuinga o te wā ka rewa katoa i roto i ētahi haora.
He pai tēnei tikanga mō ngā wā kāore e hiahiatia he whakamahana, engari he roa te wā e hiahiatia ana kia rewa katoa te HPMC.
2. Tikanga whakarewa wai wera
Ka tere ake te rewa o te HPMC i roto i te wai mahana, nō reira, mā te whakamahana i te pāmahana o te wai ka tere ake te tukanga rewa. Ko te pāmahana wai whakamahana e whakamahia whānuitia ana ko te 50-70℃, engari ki te nui rawa te pāmahana (pērā i te neke atu i te 80℃) ka heke pea te HPMC, nō reira me whakahaere te pāmahana.
Hipanga 1: Te whakamahana wai
Whakamahanahia te wai ki te 50°C, kia mau tonu.
Hipanga 2: Tāpirihia te HPMC
Tauhiuhia mārire te HPMC ki roto i te wai wera. Nā te pāmahana teitei o te wai, ka ngāwari ake te memeha o te HPMC, ka whakaiti i te haaputupututanga.
Hipanga 3: Te whakaoho
I muri i te tāpiri i te HPMC, me whakaoho tonu te wai. Mā te whakakotahitanga o te whakamahana me te whakaoho ka tere te memeha o te HPMC.
Hipanga 4: Kia mau tonu te pāmahana me te whakaoho tonu
Ka taea e koe te pupuri i tētahi pāmahana, me te whakaoho tonu kia memeha rawa te HPMC.
3. Tikanga Whakarewa Waipiro
Kāore e taea te whakarewa i te HPMC i roto i te wai anake, engari i roto hoki i ētahi whakarewa waipiro (pērā i te etanoru). Ko te painga matua o te tikanga whakarewa waipiro ko te whakapai ake i te wairewatanga me te mararatanga o te HPMC, inā koa mō ngā pūnaha he nui te wai.
Hipanga 1: Kōwhiria he whakarewa waipiro e tika ana
He maha ngā wā ka whakamahia ngā whakarewa waipiro pēnei i te etanoru me te isopropanol hei whakarewa i te HPMC. I te nuinga o te wā, he pai ake te pānga o te otinga etanoru 70-90% ki te whakarewa i te HPMC.
Hipanga 2: Te Whakakorenga
Tauhiuhia mārire te HPMC ki roto i te whakarewa waipiro, me te whakaoho me te tāpiri atu kia tino marara te HPMC.
Hipanga 3: Te tū me te whakaoho
He tere rawa te tukanga whakarewa i te HPMC i roto i te whakarewa waipiro, ā, he torutoru meneti pea te roa hei whakaoti i te whakarewatanga.
Ko te tikanga whakarewa waipiro e whakamahia ana i ngā horopaki tono e hiahia ana kia tere ake te whakarewatanga, ā, kia iti ake te ihirangi wai.
4. Tikanga whakarewa whakaranu-wai
I ētahi wā ka whakarewahia te HPMC ki roto i te ranunga o tētahi ōwehenga o te wai me te whakarewa. He tino pai tēnei tikanga mō ngā āhuatanga e hiahiatia ana kia whakarerekētia te matotoru o te otinga, te tere whakarewa rānei. Ko ngā whakarewa noa ko te acetone, te etanoru, me ētahi atu.
Hipanga 1: Whakaritea te otinga
Kōwhiria he ōwehenga e tika ana o te whakarewa me te wai (hei tauira, 50% wai, 50% whakarewa) ka whakamahana ki te pāmahana e tika ana.
Hipanga 2: Tāpirihia te HPMC
I a koe e whakaoho ana, tāpirihia mārire te HPMC kia ōrite te rewa.
Hipanga 3: Te whakatikatika anō
E ai ki te hiahia, ka taea te whakanui ake i te ōwehenga o te wai, te whakarewa rānei hei whakatika i te wairewatanga me te matotoru o te HPMC.
He pai tēnei tikanga mō ngā wā ka tāpirihia ngā whakarewa waro ki ngā otinga wai hei whakapai ake i te tere whakarewatanga, hei whakarerekē rānei i ngā āhuatanga o te otinga.
5. Tikanga whakarewanga āwhina-orohiko
Mā te whakamahi i te pānga o te oscillation auau-teitei o te ultrasound, ka taea e te tikanga whakarewatanga āwhina-ultrasonic te whakateretere i te tukanga whakarewatanga o te HPMC. He tino pai tēnei tikanga mō ngā nui o te HPMC e hiahia ana kia tere te whakarewa, ā, ka taea te whakaiti i te raruraru kohikohi ka puta pea i te wā e whakaohokia ana.
Hipanga 1: Whakaritea te otinga
Tāpirihia te HPMC ki te nui e tika ana o te wai, o te otinga whakaranu wai-whakarewa rānei.
Hipanga 2: Maimoatanga Ultrasonic
Whakamahia he kaihoroi ultrasonic, he wairewa ultrasonic rānei, ka rongoā kia rite ki te kaha me te wā kua whakaritea. Ka taea e te pānga wiri o te ultrasound te tere ake i te tukanga wairewa o te HPMC.
Hipanga 3: Tirohia te pānga whakarewatanga
I muri i te maimoatanga ultrasonic, tirohia mēnā kua rewa katoa te wai. Mēnā he wāhanga kāore anō kia rewa, ka taea te mahi anō i te maimoatanga ultrasonic.
He pai tēnei tikanga mō ngā tono e hiahia ana kia tere te whakarewa me te whai hua.
6. Te maimoatanga i mua i te whakarewatanga
Hei karo iHPMCAhakoa te uaua o te waimeha, te uaua rānei o te waimeha, ka taea te whakamahi i ētahi tikanga maimoatanga-mua, pērā i te whakaranu i te HPMC me te iti o ētahi atu whakarewa (pērā i te glycerol), te whakamaroke i te tuatahi, te whakamakuku rānei i te HPMC i mua i te tāpiri i te whakarewa. Ka taea e ēnei mahi maimoatanga-mua te whakapai ake i te waimeha o te HPMC.
He maha ngā huarahi hei whakarewa i te HPMC. Mā te whiriwhiri i tētahi tikanga whakarewatanga e tika ana ka taea te whakapai ake i te whai huatanga o te whakarewatanga me te kounga o te hua. He pai te tikanga whakarewatanga pāmahana rūma mō te taiao ngawari, mā te tikanga whakarewatanga wai wera ka taea te tere ake te tukanga whakarewatanga, ā, he pai te tikanga whakarewatanga waipiro me te tikanga whakarewatanga whakauru wai-whakarewa mō te whakarewatanga me ngā hiahia motuhake. He huarahi whai hua te tikanga whakarewatanga āwhina-ultrasonic ki te whakaoti i te whakarewatanga tere o te nui o te HPMC. E ai ki ngā whakaritenga tono motuhake, mā te whiriwhiri ngāwari o te tikanga whakarewatanga tika ka taea te whakarite i te mahi pai rawa atu o te HPMC i roto i ngā mara rerekē.
Wā tuku: Hakihea-19-2024