He momo pūhui pūhui nui te cellulose ether, e whakamahia whānuitia ana i roto i te hanga whare, rongoā, kai me ētahi atu mara. I roto i ēnei, ko te HPMC (hydroxypropyl methylcellulose), MC (methylcellulose), HEC (hydroxyethyl cellulose) me te CMC (carboxymethyl cellulose) ngā ether cellulose e whā e whakamahia whānuitia ana.
Mētara pūtau (MC):
Ka wairewa te MC i roto i te wai matao, ā, he uaua ki te wairewa i roto i te wai wera. He tino pumau te wairewa i roto i te awhe pH=3~12, he pai te hototahi, ā, ka taea te whakaranu ki ngā momo matū horoi pēnei i te māngaro me te kapia guar. Ina tae te pāmahana ki te pāmahana whakapūkara, ka puta te whakapūkara.
Ko te pupuri wai o te MC e whakawhirinaki ana ki te nui o te tāpiri, te matotoru, te pai o te matūriki me te tere whakarewa. I te nuinga o te wā, he teitei te tere pupuri wai ina nui te nui o te tāpiri, he pai ngā matūriki, ā, he teitei te matotoru. I roto i ēnei, ko te nui o te tāpiri te mea nui rawa atu te pānga ki te tere pupuri wai, ā, kāore te taumata matotoru e rite ana ki te tere pupuri wai. Ko te tere whakarewa e whakawhirinaki ana ki te nui o te whakarerekētanga o te mata me te pai o te matūriki o ngā matūriki cellulose.
Ka pā kino ngā panonitanga pāmahana ki te pupuri wai o te MC. I te nuinga o te wā, ka nui ake te pāmahana, ka kino ake te pupuri wai. Mena ka neke ake te pāmahana o te moata i te 40°C, ka tino heke te pupuri wai o te MC, ka pā kino ki te mahi hanga o te moata.
He pānga nui tō te MC ki te mahi hanga me te piri o te moata. I konei, ko te "piri" e pā ana ki te piri i waenga i ngā taputapu hanga a te kaimahi me te papa pakitara, arā, te ātete kutikuti o te moata. Ko te nui ake o te piri, ko te nui ake o te ātete kutikuti o te moata, ko te nui ake o te kaha e hiahiatia ana e te kaimahi i te wā e whakamahia ana, ā, ko te ngoikore o te mahi hanga o te moata. He taumata waenga te piri o te MC i waenga i ngā hua cellulose ether.
Te hauwaiporoporo metiporoporo (HPMC):
He ngāwari te wairewa o te HPMC ki te wai, engari he uaua pea ki te wairewa ki te wai wera. Heoi, he nui ake te pāmahana o tōna wairewatanga i roto i te wai wera i tō te MC, ā, he pai ake hoki tōna wairewatanga i roto i te wai matao i tō te MC.
E pā ana te matotoru o te HPMC ki te taumaha ngota, ā, he teitei te matotoru ina nui te taumaha ngota. Ka pā hoki te pāmahana ki tōna matotoru, ā, ka heke te matotoru i te pikinga o te pāmahana, engari ko te pāmahana e heke ai tōna matotoru he iti iho i te pāmahana o te MC. He pumau tōna otinga i te pāmahana rūma.
Ko te pupuri wai o te HPMC e whakawhirinaki ana ki te nui me te matotoru o te tāpiri. Ko te tere pupuri wai i te nui tāpiri kotahi he teitei ake i te MC.
He pumau te HPMC ki ngā waikawa me ngā kawakore, ā, he tino pumau tōna wairewa i te awhe pH o te 2~12. He iti noa te pānga o te houra tunutunu me te wai raima ki tōna mahi, engari ka taea e te kawakore te whakatere i tōna tere whakarewa me te whakanui ake i te matotoru. He pumau te HPMC ki ngā tote whānui, engari ina teitei te kukū o te wairewa tote, ka piki ake te matotoru o te wairewa HPMC.
Ka taea te whakaranu i te HPMC me ngā matū pūmua wairewa-wai hei hanga i tētahi otinga ōrite, matotoru ake, pērā i te waipiro polyvinyl, te māngaro ether, te kapia huawhenua, me ētahi atu.
He pai ake te ātete o te HPMC ki ngā whākōkī i te MC, ā, he iti ake te ngawari o tana otinga ki te pirau whākōkī i te MC. He pai ake te piri o te HPMC ki te moata i te MC.
Te pūhui hauwaioraitiri (HEC):
Ka wairewa te HEC i roto i te wai matao, ā, he uaua ki te wairewa i roto i te wai wera. He pumau te otinga i te pāmahana teitei, ā, kāore he āhuatanga tiēre. Ka taea te whakamahi i roto i te moata mō te wā roa i te pāmahana teitei, engari he iti ake tōna pupuri wai i te MC.
He pumau te HEC ki ngā waikawa whānui me ngā kawakore, ka taea e te kawakore te whakatere i tōna whakarewanga me te whakanui ake i te matotoru, ā, he iti iho tōna horapa i roto i te wai i te MC me te HPMC.
He pai te mahi whakatārewatanga a te HEC mō te moata, engari he roa ake te wā whakaroa o te sima.
He iti ake te mahi a te HEC e hangaia ana e ētahi umanga ā-rohe i te MC nā te mea he nui te wai me te pungarehu i roto.
Carboxymethyl cellulose (CMC):
Ko te CMC he etera cellulose ionic i hangaia mā te raupapa o ngā maimoatanga tauhohenga i muri i te maimoatanga o ngā muka taiao (pērā i te miro) ki te kawakore me te whakamahi i te waikawa chloroacetic hei kaihoko etherifying. Ko te nui o te whakakapinga kei waenganui i te 0.4 me te 1.4, ā, he nui te pānga o tōna mahi ki te nui o te whakakapinga.
He pānga whakamātotoru me te whakaū i te emulsification o te CMC, ā, ka taea te whakamahi i roto i ngā inu kei roto te hinu me te pūmua hei whakaū i te emulsification.
He pānga pupuri wai tō te CMC. I roto i ngā hua mīti, taro, parāoa koromamao me ētahi atu kai, ka taea e ia te whakapai ake i ngā kiko, ā, ka taea hoki te whakaiti i te pūngāwerewere o te wai, te whakanui ake i te hua o te hua, me te whakanui ake i te reka.
He pānga whakapūpū te CMC, ā, ka taea te whakamahi hei hanga tiēre me te tiamu.
Ka taea e te CMC te hanga i tētahi kiriata ki te mata o te kai, he pānga tiaki tēnei ki ngā hua me ngā huawhenua, ā, ka roa ake te ora o ngā hua me ngā huawhenua.
He āhuatanga motuhake me ngā wāhi tono motuhake tō ia etera cellulose. Me whakatau te kōwhiringa o ngā hua e tika ana kia rite ki ngā whakaritenga tono motuhake me ngā āhuatanga taiao.
Wā tuku: Oketopa-29-2024