Ko ngā rōpū hydroxyl i runga ite etera celluloseKa hangaia e ngā ngota ngota me ngā ngota hāora i runga i ngā hononga etera he hononga hauwai ki ngā ngota wai, ka huri i te wai kore utu hei wai here, ā, ka whai wāhi nui ki te pupuri wai; mā te horapa tahi i waenga i ngā ngota wai me ngā mekameka ngota cellulose etera ka taea e ngā ngota wai te tomo ki roto i te mekameka macromolecular cellulose etera, ā, ka pāngia e ngā here kaha, ka hangaia he wai kore utu me te wai honohono, ka whakapai ake i te pupuri wai o te paru sima; ka whakapai ake te cellulose etera i ngā āhuatanga rheological, te hanganga whatunga pore me te pēhanga osmotic o te paru sima hou, i ngā āhuatanga hanga kiriata rānei o te cellulose etera ka ārai i te horapa o te wai.
Ko te pupuri wai o te cellulose ether tonu i ahu mai i te wairewatanga me te maroketanga o te cellulose ether tonu. Kāore te kaha whakamakuku o ngā rōpū hydroxyl anake e ranea hei utu mō ngā here hauwai kaha me ngā kaha van der Waals i waenga i ngā ngota, nō reira ka pupuhi noa engari kāore e memeha ki te wai. Ina whakaurua ngā whakakapinga ki roto i te mekameka ngota, ehara i te mea ka whakangaromia e ngā whakakapinga ngā mekameka hauwai anake, engari ka whakangaromia hoki ngā here hauwai i waenga i ngā mekameka nā te hononga o ngā whakakapinga i waenga i ngā mekameka tata. Ko te nui ake o ngā whakakapinga, ko te tawhiti i waenga i ngā ngota, ā, ko te nui ake o te pānga o te whakangaro i ngā here hauwai. I muri i te pupuhitanga o te whatunga cellulose, ka tomo te otinga, ā, ka wairewa te cellulose ether ki te wai, ka hanga he otinga matotoru teitei, ka whai wāhi ki te pupuri wai.
Ngā āhuatanga e pā ana ki te mahi pupuri wai:
Te Matatini: Ko te nui ake o te matatini o te cellulose ether, ko te pai ake o te mahi pupuri wai, engari ko te teitei ake o te matatini, ko te teitei ake o te taumaha ngota whanaunga o te cellulose ether, ā, ka heke iho tōna wairewa, ka pā kino ki te kukū me te mahi hanga o te moata. I te nuinga o te wā, mō te hua kotahi, he tino rerekē ngā hua matatini i inehia mā ngā tikanga rerekē, nō reira, ina whakatauritea te matatini, me whakahaere i waenga i ngā tikanga whakamātautau kotahi (tae atu ki te pāmahana, te rotor, me ētahi atu).
Te nui o te tāpiri: Ko te nui o te cellulose ether e tāpirihia ana ki te moata, ko te pai ake o te mahi pupuri wai. I te nuinga o te wā, ka taea e te iti o te cellulose ether te whakapai ake i te tere pupuri wai o te moata. Ina tae te nui ki tētahi taumata, ka puhoi te ia o te pikinga o te tere pupuri wai.
Te pai o te matūriki: Ko te pai ake o te pai o ngā matūriki, ko te pai ake o te pupuri wai. Ina pa atu ngā matūriki nui o te cellulose ether ki te wai, ka rewa tonu te mata, ka hanga he kirikiri hei takai i te rauemi kia kore ai e uru tonu ngā ngota wai. I ētahi wā, ahakoa te whakaoho roa, kāore e taea te whakatutuki i te horapa me te rewa ōrite, ka hanga he wairewa pupuhi, he whakakotahitanga rānei, e tino pā ana ki te pupuri wai o te cellulose ether. Ko te wairewatanga tētahi o ngā āhuatanga mō te whiriwhiri i te cellulose ether. Ko te pai hoki he tohu mahi nui o te methyl cellulose ether. Ka pā te pai ki te wairewatanga o te methyl cellulose ether. Ko te MC matotoru he kirikiri te nuinga o te wā, ā, ka taea te rewa ngāwari ki te wai me te kore e whakakotahi, engari he tino puhoi te tere rewatanga, ā, kāore e pai mō te whakamahi i roto i te moata maroke.
Te Pāmahana: I te pikinga ake o te pāmahana o te taiao, ka heke te pupuri wai o ngā cellulose ethers, engari he pai te pupuri wai o ētahi cellulose ethers kua whakarerekētia i raro i ngā āhuatanga pāmahana teitei; ina piki te pāmahana, ka ngoikore te makuku o ngā polymers, ā, ka peia te wai i waenga i ngā mekameka. Ina rawaka te maroke, ka tīmata ngā ngota ki te whakakotahi hei hanga i tētahi hanganga whatunga toru-ahu.
Hanganga ngota: He pai ake te pupuri wai o ngā etera cellulose he iti ake te whakakapinga.
Te whakamātotoru me te thixotropy
Te whakamātotoru:
Pānga ki te kaha piri me te mahi ārai-totoka: Ka hoatu e ngā etera cellulose he matotoru pai ki te moata maku, ka taea te whakanui ake i te kaha piri o te moata maku ki te paparanga turanga, me te whakapai ake i te mahi ārai-totoka o te moata. He whānuitia te whakamahinga i roto i te moata parai, te moata here taera me te pūnaha whakamahana pakitara o waho 3.
Pānga ki te ōritetanga o ngā rauemi: Ka taea hoki e te pānga matotoru o ngā etera cellulose te whakanui ake i te kaha ārai-marara me te ōritetanga o ngā rauemi hou kua whakaranua, te ārai i te wehewehenga rauemi, te wehewehe me te turuturu wai, ā, ka taea te whakamahi i roto i te raima muka, te raima raro wai me te raima whakakī-whaiaro.
Pūtake me te awe o te pānga matotoru: Ko te pānga matotoru o te cellulose ether ki ngā rauemi sima i ahu mai i te matotoru o te otinga cellulose ether. I raro i ngā āhuatanga ōrite, ko te teitei ake o te matotoru o te cellulose ether, ko te pai ake o te matotoru o ngā rauemi sima kua whakarerekētia, engari ki te nui rawa te matotoru, ka pā ki te rere me te mahi o te rauemi (pērā i te piri ki te maripi parai). Ko te moata whakataurite-ake me te raima whakakī-ake me ngā whakaritenga rere teitei e hiahia ana ki te matotoru iti o te cellulose ether. Hei tāpiri, ko te pānga matotoru o te cellulose ether ka whakanui ake i te hiahia wai o ngā rauemi sima me te whakanui ake i te putanga o te moata.
Te Tixotropy:
He nui te thixotropy o te wairewa wai cellulose ether matotoru-teitei, he āhuatanga nui anō hoki tēnei o te cellulose ether. Ko te wairewa wai o te methyl cellulose he pseudoplasticity me te non-thixotropic fluidity i raro iho i tōna pāmahana gel, engari he iti ngā tere kutikuti e whakaatu ana i ngā āhuatanga rere Newtonian. Ka piki ake te pseudoplasticity me te pikinga o te taumaha ngota cellulose ether, te kukū rānei, ā, kāore he pānga ki te momo whakakapinga me te taumata o te whakakapinga. Nō reira, ko ngā cellulose ether o te taumata matotoru ōrite, ahakoa MC, HPMC, HEMC rānei, e whakaatu tonu ana i ngā āhuatanga rheological ōrite tonu i te mea kei te mau tonu te kukū me te pāmahana. Ina piki te pāmahana, ka hangaia he gel hanganga, ā, ka puta he rere thixotropic teitei. Ko ngā cellulose ether he kukū teitei me te matotoru iti e whakaatu ana i te thixotropy ahakoa i raro iho i te pāmahana gel. He tino whai hua tēnei āhuatanga mō te whakatikatika i te whakataurite me te whakaheke o te moata whare i te wā hanga.
Te whakaurunga hau
Mātāpono me te pānga ki te mahi: He pānga nui te cellulose ether ki te whakauru hau ki ngā rauemi sima hou. He rōpū hydrophilic (ngā rōpū hydroxyl, ngā rōpū ether) me ngā rōpū hydrophobic (ngā rōpū methyl, ngā mowhiti glucose) kei roto i te cellulose ether. He matū horoi mata, ā, he pānga whakauru hau. Ka puta he pānga pōro i te pānga whakauru hau, ka taea te whakapai ake i te mahi a ngā rauemi hou kua whakaranua, pērā i te whakanui ake i te kirihou me te maeneene o te moata i te wā e mahi ana, he mea pai ki te horapa o te moata; ka whakanui ake hoki i te putanga o te moata, ka whakaiti i te utu whakaputa o te moata.
Pānga ki ngā āhuatanga ā-pūkaha: Ka whakanuia e te pānga herenga hau te porosity o te rauemi kua whakapakeketia, ā, ka whakaitihia ōna āhuatanga ā-pūkaha pēnei i te kaha me te modulus elasticity.
Pānga ki te rere: Hei matū horoi, he pānga whakamakuku, he pānga whakahinuhinu rānei tō te cellulose ether ki ngā matūriki sima, ā, me tōna pānga kukume hau ka whakanui ake i te rere o ngā rauemi sima, engari ka whakaitihia te rere e tōna pānga whakamātotoru. Ko te pānga o te cellulose ether ki te rere o ngā rauemi sima he huinga o ngā pānga whakakirihou me te whakamātotoru. I te nuinga o te wā, ina iti rawa te horopeta o te cellulose ether, ka puta ko ngā pānga whakakirihou, whakaiti wai rānei; ina teitei te horopeta, ka tere te piki o te pānga whakamātotoru o te cellulose ether, ā, ko tōna pānga kukume hau ka tino mākū, nō reira ka puta ko te whakamātotoru, ko te pikinga rānei o te hiahia wai.
Te wā tuku: Hakihea-23-2024