Etera celluloseHe tino pai te pupuri wai, ka ārai i te mimiti wawe o te makuku i roto i te moata maku, i te mimiti rānei e te paparanga turanga, ā, ka whakarite kia tino makuku te sima, kia mau ai ngā āhuatanga hangarau o te moata, he mea tino whai hua ki te moata paparanga angiangi me ngā paparanga turanga mimiti wai, ki te moata rānei i hangaia i raro i ngā āhuatanga pāmahana teitei me te maroke. Ka taea e te pānga pupuri wai o te cellulose ether te whakarerekē i te tukanga hanga tuku iho me te whakapai ake i te ahunga whakamua o te hanga. Hei tauira, ka taea te mahi i te hanga parai i runga i ngā papa mimiti wai me te kore e whakamakuku i mua.
He nui te pānga o te matotoru, te horopeta, te pāmahana taiao me te hanganga ngota o te cellulose ether ki tōna mahi pupuri wai. I raro i ngā āhuatanga ōrite, ko te nui ake o te matotoru o te cellulose ether, ko te pai ake o te pupuri wai; ko te teitei ake o te horopeta, ko te pai ake o te pupuri wai. I te nuinga o te wā, ka taea e te iti o te cellulose ether te whakapai ake i te pupuri wai o te moata. Ina tae te horopeta ki tētahi taumata. Ina piki ake te taumata pupuri wai, ka puhoi te ia o te tere pupuri wai; ina piki ake te pāmahana taiao, ka heke te pupuri wai o te cellulose ether, engari ko ētahi cellulose ether kua whakarerekētia he pai ake te pupuri wai i raro i ngā āhuatanga pāmahana teitei; ko ngā muka he iti ake ngā nekehanga whakakapinga. He pai ake te mahi pupuri wai o te vegan ether.
Ka hono te rōpū hydroxyl i runga i te ngota cellulose ether me te ngota hāora i runga i te here ether ki te ngota wai hei hanga i te here hauwai, ka huri i te wai kore utu hei wai here, ā, ka whai wāhi nui ki te pupuri wai; mā te hononga o te ngota wai me te mekameka ngota cellulose ether ka taea e ngā ngota wai te tomo ki roto i te mekameka macromolecular cellulose ether, ā, ka pāngia e ngā kaha here kaha, ā, ka hangaia he wai here me te wai piri, ka whakapai ake i te pupuri wai o te paru sima; ka whakapai ake te cellulose ether i te paru sima hou. Ko ngā āhuatanga rheological, te hanganga whatunga pore me te pēhanga osmotic, ngā āhuatanga hanga kiriata rānei o te cellulose ether ka ārai i te horapa o te wai.
Ka whakanuia e te cellulose ether te matotoru o te moata mākū, ka taea te whakanui ake i te kaha piri i waenga i te moata mākū me 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 piri pereki me te pūnaha whakamahana pakitara o waho. Ka taea hoki e te pānga matotoru o te cellulose ether te whakanui ake i te kaha ārai-marara me te ōritetanga o ngā rauemi hou kua whakaranua, te ārai i te wehenga rauemi, te wehewehe me te toto, ā, ka taea te whakamahi i roto i te raima muka, te raima raro wai me te raima whakakī-whaiaro.
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 te 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 whakapiri i te maripi parai). Ko te moata whakataurite-ake me te raima whakakī-ake, e hiahia ana ki te rere nui, me iti te matotoru 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, ka whakanui ake hoki i te hua o te moata.
Ko te matotoru o te otinga cellulose ether e whakawhirinaki ana ki ngā āhuatanga e whai ake nei: te taumaha ngota o te cellulose ether, te kukū, te pāmahana, te tere kutikuti me te tikanga whakamātautau. I raro i ngā āhuatanga ōrite, ko te nui ake o te taumaha ngota o te cellulose ether, ko te teitei ake o te matotoru o te otinga; ko te teitei ake o te kukū, ko te teitei ake o te matotoru o te otinga. I te whakamahinga, me tupato kia kaua e nui rawa te horopeta, ā, kia pā ki te mahi o te moata me te raima; cellulose ether Ka heke te matotoru o te otinga ether me te pikinga o te pāmahana, ā, ko te teitei ake o te kukū, ko te nui ake o te awe o te pāmahana; ko te otinga cellulose ether he wai rūpahu me te āhuatanga o te angiangi kutikuti, ko te nui ake o te tere kutikuti i te wā whakamātautau, ko te iti ake o te matotoru, nō reira, ka heke te piri o te moata i raro i te mahi a te kaha o waho, he mea pai ki te hanganga waru o te moata, kia pai ai te mahi me te piri o te moata i te wā kotahi; nā te mea ehara te otinga cellulose ether i te Newtonian. Mō ngā wai, ina rerekē ngā tikanga whakamātautau, ngā taputapu me ngā taputapu, ngā taiao whakamātautau rānei e whakamahia ana hei whakamātautau i te matotoru, ka tino rerekē ngā hua whakamātautau o te otinga cellulose ether kotahi.
Ka taea e ngā ngota ngota cellulose ether te whakau i ētahi ngota wai o te rauemi hou i te taha o te mekameka ngota, ā, ka whakanui ake i te matotoru o te otinga. Ka whiria ngā mekameka ngota o te cellulose ether hei hanga i tētahi hanganga whatunga toru-ahu, ka pai ai te matotoru o tōna otinga wai.
He nui te thixotropy o te wairewa wai cellulose ether matotoru-teitei, he āhuatanga nui anō hoki tēnei o te cellulose ether. Ko ngā wairewa wai ote metiloselulosahe maha ngā wā he āhua rūpahu, he āhua kore-thixotropic te rere i raro iho i tōna pāmahana tiēre, engari e whakaatu ana i ngā āhuatanga rere Newtonian i ngā tere kutikuti iti. Ka piki ake te āhua rūpahu me te taumaha ngota, te kukū rānei o te cellulose ether, ahakoa te momo whakakapinga me te nui o te whakakapinga. Nō reira, ko ngā cellulose ether o te taumata matotoru kotahi, ahakoa mc, HPmc, HEmc, ka whakaatu tonu i ngā āhuatanga rheological ōrite i te mea ka mau tonu te kukū me te pāmahana. Ka hangaia ngā tiēre hanganga ina piki ake te pāmahana, ā, ka puta ngā rerenga tino thixotropic. Ko ngā cellulose ether kukū teitei me te matotoru iti e whakaatu ana i te thixotropy ahakoa i raro iho i te pāmahana tiēre. He tino painga tēnei āhuatanga ki te whakatikatika i te whakataurite me te whakaheke i roto i te hanganga o te moata hanga whare. Me whakamārama i konei ko te teitei ake o te matotoru o te cellulose ether, ko te pai ake o te pupuri wai, engari ko te teitei ake o te matotoru, ko te teitei ake o te taumaha ngota whanaunga o te cellulose ether, me te hekenga rite o tōna wairewa, he pānga kino ki te kukū moata me te mahi hanga. Ka nui ake te matotoru, ka kitea te pānga matotoru ki te moata, engari kāore i te tino ōrite. Ko ētahi matotoru reo, ko ētahi matotoru iti, engari he pai ake te mahi a te cellulose ether kua whakarerekētia ki te whakapai ake i te kaha hanganga o te moata mākū. Mā te pikinga ake o te matotoru, ka pai ake te pupuri wai o te cellulose ether.
Wā tuku: 28 Paenga-whāwhā 2024