Ko ngā etera cellulose he momo matū pūhui pūhui waro kua whakarerekētia mai i te cellulose tūturu. He mea whakamahi noa i roto i ngā rauemi hanga, inā koa i roto i ngā rauemi sima. Ko te awe o te etera cellulose ki te tukanga whakamakuku sima e whakaatuhia ana i roto i ngā āhuatanga e whai ake nei: te marara o ngā matūriki sima, te pupuri wai, te pānga matotoru, me te awe ki te āhua me te whanaketanga kaha o ngā hua whakamakuku sima.
1. Whakataki ki te whakamakuku sima
Ko te tukanga whakamakuku o te sima he raupapa o ngā tauhohenga ā-tinana me te matū matatini i waenga i te sima me te wai. Mā ēnei tauhohenga ka whakapakeke haere te whakapiri sima kia hanga he hanganga totoka, ā, ka puta he hua whakamakuku pērā i te konupūmā silicate hydrate (CSH) me te konupūmā hydroxide (CH). I roto i tēnei tukanga, ko te tere tauhohenga whakamakuku o te sima, te rere me te pupuri wai o te paru, me te hanganga o ngā hua whakamakuku ka pā tika ki te kaha me te roa o te raima whakamutunga.
2. Te tikanga mahi a ngā etera cellulose
He mahi nui tā te cellulose ether hei whakahaere i te tukanga whakamakuku sima. E rua ngā huarahi e pā ai te cellulose ether ki te tukanga whakamakuku o te sima: ko te tuatahi mā te pā ki te tohatoha me te mimiti o te wai i roto i te paru sima; ko tetahi mā te pā ki te marara me te whakapūmau o ngā matūriki sima.
Te whakahaere makuku me te pupuri wai
Ka taea e ngā cellulose ethers te whakapai ake i te pupuri wai o ngā rauemi sima. Nā tōna kaha ki te wai, ka taea e te cellulose ether te hanga i tētahi otinga colloidal pumau i roto i te wai, ka taea te mimiti me te pupuri i te makuku. He mea nui tēnei kaha pupuri wai hei whakaiti i ngā kapiti i puta mai i te ngaronga tere o te wai i roto i te raima i te wā o te whakamakuku wawe. Ina koa i roto i ngā taiao maroke, i ngā āhuatanga hanga pāmahana teitei rānei, ka taea e te cellulose ether te ārai i te wai kia tere rawa te mimiti, me te whakarite kia nui te wai i roto i te paru sima hei tautoko i te tauhohenga whakamakuku noa.
Te Rheology me te Whakamātotoru
Ka taea hoki e ngā cellulose ethers te whakapai ake i te rheology o ngā paru sima. Whai muri i te tāpiri i te cellulose ether, ka tino piki ake te matotoru o te paru sima. Ko te nuinga o tēnei āhuatanga e pā ana ki te hanganga mekameka roa i hangaia e ngā ngota cellulose ether i roto i te wai. Ka taea e tēnei ngota mekameka roa te aukati i te nekehanga o ngā matūriki sima, ā, ka piki ake te matotoru me te matotoru o te paru. He mea tino nui tēnei āhuatanga i roto i ngā tono pēnei i te parai me ngā piri taera, nā te mea ka ārai i te tere o te rere o te moata sima, me te whakarato i te mahi hanga pai ake.
Whakaroahia te whakamakuku me te whakarerekē i te wā whakatakoto
Ka taea e te cellulose ether te whakaroa i te tauhohenga whakamakuku o te sima, me te whakanui ake i te wā whakatakoto tuatahi me te wā whakatakoto whakamutunga o te paru sima. Ka puta tēnei pānga nā te mea ka piri ngā ngota o te cellulose ether ki te mata o ngā matūriki sima, ka hanga he ārai e ārai ana i te pa atu o te wai me ngā matūriki sima, ā, ka whakaroa i te tauhohenga whakamakuku. Mā te whakaroa i te wā whakatakoto, ka taea e ngā cellulose ether te whakapai ake i te mahi hanga, ka hoatu he wā nui ake ki ngā kaimahi hanga ki te mahi whakatikatika me te whakatika.
3. Te pānga ki te āhua o ngā hua whakamakuku sima
Ka pāngia hoki te hanganga moroiti o ngā hua whakamakuku sima e te noho mai o ngā etera cellulose. Kua whakaatuhia e ngā rangahau ka rerekē te āhua o te tiēre konupūmā silicate hydrate (CSH) i muri i te tāpiri i te etera cellulose. Ka pā pea ngā ngota etera cellulose ki te hanganga tioata o te CSH, ka nui ake te wetewete. Ka whakaitihia pea e tēnei hanganga wetewete te kaha o mua ki tētahi taumata, engari ka āwhina anō hoki ki te whakapai ake i te pakari o te rauemi.
Ka taea hoki e ngā cellulose ethers te whakaiti i te hanganga o te ettringite i te wā o te tukanga whakamakuku. Nā te mea ka whakaroa te cellulose ether i te tere o te tauhohenga whakamakuku, ka whakaitihia te tere hanganga o te ettringite i roto i te sima, ā, ka whakaitihia te ahotea o roto i puta mai i te whakawhānui o te rōrahi i te wā o te tukanga whakamaroke.
4. Pānga ki te whanaketanga kaha
He pānga nui anō hoki tō ngā cellulose ether ki te whanaketanga o te kaha o ngā rauemi sima. Nā te mea ka whakaroahia e ngā cellulose ether te tere o te makuku o te sima, ka puhoi ake te whanaketanga o te kaha wawe o ngā whakapiri sima. Heoi, i te haere tonu o te tauhohenga makuku, ka puta haere te pānga whakahaere o te pupuri wai o te cellulose ether me te āhua o te hua makuku, ka āwhina i te whakapai ake i te kaha i te wāhanga o muri mai.
Me mārama ko te nui me te momo o te cellulose ether e tāpirihia ana he pānga rua ki te kaha. Ka taea e te nui o te cellulose ether te whakapai ake i te mahi hanga me te whakanui ake i te kaha o muri mai, engari ko te whakamahinga nui rawa ka arahi ki te hekenga o te kaha tōmua o ngā rauemi sima me te pā ki ngā āhuatanga miihini whakamutunga. Nō reira, i roto i ngā tono mahi, me arotau te momo me te horopeta o te cellulose ether me te hoahoa kia rite ki ngā whakaritenga hangarau motuhake.
Ka pā te cellulose ether ki te tukanga whakamakuku me ngā āhuatanga o te rauemi sima mā te whakapai ake i te pupuri wai o ngā rauemi sima, te whakarerekē i te tere whakamakuku, me te pā ki te āhua o ngā hua whakamakuku. Ahakoa ka ngaro pea te kaha o mua i ngā cellulose ether, ka taea e rātou te whakapai ake i te roa me te pakari o te raima i te wā roa. Mā te tāpiri i te cellulose ether ka taea hoki te whakapai ake i te mahi hanga, inā koa i roto i ngā horopaki tono e hiahia ana ki te wā mahi roa me te nui o te pupuri wai. He painga kore e taea te whakakapi. I roto i ngā tono hangarau tūturu, mā te whiriwhiri tika i te momo me te horopeta o te cellulose ether ka taea te whakataurite i te kaha, te mahi hanga me ngā whakaritenga roa o te rauemi.
Wā tuku: Hepetema-27-2024