Te Tukanga Hanga Kirihou Nairona me ōna Whakamahinga i roto i te Ahumahi Kakahu
Pendahuluan
Ko te kirihou nairona he momo pūmua hangai kua huri i ngā momo ahumahi, tae atu ki ngā kakahu. I kitea i te tau 1935 e Wallace Carothers i DuPont, kua noho te nairona hei rauemi whiriwhiri i roto i te hanga o ngā hua maha nā ōna āhuatanga tino pai, pērā i te pakari, te kaha, me te ngāwari. Ka whakamāramahia e tēnei tuhinga te tukanga hanga o te kirihou nairona, me te tirotiro i ōna whakamahinga maha i roto i te umanga kakahu.
Hītori me te Kitenga o te Nailon
Ko te nairona tētahi o ngā pūmua hanga tuatahi i whakawhanakehia, i hangaia hoki hei hokohoko. He hononga tata tōna kitenga ki te rangahau a DuPont i te tīmatanga o te rautau 20, i te whāinga kia kitea he rauemi hanga hou hei whakakapi i te hiraka. Whai muri i ētahi tau rangahau, i angitu a Wallace Carothers me tana tīma ki te hanga i te polyamide tuatahi ka taea te hanga papatipu, ko te nairona 66.
Tukanga Hanga Nairona
He tukanga matū uaua te hanga nairona, mai i ngā monomer ki ngā polymer. Anei tētahi whakamārama taipitopito:
1. Kōwhiringa Rauemi Mata: Ko ngā rauemi matua mō te hanga nairona ko ngā monomer kei roto ko te hexamethylenediamine me te waikawa adipic. Kei roto i ēnei rauemi e rua ngā rōpū amine mahi (-NH2) me te waikawa carboxylic (-COOH), he mea nui ēnei mō te tukanga polymerization.
2. Te Whakapūhuitanga o te Kotinga: Ko te tukanga tuatahi i roto i te hanga nairona ko te whakapūhuitanga o te kotinga. I roto i tēnei tukanga, ka whakaranua te hexamethylenediamine me te waikawa adipic, ka whakamahanahia kia tauhohe rā anō hei hanga i te nairona 66 me te wai hei hua taha. Ka taea te whakaahua i te tauhohenga penei:
\[
(NH_2)(CH_2)_6(NH_2) + (COOH)(CH_2)_4(COOH) \perematau [-NH-(CH_2)_6-NH-CO-(CH_2)_4-CO-]_n + nH_2O
\]
3. Te Hurihuri me te Whakamahana: Kia oti te hanga o te pūmua, ko te mahi e whai ake nei ko te hurihuri. Ka tukuna te pūmua rewa mā roto i te mīhini hurihuri—he taputapu rite ki te tātari me ngā kōhao ririki—hei hanga i ngā miro angiangi. Kātahi ka whakamataohia ngā miro kua hangaia, ka totorohia kia kaha ake ai, kia roa ai hoki.
4. Te Whakapiko me te Tawhito: Kātahi ka hurihia ngā muka nairona hei miro. Kātahi ka tukuna tēnei miro mā te tukanga whakama hei tango i ngā toenga matū, hei whakangawari hoki i te muka.
5. Te Tuhi me te Whakakiko: Ko tēnei tukanga he kukume i te miro i te tere tere hei whakanui ake i tōna roa me tōna kaha. Kātahi ka taea te mahi whakakiko, mā te whakamahi i ngā tikanga miihini me te wera hei hoatu i ngā āhuatanga motuhake ki te muka, pērā i te ngāwari me te ngāwari.
Ngā Whakamahinga o te Nailoni i roto i te Ahumahi Kakahu
Kua noho te nairona hei rauemi matua mō te hanga i ngā momo hua kakahu nā ōna āhuatanga pai. Anei ētahi o ōna whakamahinga i roto i te umanga kakahu:
1. Kakahu me ngā Kākahu: He whānuitia te whakamahinga o te nairona ki te hanga kākahu nā te mea he mama, he pakari, he ngāwari hoki. He maha ngā wā ka whakamahia te papanga nairona ki te hanga i ngā kākahu o roto, ngā tōkena, ngā kākahu hākinakina, me ngā koti ārai hau.
2. Ngā Kakahu o Ia Rā: He maha ngā wā ka whakamahia te nairona hei hanga i ngā kakahu o ia rā pērā i ngā maru, ngā putea, me ngā taputapu motuka. He mea whiriwhiri tēnei rauemi nā tōna ātete ki te pakū me tōna pakari i roto i ngā āhuatanga huarere rerekē.
3. Ngā Ahumahi Motuhake: I roto i ētahi ahumahi, pērā i te ope taua, ka whakamahia te nairona hei hanga parakaiti, taputapu puni, me te taura. Nā ngā painga o te nairona ki te kaha kume me te ātete matū, he mea tino pai mō ēnei mahi.
4. Ngā Taonga me ngā Whakapaipai Kāinga: Ka whakamahia hoki te nairona ki ngā whāriki me ngā whakapaipai taonga. E mōhiotia ana ngā whāriki i hangaia mai i ngā muka nairona mō tō rātou pakari, te ngāwari ki te horoi, me te ātete pai ki ngā paru.
5. Te Whakakapinga i ngā Muka Taiao: Kua angitu te whakakapinga o te nairona i ngā muka taiao maha, pērā i te hiraka me te huruhuru hipi, i roto i ngā mahi kakahu maha. Nā ōna painga nui i hangaia i te papatipu me te nui ake o te ōhanga ki te whakatauritea ki ngā muka taiao, ka waiho te nairona hei whiringa matua i roto i ngā momo ahumahi.
Ngā Painga me ngā Huakore o te Nairon
Ko ngā painga matua o te muka nairona ko tōna kaha kume me tōna kaha ki te totoro ki tētahi taumata i mua i te hokinga ki tōna āhua taketake (te ngāwari). He ātete hoki te nairona ki te korohū, te harore, me te nuinga o ngā matū, ā, ka roa te mau o te muka nairona i roto i ngā mahi maha.
Heoi anō, he ngoikoretanga anō ō te nairona. Ko tētahi ko tōna kaha mimiti makuku iti iho i ngā muka tūturu pērā i te miro, ka pā kino ki te whakamarie i ngā āhuarangi wera. Hei tāpiri, ka taea e te nairona te rewa i ngā pāmahana tiketike, ā, me tino tupato i te horoinga kia kore ai e pakaru.
Auahatanga me te Anamata o te Nairona i roto i te Ahumahi Kakahu
Kei te whanake tonu te umanga kakahu, ā, kei te haere tonu te auahatanga i roto i te hanga me te whakamahi i ngā muka nairona. Kei te mahi ngā kairangahau inaianei ki te waihanga i ngā nairona e pai ake ana ki te taiao mā te whakamahi i ngā rauemi mata ka taea te whakahou me ngā tukanga whakaputa whai hua ake. Kei te haere tonu hoki ngā mahi ki te whakawhanake i ngā momo nairona me ngā āhuatanga motuhake, pērā i te ārai huakita, te ātete UV rānei, mā roto i ngā whakarerekētanga matū me te hangarau.
Hei tāpiri atu ki tēnā, kua noho ko te hangarua me te whakahou i te nairona hei kaupapa matua hei whakaiti i te pānga ki te taiao. Ko ngā kaupapa hangarua i te nairona mai i ngā taonga kua whakamahia, i ngā para whakaputa rānei, kua noho hei kaupapa matua i te mea kua piki haere te mōhiotanga ki te taiao.
Whakamutunga
Kua whai wāhi nui te kirihou nairona ki te whanaketanga o te umanga kakahu mai i tōna kitenga i ngā tau waru tekau ki muri. Nā te tukanga hanga e uru ana ki te whakakotahitanga me te miro hei muka, kua riro te nairona hei rauemi tino whai hua mō te hanga i ngā momo hua kakahu. Nā ōna painga e pā ana ki te kaha, te roa, me te ngāwari ka waiho te nairona hei otinga maha-whakamahinga i roto i te ao kakahu. Mā te rangahau tonu me te auahatanga, ka mārama haere te heke mai o te nairona, me te tumanako ka whakamahia whānuitia ngā hua nairona pumau me te pai ki te taiao a muri ake nei.
