He mā, he kanapa, he māmā, he parakore, he tohu mō te parakore.
He tokomaha te hunga e pai ana ki ngā taonga mā, ā, he maha ngā wā ka hangaia ngā taonga hokohoko ki te mā. I te nuinga o te wā, ka tupato te hunga e hoko ana i ngā taonga mā, e mau ana rānei i ngā kākahu mā, kia kaua e paru te mā. Engari he kupu waiata tēnei e mea ana, "I tēnei ao tonu, whakakahoretia ake ake." Ahakoa te nui o tō kaha ki te tiaki i ēnei taonga kia kaua e poke, ka āta huri kōwhai noa iho. Mō te wiki, mō te tau, mō te toru tau rānei, ka mau koe i tētahi pouaka taringa ki te mahi i ia rā, ā, ka huri kōwhai noa iho te hāte mā kāore anō kia mau i roto i te kākahu.
Ina hoki, ko te kōwhai o ngā muka kākahu, ngā kapu hū rapa, me ngā pouaka paneoro kirihou he tohu o te koroheketanga o te pūmua, e mōhiotia ana ko te kōwhai. Ko te kōwhai e pā ana ki te āhuatanga o te whakahekenga, te whakaritenga anō, te hononga whakawhiti rānei i roto i ngā ngota o ngā hua pūmua i te wā e whakamahia ana, i puta mai i te wera, te hihi mārama, te waikura, me ētahi atu āhuatanga, ka hua ake te hanganga o ētahi rōpū mahi tae.
Ko ēnei rōpū tae he hononga takirua waro waro (C=C), he rōpū waroira (C=O), he rōpū imine (C=N), me ērā atu. Ina tae te maha o ngā hononga takirua waro waro honohono ki te 7-8, ka puta he kōwhai. I te nuinga o te wā, ina kite koe kei te tīmata te kōwhai o ngā hua pūmua, ka piki ake te tere o te kōwhai. Nā te mea he mekameka te pakaru o ngā pūmua, ā, ina tīmata te tukanga pakaru, ka rite te pakaru o ngā mekameka ngota ki te domino, ka taka takitahi ia wae.
He maha ngā huarahi hei pupuri i te mā o te rauemi. Mā te tāpiri i te titanium dioxide me ngā kaihoko whakama rama kanapa ka taea te whakarei ake i te pānga whakama o te rauemi, engari kāore e taea te ārai i te kōwhai o te rauemi. Hei whakaroa i te kōwhai o ngā polymer, ka taea te tāpiri i ngā mea whakaū mārama, ngā mea mimiti mārama, ngā kaihoko tinei, me ētahi atu. Ka taea e ēnei momo tāpiri te mimiti i te pūngao e haria ana e te mārama ultraviolet i te rā, ka whakahokia te polymer ki tōna āhua pumau. Ā, ka taea e ngā waikura ārai wera te hopu i ngā rauropi kore utu i puta mai i te waikura, te aukati rānei i te pakaru o ngā mekameka polymer hei whakamutu i te tauhohenga mekameka o te pakaru o te mekameka polymer. He roa te roa o ngā rauemi, ā, he roa hoki te roa o ngā tāpiri. Ahakoa ka taea e ngā tāpiri te whakaroa i te tere o te kōwhai o te polymer, ka ngoikore haere tonu i te wā e whakamahia ana.
Haunga te tāpiri i ngā tāpiringa, ka taea hoki te ārai i te kōwhai o te polymer mai i ētahi atu āhuatanga. Hei tauira, hei whakaiti i te whakamahinga o ngā rauemi i roto i ngā taiao wera nui me te kanapa o waho, me pania he paninga mimiti mārama ki ngā rauemi ina whakamahia ana i waho. Ehara i te mea ko te kōwhai anake te pānga ki te āhua, engari he tohu anō hoki mō te hekenga o te mahi ā-pūkaha o ngā rauemi, te korenga rānei! Ina kōwhai ngā rauemi hanga, me whakakapi wawe tonu ngā mea hou.
Wā tuku: Hakihea-20-2023