Te Tukanga Hanga Kirihou Polystyrene me Tōna Whakamahinga i roto i te Tākai Kai
Ko te kirihou polystyrene, e mōhiotia whānuitia ana ko te polystyrene i te reo Pākehā, he momo kirihou maha-whakamahinga e whakamahia whānuitia ana i roto i ngā momo ahumahi, tae atu ki te takai kai. Ka matapakihia e tēnei tuhinga te tukanga hanga polystyrene me ōna whakamahinga i roto i te takai kai.
He Hītori Poto me te Hanganga Matū o te Polystyrene
I hangaia tuatahitia te polystyrene e Edward Simon i te tau 1839. Heoi, tae noa ki te tekau tau atu i 1930 ka whakawhanakehia te polystyrene hei rauemi arumoni e te kamupene Tiamana IG Farben. Ko te polystyrene he pūhui kakara i hangaia mai i te monomer styrene, he matū vinylbenzene. Ko tōna hanganga matū he mea hanga mai i ngā waeine monomer styrene e tāruarua ana:
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Ko \(C_6H_5\) he mowhiti phenyl e hoatu ana ki te polystyrene ōna āhuatanga motuhake pērā i te pakari me te roa.
Te Tukanga Whakaputa Polystyrene
1. Te Hanganga o te Styrene Monomer:
Ka tīmata te tukanga hanga polystyrene mā te hanga i te styrene monomer. Ka hangaia te styrene mā te tango i te hauwai o te ethylbenzene, ā, he maha ngā mahi e whai ake nei:
– Te whakapūkara o te benzene: Ka tauhohe te benzene ki te ethylene hei hanga i te ethylbenzene i te aroaro o tētahi whakakorikori waikawa.
– Te tango i te hauwai o te ethylbenzene: Muri iho, ka whakamahanahia te ethylbenzene ki te pāmahana teitei (tata ki te 600-650°C) me te whakakorikori waikura rino hei whakaputa i te styrene me te hauwai.
2. Te Whakapūhuitanga o te Styrene:
Kātahi ka whakapūhuitia te styrene e puta mai ana hei hanga polystyrene. He maha ngā tikanga whakapūhui ka taea te whakamahi, tae atu ki te whakapūhui papatipu, te whakatārewatanga, me te whakapūhui emulsion. Heoi, ko te mea tino noa ko te whakapūhui whakatārewatanga, e whai ake nei ngā mahi:
– Tīmatanga: Ka tīmata te whakapūhuitanga me te whakaoho i ngā rauropi kore utu e meinga ai te styrene kia hanga i ngā rauropi kore utu.
– Te Whakatipu: Ka kukume mai ngā rauropi kore utu mai i ngā monomer i ētahi atu monomer, ka hanga he mekameka pūmua roa.
– Whakamutu: Ka haere tonu tēnei tukanga kia tae rā anō te pūhui ki te roa ngota e hiahiatia ana, ā, kia mutu rā anō te tauhohenga.
3. Te Whakaputa me te Hanga:
I muri i te tukanga whakapūhui, ka puta te polystyrene i te āhua o ngā pirepire, o ngā pūmua rānei. Kātahi ka whakamaroketia ngā pūmua polystyrene, ka whakarewahia mā te whakamahi i tētahi mīhini whakaputa. Mā tēnei tukanga whakaputa ka taea te hanga i te rauemi ki ngā āhua rerekē e hiahiatia ana, pērā i ngā rau mō ngā takai kai.
Ngā Whakamahinga o te Polystyrene i roto i te Tākai Kai
He maha ngā momo o te Polystyrene i runga i tōna hanganga me ōna āhuatanga, tae atu ki:
– Polystyrene Whānui (GPPS): He mārama, he pakarukaru hoki ōna āhuatanga, e whakamahia ana mō ngā hua whakakorekore pērā i ngā pūnu kirihou, ngā marau, me ngā pereti.
– Polystyrene Pānga Teitei (HIPS): He mea hanga ki te rapa butadiene, he nui ake te ātete, ā, e whakamahia ana mō te tākai i ngā hua e hiahia ana kia tino pakari.
– Pahuka Polystyrene Whakawhanui (EPS): He pai ngā āhuatanga ārai o tēnei rauemi, ā, he mama hoki, ka whakamahia mō ngā ipu kai pēnei i te styrofoam.
Te Tākai Kai Polystyrene
He maha ngā take matua e whakamahia whānuitia ana te polystyrene i roto i te umanga takai kai, tae atu ki tōna mama, te iti o te utu, me te ngāwari ki te whakakorikori. Anei ētahi whakamahinga motuhake o te polystyrene i roto i ngā takai kai:
1. Ngā Ipu Kai Tere:
Ko tētahi o ngā whakamahinga tino noa ko ngā ipu Styrofoam mō ngā kai tere. He pai ngā āhuatanga ārai o ēnei ipu, ā, ka roa ake te wera me te makariri o te kai.
2. Ngā Kapu me ngā Pereti Kirihou:
He maha ngā wā ka hangaia ngā kapu, ngā pereti, me ngā taputapu kai (pūnu, marau) mai i te polystyrene noa, i te HIPS rānei nā te mea he mārama, he ātete hoki ki te pānga.
3. Tākai Mīti me te Ika:
Ka tākaihia te mīti me te ika ki ngā paepae polystyrene kua whakakikoruatia ki te kiriata kirihou. Ka āwhina ēnei paepae ki te pupuri i te makuku me te whakapai ake i te āhua o te hua.
4. Tākai Hua Manu:
E whakamahia ana te pahuka polystyrene mō ngā hua manu nā te mea he āhuatanga mimiti ru, ā, he pai ake te tiaki i ngā hua mai i te pakaru i te wā e tohatoha ana.
5. Paepae Kai me te Inu:
He maha ngā wā ka whakamahia ngā paepae polystyrene hei tuku kai me ngā inu i ngā wāhi pēnei i ngā wharekai, ngā wharekai, me ngā pouaka kai rererangi.
Ngā Āwangawanga Taiao me ngā Mahi Hangarua
Ahakoa ōna painga maha, ka ara ake anō hoki ngā āwangawanga mō te taiao i te whakamahinga o te polystyrene i roto i ngā takai kai. He rauemi kore e pirau te polystyrene, ā, ka whai wāhi atu ki te raruraru para kirihou e taumaha ana ki te taiao.
1. Te Whakaiti me te Whakakapinga:
He maha ngā kāwanatanga me ngā whakahaere taiao e tohe ana kia whakaitihia te whakamahinga o ngā hua polystyrene kotahi te whakamahinga, kia whakakapia ki ngā rauemi e pai ake ana ki te taiao pērā i te kirihou koiora, te kāri rānei.
2. Te hangarua:
Hei tāpiritanga, he taahiraa nui te hangarua o te polystyrene ki te whakaiti i tōna pānga. Ko te tukanga hangarua ko te kohikohi, te whakarōpū, te horoi, me te tukatuka anō i te polystyrene hei hua hou.
3. Auahatanga Hangarau:
Kei te whakawhanakehia hoki ngā auahatanga maha hei whakapai ake i te taiao o te polystyrene, tae atu ki ngā hangarau e tere ake ai te pirau o te polystyrene, te whakamahi rānei i ngā rauemi mata mai i ngā pūtake hou.
Whakamutunga
He mea nui te polystyrene i roto i te umanga takai kai nā te mea he maha ngā whakamahinga, he māmā, he iti hoki te utu. He maha ngā wāhanga o tana tukanga whakaputa, mai i te hanga i ngā monomers styrene ki te polymerization me te hanganga o ngā hua whakamutunga kua whakaritea. Ahakoa ōna painga maha, he mea nui kia whakahaerea te polystyrene me te whakaaro nui kia whakaitihia ai tōna pānga kino ki te taiao, kia tautokohia ai hoki ngā mahi hangarua pumau.
Ko te whakamahinga whakaaro nui, ā, muri iho ko ngā mahi auaha ki te whakaiti i tōna tapuwae taiao, koinei te kī ki te pumau o te whakamahinga o te polystyrene ā muri ake nei.
