ʻO ka lāʻau maoli a me ka metala nā mea kūkulu hale pono no nā kānaka no nā kaukani makahiki. ʻO nā polymers synthetic a mākou i kapa ai he plastics kahi mea hou i pahū i ke kenekulia 20.
Loaʻa i nā metala a me nā plastics nā waiwai i kūpono no ka hoʻohana ʻana i ka ʻoihana a me ka ʻoihana. Hoʻolako a hoʻomaʻemaʻe i kā lākou huahana. Hāʻawi ka plastik i kekahi o nā hana o ka metala ʻoiai e koi ana i ka liʻiliʻi o ka nui a he mea maʻalahi loa ka hana. ʻO ka mea maikaʻi, ʻaʻohe mea makemake e noho i loko o ka hale plastik.
Ma kekahi mau noi, hiki i ka laau maoli ke paio me na metala a me na plastic. Ua kukuluia ka hapa nui o na hale o ka ohana ma ke kalai laau. ʻO ka pilikia, he palupalu loa ka lāʻau maoli a maʻalahi loa ka pohō ʻia e ka wai e pani ai i ka plastic a me ka metala i ka hapa nui o ka manawa. paʻi ʻia ma ka puke pai Matter e ʻimi ana i ka hana ʻana i kahi mea lāʻau paʻakikī e lanakila ana i kēia mau palena.
ʻO ka fibrous hale o ka lāʻau aia ma kahi o 50% cellulose, he polymer maoli me nā waiwai ikaika theoretically maikaʻi. ʻO ke koena hapa o ka hale lāʻau he lignin a he hemicellulose. ʻO ka ikaika, he liʻiliʻi ke ʻano o ka hemicellulose a no laila ʻaʻohe mea e kōkua i ka ikaika o ka lāʻau. Hoʻopiha ʻo Lignin i nā hakahaka ma waena o nā fiber cellulose a hana i nā hana pono no ka lāʻau ola. he mea keakea.
I loko o kēia noiʻi ʻana, ua hana ʻia ka lāʻau maoli i lāʻau paʻakikī (HW) i ʻehā mau ʻanuʻu. ia i loko o kahi paʻi no kekahi mau hola ma ka lumi wela. ʻO kēia ka mea e hōʻemi ai i nā āpau kūlohelohe a i ʻole nā pores i loko o ka lāʻau a hoʻonui i ka hoʻopaʻa ʻana kemika ma waena o nā fibers cellulose pili. hola e hoʻopau i ka densification, a laila hoʻomaloʻo.Finally, ua hoʻokomo ʻia ka lāʻau i loko o ka ʻaila mineral no nā hola 48 e hana i ka wai o ka huahana i hoʻopau ʻia.
One mechanical waiwai o ka structural mea o ka indentation paakiki, o ia ke ana o kona hiki ke pale aku i ka deformation i ka wā e squeezed e force.Diamond mea paakiki ma mua o kila, paʻakikī ma mua o ke gula, paakiki ma mua o ka laau, a paakiki ma mua o ka packing foam.Among the many engineering nā ho'āʻo i hoʻohanaʻia e hoʻoholo i ka paʻakikī, e like me ka paʻakikī Mohs i hoʻohanaʻia i ka gemology,ʻo ka ho'āʻo Brinell kekahi o lākou. He mea maʻalahi kona manaʻo: hoʻokomoʻia kahi pōpō metala paʻakikī i kaʻili ho'āʻo me kekahi ikaika. E ana i ke anawaena o ka pōʻai. indentation i hana 'ia e ka poepoe. Ua helu 'ia ka waiwai pa'akikī Brinell me ka ho'ohana 'ana i ka helu makemakika;ʻO ka ʻoi aku ka nui o ka lua o ka pōleʻa, ʻoi aku ka palupalu o ka mea.
ʻO ka hapa nui o ka lāʻau maoli ʻaʻole i hoʻomaʻamaʻa ʻia e komo i ka wai. Hiki i kēia ke hoʻonui i ka lāʻau a hoʻopau hope i kona mau waiwai. ʻO ka hoʻāʻo hydrophobicity e kau i kahi kulu o ka wai ma luna o ka ʻili. ʻoi aku ka maʻalahi o ka hoʻomoʻa ʻana i ka wai). No laila, ʻaʻole i hoʻonui nui ʻia ka hoʻoulu ʻana o ka mineral i ka hydrophobicity o ka HW, akā pale pū nō hoʻi i ka lāʻau mai ka lawe ʻana i ka wai.
Ma kekahi mau ho'āʻo 'enekinia, HW pahi i hana iki maikaʻi ma mua o metala pahi.'Ōlelo nā mea kākau i ka pahi HW ma kahi oʻekolu manawa e like me ka pahi i loaʻa i ke kālepa. a i ʻole ka mea paha mākou e kapa ai he pahi pata. ʻAʻole i manaʻo ʻia kēia i mea ʻoi loa. Hōʻike nā mea kākau i kahi wikiō o kā lākou pahi e ʻoki ana i kahi steak, akā hiki i ke kanaka makua ikaika ke ʻoki i ka steak hoʻokahi me ka ʻaoʻao ʻūlū o ka ʻōpala metala, a ʻoi aku ka maikaʻi o ka pahi steak.
Pehea e pili ana i na kui? Hiki i ka HW hoʻokahi kui ke hoʻopaʻa maʻalahi i nā papa ʻekolu, ʻoiai ʻaʻole i like ka kikoʻī e like me ka maʻalahi o ka hoʻohālikelike ʻia me nā kui hao. kaawale ia lakou, me ka oolea like me na kui hao. I ko lakou hoao ana nae, ua haule na papa ma na hihia elua mamua o ka haule ana o na kui, no laila, aole i hoikeia na kui ikaika.
Ua ʻoi aku ka maikaʻi o nā kui HW ma nā ʻano ʻē aʻe? ʻOi aku ka māmā o nā mākia lāʻau, akā ʻaʻole i hoʻokele mua ʻia ke kaumaha o ka hale e ka nui o nā mākia e paʻa ai. biodecompose.
ʻAʻohe mea kānalua ua hoʻomohala ka mea kākau i kahi kaʻina hana e ʻoi aku ka ikaika o ka lāʻau ma mua o ka lāʻau maoli. Akā naʻe, pono ke aʻo hou ʻana i ka pono o ka ʻenehana no kekahi hana. 'Oi aku ka maika'i, me ka ho'ohana hou 'ana i nā mea metala?
Ka manawa kau: Apr-13-2022
