I kēia mau lā iho nei, ua hāpai ʻo Sun Rong a me nā mea noiʻi ʻē aʻe e pili ana mai ka Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences i kahi hoʻolālā lapaʻau wela hoʻokahi ʻanuʻu maʻalahi e hoʻomākaukau i nā mea huʻa carbonized melamine (CMF/rGO/Ag) i uhi ʻia i ke kālā māmā/hoʻēmi ʻia. Ua hāʻawi ka mea huʻa melamine composite-carbonized i nā waiwai mechanical maikaʻi loa a me ka hopena pale EMI maikaʻi loa (EMI SE).
ʻO ka piʻi ʻana o nā kamaʻilio 5G a me nā kelepona akamai ua hoʻonui i ka pilikia o ka hoʻopili electromagnetic.
Hiki i ka hoʻopilikia electromagnetic koʻikoʻi ke kumu i ka nalowale ʻana o ka ʻikepili, ka hemahema o ka ʻōnaehana, a me ka hoʻoweliweli i ke olakino kanaka.
ʻO ka hoʻomohala ʻana i nā mea pale pale electromagnetic hana kiʻekiʻe me ka haʻahaʻa haʻahaʻa haʻahaʻa a me ka loli mechanical maikaʻi he ala maikaʻi ia e kāohi ai i ka pollution hawewe electromagnetic pōʻino a i ʻole radiation.
No nā mea metala kuʻuna, ʻo ka hoʻomaikaʻi ʻana i ka conductivity ʻo ia ka hoʻolālā mua no ka loaʻa ʻana o nā mea pale hana kiʻekiʻe.
Eia kekahi, ua hōʻike pū ʻia nā nanomaterials hou e like me ka graphene, carbon nanotubes, a me MXene i loaʻa ka hana pale EMI kiʻekiʻe.
Ma muli o ke kaʻina hana maʻalahi o nā nanomaterials, ua hana ʻia kēia mau mea i loko o ka pahu a i ʻole ke ʻano kiʻiʻoniʻoni no ka pale EMI. Hoʻohālikelike ʻia me ke ʻano o nā nanomaterials, hōʻike nā kiʻi ʻoniʻoni ʻoniʻoni kiʻekiʻe.
Hiki i ka conductivity kiʻekiʻe ke hoʻopuka pololei i ka EMI SE kiʻekiʻe ma o ka hōʻike ikaika ʻana i nā hawewe electromagnetic hanana.
No ka laʻana, ʻoi aku ka nui o ka coefficient noʻonoʻo hawewe electromagnetic o nā metala conductive kiʻekiʻe ma mua o 90%, ʻo ia hoʻi, ʻo 90% o nā hawewe electromagnetic hanana e hōʻike ʻia i loko o kahi ākea.
Hiki i nā hawewe electromagnetic i hōʻike ʻia ke kumu i ka pollution radiation electromagnetic lua. He paʻakikī ka loaʻa ʻana o nā mea pale EMI kiʻekiʻe me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa.
Hoʻokumu ʻia ka mea pale ʻano foam me kahi hale porous. Ma muli o kona kaumaha māmā, hiki ke hoʻopili i ka mīkini a me ka hana pale EMI hiki ke hoʻololi ʻia, hiki iā ia ke hoʻololi i nā mea pale metala paʻa.
ʻO ka mea nui, hiki i ka hana porous ke ʻike i nā mea pale ʻano ʻano huʻa i nā noʻonoʻo nui i nā hawewe electromagnetic i hana ʻia, i hiki ai i ka huʻa ke komo a hoʻemi i nā nalu electromagnetic. Ua hōʻike ʻia e hoʻonui ka porous i ka absorption o nā hawewe electromagnetic e MXene.
Ke hoʻohālikelike ʻia me nā mea paʻa, ʻoi aku ka maikaʻi o ka hoʻohālikelike ʻana i ka hawewe electromagnetic impedance, a hiki ke hana i nā hawewe electromagnetic hanana i loko o ke ʻano o loko o ka pahu pale. No laila, pono e loaʻa i nā mea pale EMI me ka helu haʻahaʻa noʻonoʻo a me ka helu absorption kiʻekiʻe ke kūpono impedance maikaʻi (ka noʻonoʻo haʻahaʻa) a me ka noʻonoʻo nui kiʻekiʻe. No ka laʻana, ua hoʻomākaukau ʻia nā hale papa, nā ʻāpana multi-layer a me nā hale isotropic, me ka EMI SE kiʻekiʻe a me nā coefficient absorption. ʻO ka ʻōlelo maʻamau, ʻo nā hale paʻakikī a me nā ʻāpana he nui e pili ana i ka hoʻoili ʻana i nā ʻanuʻu he nui, a maikaʻi ʻole ka maʻalahi o ka mīkini.
Ua hoʻomākaukau ʻia ka ʻūhā polyimide i hoʻopaʻa ʻia i ke kālā ma ke ʻano hoʻoheheʻe kino, a ʻo kona mānoanoa he 23kg/m3. Ua hoʻomākaukau ʻia ka ʻūhā melamine i hoʻopaʻa ʻia i ke kālā e ka hoʻomoe kemika. ʻO ka melamine foam i hoʻomākaukau ʻia he EMI kiʻekiʻe SE o 90 dB a me kahi waihona kālā o 63.5 wt%. Eia kekahi, ua hoʻolauna ʻia kekahi ʻano hoʻoheheʻe polymethacrylimide i uhi ʻia i ke keleawe/nickel a me ke gula nanoparticle i uhi ʻia i ka polymer-based nanofiber electromagnetic interference pale electroless plating method.
Eia nō naʻe, ma muli o ka like ʻole o ka pilina ma waena o ka metala ʻoʻoleʻa a me ke ʻano maʻalahi, ʻo nā mea pale pahu metala i hoʻomākaukau ʻia e ka electroplating, ka hoʻoheheʻe ʻole ʻia a me ka hoʻoheheʻe kino ʻana i nā waiwai mechanical maikaʻi ʻole. ʻO ka hoʻonui ʻana i ka pilina ma waena o nā ʻāpana metala a me ka ʻiʻo ʻūhā maʻalahi a me ka ʻike ʻana i nā mea pale metala me nā waiwai mechanical maikaʻi loa i piha i nā pilikia.
I loko o kēia noiʻi ʻana, ua noi ka mea kākau i kahi papa hana maʻalahi hoʻokahi ʻanuʻu e hoʻomākaukau ai i ke kālā māmā / hoʻemi i ka graphene oxide i uhi ʻia i ka melamine carbonized (CMF/rGO/Ag) mea hoʻoheheʻe ʻia, nona nā waiwai mechanical maikaʻi loa a me ka hopena pale EMI maikaʻi loa (EMI SE). Ma muli o ka hoʻonui ʻia ʻana ma waena o ke kaʻina hana a me ke kālā, ua hōʻike ka ʻūhā CMF/rGO/Ag i ke kūpaʻa maikaʻi loa ma hope o 1000 hoʻouka-unloading compression hōʻike pōkā. Eia kekahi, ua hiki i ka EMI SE o ka hu'ahu'a i ka 50.6 dB ma kahi kiko'ī o 16 mg cm2 g-1 wale nō a me kahi kiko'ī Ag ultra-ha'aha'a o 0.09 vol%.
ʻO ka mea e mahalo ai, ʻo ka hui pū ʻana o ka porous framework a me nā mea hoʻopili he nui i hopena i ka coefficient absorption kiʻekiʻe (ma luna o 0.5) o ka CMF/rGO/Ag foam. Ua aʻo hou ʻia ka ʻōnaehana pale coefficient absorption kiʻekiʻe o CMF/rGO/Ag foam e ka finite element analysis (FEA). Hōʻike ka hana pale EMI kokoke kokoke i ka pahu CMF / rGO / Ag i ka haʻahaʻa haʻahaʻa, ikaika CMF / rGO / Ag foam i loaʻa nā pōmaikaʻi nui a me nā manaʻo noi ākea e like me nā mea pale EMI no ka hoʻopili uila.