N'oge na-adịbeghị anya, Sun Rong na ndị nchọpụta ndị ọzọ metụtara ya sitere na Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences tụrụ aro usoro ọgwụgwọ okpomọkụ dị mfe otu nzọụkwụ iji kwadebe ihe mkpuchi ụfụfụ melamine carbonized carbonized (CMF/rGO/Ag) nke dị mfe nke ejiri ọlaọcha/grafene oxide kpuchie. Ihe mkpuchi melamine nke ejiri carbonized-composite mee nyere ezigbo ihe owuwu igwe na mmetụta nchekwa EMI dị mma (EMI SE).
Mmụba nke nzikọrịta ozi 5G na smart phone emela ka nsogbu nke nnyonye anya electromagnetic ka njọ.
Nnukwu nnyonye anya electromagnetic nwere ike ime ka data mfu, ọdịda sistemụ, na ọbụna tinye ahụike mmadụ n'ihe egwu.
Mmepe nke ihe mgbochi nnyonye anya elektrọnik na-arụ ọrụ dị elu nwere njupụta dị ala yana ezigbo mgbanwe igwe bụ ụzọ dị irè isi gbochie mmetọ ikuku electromagnetic na-emerụ ahụ ma ọ bụ radieshon.
Maka ihe igwe oji ọdịnala, imeziwanye conductivity bụ atụmatụ bụ isi maka inweta ihe nchekwa dị elu.
Na mgbakwunye, nanomaterials ọhụrụ dị ka graphene, carbon nanotubes, na MXene akọwokwa na ha nwere ọrụ nchekwa EMI dị elu.
N'ihi usoro mmepụta nke nanomaterials nke ukwuu na-agbanwe agbanwe, a na-edozi ihe ndị a ka ọ bụrụ ụfụfụ ma ọ bụ ihe nkiri maka mkpuchi EMI. E jiri ya tụnyere ụdị nanomaterials nke na-afụ ụfụfụ, ihe nkiri dị oke egwu na-egosipụta arụmọrụ dị elu.
Nrụgharị dị elu nwere ike iwepụta EMI SE dị elu ozugbo site n'igosipụta ebili mmiri electromagnetic merenụ.
Ọmụmaatụ, ọnụọgụ electromagnetic ebili mmiri nke ọla na-eduzi nke ukwuu na-akarị 90%, nke pụtara na 90% nke ebili mmiri electromagnetic merenụ ga-egosipụta n'ime oghere efu.
Ebili mmiri elektrọnik a na-egosipụta nwekwara ike ịkpata mmetọ ọkụ ọkụ nke abụọ. Ọ ka bụ ihe ịma aka iji nweta ihe mkpuchi EMI dị elu nke nwere ọnụọgụ ntụgharị eletrọnịkị dị ala.
Ihe mkpuchi ụdị ụfụfụ bụ nke nwere oghere nwere oghere. N'ihi ịdị arọ ya dị mfe, ezigbo mkpakọ igwe na arụ ọrụ nchekwa EMI na-agbanwe agbanwe, ọ nwere nnukwu ikike iji dochie ihe mkpuchi ọla siri ike nke ọdịnala.
Karịsịa, ihe owuwu porous na-enyere ihe mkpuchi ụdị ụfụfụ ahụ nwee ọtụtụ ntụgharị uche doro anya na ebili mmiri electromagnetic merenụ, nke mere na ụfụfụ ahụ nwere ike ịmịkọrọ ma belata ebili mmiri electromagnetic. A kọwawo na ihe owuwu porous ga-eme ka nnabata nke ebili mmiri electromagnetic site na MXene.
E jiri ya tụnyere ihe siri ike, ihe owuwu porous nwere ikike dabara adaba nke ọma, ma nwee ike ime ka ebili mmiri electromagnetic banye n'ime usoro nke ụfụfụ mkpuchi. Ya mere, ihe mkpuchi EMI nwere ọnụọgụ ntụgharị dị ala na ọnụọgụ absorption dị elu kwesịrị inwe ezigbo impedance matching (ntụgharị uche dị ala) na nnukwu ntụgharị uche dị elu. Dịka ọmụmaatụ, a kwadowo ihe owuwu dị larịị, ihe owuwu dị iche iche na ihe owuwu isotropic, yana EMI SE dị elu na ọnụọgụ absorption. N'ikwu okwu n'ozuzu, ihe owuwu dị mgbagwoju anya na ọtụtụ ihe mejupụtara na-agụnye nhazi ọtụtụ nzọụkwụ, na ngbanwe nke igwe adịghị mma.
A na-akwadebe ụfụfụ polyimide nke ọlaọcha a na-etinye site na usoro ịgbasa anụ ahụ, na njupụta ya bụ 23kg / m3. A na-edozi ụfụfụ melamine nke nwere ọlaọcha site na ntinye kemịkal. Ọfụfụ melamine ọlaọcha a kwadebere nwere EMI dị elu SE nke 90 dB yana ọdịnaya ọlaọcha nke 63.5 wt%. Na mgbakwunye, a na-atụkwa aro ka a na-etinye ọla kọpa / nickel polymethacrylimide ngwakọ ụfụfụ na ọla edo nanoparticle mkpuchi polymer dabere nanofiber electromagnetic nnyonye anya na-echebe usoro plating electroless.
Otú ọ dị, n'ihi na e pụta ụwa interface mismatch n'etiti isiike metal na eku na-agbanwe, na metal ụfụfụ ihe mkpuchi nke a kwadebere site electroplating, electroless plating na anụ ahụ spraying nwere adịghị mma n'ibu Njirimara. Ịkwalite njikọ dị n'etiti irighiri ígwè na ọkpụkpụ ụfụfụ na-agbanwe agbanwe na ịmara ihe mkpuchi igwe ụfụfụ nke nwere ihe ndị dị mma na-arụ ọrụ ka jupụtara na nsogbu.
N'ime ọmụmụ ihe a, onye edemede ahụ tụrụ aro usoro ọgwụgwọ okpomọkụ dị mfe nke otu nzọụkwụ iji kwadebe ọlaọcha dị arọ / mbelata graphene oxide mkpuchi carbonized melamine (CMF / rGO / Ag), nke nwere ihe ndị dị mma na-arụ ọrụ na ihe nchebe EMI dị mma (EMI SE). N'ihi nkwalite nkwalite n'etiti usoro ihe mejupụtara ya na ọlaọcha ahụ, ụfụfụ CMF / rGO / Ag gosipụtara nkwụsi ike nhazi dị mma mgbe 1000 loading-unloading compression cycles. Na mgbakwunye, EMI SE nke ụfụfụ ahụ ruru 50.6 dB na njupụta nke naanị 16 mg cm2 g-1 yana ọdịnaya Ag ultra-low nke 0.09 vol.
N'ụzọ na-akpali mmasị, imekọ ihe ọnụ nke usoro porous na ọtụtụ oghere butere ọnụ ọgụgụ nnabata dị elu na-enweghị atụ (karịa 0.5) nke ụfụfụ CMF/rGO/Ag. A na-amụkwa usoro nchekwa ọnụọgụ dị elu nke CMF/rGO/Ag foam site na nyocha mmecha (FEA). Ọrụ nchekwa nchekwa EMI dị nso nke CMF/rGO/Ag foam na-egosi na obere njupụta, ụfụfụ CMF/rGO/Ag siri ike nwere nnukwu uru na atụmanya ngwa sara mbara dị ka ihe mkpuchi EMI maka nkwakọ ngwaahịa eletrọnịkị.