Munguva pfupi yapfuura, Sun Rong nevamwe vaongorori vane chekuita nazvo vanobva kuShenzhen Institute of Advanced Technology, Chinese Academy of Sciences vakapa zano rekugadzirisa kupisa kwematanho rimwe chete kugadzira zvinhu zvefoam zvesirivha/zvakaderedzwa graphene oxide zvakaputirwa necarbonized melamine (CMF/rGO/Ag). Foam yemelamine yakagadzirwa necarbonized-composite yakapa hunhu hwakanaka hwemakanika uye EMI shielding effect yakanaka (EMI SE).
Kusimuka kwe5G kutaurirana uye mafoni akachenjera kwakawedzera dambudziko rekukanganiswa kwemagetsi.
Kukanganisa kwakanyanya kwemagetsi kunogona kukonzera kurasikirwa kwedata, kutadza kwehurongwa, uye kunyange kuisa hutano hwevanhu pangozi.
Iko kuvandudza kwepamusoro-inoshanda emagetsi kupindira ekudzivirira zvinhu zvine ultra-low density uye yakanaka mechaniki inoshanduka inzira inoshanda yekudzvinyirira inokuvadza magetsi emagetsi kusvibiswa kana radiation.
Kune zvechinyakare simbi zvinhu, kunatsiridza conductivity yagara iri yekutanga nzira yekuwana yakakwirira-inoshanda nhovo zvinhu.
Pamusoro pezvo, mananomaterials matsva akadai segraphene, kabhoni nanotubes, uye MXene anonziwo ane yakakwira EMI kudzivirira kuita.
Nekuda kweiyo inoshanduka-shanduka yekugadzira maitiro emananomaterials, zvinhu izvi zvinogadziriswa kuita furo kana firimu fomu reEMI kudzivirira. Kuenzaniswa neiyo foamed fomu yemananomaterials, dense mafirimu anoratidza yakakwirira conductivity.
Yakakwira conductivity inogona kuburitsa yakakwira EMI SE zvakananga nekuratidzira zvakanyanya chiitiko chemagetsi mafungu.
Semuenzaniso, iyo electromagnetic wave reflection coefficient yeakanyanya conductive simbi inowanzopfuura 90%, zvinoreva kuti 90% yechiitiko chemagetsi mafungu anozoratidzwa munzvimbo yemahara.
Iwo anoratidzwa emagetsi mafungu anogona zvakare kukonzera yakakomba yechipiri electromagnetic mwaranzi kusvibiswa. Zvichiri kunetsa kuwana yakakwirira-inoshanda EMI yekudzivirira zvinhu zvine yakaderera electromagnetic wave reflection coefficient.
Iyo furo-mhando yekudzivirira zvinhu inoumbwa ne porous chimiro. Nekuda kwehuremu hwayo, yakanaka mechanical compressibility uye inogadziriswa EMI kudzivirira kuita, ine mukana wakakura mukutsiva zvechinyakare zvakaomarara simbi zvivharo.
Kunyanya, iyo porous dhizaini inogonesa furo-mhando yekudzivirira zvinhu kuti ive pachena akati wandei maratidziro pachiitiko chemagetsi mafungu, kuitira kuti furo rikwanise kubata uye kudzikamisa mafungu emagetsi. Izvo zvave zvichishumwa kuti iyo porous dhizaini inosimudzira kutorwa kwemagetsi mafungu emagetsi neMXene.
Kuenzaniswa nezvinhu zvakasimba, iyo porous dhizaini ine zvirinani electromagnetic wave impedance yekufananidza kugona, uye inogona kuita chiitiko chemagetsi mafungu achipinda mukati memukati mefuro rinodzivirira. Naizvozvo, EMI yekudzivirira zvinhu zvine yakaderera inoratidzira coefficient uye yakakwira yekunyudza coefficient inofanirwa kuve yakanaka impedance yekufananidza (yakaderera kuratidza) uye yakakwira yakawanda kuratidza. Semuenzaniso, zvimiro zvakaturikidzana, akawanda-layer zvimiro uye isotropic zvimiro zvakagadzirirwa, zvine yakakwira EMI SE uye absorption coefficients. Kazhinji kutaura, zvimiro zvakaoma uye akawanda-zvikamu zvinowanzo sanganisira akawanda-nhanho kugadzirisa, uye kuchinjika kwemuchina kwakashata.
Sirivha-yakaputirwa polyimide furo yakagadzirwa nemuviri wekupfapfaidza nzira, uye density yayo yaive 23kg/m3. Sirivha-yakaputirwa melamine foam yakagadzirwa nemakemikari deposition. Iyo yakagadziridzwa sirivheri-yakaputirwa melamine foam ine EMI yakakwira SE ye90 dB uye sirivheri ye63.5 wt%. Pamusoro pezvo, mhangura / nickel yakavharwa polymethacrylimide furo rakasanganiswa uye goridhe nanoparticle yakavharwa polymer-based nanofiber electromagnetic kupindira kudzivirira electroless plating nzira inokurudzirwa zvakare.
Nekudaro, nekuda kweiyo inherent interface kusawirirana pakati pesimbi yakaoma uye inochinjika furemu, simbi furo yekudzivirira zvinhu zvakagadzirirwa ne electroplating, electroless plating uye kupfapfaidza kwepanyama zvine hurombo hwemagetsi zvimiro. Kuvandudza hukama pakati pezvimedu zvesimbi uye inochinjika furo skeleton uye kuona simbi furo yekudzivirira zvinhu zvine yakanakisa mechaniki zvimiro zvichiri kuzere nematambudziko.
Muchidzidzo ichi, munyori akaronga nhanho imwe-nhanho yekupisa yekurapa nzira yekugadzira isingaremi sirivha / yakaderedzwa graphene oxide yakanamirwa kabhoni melamine (CMF/rGO/Ag) inoumbwa foam zvinhu, ine yakanakisa michina zvivakwa uye Yakanakisa EMI kudzivirira mhedzisiro (EMI SE). Nekuda kweiyo yakakwidziridzwa interface pakati peiyo composite framework uye sirivheri, iyo CMF/rGO/Ag furo yakaratidza yakanakisa kugadzikana kwechimiro mushure me1000 kurodha-kuburutsa-kumisikidza yekumisikidza miyedzo. Pamusoro pezvo, iyo EMI SE yefuro yakasvika 50.6 dB pahuwandu hwe16 mg cm2 g-1 chete uye iyo yekupedzisira-yakaderera Ag ye0.09 vol%.
Sezvineiwo, kushandira pamwe kweiyo porous framework uye akawanda mainterfaces kwakakonzera kusajairika kwakakwira kunyura coefficient (kupfuura 0.5) yeCMF/rGO/Ag furo. Iyo yakakwira yekunyudza coefficient yekudzivirira nzira yeCMF/rGO/Ag furo yakawedzera kudzidzwa nefinite element analysis (FEA). Iyo yakanakisa padyo-munda EMI kudzivirira kuita kweCMF/rGO/Ag furo rinoratidza kuti yakaderera-density, yakasimba CMF/rGO/Ag furo ine mabhenefiti makuru uye yakafara tarisiro yekushandisa seEMI inodzivirira zvinhu zvemagetsi kurongedza.