- 专利标题： Multilayer radar-absorbing laminate for aircraft made of polymer matrix composite material with graphene nanoplatelets, and method of manufacturing same
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申请号： US16976988申请日： 2019-03-01
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公开(公告)号： US11597192B2公开(公告)日： 2023-03-07
- 发明人: Luigi Pisu , Gianni Iagulli , Maria Sabrina Sarto , Fabrizio Marra , Julian Lecini , Alessio Tamburrano
- 申请人： LEONARDO S.P.A.
- 申请人地址： IT Rome
- 专利权人： LEONARDO S.P.A.
- 当前专利权人： LEONARDO S.P.A.
- 当前专利权人地址： IT Rome
- 代理机构： Armstrong Teasdale LLP
- 优先权： IT102018000003182 20180301
- 国际申请： PCT/IB2019/051656 WO 20190301
- 国际公布： WO2019/167009 WO 20190906
- 主分类号： B32B27/12
- IPC分类号： B32B27/12 ; B29C70/02 ; B29C70/88 ; B32B17/04 ; C08J5/24 ; B82Y30/00 ; B82Y40/00
摘要：
A multilayer radar-absorbing laminate includes three juxtaposed blocks.
A first electrically conductive block is arranged toward the inside of the aircraft in use.
A second electromagnetic intermediate absorber block has a layer of electrically non-conductive fiber sheets is permeated by graphene-based nanoplatelets to achieve a periodic and electromagnetically subresonant layer, the conductive layers containing graphene nanoplatelets alternating with non-conductive layers.
A third block of electrically non-conductive material is arranged towards the outside and forms part of the outer surface of the aircraft. The second block is produced by depositing on the fiber sheets a suspension of graphene nanoplatelets in a polymeric mixture, with controlled penetration of the graphene nanoplatelets into the fiber sheets. A plurality of dry fiber sheets sprayed with the suspension of graphene nanoplatelets is superimposed. An unpolymerized thermosetting synthetic resin is infused into a lay-up made of the first, second and third blocks. Afterwards, the thermosetting resin is polymerized.
A first electrically conductive block is arranged toward the inside of the aircraft in use.
A second electromagnetic intermediate absorber block has a layer of electrically non-conductive fiber sheets is permeated by graphene-based nanoplatelets to achieve a periodic and electromagnetically subresonant layer, the conductive layers containing graphene nanoplatelets alternating with non-conductive layers.
A third block of electrically non-conductive material is arranged towards the outside and forms part of the outer surface of the aircraft. The second block is produced by depositing on the fiber sheets a suspension of graphene nanoplatelets in a polymeric mixture, with controlled penetration of the graphene nanoplatelets into the fiber sheets. A plurality of dry fiber sheets sprayed with the suspension of graphene nanoplatelets is superimposed. An unpolymerized thermosetting synthetic resin is infused into a lay-up made of the first, second and third blocks. Afterwards, the thermosetting resin is polymerized.
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