High thermal conductivity mapurasitiki anoratidza matarenda anoshamisa mu transformer inductors, electronic component heat dissipation, special cables, electronic packaging, thermal potting nemamwe minda yekushanda kwavo kwakanaka, mutengo wakaderera uye yakanakisa yekupisa conductivity.Yakakwira yemafuta conductivity mapurasitiki ane graphene seyekuzadza anogona kusangana nezvinodiwa zvehupamhi hwepamusoro uye yakakwirira yekubatanidza gungano kusimudzira mune yekupisa manejimendi uye indasitiri yemagetsi.

Mapurasitiki anopisa anopisa anonyanyozadzwa nesimbi yakakwira-inoitisa simbi kana inorganic filler particles kuzadza zvakafanana polymer matrix zvinhu.Kana huwandu hwekuzadza hwasvika pane imwe nhanho, iyo yekuzadza inoumba cheni-yakaita uye network-senge morphology muhurongwa, kureva, thermally conductive network chain.Kana iyo yekumisikidzwa yeiyi kupisa conductive mesh cheni ichienderana neinoyerera kupisa mafambiro, iyo yekupisa conductivity yehurongwa inovandudzwa zvakanyanya.

High thermal conductive mapurasitiki anecarbon nanomaterial graphenesezvo filler inogona kusangana nezvinodiwa zvehupamhi hwepamusoro uye yakakwirira yekubatanidza gungano kusimudzira mune yekupisa manejimendi uye indasitiri yemagetsi.Semuenzaniso, thermal conductivity ye pure polyamide 6 (PA6) ndeye 0.338 W / (m · K), kana yakazadzwa ne 50% alumina, thermal conductivity yemusanganiswa ndeye 1.57 nguva yePA6 yakachena;paunowedzera 25% iyo yakagadziridzwa zinc oxide, iyo inopisa conductivity yemusanganiswa yakapetwa katatu kupfuura iyo yakachena PA6.Kana iyo 20% graphene nanosheet yawedzerwa, kupisa kwekupisa kweiyo composite kunosvika 4.11 W/(m•K), iyo inowedzerwa nekanopfuura kagumi neshanu pane yakachena PA6, iyo inoratidza hukuru hwekugona kwegraphene mumunda wekupisa kwekutonga.

1. Kugadzirira uye kupisa kwekushisa kwegraphene / polymer composite

Iyo yekupisa conductivity yegraphene/polymer composites haiparadzaniswe kubva mumamiriro ekugadzirisa mugadziriro yekugadzirira.Nzira dzakasiyana dzekugadzirira dzinoita mutsauko mukupararira, chiito chemukati uye chimiro chepakati chekuzadza mumatrix, uye zvinhu izvi zvinotarisa kuoma, simba, kuoma uye ductility yemubatanidzwa.Nezvekutsvagisa kwazvino kuri kuita, kune ma graphene/polymer macomposites, dhigirii rekupararira kwegraphene uye dhigirii rekupeuka kwegraphene mapepa anogona kudzorwa nekudzora shear, tembiricha uye polar solvents.

2. Zvinhu zvinokanganisa kushanda kwegraphene zvakazadza mapurasitiki epamusoro ekupisa

2.1 Kuwedzera huwandu hweGraphene

Mune yakakwira yekupisa conductivity ipurasitiki yakazadzwa negraphene, sezvo huwandu hwegraphene hunowedzera, thermal conductive network cheni inoumbwa zvishoma nezvishoma muhurongwa, iyo inovandudza zvakanyanya kupisa kwemafuta ezvakagadzirwa zvinhu.

Nokudzidza kupisa kwemafuta epoxy resin (EP) -based graphene composites, zvinoonekwa kuti chiyero chekuzadza chegraphene (inenge 4 layers) chinogona kuwedzera kupisa kwekupisa kweEP nekanosvika makumi matatu kusvika ku6.44.W/(m•K), nepo zvechinyakare zvinopisa conductive mafirita zvinoda 70% (vhoriyamu chikamu) chemuzadzisi kuti uwane izvi.

2.2 Nhamba yezvikamu zveGraphene
Kune multilayers graphene, chidzidzo pa1-10 akaturikidzana egraphene akawana kuti kana nhamba yegraphene layer yakawedzera kubva pa2 kusvika pa4, thermal conductivity yakadzikira kubva pa2 800 W/(m•K) kusvika 1300 W/(m•K) )Izvi zvinotevera kuti thermal conductivity yegraphene inowanzodzikira nekuwedzera kwenhamba yezvikamu.

Izvi zvinodaro nekuti iyo multilayer graphene ichaita agglomerate nekufamba kwenguva, izvo zvinozokonzeresa kuti kupisa kuderera.Panguva imwecheteyo, kukanganisa mu graphene uye kusagadzikana kwepamucheto kuchaderedza kupisa kwekupisa kwe graphene.

2.3 Mhando dze substrate
Izvo zvakakosha zveyakakwira thermal conductivity mapurasitiki anosanganisira matrix zvinhu uye mafirita.Graphene ndiyo yakanakisa sarudzo yemafillers nekuda kweiyo yakanakisa thermal conductivity.Different matrix compositions inokanganisa thermal conductivity.Polyamide (PA) ine yakanaka mechanicha zvivakwa, kupisa kupisa, kupfeka kuramba, kuderera kukweshera coefficient, kumwe kunonoka kwemurazvo, kugadzirisa kuri nyore, kwakakodzera kuzadza shanduko, kuvandudza mashandiro ayo uye kuwedzera nzvimbo yekushandisa.

Chidzidzo ichi chakawana kuti kana chikamu chevhoriyamu chegraphene chiri 5%, kupisa kwekupisa kwemusanganiswa kwakakwira zvakapetwa ka4 pane iyo yepolymer yakajairwa, uye kana chikamu chevhoriyamu chegraphene chawedzerwa kusvika 40%, kupisa kwemafuta kweiyo composite. yakawedzera ka20..

2.4 Kuronga uye kugoverwa kwegraphene mumatrix
Izvo zvakaonekwa kuti inotungamira yakatwasuka stacking yegraphene inogona kuvandudza yayo yekupisa conductivity.
Mukuwedzera, kugoverwa kwezadza mumatrix kunokanganisawo kupisa kwekushisa kwekombiki.Kana iyo yekuzadza ichiparadzirwa zvakafanana mumatrix uye ichigadzira thermally conductive network chain, iyo yekupisa conductivity yemusanganiswa inovandudzwa zvakanyanya.

2.5 Interface kuramba uye interface yekubatanidza simba
Kazhinji, kuenderana kwemukati pakati peiyo inorganic filler particles uye organic resin matrix haina kunaka, uye zvimedu zvekuzadza zviri nyore kuunganidzwa mumatrix, zvichiita kuti zviome kugadzira kupararira kwakafanana.Uye zvakare, mutsauko wekunetsana kwepamusoro pakati peiyo inorganic filler particles uye matrix inoita kuti zviome kuti pamusoro pezvimedu zvekuzadza zvinyoroveswe neiyo resin matrix, zvichikonzera voids pakusangana pakati pezviviri, nekudaro zvichiwedzera kupindirana kwekupisa kwemafuta. chikamu chepolymer.

3. Mhedziso
High thermal conductivity mapurasitiki akazadzwa negraphene ane high thermal conductivity uye yakanaka kugadzikana kwemafuta, uye tarisiro yavo yebudiriro yakakura kwazvo.Kunze kwekupisa kwekupisa, graphene ine zvimwe zvakanakisa zvivakwa, senge simba rakanyanya, yakakwirira magetsi uye yekuona zvivakwa, uye inoshandiswa zvakanyanya munharembozha, aerospace, uye mabhatiri emagetsi matsva.

Hongwu Nano yanga ichitsvaga nekugadzira nanomaterials kubvira 2002, uye zvichibva paruzivo rwakakura uye tekinoroji yepamberi, yakanangana nemusika, Hongwu Nano inopa akasiyana siyana masevhisi akagadziridzwa masevhisi kuti ape vashandisi mhinduro dzakasiyana dzehunyanzvi kune mamwe anoshanda anoshanda maapplication.