Amapulasitiki aphezulu ashisayo abonisa amathalenta angavamile kuma-inductors e-transformer, ukuchithwa kokushisa kwengxenye ye-elekthronikhi, izintambo ezikhethekile, ukupakishwa kwe-elekthronikhi, i-thermal potting kanye nezinye izinkambu zokucubungula ukusebenza kahle kwazo, intengo ephansi kanye nokuhamba kahle kwe-thermal.Amapulasitiki aphezulu we-thermal conductivity ane-graphene njenge-filler angahlangabezana nezidingo zokuminyana okuphezulu kanye nokuthuthukiswa komhlangano wokuhlanganiswa okuphezulu embonini yokuphatha okushisayo kanye ne-electronics.

Amapulasitiki ajwayelekile ashisayo agcwala ikakhulukazi insimbi eqhuba ukushisa okuphezulu noma izinhlayiya ze-inorganic filler ukugcwalisa ngokulinganayo izinto ze-polymer matrix.Lapho inani lokugcwalisa lifinyelela ezingeni elithile, isigcwalisi sakha i-morphology efana neketanga kanye nenethiwekhi ohlelweni, okungukuthi, iketango lenethiwekhi eliqhuba ukushisa.Uma inkombandlela yokuma kulawa maketango anezikhala ezibamba ukushisa ihambisana nesiqondiso sokugeleza kokushisa, ukuqhutshwa kokushisa kwesistimu kuba ngcono kakhulu.

High thermal conductive plastic ngei-carbon nanomaterial graphenenjengoba i-filler ingahlangabezana nezidingo zokuminyana okuphezulu kanye nokuthuthukiswa komhlangano wokuhlanganiswa okuphezulu ekuphathweni kwe-thermal kanye nemboni ye-electronics.Isibonelo, i-thermal conductivity ye-polyamide 6 (PA6) ehlanzekile yi-0.338 W / (m · K), lapho igcwele i-alumina engu-50%, ukuqhutshwa kokushisa kwe-composite izikhathi ezingu-1.57 kune-PA6 ehlanzekile;lapho wengeza u-25% we-zinc oxide eguquliwe, ukuqhutshwa kokushisa kwenhlanganisela kuphindwe kathathu kune-PA6 ehlanzekile.Lapho i-graphene nanosheet engu-20% yengezwa, ukuqhutshwa kokushisa kwenhlanganisela kufinyelela ku-4.11 W/(m•K), okukhuphuka izikhathi ezingaphezu kwezingu-15 kune-PA6 ehlanzekile, ebonisa amandla amakhulu e-graphene emkhakheni wokuphatha okushisayo.

1. Ukulungiselela kanye ne-thermal conductivity ye-graphene/polymer composite

I-thermal conductivity ye-graphene/polymer composite ayinakuhlukaniswa nezimo zokucubungula inqubo yokulungiselela.Izindlela ezihlukene zokulungiselela zenza umehluko ekuhlakazweni, isenzo sokuhlangana kanye nesakhiwo sendawo yokugcwalisa ku-matrix, futhi lezi zici zinquma ukuqina, amandla, ukuqina kanye ne-ductility yenhlanganisela.Mayelana nocwaningo lwamanje, ngezinhlanganisela ze-graphene/polymer, izinga lokuhlakazwa kwe-graphene kanye nezinga lokucwecwa kwamashidi e-graphene kungalawulwa ngokulawula i-shear, izinga lokushisa kanye nezinyibilikisi ze-polar.

2. Izici ezithinta ukusebenza kwe-graphene zigcwalise amapulasitiki aphezulu we-thermal conductivity

2.1 Inani elingeziwe leGraphene

Epulasitiki ephezulu ye-thermal conductivity egcwele i-graphene, njengoba inani le-graphene landa, iketanga lenethiwekhi ye-thermal conductive liyakhiwa kancane kancane ohlelweni, okuthuthukisa kakhulu ukuqhutshwa kokushisa kwezinto ezihlanganisiwe.

Ngokutadisha ukuqhutshwa kokushisa kwe-epoxy resin (EP) -based graphene composites, kutholakala ukuthi isilinganiso sokugcwalisa i-graphene (cishe izendlalelo ezi-4) singakhuphula ukuqhutshwa kokushisa kwe-EP cishe izikhathi ezingu-30 kuya ku-6.44.I-W/(m•K), kuyilapho izigcwalisi zendabuko ezishisayo zidinga u-70% (ingxenye yevolumu) yesigcwalisi ukuze kuzuzwe lo mphumela.

2.2 Inani lezingqimba zeGraphene
Ku-graphene yama-multilayers, ucwaningo lwezendlalelo ezingu-1-10 ze-graphene luthole ukuthi lapho inani lezendlalelo ze-graphene linyuswa lisuka ku-2 laya ku-4, ukuqhutshwa kokushisa kwehle kusuka ku-2 800 W/(m•K) kuya ku-1300 W/(m•K) ).Lokhu kulandela ukuthi ukuhanjiswa okushisayo kwe-graphene kuthanda ukwehla ngokunyuka kwenani lezendlalelo.

Lokhu kungenxa yokuthi i-graphene ye-multilayer izohlangana ngokuhamba kwesikhathi, okuzokwenza ukuthi ukuqhutshwa kokushisa kwehle.Ngesikhathi esifanayo, ukukhubazeka kwe-graphene kanye nokuphazamiseka konqenqemeni kuzonciphisa ukuqhutshwa kokushisa kwe-graphene.

2.3 Izinhlobo ze-substrate
Izingxenye eziyinhloko zamapulasitiki aphezulu we-thermal conductivity zihlanganisa izinto ze-matrix kanye nezigcwalisi.I-Graphene iyisinqumo esingcono kakhulu se-fillers ngenxa ye-conductivity yayo enhle kakhulu ye-thermal.Ukwakheka okuhlukile kwe-matrix kuthinta ukuqhutshwa kokushisa.I-Polyamide (PA) inezici ezinhle zemishini, ukumelana nokushisa, ukumelana nokugqoka, i-coefficient ephansi yokungqubuzana, ukuncipha okuthile komlilo, ukucubungula okulula, okulungele ukugcwalisa ukuguqulwa, ukuthuthukisa ukusebenza kwayo nokwandisa insimu yesicelo.

Ucwaningo luthole ukuthi lapho ingxenye yevolumu ye-graphene ingu-5%, ukuqhutshwa kokushisa kwenhlanganisela kuphakeme ngokuphindwe ka-4 kune-polymer evamile, futhi lapho ingxenye yevolumu ye-graphene inyuswa ibe ngu-40%, ukuqhutshwa kokushisa kwenhlanganisela. ikhuphuka izikhathi ezingu-20..

2.4 Ukuhlelwa nokusatshalaliswa kwe-graphene ku-matrix
Kutholwe ukuthi ukunqwabelana okuqondile okuqondile kwe-graphene kungathuthukisa ukusebenza kwayo okushisayo.
Ngaphezu kwalokho, ukusatshalaliswa kokugcwalisa ku-matrix nakho kuthinta ukuqhutshwa kokushisa kwe-composite.Lapho i-filler ihlakazeka ngokulinganayo ku-matrix futhi yenza iketanga lenethiwekhi ye-thermal conductive, ukuqhutshwa kwe-thermal ye-composite kuthuthukiswa kakhulu.

2.5 Ukumelana nesixhumi esibonakalayo namandla okuhlanganisa
Ngokuvamile, ukuhambisana kobuso phakathi kwezinhlayiya ze-inorganic filler kanye ne-organic resin matrix kubi, futhi izinhlayiya zokugcwalisa zihlanganiswa kalula ku-matrix, okwenza kube nzima ukwenza ukuhlakazeka okufanayo.Ngaphezu kwalokho, umehluko wokungezwani kwendawo phakathi kwezinhlayiya zesigcwalisi esingaphili kanye ne-matrix kwenza kube nzima ukuthi izinhlayiya zokugcwalisa zimanziswe yi-matrix ye-resin, okuholela ekutheni kube ne-voids kusixhumi esibonakalayo phakathi kwakho kokubili, ngaleyo ndlela kwandise ukumelana nokushisa kobuso obuhlangene. inhlanganisela ye-polymer.

3. Isiphetho
Amapulasitiki aphezulu ashisayo agcwele i-graphene ane-conductivity ephezulu yokushisa kanye nokuzinza okuhle kwe-thermal, futhi amathemba awo okuthuthukiswa abanzi kakhulu.Ngaphandle kwe-thermal conductivity, i-graphene inezinye izinto ezinhle kakhulu, njengamandla aphezulu, izakhiwo eziphakeme zikagesi kanye ne-optical, futhi isetshenziswa kakhulu kumadivayisi eselula, i-aerospace, namabhethri anamandla amasha.

I-Hongwu Nano ibicwaninga futhi ithuthukisa ama-nanomaterials kusukela ngo-2002, futhi isuselwa kulwazi olukhulile kanye nobuchwepheshe obuthuthukile, obugxile emakethe, i-Hongwu Nano inikeza izinsiza ezehlukene ezenziwe ngokwezifiso ukuze inikeze abasebenzisi izisombululo zobungcweti ezihlukene zezinhlelo zokusebenza ezisebenza ngempumelelo.