Manyan robobi na zafin zafi suna nuna hazaka na ban mamaki a cikin inductor na wuta, ɓarkewar kayan lantarki, igiyoyi na musamman, marufi na lantarki, tukunyar zafi da sauran filayen don kyakkyawan aikinsu, ƙarancin farashi da kyakkyawan yanayin zafi.High thermal conductivity robobi tare da graphene kamar yadda filler iya saduwa da bukatun na babban yawa da kuma high hadewa taro ci gaban a thermal management da Electronics masana'antu.

robobi masu ɗaukar zafi na al'ada an cika su da babban ƙarfe mai ɗaukar zafi ko ɓangarorin filler don cika kayan matrix polymer daidai.Lokacin da adadin filler ya kai wani matsayi, mai filler yana samar da nau'i-nau'i-kamar sarkar da kuma tsarin tsarin tsarin sadarwa, wato, sarkar cibiyar sadarwa ta thermally.Lokacin da alkiblar waɗannan sarƙoƙin raga masu ɗaukar zafi ya yi daidai da alkiblar zafin zafi, ƙarfin wutar lantarki na tsarin yana inganta sosai.

Babban thermal conductive robobi tare dacarbon nanomaterial graphenekamar yadda filler zai iya saduwa da buƙatun babban yawa da haɓaka haɓaka haɗin kai a cikin sarrafa thermal da masana'antar lantarki.Misali, thermal conductivity na tsarki polyamide 6 (PA6) ne 0.338 W / (m · K), a lokacin da cika da 50% alumina, thermal conductivity na composite ne 1.57 sau na tsarki PA6;lokacin da aka ƙara 25% na zinc oxide da aka gyara, yanayin zafin na'urar ya ninka sau uku fiye da na PA6 mai tsabta.Lokacin da aka ƙara nanosheet na 20% na graphene, ƙaddamarwar thermal na haɗakarwa ya kai 4.11 W / (m•K), wanda ya karu da fiye da sau 15 fiye da tsarkakakken PA6, wanda ke nuna babban yuwuwar graphene a fagen sarrafa thermal.

1. Shiri da thermal conductivity na graphene / polymer composites

Ƙarfafawar thermal na graphene / polymer composites ba shi da bambanci da yanayin aiki a cikin tsarin shirye-shiryen.Hanyoyi daban-daban na shirye-shiryen suna yin bambanci a cikin tarwatsawa, aikin tsaka-tsaki da tsarin sararin samaniya na filler a cikin matrix, kuma waɗannan abubuwan sun ƙayyade ƙima, ƙarfi, ƙarfi da ductility na haɗakarwa.Dangane da bincike na yanzu, ga graphene/polymer composites, matakin watsawa na graphene da matakin peeling na zanen graphene ana iya sarrafa su ta hanyar sarrafa ƙarfi, zafin jiki da kaushi na polar.

2. Abubuwan da suka shafi aikin graphene sun cika manyan robobi na thermal conductivity

2.1 Ƙara adadin Graphene

A cikin babban ma'aunin zafi mai zafi da ke cike da graphene, yayin da adadin graphene ya karu, ana samun sarkar cibiyar sadarwa ta thermal a hankali a cikin tsarin, wanda ke inganta haɓakar yanayin zafi na kayan haɗin gwiwa.

Ta hanyar nazarin yanayin zafi na resin epoxy resin (EP) - tushen graphene composites, an gano cewa cikar rabon graphene (kimanin yadudduka 4) na iya haɓaka haɓakar thermal na EP da kusan sau 30 zuwa 6.44.W/(m•K), yayin da na'urorin sarrafa zafin jiki na gargajiya suna buƙatar 70% (ƙarashin juzu'i) na filler don cimma wannan tasirin.

2.2 Yawan yadudduka na Graphene
Don multilayers graphene, binciken a kan 1-10 yadudduka na graphene ya gano cewa lokacin da aka ƙara yawan adadin graphene daga 2 zuwa 4, ƙaddamarwar thermal ya ragu daga 2 800 W / (m•K) zuwa 1300 W / (m•K). ).Ya biyo bayan ƙaddamarwar thermal na graphene yana ƙoƙarin ragewa tare da karuwar adadin yadudduka.

Wannan shi ne saboda multilayer graphene zai haɓaka tare da lokaci, wanda zai haifar da ƙaddamarwar thermal don ragewa.A lokaci guda, lahani a cikin graphene da rashin daidaituwa na gefen zai rage yawan zafin jiki na graphene.

2.3 Nau'in substrate
Babban abubuwan da ke tattare da manyan robobi na thermal conductivity sun hada da kayan matrix da filaye.Graphene shine mafi kyawun zaɓi don masu cikawa saboda kyakkyawan yanayin yanayin zafi.Polyamide (PA) yana da kyawawan kayan aikin injiniya, juriya na zafi, juriya na juriya, ƙarancin juzu'i, wasu ƙarancin wuta, aiki mai sauƙi, dacewa da gyare-gyaren cikawa, don haɓaka aikin sa da faɗaɗa filin aikace-aikacen.

Binciken ya gano cewa lokacin da juzu'in juzu'in graphene ya kasance 5%, haɓakar thermal conductivity na composite shine sau 4 sama da na polymer na yau da kullun, kuma lokacin da ƙaramin juzu'in graphene ya ƙaru zuwa 40%, haɓakar thermal conductivity na abubuwan haɗin. yana ƙaruwa sau 20..

2.4 Shirye-shiryen da rarraba graphene a cikin matrix
An gano cewa tari na tsaye na graphene na iya inganta yanayin zafinsa.
Bugu da ƙari, rarraba filler a cikin matrix kuma yana rinjayar tasirin thermal na haɗakarwa.Lokacin da filler ɗin ya tarwatse iri ɗaya a cikin matrix kuma ya samar da sarkar cibiyar sadarwa ta thermal conductive, thermal conductivity na composite yana inganta sosai.

2.5 juriya na mu'amala da ƙarfin haɗin kai
Gabaɗaya, daidaituwar tsaka-tsakin tsaka-tsakin tsaka-tsakin inorganic filler barbashi da matrix resin Organic ba shi da kyau, kuma abubuwan filler suna da sauƙin haɓakawa a cikin matrix, yana sa ya zama da wahala a samar da rarrabuwa iri ɗaya.Bugu da ƙari, bambance-bambance a cikin tashin hankali na saman tsakanin ƙwayoyin filler na inorganic da matrix ya sa ya zama da wahala ga farfajiyar filler ɗin da za a jika ta hanyar resin matrix, wanda ya haifar da ɓarna a mahaɗin tsakanin su biyu, don haka yana ƙaruwa da juriya na thermal interfacial. na polymer composite.

3. Kammalawa
Manyan robobi masu zafi da aka cika da graphene suna da haɓakar zafin zafi da kwanciyar hankali mai kyau, kuma haɓakar haɓakarsu suna da faɗi sosai.Bayan da thermal conductivity, graphene yana da wasu kyawawan kaddarorin, kamar babban ƙarfi, high lantarki da na gani kaddarorin, kuma ana amfani da ko'ina a cikin mobile na'urorin, aerospace, da kuma sabon makamashi batura.

Hongwu Nano yana bincike da haɓaka nanomaterials tun 2002, kuma bisa ga balagagge gwaninta da ci-gaba da fasaha, kasuwa-daidaitacce, Hongwu Nano yana ba da ɗimbin ƙwararrun ayyuka na musamman don samar da masu amfani da daban-daban na sana'a mafita ga mafi m m aikace-aikace.