發(fā)布時(shí)間：2018-02-28 16:21

  本文關(guān)鍵詞： 石墨烯纖維 超級(jí)電容器 CVD石墨烯 RAFT聚合 溫敏型智能開關(guān)　出處：《青島大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：石墨烯作為一種新型的二維材料,是由單層碳原子通過sp~2雜化形成的共價(jià)鍵組成的二維層狀結(jié)構(gòu)。由于其優(yōu)異的電學(xué)性能,光學(xué)性能,力學(xué)性能和機(jī)械性能等引起了各國(guó)科研人員的廣泛關(guān)注和研究。本論文我們通過以柔性的天然蠶絲作為模板,利用簡(jiǎn)單直接噴涂的方法,將氧化石墨烯溶液噴涂到蠶絲上,然后巧妙地利用了氫碘酸的還原性和腐蝕性,在還原氧化石墨烯纖維的過程中,同時(shí)腐蝕掉了石墨烯纖維內(nèi)部的蠶絲模板,成功制備了柔性的空心石墨烯纖維。然后我們利用這種柔性的空心石墨烯纖維作為電極制備了對(duì)稱的全固態(tài)柔性石墨烯纖維電容器。這種全固態(tài)柔性石墨烯纖維電容器的具有優(yōu)異的電容性能,加之考慮到這種方法制備石墨烯纖維簡(jiǎn)單高效,有利于以后的大規(guī)模生產(chǎn),而且石墨烯纖維的長(zhǎng)度直徑等可以隨意調(diào)控。因此這種方法制備空心石墨烯纖維將在未來的柔性可穿戴電子設(shè)備領(lǐng)域擁有巨大的應(yīng)用前景。然后,我們利用化學(xué)氣相沉積法(CVD法)制備了二維的石墨烯薄膜,通過RAFT聚合的方法制備了一端含有芘官能團(tuán)的溫敏性高分子聚N-異丙基丙烯酰胺(PNIPAAm),同時(shí)利用芘官能團(tuán)與CVD石墨烯之間的π-π堆疊作用,制備了CVD石墨烯/PNIPAAm復(fù)合薄膜,并且成功驗(yàn)證了其在不同溫度下的形變行為。當(dāng)溫度高于32℃時(shí)CVD石墨烯/PNIPAAm復(fù)合薄膜發(fā)生彎曲形變,當(dāng)溫度低于32℃時(shí),CVD石墨烯/PNIPAAm復(fù)合薄膜形狀幾乎恢復(fù)了初始狀態(tài)。為了充分體現(xiàn)二維石墨烯薄膜的柔性和導(dǎo)電性優(yōu)勢(shì),同時(shí)利用溫敏性高分子的溫敏特性。CVD石墨烯/PNIPAAm復(fù)合薄膜成功制備了溫敏性的智能開關(guān)來控制LED燈的開關(guān)。不僅如此,這種通過π-π堆疊作用制備石墨烯復(fù)合材料的方法,還可以推廣到制備其它基于石墨烯基智能材料的響應(yīng)致動(dòng)器和傳感器領(lǐng)域。
[Abstract]:Graphene, as a new two-dimensional material, is a two-dimensional layered structure composed of covalent bonds formed by monolayer carbon atoms through sp~2 hybrids. The mechanical properties and mechanical properties have attracted the attention and research of researchers all over the world. In this paper, we spray graphene oxide solution onto silk by using flexible natural silk as template and simple direct spraying method. Then ingeniously utilizing the reductive and corrosive properties of hydroiodate, in the process of reducing graphene fiber, the silk template inside the graphene fiber is corroded. The flexible hollow graphene fiber was successfully prepared, and then we prepared a symmetrical all solid flexible graphene fiber capacitor using this flexible hollow graphene fiber as the electrode. Capacitors have excellent capacitive properties, In addition, considering that this method is simple and efficient in the preparation of graphene fibers, it is beneficial to large-scale production in the future. And the length and diameter of graphene fiber can be adjusted at will. Therefore, this method will have a great application prospect in the field of flexible wearable electronic devices in the future. We prepared two-dimensional graphene thin films by chemical vapor deposition (CVD). The thermosensitive polymeric polyN- isopropylacrylamide (PNIPAAmN) with pyrene functional group at one end was prepared by RAFT polymerization, and the CVD graphene / PNIPAAm composite film was prepared by 蟺-蟺 stacking between pyrene functional group and CVD graphene. The deformation behavior of CVD graphene / PNIPAAm composite films at different temperatures is verified successfully. When the temperature is higher than 32 鈩，

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