【摘要】：自修復(fù)材料可以延長(zhǎng)材料的使用壽命,降低生產(chǎn)成本,提高材料安全性。近年來成為研究的熱點(diǎn),導(dǎo)電功能自修復(fù)材料是其中一個(gè)重要的領(lǐng)域。雖然在這個(gè)領(lǐng)域內(nèi)的研究工作已經(jīng)取得了非常多的成就,但是仍存在著一些問題,例如許多導(dǎo)電自修復(fù)材料的修復(fù)過程需要在外界刺激作用下才能完成,目前還沒有關(guān)于低于室溫的導(dǎo)電自修復(fù)材料的研究報(bào)道等等。本論文中,我們采用超分子聚合物作為樹脂基體,將其與碳納米材料(包括石墨烯和碳納米管)復(fù)合后制備出了兩種新型導(dǎo)電功能自修復(fù)材料,并對(duì)材料的結(jié)構(gòu)和性質(zhì)做了深入的表征。本論文主要分為以下兩個(gè)部分。1.石墨烯/超分子聚合物復(fù)合材料本工作中,我們首先利用檸檬酸與N',N',N",N"-四甲基-1,3-丙二胺之間的質(zhì)子交換作用獲得了超分子聚合物,并將還原后的氧化石墨烯(RGO)加入其中獲得了RGO/超分子聚合物復(fù)合材料。采用廣角X射線衍射、透射電子顯微鏡、傅立葉變化紅外光譜,差示掃描量熱儀,旋轉(zhuǎn)粘度儀和電阻計(jì)等分析了石墨烯與復(fù)合材料的結(jié)構(gòu),復(fù)合材料的熱性能、粘度-溫度特性、導(dǎo)電性能和自修復(fù)性能。X射線衍射分析結(jié)果表明,所用石墨烯具有微米級(jí)的大尺寸；紅外光譜分析表明,RGO的加入削弱了檸檬酸與四甲基丙二胺之間的靜電相互作用；熱分析結(jié)果表明,RGO/超分子聚合物復(fù)合材料在升降溫過程中的熱流減��；粘度測(cè)試結(jié)果表明,RGO使復(fù)合材料的粘度大幅下降。這些結(jié)果說明,由于RGO的大尺寸,在RGO與檸檬酸和四甲基丙二胺原位形成超分子聚合物復(fù)合材料過程中,RGO對(duì)部分檸檬酸與四甲基丙二胺起到了隔離作用,在一定程度上破壞了復(fù)合材料中超分子聚合物擬網(wǎng)狀結(jié)構(gòu)的完整性。由于RGO的高導(dǎo)電性以及RGO復(fù)合材料的高流動(dòng)性,復(fù)合材料的電導(dǎo)率大幅提升了約3個(gè)數(shù)量級(jí),且導(dǎo)電性隨溫度的躍遷變化更加顯著。相比于原聚合物,復(fù)合材料的自修復(fù)效率更高。2.低溫導(dǎo)電自修復(fù)材料本工作中,我們以檸檬酸和四甲基丙二胺為原料制備了超分子聚合物,并在其中加入了適量的碳納米管,隨即得到了能夠在低于室溫條件下完成自修復(fù)的導(dǎo)電復(fù)合材料。研究結(jié)果表明,這種超分子聚合物能夠在-24℃條件下,4小時(shí)內(nèi)完成自修復(fù)；在加入碳納米管后,超分子聚合物基體的自修復(fù)性能并未受到很大影響,所得導(dǎo)電自修復(fù)材料同樣能夠在4小時(shí)內(nèi)完成自修復(fù)。這種超分子聚合物及低溫導(dǎo)電自修復(fù)材料在修復(fù)后,可以承受約1×104Pa的應(yīng)力而不發(fā)生斷裂。即便是斷口不完全對(duì)齊的情況下,這種超分子聚合物及低溫導(dǎo)電自修復(fù)材料也能夠很好地在-24℃完成修復(fù),并承受相同的應(yīng)力作用。在結(jié)構(gòu)修復(fù)的同時(shí),材料的導(dǎo)電性也得以很好的修復(fù)。對(duì)這種超分子聚合物及導(dǎo)電修復(fù)材料的低溫自修復(fù)機(jī)理研究表明,羧基與胺基間的離子鍵交換是主要原因。由于超分子聚合物低溫導(dǎo)電修復(fù)材料的粘彈性和可塑性,可以在室溫下將其制備成不同形狀的導(dǎo)體,擴(kuò)展了它的使用范圍。
[Abstract]:Self repairing materials can prolong the service life of materials, reduce production costs and improve material safety. In recent years, it has become a hot spot of research. Self repairing materials are one of the most important fields. Although many research work has been made in this field, there are still some problems, such as many guides. In this paper, we use supramolecular polymer as a resin matrix to make two of carbon nanomaterials (including graphene and carbon nanotubes). The structure and properties of the new conductive functional self repairing materials are deeply characterized. This paper is mainly divided into two parts of the.1. graphene / supramolecular polymer composites. We first obtained the supramolecular polymerization using the proton exchange between citric acid and N', N', N "N" - four methyl -1,3- C two amines. RGO/ supermolecule polymer composite was obtained by adding the reduced graphite oxide (RGO). Wide angle X ray diffraction, transmission electron microscope, Fu Liye change infrared spectrum, differential scanning calorimeter, rotary viscosimeter and resistor meter were used to analyze the structure of the alkene and composite materials and the thermal properties of the composites. The.X ray diffraction analysis of the viscosity temperature characteristics, electrical conductivity and self repair performance showed that the graphene was of micrometer size, and the infrared spectrum analysis showed that the addition of RGO weakened the electrostatic interaction between citric acid and four methylpropyl two amine, and the results of thermal analysis showed that the RGO/ supramolecular polymer composites were rising and down. The heat flux in the temperature process decreased, and the viscosity test results showed that the viscosity of the composite decreased significantly by RGO. These results showed that, due to the large size of RGO, in the process of in situ formation of the supermolecular polymer composite with citric acid and four methylpropyl two amine in the process of RGO, some of the citric acid and four methylpropyl two amine were isolated. The integrity of the pseudo reticular structure of the supermolecular polymer in the composite is destroyed to a certain extent. The conductivity of the composite is increased by about 3 orders of magnitude due to the high conductivity of the RGO and the high mobility of the RGO composite, and the conductivity of the composites is more significant with the transition of the temperature. In the work of higher.2. low temperature conductive self repairing materials, we prepared the supramolecular polymer with citric acid and four methylamine two amine as raw material, and added a proper amount of carbon nanotubes in it, then obtained the conductive composite material that could be repaired at a lower temperature under the condition of room temperature. The results showed that the supramolecular polymer can be used. Under the condition of -24 C, self repair is completed within 4 hours. After adding carbon nanotubes, the self repair performance of the supramolecular polymer matrix has not been greatly affected. The self repairing material can also be self repairing in 4 hours. This supermolecular polymer and low temperature conductive self repair material can bear about 1 x 104P after repair. The stress of the A does not break. Even if the fracture is not fully aligned, the supramolecular polymer and the low temperature conductive self repair material can also be well repaired at -24 C and bear the same stress effect. The conductivity of the material is well repaired while the structure is repaired. The study on the self repair mechanism of the electric repair materials at low temperature shows that the ion bond exchange between the carboxyl group and the amine group is the main reason. Because of the viscoelasticity and plasticity of the supramolecular polymer, it can be prepared at room temperature into a conductor with different shapes, and the range of its use is extended.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB33

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 呂亞非;氫鍵型超分子聚合物的合成、結(jié)構(gòu)與應(yīng)用[J];高分子通報(bào);2005年03期

2 朱亮亮;滕啟文;吳師;徐凌佳;陳小朋;;氫鍵復(fù)合物自組裝性質(zhì)的研究[J];化學(xué)進(jìn)展;2006年06期

3 白炳蓮,李敏;基于氫鍵的自組裝超分子體系[J];化學(xué)通報(bào);2004年02期

，

本文編號(hào)：2124511