本文選題：熱電材料 + 聚吡咯��； 參考：《青島科技大學(xué)》2015年碩士論文

【摘要】：與無機(jī)熱電材料相比,有機(jī)熱電材料具有柔性、可加工性、低導(dǎo)熱和低成本等優(yōu)點(diǎn),但目前文獻(xiàn)報(bào)道其性能仍明顯低于無機(jī)熱電材料。石墨烯是一種有著超高電導(dǎo)率和Seebeck系數(shù)的材料,然而由于其熱導(dǎo)率太高,故不適合單獨(dú)作為熱電材料應(yīng)用。在此背景下,本文采用聚吡咯和石墨烯為研究體系,探索將二者復(fù)合,得到一種具有優(yōu)異熱電性能的石墨烯-聚吡咯復(fù)合材料,并對(duì)其制備方法、結(jié)構(gòu)與形貌表征、熱電性能以及結(jié)構(gòu)-功能性關(guān)系機(jī)理等進(jìn)行研究。主要內(nèi)容和研究結(jié)果如下。采用化學(xué)氧化聚合的方法,通過實(shí)驗(yàn)條件的系統(tǒng)研究和優(yōu)化,制備了粉末狀聚吡咯材料；利用多種現(xiàn)代分析技術(shù)對(duì)產(chǎn)物的形貌、結(jié)構(gòu)和熱電性能進(jìn)行了系列表征與測(cè)試。利用模板導(dǎo)向的原位聚合方法,采用與制備聚吡咯類似的聚合條件,以石墨烯納米片層為模板,通過單體吸附并在其表面原位聚合制備了石墨烯表面含有聚吡咯包覆層的復(fù)合材料。經(jīng)SEM和TEM觀察證實(shí),復(fù)合材料中石墨烯片層表面的包覆層厚度均一、可控。更重要的是,與純聚吡咯相比,引入石墨烯后制備的復(fù)合材料熱電性能有大幅度提升,石墨烯與吡咯質(zhì)量比是2：1時(shí),復(fù)合材料的功率因子是純聚吡咯的84倍。另外,本文重點(diǎn)研究了分散劑SDS對(duì)于復(fù)合材料制備和熱電性能的影響。結(jié)果表明,SDS明顯促進(jìn)了石墨烯在水中的分散,顯著提高了吡咯在水中的聚合速率,并大幅提高了聚毗咯的電導(dǎo)率。
[Abstract]:Compared with inorganic thermoelectric materials, organic thermoelectric materials have the advantages of flexibility, processability, low thermal conductivity and low cost. Graphene is a kind of material with high conductivity and Seebeck coefficient. However, because of its high thermal conductivity, graphene is not suitable to be used as a thermoelectric material alone. Under this background, a kind of graphene polypyrrole composite with excellent thermoelectric properties was obtained by using polypyrrole and graphene as research systems, and the preparation method, structure and morphology of the composites were characterized. The thermoelectric properties and the mechanism of structure-functional relationship were studied. The main contents and results are as follows. The powder polypyrrole materials were prepared by chemical oxidation polymerization, and the morphology, structure and thermoelectric properties of the products were characterized and tested by a variety of modern analytical techniques. Using template oriented in situ polymerization, using the polymerization conditions similar to the preparation of polypyrrole, using graphene nanocrystalline as template, The composites containing polypyrrole coating on graphene surface were prepared by monomer adsorption and in situ polymerization. The results of SEM and TEM show that the coating thickness of graphene lamellar is uniform and controllable. More importantly, compared with pure polypyrrole, the thermoelectric properties of the composites prepared by the introduction of graphene are greatly improved. When the mass ratio of graphene to pyrrole is 2:1, the power factor of the composite is 84 times that of pure polypyrrole. In addition, the influence of dispersant SDS on the preparation and thermoelectric properties of composites was studied. The results show that SDS can obviously promote the dispersion of graphene in water, increase the polymerization rate of pyrrole in water, and increase the conductivity of Polymeric pyrrole.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB332

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