本文選題：石墨烯分散液 + 聚吡咯��； 參考：《上海應(yīng)用技術(shù)大學(xué)》2016年碩士論文

【摘要】：石墨烯是聚合物納米復(fù)合材料的重要的改性材料之一,因其具有優(yōu)異的化學(xué)穩(wěn)定性、機(jī)械性能、良好的片層阻隔性能等。在防腐蝕領(lǐng)域,石墨烯作為優(yōu)異的防腐蝕涂層材料,對腐蝕因子具有很好的阻隔效應(yīng)。目前,使用化學(xué)沉積法制備的石墨烯涂層,研究證明具有對空氣,氧負(fù)離子,氯離子等腐蝕因子的阻隔效應(yīng)。石墨烯片層之間具有π-π相互作用而容易發(fā)生團(tuán)聚,這對石墨烯防腐蝕的應(yīng)用受限。本論文通過非共價(jià)功能化方法,制備了石墨烯分散體,相比于化學(xué)改性,具有反應(yīng)條件溫和、反應(yīng)過程可控以及高效環(huán)保等優(yōu)點(diǎn)。本文考察了使用聚合物改性的石墨烯、活性稀釋劑分散的石墨烯對環(huán)氧樹脂涂層性能的影響。由于聚吡咯和石墨烯各自之間具有強(qiáng)的分子間相互作用,使得單獨(dú)使用時(shí)容易發(fā)生團(tuán)聚現(xiàn)象。但是當(dāng)在聚吡咯聚合時(shí)加入1%-3%的石墨烯時(shí),聚吡咯的團(tuán)聚球形形貌變成扁平狀的聚吡咯/石墨烯復(fù)合材料。制備的聚吡咯/石墨烯復(fù)合材料對環(huán)氧樹脂涂層的防腐蝕性能提高了很多,大的比表面積能夠有效的增加腐蝕因子在涂層中的運(yùn)動路徑。隨著石墨烯含量的增加,復(fù)合材料的流變性能和介電性能越來越好。當(dāng)體系為聚吡咯(97)/石墨烯(3)時(shí),復(fù)合材料的熱固化峰發(fā)生了右移,從100℃增加到110℃,導(dǎo)電聚吡咯復(fù)合材料的引入,三元復(fù)合材料的體積電阻率降低了很多。產(chǎn)生這種影響,是因?yàn)槭┡c聚吡咯之間相互促進(jìn)分散,使得復(fù)合材料的性能得到改善,進(jìn)而增強(qiáng)了對腐蝕因子的阻隔性能。本文還制備了活性稀釋劑分散的石墨烯基環(huán)氧樹脂復(fù)合材料,并考察了其在防腐蝕領(lǐng)域的應(yīng)用。通過制備不同質(zhì)量分?jǐn)?shù)的石墨烯分散液(環(huán)氧環(huán)戊烷和1,2環(huán)氧己烷),使用掃描電鏡和透射電鏡對石墨烯基環(huán)氧樹脂復(fù)合材料的形貌進(jìn)行了表征,表明特殊結(jié)構(gòu)的活性稀釋劑的使用,能夠獲取分散性好的石墨烯分散體�；钚韵♂寗┑氖褂�,不僅降低了環(huán)氧樹脂的粘度,還有效的防止了石墨烯的團(tuán)聚。實(shí)驗(yàn)結(jié)果證明,制備的石墨烯基環(huán)氧樹脂復(fù)合材料具有很好的導(dǎo)熱性能和防腐蝕性能。
[Abstract]:Graphene is one of the most important modified polymer nanocomposites because of its excellent chemical stability, mechanical properties and good lamellar barrier properties. Graphene, as an excellent anticorrosive coating material, has a good barrier effect on corrosion factor in corrosion protection field. At present, the graphene coating prepared by chemical deposition method has been proved to have the barrier effect on the corrosion factors such as air, oxygen negative ion, chloride ion and so on. There is 蟺-蟺 interaction between the graphene lamellae and it is easy to agglomerate, which is limited in the application of graphene corrosion protection. In this paper, graphene dispersion was prepared by non-covalent functionalization. Compared with chemical modification, graphene dispersion has the advantages of mild reaction conditions, controllable reaction process and high efficiency and environmental protection. The effects of polymer modified graphene and active diluent dispersed graphene on the properties of epoxy resin coating were investigated. Due to the strong intermolecular interaction between polypyrrole and graphene, agglomeration occurs easily when used alone. However, when 1-3% graphene was added to polypyrrole polymerization, the aggregation spherical morphology of polypyrrole turned into flattened polypyrrole / graphene composite. The anticorrosion performance of the prepared polypyrrole / graphene composite has been greatly improved. Large specific surface area can effectively increase the movement path of corrosion factor in the coating. With the increase of graphene content, the rheological and dielectric properties of the composites become better and better. When the system was polypyrrole 97 / graphene 3), the thermal curing peak of the composites shifted to the right, increasing from 100 鈩，

本文編號：2003265