本文選題：還原氧化石墨烯　切入點(diǎn)：智能高分子材料　出處：《遼寧大學(xué)》2017年碩士論文

【摘要】：智能響應(yīng)性石墨烯由于兼具智能高分子的智能響應(yīng)特性以及石墨烯優(yōu)良的物理性能而受到了廣泛關(guān)注。智能響應(yīng)性石墨烯納米復(fù)合材料的制備包括兩種常用的制備方法,即“共價法”和“非共價法”。與共價修飾法相比較,非共價修飾法具有對石墨烯共軛結(jié)構(gòu)、機(jī)械和電學(xué)性能影響小的優(yōu)點(diǎn),因而能夠很好的保持石墨烯原有的物理性質(zhì)。然而,對于那些沒有共軛結(jié)構(gòu)的智能高分子來言,這種修飾方法則要求在智能高分子結(jié)構(gòu)中植入具有大π鍵結(jié)構(gòu)的“連接”部位,從而使其能夠通過非共價作用有效的修飾在石墨烯表面。聚合離子液體是通過不飽和的離子液體單體聚合而獲得的聚合物。由于聚合離子液體含有大π鍵結(jié)構(gòu),已被證明可以通過非共價作用有效的修飾在碳基納米材料表面。此外,這種聚合物還具有獨(dú)特的離子交換性,可利用這種性質(zhì)通過控制陰離子的種類,賦予聚合物智能響應(yīng)性,使其實(shí)現(xiàn)親疏水性的轉(zhuǎn)換。更為重要的是,還可以通過離子交換作用向復(fù)合材料中引入具有功能性的陰離子,從而實(shí)現(xiàn)功能性材料的構(gòu)建。因此,如果將聚合離子液體作為“連接”部位引入,不僅可以實(shí)現(xiàn)無共軛結(jié)構(gòu)的智能高分子材料在石墨烯上表面的非共價修飾,而且還可以賦予復(fù)合物以多重智能響應(yīng)性和功能性�；谝陨系姆治�,本論文主要開展了以下兩部分工作:1.本文首先建立了一種具有普適性的智能石墨烯的合成方法,即首先利用原位聚合,通過自由基引發(fā)的方法合成了聚合物poly(NIPAm-co-ViEt ImBr),然后利用聚合物中聚合離子液體所含的大π鍵結(jié)構(gòu),通過非共價修飾作用進(jìn)一步合成了水溶性較好的智能性的石墨烯納米復(fù)合材料poly(NIPAm-co-ViEt Im Br)-rGO。實(shí)驗(yàn)過程中運(yùn)用TEM,AFM,UV-vis,XPS和FT-IR等方法對合成的復(fù)合物的形貌和結(jié)構(gòu)進(jìn)行了一系列的表征。并進(jìn)一步通過宏觀觀察及利用UV-vis表征對復(fù)合物的溫敏性和離子性進(jìn)行了監(jiān)控測試,實(shí)驗(yàn)結(jié)果表明,合成的復(fù)合物poly(NIPAm-co-Vi Et ImBr)-rGO具有良好的雙重智能響應(yīng)性,并且循環(huán)可逆,具有良好的開關(guān)效應(yīng)。此外,實(shí)驗(yàn)還利用復(fù)合物中聚合離子液體獨(dú)特的離子交換性制備了兩種功能性材料,并進(jìn)行了進(jìn)一步的表征和應(yīng)用探究。2.本文為進(jìn)一步考察合成方法的普適性,利用相同的方法合成了具有pH響應(yīng)性的復(fù)合物poly(AA-co-ViEt Im Br)-rGO。實(shí)驗(yàn)對復(fù)合物進(jìn)行了TEM,TGA,UV-vis,XPS和FT-IR等方法的表征,證明了已成功合成復(fù)合物poly(AA-co-ViEtImBr)-rGO,并對復(fù)合物的雙重智能響應(yīng)性進(jìn)行了監(jiān)控測試,實(shí)驗(yàn)結(jié)果表明復(fù)合物具有pH響應(yīng)性和溫度響應(yīng)性,且循環(huán)可逆,具有良好的開關(guān)效應(yīng)。
[Abstract]:Intelligent responsive graphene has attracted much attention because of its intelligent response characteristics of intelligent polymers and excellent physical properties of graphene. The preparation of intelligent responsive graphene nanocomposites includes two common preparation methods. That is, "covalent method" and "non-covalent method". Compared with covalent modification method, noncovalent modification method has the advantages of little influence on the conjugate structure, mechanical and electrical properties of graphene, so it can keep the original physical properties of graphene well. For intelligent polymers without conjugate structures, this modification requires the insertion of "join" sites with large 蟺 bond structures in smart polymer structures. So that it can be effectively modified on the surface of graphene by non-covalent action. Polymeric ionic liquids are obtained by polymerization of unsaturated ionic liquid monomers. Because polymeric ionic liquids contain large 蟺 bond structures, It has been proved that the polymer can be effectively modified on the surface of carbon based nanomaterials by non-covalent action. In addition, the polymer has unique ion exchange property, which can be used to give the polymer intelligent responsiveness by controlling the type of anions. More importantly, functional anions can also be introduced into the composite materials through ion exchange, so that functional materials can be constructed. If the polymeric ionic liquid is introduced as the "joint" site, the noncovalent modification of intelligent polymer materials with no conjugated structure on the surface of graphene can be realized. Based on the above analysis, this paper mainly carried out the following two parts of work: 1.In this paper, a universal synthesis method of intelligent graphene is established. That is to say, in situ polymerization, the polymer poly(NIPAm-co-ViEt imbrine was synthesized by the method of free radical initiation, and then the large 蟺 bond structure of polymerized ionic liquid was used. Poly(NIPAm-co-ViEt Im Br-rGO, a water-soluble and intelligent graphene nanocomposite material, was further synthesized by non-covalent modification. The morphology and structure of the synthesized composites were characterized by TEM AFM UV vis XPS and FT-IR during the experiment. Furthermore, the temperature sensitivity and ionic properties of the complexes were monitored and tested by macroscopical observation and UV-vis characterization. The experimental results show that the synthesized poly(NIPAm-co-Vi et ImBr)-rGO has good dual intelligent response, cyclic reversible and good switching effect. In addition, two kinds of functional materials were prepared by using the unique ionic exchangeability of polymeric ionic liquids in the complex, and further characterization and application were carried out. 2. In order to further investigate the universality of the synthesis methods, The pH responsive complex poly(AA-co-ViEt Im Br-rGO was synthesized by using the same method. The complex was characterized by TEMGA-TGA UV-vis-XPS and FT-IR methods. It was proved that the complex poly (AA-co-ViEtImBr-rGOA) was successfully synthesized, and the dual intelligent response of the complex was monitored and tested. The experimental results show that the complex has pH and temperature response, and the cycle is reversible and has a good switching effect.
【學(xué)位授予單位】：遼寧大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ127.11;TB33

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本文編號：1654077