本文選題：氧化石墨烯 + 環(huán)氧樹脂　； 參考：《湖南工業(yè)大學(xué)》2015年碩士論文

【摘要】：石墨烯獨(dú)特的結(jié)構(gòu)特點(diǎn)賦予其優(yōu)異的力學(xué)和電學(xué)性能,可廣泛的應(yīng)用在許多高科技領(lǐng)域中。由于石墨烯(GN)呈化學(xué)惰性,易產(chǎn)生團(tuán)聚,因此限制了其應(yīng)用,功能化被認(rèn)為是解決這一問題的有效途徑。本研究采用改進(jìn)Hummers氧化法制備氧化石墨,經(jīng)超聲剝離得到氧化石墨烯(GO),利用其表面的環(huán)氧基團(tuán),將雙酚A(BPA)接枝到GO表面,實(shí)現(xiàn)對(duì)GO的表面功能化;然后將其與環(huán)氧樹脂(EP)復(fù)合,制備GO/EP復(fù)合材料,研究改性前后GO對(duì)EP力學(xué)及熱穩(wěn)定性的影響。首先,采用傳統(tǒng)Hummers法和改進(jìn)后Hummers法制備GO,比較了兩種方法對(duì)GO結(jié)構(gòu)的影響,利用FT-IR、XRD和TG對(duì)兩種GO進(jìn)行表征,結(jié)果顯示:改進(jìn)法所制備的GO(用IGO表示)表面有更多的環(huán)氧基團(tuán),層間距更大,層數(shù)更低,且保存的石墨晶體結(jié)構(gòu)更完好。其次,在上述工作的基礎(chǔ)上,開展了在IGO表面接枝BPA(IGOBPA)的研究。為了防止IGO表面的酚羥基和羧基對(duì)后續(xù)工作的不利影響,我們先采用Na OH溶液對(duì)其進(jìn)行了封端處理,得到封端IGO(用SIGO表示),然后在堿性條件下進(jìn)行了BPA接枝GO的探索工作,FT-IR、XPS和SEM結(jié)果表明,BPA以共價(jià)鍵成功接枝到GO表面,XRD結(jié)果顯示IGO-BPA以松散的方式堆砌在一起;分散性實(shí)驗(yàn)結(jié)果表明,IGO-BPA比IGO和SIGO在丙酮中分散效果更好。最后,采用溶液共混法制備了IGO/EP、SIGO/EP和IGO-BPA/EP復(fù)合材料,考察改性前后和不同含量GO對(duì)復(fù)合材料力學(xué)性能、熱學(xué)性能的影響。結(jié)果表明:GO的加入提高了復(fù)合材料的力學(xué)性能、熱穩(wěn)定性,比較而言,以IGO-BPA的改性效果更佳,在其添加量為0.5wt%時(shí),復(fù)合材料的綜合力學(xué)性能最佳。
[Abstract]:Graphene has excellent mechanical and electrical properties due to its unique structural characteristics. It can be widely used in many fields of high technology. Because of its chemical inertia and agglomeration, GNN is limited in its application. Functionalization is considered to be an effective way to solve this problem. In this study, graphite oxide was prepared by modified Hummers oxidation method. Graphene oxide was obtained by ultrasonic stripping. Bisphenol A (BPA) was grafted onto go surface to realize surface functionalization of go, and then it was combined with epoxy resin (EP). The effects of go on the mechanical and thermal stability of GO/EP composites were studied before and after modification. Firstly, GO3 was prepared by the traditional Hummers method and the improved Hummers method. The effects of the two methods on go structure were compared. The two go were characterized by FT-IRX XRD and TG. The results showed that there were more epoxy groups on the surface of goo (expressed by IGO) prepared by the modified method. The interlayer spacing is larger, the number of layers is lower, and the preserved graphite crystal structure is better. Secondly, on the basis of the above work, the study of grafted BPA-IGO BPA on the surface of IGO was carried out. In order to prevent the adverse effects of phenolic hydroxyl and carboxyl groups on the surface of IGO, we first sealed them with NaOH solution. The investigation of BPA grafted go was carried out in alkaline condition. The results of FT-IRN XPS and SEM showed that IGO-BPA was successfully grafted to go surface by covalent bond. The results showed that IGO-BPA was stacked loosely. The results of dispersion experiments show that IGO-BPA is more effective than IGO and SIGO in dispersing in acetone. Finally, IGO / EPX SIGO / EP and IGO-BPA/EP composites were prepared by solution blending method. The effects of different contents of go on the mechanical and thermal properties of the composites were investigated. The results showed that the mechanical properties and thermal stability of the composites were improved with the addition of% go. The modification effect of IGO-BPA was better than that of the composites, and the comprehensive mechanical properties of the composites were the best when the content of IGO-BPA was 0.5 wt%.
【學(xué)位授予單位】：湖南工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB332

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 任小孟;王源升;何特;;石墨烯類材料對(duì)環(huán)氧樹脂的增韌及其機(jī)理研究[J];化工新型材料;2013年09期

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本文編號(hào)：1915268