Pickering乳液法制备聚苯胺-石墨烯空心微球

发布时间：2018-02-01 16:40

本文关键词： 石墨烯复合材料聚苯胺 Pickering乳化剂空心微球电化学性能　出处：《化学学报》2017年04期 　论文类型：期刊论文

【摘要】：通过对石墨烯进行磺酸化改性使其具有双亲性,以改性后的磺化石墨烯(SGR)作为Pickering乳化剂稳定含有苯胺的油相,加入过硫酸铵引发剂,采用Pickering乳液聚合的方式一步合成具有独特空心结构的聚苯胺-石墨烯微球(PANI-SGR HS).详细探究了石墨烯磺化程度、乳化剂浓度和油水比等因素对磺化石墨烯稳定乳液的影响,研究结果表明:SGR的润湿性对Pickering乳液的稳定性有着重要影响;SGR浓度为0.5 mg·mL~(-1)时即可以稳定乳液,随着SGR浓度的增大,Pickering乳液滴尺寸呈减小趋势;在油相体积分数小于60%时,即可以得到比较稳定的乳液.利用扫描电子显微镜对微球的形貌进行了表征,并对所制备空心微球的电化学性能进行了探究,在电流密度为1 A·g~(-1)时,其修饰电极的比电容可达480.59 F·g~(-1),相比于普通二维PANI-SGR提高了103.5%.
[Abstract]:Graphene was modified by sulfation to make it amphiphilic. The modified graphene was used as Pickering emulsifier to stabilize the oil phase containing aniline and to add ammonium persulfate initiator. Polyaniline-graphene microspheres with unique hollow structure were synthesized by Pickering emulsion polymerization. The degree of sulfonation of graphene was investigated in detail. The effects of emulsifier concentration and oil-water ratio on the stability of sulfonated graphene emulsion were investigated. The results showed that wettability of Pickering emulsion had an important effect on the stability of Pickering emulsion. When the concentration of SGR is 0.5 mg 路mL ~ (-1), the emulsion can be stabilized, and the droplet size of the emulsion decreases with the increase of SGR concentration. A relatively stable emulsion can be obtained when the oil phase volume fraction is less than 60. The morphology of the microspheres was characterized by scanning electron microscope and the electrochemical properties of the hollow microspheres were investigated. When the current density is 1 A 路g ~ (-1), the specific capacitance of the modified electrode can reach 480.59 F 路g ~ (-1), which is 103.5% higher than that of the conventional two-dimensional PANI-SGR.
【作者单位】：江南大学化学与材料工程学院食品胶体与生物技术教育部重点实验室;
【基金】：国家自然科学基金(No.51573072) 江苏省“六大人才高峰”(XNY-012)资助~~
【分类号】：TB332
【正文快照】： Received November 25,2016;published February 28,2017.Supporting information for this article is available free of charge via the Internet at http://sioc-journal.cn.Project supported by the National Natural Science Foundation of China(No.51573072)and the

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