石墨烯/乙基纤维素导电油墨的制备与导电性能
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摘要
随着电子技术的发展,需要各种符合要求的导电油墨的制备。以超临界二氧化碳剥离天然鳞片石墨制备的石墨烯为导电剂,用乙基纤维素作为黏结剂制备石墨烯/乙基纤维素导电油墨。通过SEM、TEM、AFM对石墨烯进行形貌表征和层数分析,采用热重分析、四探针电阻测试分析导电油墨涂层的导电性。结果表明:超临界法制备的石墨烯表面形貌完整,石墨烯层数小于四层;导电油墨的干燥温度在300℃时方块电阻最低,为15.5Ω。制备的导电油墨涂膜后电阻稳定,具有良好的柔性,能够在智能穿着和智能理疗等领域应用。
This paper is a response to the necessity for preparing various conductive inks that meet the requirements due to the development of electronic technology. The paper describes the preparation of graphene/ethyl cellulose conductive ink by stripping natural flake graphite with supercritical carbon dioxide as the conductive agent and ethyl cellulose as the binder; the research into the morphology and layer number of graphene by SEM, TEM and AFM; and the analysis of the conductivity of conductive ink coating by thermogravimetric analysis and four-probe resistance test. The results show that supercritical method could prepare grapheme with intact surface morphology and with layers less than 4; and the lowest block resistance is 15.5 Ω, when the drying temperature of conductive ink is 300 ℃. It follows that after coating, conductive ink fabricated by this research could provide a better resistance stability and flexibility and could work better for applications from intelligent wear to intelligent physiotherapy.
This paper is a response to the necessity for preparing various conductive inks that meet the requirements due to the development of electronic technology. The paper describes the preparation of graphene/ethyl cellulose conductive ink by stripping natural flake graphite with supercritical carbon dioxide as the conductive agent and ethyl cellulose as the binder; the research into the morphology and layer number of graphene by SEM, TEM and AFM; and the analysis of the conductivity of conductive ink coating by thermogravimetric analysis and four-probe resistance test. The results show that supercritical method could prepare grapheme with intact surface morphology and with layers less than 4; and the lowest block resistance is 15.5 Ω, when the drying temperature of conductive ink is 300 ℃. It follows that after coating, conductive ink fabricated by this research could provide a better resistance stability and flexibility and could work better for applications from intelligent wear to intelligent physiotherapy.
引文
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[2] 邱欣斌,刘飞翔,陈国华.石墨烯导电油墨的研究进展[J].化工进展,2018,37(4):1480-1488.
[3] Hyun W J,Secor E B,Hersam M C,et al.High-resolution patterning of graphene by screen printing with a silicon stencil for highly flexible printed electronics[J].Advanced Materials,2015,27(1):109-115.
[4] Ammu S,Dua V,Agnihotra S R,et al.Flexible,all-organic chemiresistor for detecting chemically aggressive vapors[J].Journal of the American Chemical Society,2012,134(10):4553-4556.
[5] Georgakilas V,Demeslis A,Ntararas E,et al.Hydrophilic nanotube supported graphene-water dispersible carbon superstructure with excellent conductivity[J].Advanced Functional Materials,2015,25(10):1473-1487.
[6] 胡玉婷.在超临界二氧化碳体系中石墨烯剥离技术的研究 [D].济南:山东大学,2014.
[7] 王振廷,李洋,尹吉勇.石墨烯-碳纳米管导电油墨的制备及其导电性能[J].黑龙江科技大学学报,2018,28(5):514-518.
[8] Jain A,Ong V,Jayaraman S,et al.Supercritical fluid immobilization of horseradish peroxidase on high surface area mesoporous activated carbon[J].Journal of Supercritical Fluids,2016,107:513-518.
[9] Lonkar S P,Deshmukh Y S,Abdala A A.Recent advances in chemical modifications of graphene[J].Nano Research,2015,8(4):1039-1074.
[10] 王振廷,戴东言,李洋,等.石墨烯的机械剥离法制备及表征[J].黑龙江科技大学学报,2018,28(2):200-203.
[11] 王宗宾.石墨烯的制备及其印刷油墨的合成[D].哈尔滨:哈尔滨工业大学,2017.