本文選題：液相剝離 + 石墨烯打印墨水　； 參考：《武漢大學(xué)》2017年碩士論文

【摘要】：壓電噴墨打印技術(shù)具備無需制版,避免基底材料損傷和加工精度高等優(yōu)勢,成為印刷電子領(lǐng)域中研究較多的印刷方式之一。然而應(yīng)用于壓電噴墨的墨水普遍有穩(wěn)定性不好和成本較高等缺陷,限制了壓電噴墨技術(shù)的應(yīng)用。石墨烯具有優(yōu)異的機(jī)械、光電性能,逐漸成為印刷電子研究的熱點(diǎn)。本論文首先基于液相剝離方式優(yōu)化制備了滿足噴墨印刷電子要求的高濃度石墨烯分散液;通過調(diào)整其Z值獲得具備良好墨滴噴射形態(tài)的打印墨水;通過控制打印參數(shù)優(yōu)化了噴墨打印的圖案化過程,并將其應(yīng)用于透明導(dǎo)電薄膜的制備。主要內(nèi)容包括:首先結(jié)合噴墨打印對溶劑型墨水的黏度、表面張力等印刷適性要求,選擇液相剝離制備的方法,并分析了影響石墨烯濃度和結(jié)構(gòu)的因素。通過改變剝離實(shí)驗(yàn)中的剝離溶劑、石墨粉潤濕條件、剝離功率和剝離時(shí)間等條件制備石墨烯分散液。結(jié)果表明使用氮甲基吡咯烷酮溶劑,與石墨粉混合溶液濃度為8mg/ml時(shí),在反應(yīng)釜中160℃下加熱5h后,然后進(jìn)行16h時(shí)長,功率為40W的剝離實(shí)驗(yàn),最終所得樣品的濃度達(dá)到0.3mg/ml,該樣品無需附加提純工序可直接應(yīng)用于噴墨墨水的配制。其次在打印墨水的配制過程中,噴墨打印的Z值范圍決定了墨水能否穩(wěn)定、持續(xù)地形成墨滴,由于所制得分散液的Z值不在最佳范圍。為了獲得良好的墨滴噴射形態(tài),結(jié)合Z值公式向墨水中加入乙二醇對噴墨打印的Z值進(jìn)行了調(diào)整。分別測試不同乙二醇配比墨水的密度、黏度值以及表面張力值,計(jì)算墨水的Z值。使用Fujifilm DMP 2800打印機(jī)來觀察不同Z值墨水的墨滴噴射形態(tài),結(jié)果表明添加20%乙二醇的墨水墨滴噴射形態(tài)良好。此外經(jīng)測試該墨水的濃度為0.27mg/ml,分散性和穩(wěn)定性良好,可應(yīng)用于噴墨打印圖案化。最后針對噴墨打印圖案化過程中,柔性基底墨水成膜不均勻,疊印條件研究不足等問題進(jìn)行了探索。分別測試Epson ME-10打印機(jī)的分辨率設(shè)置,承印基底和墨水的表面張力關(guān)系以及疊印時(shí)機(jī)、方式、次數(shù)的設(shè)置等條件對印后墨膜厚度、均勻程度的影響。結(jié)果表明在PET基底墨水有較好潤濕性,當(dāng)設(shè)置為最高分辨率時(shí),待前一次墨跡徹底干燥后再進(jìn)行打印,然后采用"錯位交叉"的疊印方式,重復(fù)進(jìn)行12次后可獲得更均勻的薄膜樣品。經(jīng)測試打印在PET底基的薄膜其透明度要優(yōu)于ITO,在ITO基底的石墨烯薄膜可以有效改善ITO的機(jī)械電學(xué)性能。
[Abstract]:Piezoelectric inkjet printing technology has become one of the most researched printing methods in the field of printing and electronics because of its advantages such as avoiding the damage of substrate material and high machining precision.However, the application of piezoelectric ink jet technology is limited because of its poor stability and high cost.Graphene, with its excellent mechanical and photoelectric properties, has gradually become a hot spot in the field of printing electronics.In this paper, the high concentration graphene dispersions which meet the electronic requirements of ink jet printing were prepared based on the liquid stripping method, and the printing ink with good droplet spray morphology was obtained by adjusting the Z value of the dispersion solution.The patterning process of ink jet printing was optimized by controlling the printing parameters and applied to the preparation of transparent conductive film.The main contents are as follows: firstly, according to the requirements of ink jet printing on the viscosity and surface tension of solvent ink, the liquid phase peeling method is selected, and the factors affecting the concentration and structure of graphene are analyzed.Graphene dispersions were prepared by changing the stripping solvent, the wetting conditions of graphite powder, the stripping power and the peeling time.The results showed that when the concentration of nitromethyl pyrrolidone and graphite powder was 8mg/ml, the stripping experiment was carried out at 160 鈩，

本文編號：1747611