本文關(guān)鍵詞：納米銀導(dǎo)電墨水的制備及室溫打印性能研究　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 納米銀 導(dǎo)電墨水 噴墨打印 導(dǎo)電性 燒結(jié)

【摘要】：在電子工業(yè)中,電路板及導(dǎo)電線路的制作方法是非常重要的。噴墨打印技術(shù)是一種代替?zhèn)鹘y(tǒng)絲網(wǎng)印刷、蝕刻法、膠板印刷等方法的新型印刷電路板制作技術(shù)。通過使用有機(jī)或無機(jī)導(dǎo)電墨水,噴墨打印技術(shù)可以無掩膜、非接觸的打印不同的高精度、高密度的導(dǎo)電線路。由于噴墨打印技術(shù)對設(shè)備要求低、工藝參數(shù)簡單、原材料節(jié)省且環(huán)境友好,因而被大量應(yīng)用在消費(fèi)類電子產(chǎn)品領(lǐng)域,如柔性電路板、太陽能電池、生物傳感器、透明導(dǎo)電膜、電磁波屏蔽材料、無線射頻電子標(biāo)簽等。噴墨打印技術(shù)的核心是導(dǎo)電功能墨水的制備,其中納米銀導(dǎo)電墨水由于制備工藝簡單、導(dǎo)電性能優(yōu)良且墨水化學(xué)穩(wěn)定性好而備受關(guān)注。本文使用硝酸銀、檸檬酸鈉為主要原料,通過化學(xué)還原法制備出20 nm粒徑和50 nm粒徑的兩種納米銀顆粒。通過使納米銀粒子分散于特殊配比的溶劑中制備得到:1)20 nm粒徑納米銀導(dǎo)電墨水;2)50 nm粒徑納米銀導(dǎo)電墨水;3)根據(jù)調(diào)配兩種粒徑納米銀顆粒配比獲得復(fù)合納米銀導(dǎo)電墨水。其次,本文通過噴墨打印技術(shù)將以上三類導(dǎo)電墨水圖案化,研究了納米銀燒結(jié)結(jié)構(gòu)的形貌及其導(dǎo)電性能。研究發(fā)現(xiàn)60%復(fù)合納米銀顆粒(20 nm粒徑納米銀:50 nm粒徑納米銀=2:1)的導(dǎo)電墨水打印結(jié)構(gòu)導(dǎo)電性能最佳,其電阻率低至3.576×10-6Ω·cm。進(jìn)而,本文以60%復(fù)合納米銀顆粒導(dǎo)電墨水為原料,研究了打印層數(shù)及燒結(jié)溫度對打印導(dǎo)電層電阻率的影響。實(shí)驗(yàn)發(fā)現(xiàn)當(dāng)打印層數(shù)為17層且燒結(jié)溫度為180℃時(shí),可以獲得最低電阻率,其值為3.542×10-6Ω·cm。在研究燒結(jié)溫度對打印層電阻率的影響時(shí),發(fā)現(xiàn)當(dāng)打印在富士相紙基板上時(shí)導(dǎo)電層在室溫下可自發(fā)燒結(jié)。其內(nèi)在原因在于富士相紙基板表面結(jié)構(gòu)主要為硅醇基團(tuán),該基團(tuán)可破壞納米銀粒子表面有機(jī)物包覆層的檸檬酸根與銀粒子的配位鍵,致使納米銀粒子接近、并且接觸而燒結(jié)。在此基礎(chǔ)上,選取不同陰離子鈉鹽配制成溶液,分別研究了NaOH溶液、NaCl溶液、Na_2CO_3溶液和Na_2SO_4溶液對納米銀打印結(jié)構(gòu)的室溫?zé)Y(jié)影響。結(jié)果表明,NaOH溶液和NaCl溶液均可在室溫下促進(jìn)導(dǎo)電層燒結(jié),經(jīng)過NaCl溶液處理導(dǎo)電層在室溫下電阻率可低至5.3×10-6Ω·cm。
[Abstract]:In the electronics industry, circuit board and manufacturing method of conductive lines is very important. Inkjet printing technology is a kind of instead of the traditional screen printing, etching, new production technology of printed circuit board offset printing method. By using the organic or inorganic conductive ink, ink-jet printing technology can mask, high precision contact print different, conductive lines. Due to the high density of ink-jet printing technology low requirement on equipment, simple process parameters, raw material saving and environmental friendly, which is widely used in the field of consumer electronics products, such as flexible circuit board, solar cell, biosensors, transparent conductive film, electromagnetic shielding materials, wireless the RF electronic label. The core of inkjet printing technology is conductive ink preparation, including nano silver conductive ink because of simple preparation, good conductivity and chemical stability of ink Good and concern. This paper use silver nitrate, sodium citrate as the main raw material was prepared with 20 nm diameter and 50 nm diameter of two kinds of silver nanoparticles by chemical reduction. The silver nanoparticles dispersed in a specific ratio of solvent preparation: 1) 20 nm particle size of nano silver conductive ink; 2) 50 nm particle size of nano silver conductive ink; 3) according to the deployment of two kinds of particle size of nano silver particles to obtain composite ratio of nano silver conductive ink. Secondly, the above three kinds of conductive ink is patterned by inkjet printing technology, on the morphology of silver nanoparticles sintered structure and conductive properties. The study found that 60% nano composite silver particles (20 nm diameter: 50 nm nano silver particle size of nano silver =2:1) conductive ink printing structure conductive property is best, the resistivity as low as 3.576 x 10-6. Cm.. And then, based on the 60% composite nanoparticles of silver conductive ink as raw materials, research the printing layer Effect of sintering temperature on the conductive layer and the resistivity of the print. The experimental results showed that when the printing layer is 17 and the sintering temperature is 180 degrees centigrade, the lowest resistivity can be obtained, and its value is 3.542 * 10-6. Cm. on the effect of sintering temperature on the printing layer resistivity, when printed on Fuji paper substrate when conducting layer at room temperature can have a fever. The reason lies in its inherent Fuji substrate surface structure is mainly the silanol groups, the group of silver nanoparticles can damage the surface of organic coating layer of citrate and silver nanoparticles coordination bonds, resulting in silver nanoparticles and close contact and sintering. On this basis, choose different prepare the sodium anion solution, NaOH solution and NaCl solution were studied at room temperature, sintering of Na_2CO_3 solution and Na_2SO_4 solution on nano silver print structure effect. The results showed that NaOH and NaCl solution were available in the room The conductive layer is sintered at temperature. The resistivity of the conductive layer can be as low as 5.3 x 10-6 Omega cm. at room temperature after NaCl solution treatment.

【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN41

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