WO2016015657A1 - Highly dispersed and viscosity controllable transparent electrode ink with carbon nanotubes - Google Patents

Highly dispersed and viscosity controllable transparent electrode ink with carbon nanotubes Download PDF

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WO2016015657A1
WO2016015657A1 PCT/CN2015/085530 CN2015085530W WO2016015657A1 WO 2016015657 A1 WO2016015657 A1 WO 2016015657A1 CN 2015085530 W CN2015085530 W CN 2015085530W WO 2016015657 A1 WO2016015657 A1 WO 2016015657A1
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carbon nanotube
carrier
acid
viscosity
transparent electrode
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PCT/CN2015/085530
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French (fr)
Chinese (zh)
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郝海燕
蔡丽菲
戴雷
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北京阿格蕾雅科技发展有限公司
广东阿格蕾雅光电材料有限公司
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Priority to KR1020177003541A priority Critical patent/KR20170041739A/en
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    • C09D11/00—Inks
    • C09D11/52—Electrically conductive inks

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  • the invention relates to a conductive ink containing carbon nanotubes, in particular to a carbon nanotube composite conductive ink with high dispersion and good viscosity controllability.
  • Carbon nanotubes are carbon materials with typical lamellar hollow structure characteristics.
  • the tube body constituting carbon nanotubes is composed of hexagonal graphite carbon ring structural units and has a special structure (radial size is nanometer order One-dimensional quantum material with an axial dimension of the order of microns.
  • Its tube wall is composed of several layers to tens of layers of coaxial tubes, and the layer is kept at a fixed distance of about 0.34 nm, and the diameter is generally 2-20 nm.
  • the P electrons of the carbon atoms of the carbon nanotubes form a wide range of delocalized ⁇ bonds, and thus the conjugation effect is remarkable. Since the structure of the carbon nanotubes is the same as that of the graphite, it has good electrical properties.
  • carbon nanotubes As a kind of electrode material, carbon nanotubes have received much attention in the field of electronic science.
  • the advantage is that as a transparent electrode material, the excellent photoelectric properties, super-aligned carbon nanotubes can be spun by its excellent mechanical properties.
  • the film in addition to carbon nanotubes, has a high resistance to environmental corrosion and is not affected by the environment.
  • the transparent electrode prepared by the film-drawing process of the carbon nanotube super-sequential film can be widely applied on the touch screen (CN1016254665A), the square resistance is large (greater than 1000 ⁇ / ⁇ ), and the transmittance is 80%.
  • the power consumption of such a carbon nanotube film is large, and the performance of the device may be affected by the thermal effect of the electrode itself.
  • the invention is based on the application of the carbon nanotube solution blending process in the transparent electrode material, and provides a high-dispersion, viscosity-adjustable carbon nanotube transparent electrode ink, which is compounded by ultrasonic dispersion, mechanical stirring, cell pulverization and the like.
  • the technology realizes the uniform dispersion of the carbon nanotubes and the organic carrier, and the prepared ink has good stability and viscosity controllable.
  • the highly dispersed, viscosity-controllable carbon nanotube transparent electrode ink consists of the following components and their weight percentages:
  • the carrier one is an alkylated quaternary ammonium base
  • the carrier two is a water-soluble anionic acidic substance
  • the solvent is water
  • the alkylated quaternary ammonium base is cetyltrimethylammonium hydroxide, dodecyltrimethylammonium hydroxide, tetradecyltrimethylammonium hydroxide, benzyltrimethylammonium hydroxide One or several combinations.
  • the water-soluble anionic acidic substance is butyl benzoic acid (PT) dodecylbenzenesulfonic acid, phthalic acid, p-tert-butylbenzoic acid, p-hydroxybenzoic acid, ⁇ -phenylacrylic acid, phenylacetic acid, water One or several combinations of salicylic acid.
  • PT butyl benzoic acid
  • the carbon nanotube powder is a single-walled carbon nanotube, a multi-walled carbon nanotube, a double-walled carbon nanotube, or a modified carbon nanotube.
  • a method for preparing a highly dispersed, viscosity-controllable carbon nanotube transparent electrode ink comprising the following steps;
  • the steps (2) and (3) are ultrasonically dispersed, and the step (4) is performed by magnetic stirring.
  • the preparation method of the pure carbon nanotube powder is as follows: the carbon nanotubes are ultrasonically dispersed into a suspension in methanol, and then the carbon nanotube suspension is irradiated in a UV light cleaning machine, and centrifuged to obtain carbon nanotubes. Powder; the powder is added to a mixed aqueous solution of concentrated HNO 3 and ammonium persulfate, the magnet is stirred, refluxed at 120 ° C for 5 h, centrifuged, repeatedly centrifuged with deionized water to neutral, and dried to obtain pure carbon nano Tube powder.
  • the pure carbon nanotube powder is prepared by dispersing the carbon nanotubes in a suspension in an organic solvent, allowing to stand for swelling, centrifuging, and washing; adding to concentrated nitric acid, reacting at 120 ° C for 4 hours, centrifuging, and washing. Neutral, dry pure carbon nanotube powder.
  • the present inventors have found that when the carrier 1 and the carrier 2 are mixed at a certain concentration, a viscosity-visible viscoelastic solution system is formed.
  • the present invention employs its viscosity-adjustable property to disperse high-concentration carbon nanotubes, and the viscous dispersion system is easy to form a film.
  • the film-forming carrier is easily desorbed in ethanol and remains little on the surface of the film after further water washing.
  • the carbon nanotubes can be effectively dispersed.
  • the ink of the invention has good dispersibility, good stability and adjustable viscosity, and the formed carbon nanotube transparent conductive film layer has good electrical conductivity and optical transmittance and flexibility in the visible light range.
  • the conductivity of the flexible carbon nanotube transparent conductive film can be adjusted at (100 ⁇ / ⁇ - 1 M ⁇ / ⁇ ).
  • the carbon nanotube conductive ink has low preparation cost, energy saving and environmental protection, and the product has no toxicity to human body, no side effect, and the process is simple.
  • a and B are images of different magnifications.
  • Figure 2 is an SEM image of a pure single-walled carbon nanotube film (SWCNT),
  • A, B, and C are images of different magnifications.
  • SWCNTs single-walled carbon nanotubes
  • the SWCNT suspension was placed in a UV light washer for 40 min to obtain SWCNT powder; 20 ml of deionized water was placed in a single-mouth flask, and 10 ml of concentrated HNO3 (68 wt%) was added, and 5 wt% ammonium persulfate was added.
  • the aqueous solution of (APS) was uniformly mixed, and then the purified SWCNT powder was added, and the magnetic particles were stirred, and refluxed at 120 ° C for 5 hours.
  • the deionized water was repeatedly centrifuged (7000 rpm, 10 min) three times to obtain a purified single-walled carbon nanotube as shown in Fig. 1.
  • the highly dispersed viscosity-adjustable carbon nanotube conductive ink according to the present invention can be used to prepare a fine electrode pattern by using a spin coating and a laser ablation technique at room temperature, or can be realized by a technique such as inkjet printing.
  • the one-shot preparation of the electrode pattern, the morphology of the prepared film is shown in Fig. 2.
  • the composite conductive ink of the invention has strong process operability, and can adopt the inkjet printing technology, the spin coating technology and the matched lithography technology, and can realize the preparation of carbon nanometer on the surface of glass, transparent crystal, transparent ceramic, polymer film and the like.
  • the conductive film layer has a film surface topography as shown in FIG.
  • the carbon nanotubes In the carbon nanotube dispersion liquid, the carbon nanotubes have good dispersion properties, and a single bundle of network dispersion is formed. After the carbon nanotubes are coated on the surface of the PET film, the carbon nanotube film formed by the ethanol or HNO 3 immersion is a relatively uniform network link.
  • the carbon nano-transparent conductive film layer formed by the ink of the present invention has good electrical conductivity and optical transmittance and flexibility in the visible light range.
  • the conductivity of the flexible carbon nanotube transparent conductive film can be adjusted at (100 ⁇ / ⁇ - 1 M ⁇ / ⁇ ).
  • the carbon nano-conductive ink has low preparation cost, energy saving and environmental protection, and the product has no toxicity to the human body, has no side effects, and has simple process. Compared with the performance of carbon nano-conductive polymer electrode materials at home and abroad, the performance of the carbon nano-flexible electrode material prepared by the invention is at a leading level. See Table 2.
  • the carbon nanotube flexible electrode ink developed by the invention and the transparent flexible conductive film prepared by the invention have good application prospects in the flexible transparent electrodes required for display devices such as touch screens, solar cells and OLEDs.

Abstract

A highly dispersed and viscosity controllable transparent electrode ink with carbon nanotubes, which consists of the following constituents having the following weight percentage contents: 0.03%-1% of a pure carbon nanotube powder, 0.2%-0.5% of a carrier 1, 0.2%-0.5% of a carrier 2, and 98%-99% of a solvent, wherein the carrier 1 is an alkylated quaternary ammonium base, the carrier 2 is a water-soluble anionic acidic substance, and the solvent is water. A method for preparing the ink comprises: taking a part of the solvent to prepare aqueous solutions from the carrier 1 and the carrier 2, dispersing the pure carbon nanotube powder material into the aqueous solution of carrier 1, then adding the remaining solvent, and dropwise adding the aqueous solution of carrier 2 under stirring, wherein ultrasonic dispersion is adopted in steps (2) and (3), and magnetic stirring is adopted in step (4).

Description

高分散、粘度可控的碳纳米管透明电极墨水Highly dispersed, viscosity controllable carbon nanotube transparent electrode ink 技术领域Technical field
本发明涉及一种含有碳纳米管的导电墨水，特别是涉及一种高分散、粘度可控性好的碳纳米管复合导电墨水。The invention relates to a conductive ink containing carbon nanotubes, in particular to a carbon nanotube composite conductive ink with high dispersion and good viscosity controllability.
背景技术Background technique
碳纳米管是一种具有典型的层状中空结构特征的碳材料，构成碳纳米管的管身由六边形石墨碳环结构单元组成，是一种具有特殊结构(径向尺寸为纳米量级，轴向尺寸为微米量级)的一维量子材料。它的管壁构成主要为数层到数十层的同轴圆管，层与层之间保持固定的距离，约为0.34nm，直径一般为2～20nm。碳纳米管的碳原子的P电子形成大范围的离域π键，因此共轭效应显著。由于碳纳米管的结构与石墨的片层结构相同，具有很好的电学性能。为此碳纳米管作为一种电极材料在电子科学领域中受到较大的关注，其优势在于作为透明电极材料优异的光电性能，超顺排的碳纳米管以其优良的机械性能可以纺丝拉膜，此外碳纳米管的耐环境腐蚀性能较强，不会受到环境的影响而降低。Carbon nanotubes are carbon materials with typical lamellar hollow structure characteristics. The tube body constituting carbon nanotubes is composed of hexagonal graphite carbon ring structural units and has a special structure (radial size is nanometer order One-dimensional quantum material with an axial dimension of the order of microns. Its tube wall is composed of several layers to tens of layers of coaxial tubes, and the layer is kept at a fixed distance of about 0.34 nm, and the diameter is generally 2-20 nm. The P electrons of the carbon atoms of the carbon nanotubes form a wide range of delocalized π bonds, and thus the conjugation effect is remarkable. Since the structure of the carbon nanotubes is the same as that of the graphite, it has good electrical properties. As a kind of electrode material, carbon nanotubes have received much attention in the field of electronic science. The advantage is that as a transparent electrode material, the excellent photoelectric properties, super-aligned carbon nanotubes can be spun by its excellent mechanical properties. The film, in addition to carbon nanotubes, has a high resistance to environmental corrosion and is not affected by the environment.
然而，由于碳纳米管之间很强的范德华作用力(～500eV/μm)和大的长径比(>1000)，通常容易形成大的管束，难以分散，极大地制约了其优异光电性能的发挥和实际应用的开发。虽然碳纳米管超顺排薄膜通过拉膜工艺制备的透明电极在触摸屏上得以大面积应用(CN1016254665A)，但其方阻较大(大于1000Ω/□)，透过率80％。相对于电阻要求更高高透明电极薄膜的电子器件来说，此类碳纳米管薄膜的功耗很大，会由于电极自身的热效应影响器件的性能。However, due to the strong van der Waals force (~500 eV/μm) between the carbon nanotubes and the large aspect ratio (>1000), it is easy to form a large tube bundle, which is difficult to disperse, which greatly restricts its excellent photoelectric properties. Play and develop in practical applications. Although the transparent electrode prepared by the film-drawing process of the carbon nanotube super-sequential film can be widely applied on the touch screen (CN1016254665A), the square resistance is large (greater than 1000 Ω/□), and the transmittance is 80%. Compared with electronic devices in which the resistance requires a higher transparent electrode film, the power consumption of such a carbon nanotube film is large, and the performance of the device may be affected by the thermal effect of the electrode itself.
发明内容Summary of the invention
本发明立足于碳纳米管溶液的共混工艺在透明电极材料中的应用，提供一种高分散、粘度可调控的碳纳米管透明电极墨水，通过超声波分散、机械搅拌、细胞粉碎等工艺方法复合技术，实现了碳纳米管与有机载体的均匀分散，制备的墨水稳定性好、粘度可调控。The invention is based on the application of the carbon nanotube solution blending process in the transparent electrode material, and provides a high-dispersion, viscosity-adjustable carbon nanotube transparent electrode ink, which is compounded by ultrasonic dispersion, mechanical stirring, cell pulverization and the like. The technology realizes the uniform dispersion of the carbon nanotubes and the organic carrier, and the prepared ink has good stability and viscosity controllable.
高分散、粘度可控的碳纳米管透明电极墨水，由下列成分及其重量百分含量组成：The highly dispersed, viscosity-controllable carbon nanotube transparent electrode ink consists of the following components and their weight percentages:
Figure PCTCN2015085530-appb-000001
Figure PCTCN2015085530-appb-000001
Figure PCTCN2015085530-appb-000002
Figure PCTCN2015085530-appb-000002
所述载体一为烷基化季铵碱，载体二为水溶性阴离子型酸性物质，所述溶剂为水。The carrier one is an alkylated quaternary ammonium base, the carrier two is a water-soluble anionic acidic substance, and the solvent is water.
所述烷基化季铵碱为十六烷基三甲基氢氧化铵，十二烷基三甲基氢氧化铵、十四烷基三甲基氢氧化铵、苄基三甲基氢氧化铵中的一种或几种组合。The alkylated quaternary ammonium base is cetyltrimethylammonium hydroxide, dodecyltrimethylammonium hydroxide, tetradecyltrimethylammonium hydroxide, benzyltrimethylammonium hydroxide One or several combinations.
所述水溶性阴离子型酸性物质为丁基苯甲酸(P-T)十二烷基苯磺酸、邻苯二甲酸，对叔丁基苯甲酸，对羟基苯甲酸，β-苯丙烯酸、苯乙酸、水杨酸一种或几种组合。The water-soluble anionic acidic substance is butyl benzoic acid (PT) dodecylbenzenesulfonic acid, phthalic acid, p-tert-butylbenzoic acid, p-hydroxybenzoic acid, β-phenylacrylic acid, phenylacetic acid, water One or several combinations of salicylic acid.
所述碳纳米管粉体是单壁碳纳米管、多壁碳纳米管、双壁碳纳米管或者改性的碳纳米管。The carbon nanotube powder is a single-walled carbon nanotube, a multi-walled carbon nanotube, a double-walled carbon nanotube, or a modified carbon nanotube.
高分散、粘度可控的碳纳米管透明电极墨水的制备方法，包括如下步骤；A method for preparing a highly dispersed, viscosity-controllable carbon nanotube transparent electrode ink, comprising the following steps;
(1)取部分溶剂将载体一、载体二制备成水溶液，(1) taking a part of the solvent, preparing the carrier 1 and the carrier 2 into an aqueous solution.
(2)将纯净碳纳米管粉体材料分散于载体一的水溶液中，(2) dispersing the pure carbon nanotube powder material in an aqueous solution of the carrier one,
(3)再加入余下溶剂，(3) add the remaining solvent,
(4)在搅拌下滴加载体二的水溶液。(4) The aqueous solution of the body 2 was dropwise added under stirring.
所述步骤(2)、(3)采用超声分散，所述步骤(4)采用磁力搅拌。The steps (2) and (3) are ultrasonically dispersed, and the step (4) is performed by magnetic stirring.
所述纯净碳纳米管粉体的制备方法为：将碳纳米管在甲醇中超声分散成悬浊液，再将碳纳米管悬浊液放入UV光清洗机中照射，离心，得碳纳米管粉体；将此粉体加入到浓HNO3与过硫酸铵的混合水溶液中，磁子搅拌，120℃下回流反应5h，离心，用去离子水反复离心冲洗至中性，干燥得纯净碳纳米管粉体。The preparation method of the pure carbon nanotube powder is as follows: the carbon nanotubes are ultrasonically dispersed into a suspension in methanol, and then the carbon nanotube suspension is irradiated in a UV light cleaning machine, and centrifuged to obtain carbon nanotubes. Powder; the powder is added to a mixed aqueous solution of concentrated HNO 3 and ammonium persulfate, the magnet is stirred, refluxed at 120 ° C for 5 h, centrifuged, repeatedly centrifuged with deionized water to neutral, and dried to obtain pure carbon nano Tube powder.
所述纯净碳纳米管粉体的制备方法为：将碳纳米管在有机溶剂分散成悬浊液，静置溶胀，离心，清洗；再加入到浓硝酸中，120℃下反应4h，离心，清洗至中性，干燥得纯净碳纳米管粉体。The pure carbon nanotube powder is prepared by dispersing the carbon nanotubes in a suspension in an organic solvent, allowing to stand for swelling, centrifuging, and washing; adding to concentrated nitric acid, reacting at 120 ° C for 4 hours, centrifuging, and washing. Neutral, dry pure carbon nanotube powder.
本发明发现，载体一和载体二以一定浓度混合时，会形成一种粘度可调的粘弹态的溶液体系。本发明采用其粘度可调特性来分散高浓度的碳纳米管，并且粘态的分散体系易于成膜。成膜后的载体容易在乙醇中脱附，在经过进一步水洗后在膜层表面残留很少。The present inventors have found that when the carrier 1 and the carrier 2 are mixed at a certain concentration, a viscosity-visible viscoelastic solution system is formed. The present invention employs its viscosity-adjustable property to disperse high-concentration carbon nanotubes, and the viscous dispersion system is easy to form a film. The film-forming carrier is easily desorbed in ethanol and remains little on the surface of the film after further water washing.
载体一和载体二混合后形成的分散体系的粘度在10-20Pa.s时，可有效分散碳纳米管。When the viscosity of the dispersion formed by mixing the carrier 1 and the carrier 2 is 10-20 Pa.s, the carbon nanotubes can be effectively dispersed.
本发明墨水分散性好、稳定性好，粘度可调，形成的碳纳米管透明导电膜层具有良好的导电性能和可见光范围内光学透过率以及柔性。此柔性碳纳米管透明导电膜导电性可在(100Ω/□-1MΩ/□)可调。此碳纳米管导电墨水制备成本低，节能环保，产品对人体无毒无副作用，工艺简单。The ink of the invention has good dispersibility, good stability and adjustable viscosity, and the formed carbon nanotube transparent conductive film layer has good electrical conductivity and optical transmittance and flexibility in the visible light range. The conductivity of the flexible carbon nanotube transparent conductive film can be adjusted at (100 Ω / □ - 1 M Ω / □). The carbon nanotube conductive ink has low preparation cost, energy saving and environmental protection, and the product has no toxicity to human body, no side effect, and the process is simple.
附图说明DRAWINGS
图1纯单壁碳纳米管(SWCNT)形貌， Figure 1. The morphology of pure single-walled carbon nanotubes (SWCNTs),
其中A，B为不同放大倍数图像。Among them, A and B are images of different magnifications.
图2纯单壁碳纳米管薄膜(SWCNT)的SEM图像，Figure 2 is an SEM image of a pure single-walled carbon nanotube film (SWCNT),
其中A，B，C为不同放大倍数图像。Among them, A, B, and C are images of different magnifications.
具体实施方式detailed description
下面结合实施例对本发明作进一步的详细说明。The present invention will be further described in detail below with reference to the embodiments.
实施例1：Example 1:
1)单壁碳纳米管的纯化：0.05g的单壁碳纳米管(SWCNT)在20ml甲醇中超声分散20min后形成SWNT悬浊液。将此SWCNT悬浊液放入UV光清洗机中处理40min，得到SWCNT粉体；取20ml的去离子水放入单口烧瓶中，再加入10ml的浓HNO3(68wt％)，加入5wt％过硫酸铵(APS)水溶液，混合均匀后加入提纯过的SWCNT粉体，磁子搅拌，120℃下回流反应5h。去离子水反复离心冲洗(7000rpm，10min)3次，得到纯化后的单壁碳纳米管见图1。1) Purification of single-walled carbon nanotubes: 0.05 g of single-walled carbon nanotubes (SWCNTs) were ultrasonically dispersed in 20 ml of methanol for 20 min to form a SWNT suspension. The SWCNT suspension was placed in a UV light washer for 40 min to obtain SWCNT powder; 20 ml of deionized water was placed in a single-mouth flask, and 10 ml of concentrated HNO3 (68 wt%) was added, and 5 wt% ammonium persulfate was added. The aqueous solution of (APS) was uniformly mixed, and then the purified SWCNT powder was added, and the magnetic particles were stirred, and refluxed at 120 ° C for 5 hours. The deionized water was repeatedly centrifuged (7000 rpm, 10 min) three times to obtain a purified single-walled carbon nanotube as shown in Fig. 1.
2)将纯化后的单壁碳纳米管分散在0.05M的3ml十六烷基三甲基氢氧化铵(CTAOH)中，再加入16ml水，经超声分散15min。在此混合体系在磁力搅拌的条件下逐步滴加0.45M对叔丁基苯甲酸0.15-0.2ml，形成高分散的粘度可调的碳纳米分散体系，其粘度在10-20Pa.S内可调。2) The purified single-walled carbon nanotubes were dispersed in 0.05 M of 3 ml of cetyltrimethylammonium hydroxide (CTAOH), and then added with 16 ml of water, and ultrasonically dispersed for 15 minutes. In this mixed system, 0.15-0.2ml of 0.45M p-tert-butylbenzoic acid was gradually added under the condition of magnetic stirring to form a highly dispersed viscosity-adjustable carbon nano-dispersion system, and the viscosity was adjustable within 10-20 Pa.s. .
实施例2：Example 2:
1)取0.05g SWCNT(加入到40ml苯甲酸乙酯溶剂中，超声分散40min,静置溶胀2天后，离心，再依次用乙醇，去离子水离心清洗。将溶胀后的SWCNT加入到30ml浓硝酸中，120℃下反应4h，取出后离心清洗多次至上清液基本澄清，达到离心溶液近中性。离心分离得到的单壁碳纳米管的粉体见图1。1) Take 0.05g of SWCNT (added to 40ml of ethyl benzoate solvent, ultrasonically dispersed for 40min, allowed to swell for 2 days, centrifuged, and then centrifuged with deionized water in ethanol. The swollen SWCNT was added to 30ml of concentrated nitric acid. The reaction was carried out at 120 ° C for 4 h, and after centrifugation, it was centrifuged several times until the supernatant was substantially clarified, and the centrifugation solution was nearly neutral. The powder of the single-walled carbon nanotubes obtained by centrifugation is shown in Fig. 1.
2)将纯化后的单壁碳纳米管分散在0.05M的3ml十二烷基三甲基氢氧化铵中，再加入18ml水，经超声分散15min。在此混合体系在磁力搅拌的条件下逐步滴加0.3M邻苯二甲酸0.1-0.2ml。形成高分散的粘度可调的碳纳米分散体系。其粘度在10-20Pa.S内可调。2) The purified single-walled carbon nanotubes were dispersed in 0.05 M of 3 ml of dodecyltrimethylammonium hydroxide, and then added with 18 ml of water, and ultrasonically dispersed for 15 minutes. In this mixed system, 0.1-0.2 ml of 0.3 M phthalic acid was gradually added under the condition of magnetic stirring. A highly dispersed viscosity-adjustable carbon nanodispersion system is formed. Its viscosity is adjustable within 10-20 Pa.s.
实施例3：Example 3:
1)取0.05g SWCNT加入到40mlDMF中，超声分散40min,静置溶胀48h后，离心，再依次用乙醇，去离子水离心清洗。将溶胀后的SWCNT加入到30ml浓硝酸中，120℃下反应4h，取出后离心清洗多次至上清液基本澄清，达到离心溶液近中性。离心分离得到的单壁碳纳米管的粉体，见图1。1) 0.05 g of SWCNT was added to 40 ml of DMF, sonicated for 40 min, allowed to stand for 48 h, centrifuged, and then centrifuged with deionized water in ethanol. The swollen SWCNT was added to 30 ml of concentrated nitric acid, and reacted at 120 ° C for 4 h. After taking out, it was centrifuged several times until the supernatant was substantially clarified, and the centrifugation solution was nearly neutral. The powder of the single-walled carbon nanotubes obtained by centrifugation is shown in Fig. 1.
2)将纯化后的单壁碳纳米管分散在0.05M的3ml苄基三甲基氢氧化铵中，再加入13ml水，经超声分散15min。在此混合体系在磁力搅拌的条件下逐步滴加0.3M邻苯二甲酸0.15-0.2ml，形成高分散的粘度可调的碳纳米分散体系，其粘度在10-20Pa.S内可调。2) The purified single-walled carbon nanotubes were dispersed in 0.05 M of 3 ml of benzyltrimethylammonium hydroxide, and then added with 13 ml of water, and ultrasonically dispersed for 15 minutes. In this mixed system, 0.15-0.2 ml of 0.3M phthalic acid was gradually added under the condition of magnetic stirring to form a highly dispersed viscosity-adjustable carbon nano-dispersion system, and the viscosity thereof was adjustable within 10-20 Pa.s.
实验例： Experimental example:
1、碳纳米导电薄膜的制备方法1. Preparation method of carbon nano conductive film
本发明所涉及的高分散的粘度可调的碳纳米管导电墨水，可以在室温条件下，采用spin coating和激光烧蚀技术来制备精细的电极图案，也可以采用喷墨打印等技术实现微细结构电极图案的一次性制备，制备的薄膜形貌见图2。The highly dispersed viscosity-adjustable carbon nanotube conductive ink according to the present invention can be used to prepare a fine electrode pattern by using a spin coating and a laser ablation technique at room temperature, or can be realized by a technique such as inkjet printing. The one-shot preparation of the electrode pattern, the morphology of the prepared film is shown in Fig. 2.
本发明的复合导电墨水，其工艺可操作性强，可采用喷墨打印技术，旋涂技术以及配套的光刻技术，可实现在玻璃，透明晶体，透明陶瓷，高分子薄膜等表面制备碳纳米导电膜层，其膜层表面形貌如图2中。The composite conductive ink of the invention has strong process operability, and can adopt the inkjet printing technology, the spin coating technology and the matched lithography technology, and can realize the preparation of carbon nanometer on the surface of glass, transparent crystal, transparent ceramic, polymer film and the like. The conductive film layer has a film surface topography as shown in FIG.
碳纳米管分散液中，碳纳米管的分散性能良好，形成了单束网状分散。碳纳米管在PET薄膜表面涂膜后，经过乙醇或HNO3浸泡，形成的碳纳米管薄膜为较为均一网状链接。In the carbon nanotube dispersion liquid, the carbon nanotubes have good dispersion properties, and a single bundle of network dispersion is formed. After the carbon nanotubes are coated on the surface of the PET film, the carbon nanotube film formed by the ethanol or HNO 3 immersion is a relatively uniform network link.
碳纳米导电薄膜膜层性能检测见表1：The performance test of carbon nano-conductive film layer is shown in Table 1:
表1碳纳米管电薄膜光电性Table 1 Photoelectricity of carbon nanotube electric film
样品名称sample name 方阻Ω/□Square resistance Ω/□ 透过率/550nmTransmittance / 550nm
PET膜层PET film layer ∞∞ 90％90%
碳纳米导电薄膜Carbon nano-conductive film 100-150100-150 87％87%
本发明墨水形成的碳纳米透明导电膜层具有良好的导电性能和可见光范围内光学透过率以及柔性。此柔性碳纳米管透明导电膜导电性可在(100Ω/□-1MΩ/□)可调。此碳纳米导电墨水制备成本低，节能环保，产品对人体无毒无副作用，工艺简单。相比国内外碳纳米导电高分子电极材料的性能，本发明所制备的碳纳米柔性电极材料性能处于领先的水平。参见表2。The carbon nano-transparent conductive film layer formed by the ink of the present invention has good electrical conductivity and optical transmittance and flexibility in the visible light range. The conductivity of the flexible carbon nanotube transparent conductive film can be adjusted at (100 Ω / □ - 1 M Ω / □). The carbon nano-conductive ink has low preparation cost, energy saving and environmental protection, and the product has no toxicity to the human body, has no side effects, and has simple process. Compared with the performance of carbon nano-conductive polymer electrode materials at home and abroad, the performance of the carbon nano-flexible electrode material prepared by the invention is at a leading level. See Table 2.
表2国内外碳纳米导电薄膜与本发明碳纳米薄膜的光电性能比较Table 2 Comparison of Photoelectric Properties of Carbon Nanoconductive Films at Home and Abroad and Carbon Nanofilms of the Invention
样品名称sample name 方阻Ω/□Square resistance Ω/□ 透过率/550nmTransmittance / 550nm
碳纳米导电薄膜Carbon nano-conductive film 100100 87％87%
同行最佳Best peer 152152 83％83%
本发明所研制的碳纳米管柔性电极墨水及其所制备的透明柔性导电薄膜在触摸屏，太阳能电池以及OLED等显示器件所需的柔性透明电极方面具备良好的应用前景。 The carbon nanotube flexible electrode ink developed by the invention and the transparent flexible conductive film prepared by the invention have good application prospects in the flexible transparent electrodes required for display devices such as touch screens, solar cells and OLEDs.

Claims (8)

  1. 高分散、粘度可控的碳纳米管透明电极墨水，由下列成分及其重量百分含量组成：The highly dispersed, viscosity-controllable carbon nanotube transparent electrode ink consists of the following components and their weight percentages:
    Figure PCTCN2015085530-appb-100001
    Figure PCTCN2015085530-appb-100001
    所述载体一为烷基化季铵碱，载体二为水溶性阴离子型酸性物质，所述溶剂为水。The carrier one is an alkylated quaternary ammonium base, the carrier two is a water-soluble anionic acidic substance, and the solvent is water.
  2. 根据权利要求1所述的高分散、粘度可控的碳纳米管透明电极墨水，所述烷基化季铵碱为十六烷基三甲基氢氧化铵，十二烷基三甲基氢氧化铵、十四烷基三甲基氢氧化铵、苄基三甲基氢氧化铵中的一种或几种组合。The highly dispersed, viscosity-controllable carbon nanotube transparent electrode ink according to claim 1, wherein the alkylated quaternary ammonium base is cetyltrimethylammonium hydroxide, dodecyltrimethyl hydroxide One or a combination of ammonium, tetradecyltrimethylammonium hydroxide, benzyltrimethylammonium hydroxide.
  3. 根据权利要求1所述的高分散、粘度可控的碳纳米管透明电极墨水，所述水溶性阴离子型酸性物质为丁基苯甲酸(P-T)十二烷基苯磺酸、邻苯二甲酸，对叔丁基苯甲酸、对羟基苯甲酸、β-苯丙烯酸、苯乙酸、水杨酸一种或几种组合。The high-dispersion, viscosity-controllable carbon nanotube transparent electrode ink according to claim 1, wherein the water-soluble anionic acid substance is butyl benzoic acid (PT) dodecylbenzene sulfonic acid, phthalic acid, One or a combination of p-tert-butylbenzoic acid, p-hydroxybenzoic acid, β-phenylacrylic acid, phenylacetic acid, salicylic acid.
  4. 根据权利要求1所述的高分散、粘度可控的碳纳米管透明电极墨水，所述碳纳米管粉体是单壁碳纳米管、多壁碳纳米管、双壁碳纳米管或者改性的碳纳米管。The high-dispersion, viscosity-controllable carbon nanotube transparent electrode ink according to claim 1, wherein the carbon nanotube powder is single-walled carbon nanotube, multi-walled carbon nanotube, double-walled carbon nanotube or modified Carbon nanotubes.
  5. 权利要求1-4任一所述高分散、粘度可控的碳纳米管透明电极墨水的制备方法，包括如下步骤:The method for preparing a highly dispersed, viscosity-controllable carbon nanotube transparent electrode ink according to any one of claims 1 to 4, comprising the steps of:
    (1)取部分溶剂将载体一、载体二制备成水溶液，(1) taking a part of the solvent, preparing the carrier 1 and the carrier 2 into an aqueous solution.
    (2)将纯净碳纳米管粉体材料分散于载体一的水溶液中，(2) dispersing the pure carbon nanotube powder material in an aqueous solution of the carrier one,
    (3)再加入余下溶剂，(3) add the remaining solvent,
    (4)在搅拌下滴加载体二的水溶液。(4) The aqueous solution of the body 2 was dropwise added under stirring.
  6. 根据权利要求5所述的制备方法，所述步骤(2)、(3)采用超声分散，所述步骤(4)采用磁力搅拌。The preparation method according to claim 5, wherein the steps (2), (3) employ ultrasonic dispersion, and the step (4) employs magnetic stirring.
  7. 根据权利要求5所述的制备方法，所述纯净碳纳米管粉体的制备方法为：将碳纳米管在甲醇中超声分散成悬浊液，再将悬浊液放入UV光清洗机中照射，离心，得碳纳米管粉体；将此粉体加入到浓HNO3与过硫酸铵的混合水溶液中，磁子搅拌，120℃下回流反应5h，离心，用去离子水反复离心冲洗至中性，干燥得纯净碳纳米管粉体。The preparation method according to claim 5, wherein the pure carbon nanotube powder is prepared by ultrasonically dispersing the carbon nanotubes into a suspension in methanol, and then placing the suspension in a UV light cleaning machine. After centrifugation, the carbon nanotube powder is obtained; the powder is added to a mixed aqueous solution of concentrated HNO 3 and ammonium persulfate, the magnet is stirred, refluxed at 120 ° C for 5 h, centrifuged, and repeatedly centrifuged with deionized water to the middle. Sex, dry pure carbon nanotube powder.
  8. 根据权利要求5所述的制备方法，所述纯净碳纳米管粉体的制备方法为：将碳纳米管在有机溶剂分散成悬浊液，静置溶胀，离心，清洗；再加入到浓硝酸中，120℃下反应4h，离心，清洗至中性，干燥得纯净碳纳米管粉体。 The preparation method according to claim 5, wherein the purified carbon nanotube powder is prepared by dispersing the carbon nanotubes in a suspension in an organic solvent, allowing to stand for swelling, centrifugation, washing, and then adding to concentrated nitric acid. The reaction was carried out at 120 ° C for 4 h, centrifuged, washed to neutrality, and dried to obtain pure carbon nanotube powder.
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