Preparation and properties of ZnO QDs water-based inkjet fluorescent ink

doi:10.16085/j.issn.1000-6613.2022-1537

Abstract

Abstract:

Using zinc oxide quantum dots (ZnO QDs) as fluorescent pigment, water as solvent and polyethylene glycol (PEG) as film forming material, ZnO QDs water-based inkjet fluorescent ink was synthesized. By analyzing ink viscosity, surface tension, printability parameter Z value and fluorescence intensity, the effect of PEG concentration on ink rheology and fluorescence properties was explored, and the optimal ink formulation was obtained. The results showed that the ink fluorescence intensity was the best when the amount of ZnO QDs was 30mg/mL and the volume fraction of PEG aqueous solution was 40%. The viscosity was 7.56mPa·s, the surface tension was 51.95mN/m and the Z value was 6.77, which met the quality index of inkjet printing ink. The contact angle was 58.71°, there was no coffee ring phenomenon, and the adhesion property was good. The prepared ink can combine with two-dimensional code technology, fluorescence quenching scheme and combined printing method to achieve multiple anti-counterfeiting effects, and thus had practical application value.

Key words: nanoparticles, zinc oxide quantum dots, water-based inkjet ink, fluorescence properties, anti-counterfeiting application

摘要：

以氧化锌量子点（ZnO QDs）为荧光颜料，水为溶剂，聚乙二醇（PEG）为成膜物质合成ZnO QDs水性喷墨荧光墨水，通过分析墨水黏度、表面张力、适印性参数Z值与荧光强度，探究PEG浓度对墨水流变性与荧光性能的影响，获得墨水最佳配方。结果表明，ZnO QDs添加量为30mg/mL，PEG水溶液体积分数为40%时，墨水荧光强度最佳；黏度为7.56mPa·s，表面张力为51.95mN/m，Z值为6.77，满足喷墨印刷墨水的质量指标；接触角为58.71°，无咖啡环现象，附着性能良好。所制备墨水可结合二维码技术、荧光猝灭方案、组合印刷方式实现多重防伪效果，具有实际应用价值。

关键词: 纳米粒子, 氧化锌量子点, 水性喷墨墨水, 荧光性能, 防伪应用

CLC Number:

TB34

XU Guobin, LIU Honghao, LI Jie, GUO Jiaqi, WANG Qi. Preparation and properties of ZnO QDs water-based inkjet fluorescent ink[J]. Chemical Industry and Engineering Progress, 2023, 42(6): 3114-3122.

徐国彬, 刘洪豪, 李洁, 郭家奇, 王琪. ZnO量子点水性喷墨荧光墨水制备及性能[J]. 化工进展, 2023, 42(6): 3114-3122.

Figures/Tables 7

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PEG水溶液体积分数/%	We	Re	Z值
10	7.73	33.90	12.19
20	7.95	28.57	10.13
30	8.54	22.79	7.80
40	8.74	20.02	6.77
50	9.45	15.62	5.08
60	9.72	11.59	3.72

PEG水溶液体积分数/%	We	Re	Z值
10	7.73	33.90	12.19
20	7.95	28.57	10.13
30	8.54	22.79	7.80
40	8.74	20.02	6.77
50	9.45	15.62	5.08
60	9.72	11.59	3.72

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