Guangxue Chen

Synthesis and Characterization of Acrylic Resin Applied for UV-Curing Conductive Ink

With the rapid development of electronic technology, printable electronics guides the development direction of the miniaturization of electronic products, flexibility, environmental protection to electronic equipment. As the key material of printable electronics, it’s practical significance for the development of conductive ink. In general, current conductive ink has some problems such as high sintering temperature and poor adhesion. In order to improve the poor adhesion of conductive ink layer, easy to deinking and other bad mechanical phenomena, this paper prepared acrylic UV curing resin. Water-soluble light-cured acrylic resin with double-bond functional groups was obtained through the reaction of different acrylic monomers with isocyanate. And the influence of reaction conditions on the acrylic resin was analyzed. At last, acrylic resin with an average molecular weight of 7800 was prepared under the condition of 50% solvent, 3% initiator, 2% the dosage of chain transfer agent, the reaction time is 5 h. And the characterization of the isocyanate modified acrylic resin was discussed through Fourier transform infrared spectrometer (FTIR), differential scanning calorimetry (DSC) etc.

Extraction of Natural Pigment from Purple Potato in Preparation of Edible Ink

Natural pigment is safe and non-toxic, and the pigment in purple potatoes is bright in color, which is a good material to produce edible ink. This paper reported a green method of extracting the pigment of purple potatoes and produced edible ink with it. The optimum condition of extracting pigment was obtained by varying ethanol concentrations, feed liquid ratios, extraction times and temperatures. The obtained pigment was characterized by spectrophotometer. The result showed that the edible ink was in good color on paper, biscuits and bread and the light could make it fade in a short time.

Preparation of Superhydrophobic Al Alloy for Metal Packaging and Study on Its Corrosion Resistance

At present, the studies of stability about aluminum alloy superhydrophobic surfaces are incomplete, the preparation process is required to simplify and the production cost is needed to reduce, it is difficult to obtained with durable microstructure and durable low surface energy materials on superhydrophobic surfaces simultaneously. The chemical and electrochemical methods are intended to construct rough surfaces on aluminum alloy in the paper. We have studied about superhydrophobic stability, the roughness, rough structure, micro-nanostructure arrangement and chemical composition in material surfaces by test equipments, in order to obtain an optimal model of rough structure on aluminium alloy surface. In this study, aluminum alloys with different surface roughness were prepared, then put the same surface coating materials on the aluminum alloy substrates, the corrosion resistance of different surface roughness on aluminum alloys were discussed. The results show that surface roughness increased can improve the corrosion resistance of aluminum alloy in weak acid, weak alkaline and salt solutions. When the contact angle is greater than 150°, the corrosion resistance of aluminum alloys has been improved greatly.

Research on Theory and Application of Computer Ink Color Matching

Spot color ink has been essential in security printing. Convenient computer ink color matching become more and more popular. The color matching model is the core part of computer color matching. It is very important to understand and master the theory of color matching. In this paper, the principle of computer color matching based on Kubellka-Munk theory was also described. Finally, four color spots (356C, 717C, 7431C, 643C of PANTONE) were measured. Color differences of formulations respectively were 1.4, 0.3, 0.5 and 0.5, which all meet the requirement of printing standard. Therefore, the accuracy of the computer color matching was demonstrated.

Preparation and Characterization of Nano Silver Applied in UV-Curing Conductive Ink

Compared with ordinary conductive ink, the UV-curing conductive ink combines UV-curing technology and conductive ink technology, which gives the conductive ink good printability and broad application prospects. This chapter describes the main processes of generating UV-curing nano silver conductive ink, and analyses the results. The chapter includes two parts as follows: Firstly, using AgNO3 as the precursor, hydration hydrazine as reducing agent, PVP as protective agent, and controlling the reaction conditions,nano silver particles is generated by the liquid phase reduction method. And by using experimental methods such as Malvern Zetasizer, SEM, the nano silver particles is characterized. The results show that the size of nano silver particles is controllable, and it has good dispersion and appearance. Finally, using nano silver as UV-curing conductive filler, UV-curing nano silver conductive ink is generated, and its conductive properties are discussed. Results show that the content of conductive filler has an effect on the resistivity of conductive ink.

Adaptive multi-resolution halftone image embedding

In the publishing and printing applications, hidden data is embedded into images for copyright protection and ownership generally. Based on the multi-resolution halftone watermarking (MRHW), adaptive multi-resolution halftone watermarking algorithm (AMRHW) is proposed in the paper. According to the characteristics of the carrier image, the pixels of the watermark halftone image are embedded into the position of the minimal impact in the carrier image, and the locations of these pixels are stored in the decoding matrix. Then, the carrier image is processed by error diffusion, and thus the watermarked image is obtained. In the watermark extraction process, according to the data of the decoding matrix, the corresponding pixels are extracted and grouped together. The watermark image is viewed directly. The results show that the AMRHW can obtain better quality of the embedding than the MRHW, while the decoding matrix can ensure great security of the watermark image.

Technology application of cylindrical lens grating stereoscopic printing

Cylindrical lens grating is widely used in stereoscopic printing application, the principle of cylinder lens grating used in stereoscopic printing was discoursed in this paper, the process flow of cylindrical lens grating stereoscopic printing was analyzed, the cylindrical lens grating how to print the image to be a better stereo effect was discussed. At the same time, some common technical parameters of cylindrical lens grating in stereoscopic printing have been given, which offers a certain practical and theoretical guidance in stereoscopic printing.