Preparation and properties of light-resistant printing UV ink modified with nano-TiO₂ on wood substrate

Abstract

Nano-TiO 2 was used to modify the yellow UV ink by physically blending. The modified and unmodified UV ink was respectively used for wood printing. The aging test was carried out on the printed wood and several physical, morphological, and chemical analyses were performed. The results showed that the UV ink underwent oxidation during aging, caused colour and gloss changes, surface bubbling, and polymer chain decomposition both for the unmodified and nano-TiO 2 groups. However, on a macro level, the main structure of the UV ink was not destroyed. The aging phenomenon of nano-TiO 2 modified group was not as severe as the unmodified one. During light aging, the primary amine, CO 2 , and carboxylic acid were yielded, and NH radicals were generated, which promoted the formation of conjugated structure and the chromogenic enamine. Nano-TiO 2 could inhibit these reactions. Consequently, the light-resistant polychromasia of UV ink was improved by adding of nano-TiO 2 .

A Comparison of the Performance of Two Kinds of Waterborne Coatings on Bamboo and Bamboo Scrimber

“…In theory, the dry film thickness was 18 µm. The film sample was then dried in a cool, dry, and dark environment for 1 week before use [23]. Three replicates were coated for each sample.…”

Coating Performance of Water-Based Polyurethane-Acrylate Coating on Bamboo/Bamboo Scrimber Substrates

“…The characterizations of the samples were carried out by scanning electron microscope coupled with energy dispersed X-ray analysis, atomic force microscopy (AFM), Fourier transform infrared spectroscopy equipped with an attenuated total reflection (ATR-FTIR), and X-ray photoelectron spectra (XPS) analyses [21]. The microstructures of the above samples were observed by scanning electron microscope (JEOL JSM-6301F, Japan) with an acceleration voltage of 20 kV.…”

Highly Hydrophobic and Self-Cleaning Heat-Treated Larix spp. Prepared by TiO2 and ZnO Particles onto Wood Surface

“…The heat-treated wood is exposed to ultraviolet radiation, rain, microorganism, termites, and attack by drilling animals for outdoor occasions [4][5][6], while inorganic-wood composites give new functions to wood. Synergies between wood and inorganic components enhance the thermal stability, color fastness, mechanical performance, and dimensional stability of the wood [7][8][9]. Previous studies have shown that hybrid inorganic-organic film can effectively reduce the moisture absorption of the wood [10].…”