scholarly journals Effect of the Concentration of Pigment Slurry on the Film Performances of Waterborne Wood Coatings

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 635 ◽  
Author(s):  
Yan ◽  
Chang ◽  
Qian
Keyword(s):  
Chemical Resistance ◽  
Impact Resistance ◽  
Base Material ◽  
Chinese Fir ◽  
Temperature Sensitive ◽  
Coating Film ◽  
Wood Coating ◽  
Wood Coatings ◽  
Surface Decoration ◽  
Thermochromic Pigment

Wood surface decoration and protection has become a topic of public concern. In this paper, a temperature-sensitive and reversible thermochromic waterborne wood coating was prepared by using Chinese fir board as the base material and a waterborne wood coating with the pigment slurry of thermochromic microcapsules as the paint base. The optical properties, mechanical properties and chemical resistance of the waterborne wood coating were tested, and its microstructure was analyzed. The results showed that when the concentration of thermochromic pigment slurry was 30.0%, the thermochromic property of the waterborne wood coating was best. The gloss of the waterborne wood coating with 15.0% pigment slurry of thermochromic microcapsules was high. The concentration of thermochromic pigment slurry had no effect on the adhesion, impact resistance, or chemical resistance of the waterborne wood coating. Based on the above results, the waterborne wood coating on Chinese fir had the best comprehensive performance when the concentration of thermochromic pigment slurry was 15.0%. This work will provide a technical reference for the industrialization of the thermochromic coating film on wood.

scholarly journals The Effect of Glass Fiber Powder on the Properties of Waterborne Coatings with Thermochromic Ink on a Chinese Fir Surface

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1733 ◽  
Author(s):  
Yan ◽  
Qian ◽  
Chang ◽  
Lu ◽  
Miyakoshi
Keyword(s):  
Glass Fiber ◽  
Paint Film ◽  
Impact Resistance ◽  
Base Material ◽  
Chinese Fir ◽  
Temperature Sensitive ◽  
Waterborne Coating ◽  
Waterborne Coatings ◽  
Powder Concentration ◽  
Heat Preservation

In this study, the effect of glass fiber powder on the properties of waterborne coatings with thermochromic ink was investigated, using Chinese fir board as the base material and temperature-sensitive thermochromic waterborne coatings with thermochromic ink as the paint base. The concentration of glass fiber powder was determined when the microstructure, optical properties, mechanical properties, liquid resistance, and heat preservation effect were the best. The results showed that the paint film with glass fiber powder concentration of 1.0% to 7.0% had better discoloration performance. With an increase of the glass fiber powder concentration, the gloss of the paint film decreased gradually, and when the concentration of glass fiber powder was 0% to 5.0%, the gloss of the paint film was better. The concentration of glass fiber powder had no effect on the adhesion, impact resistance, and liquid resistance. In the first 2.5 min, the temperature value of the waterborne coating with 3.0% glass fiber powder was higher than that without glass fiber powder, which has a certain heat preservation effect. When the glass fiber powder content was 3.0%, the microstructure of paint film was the best. The composition of paint film with different glass fiber powder concentrations was not different and the discoloration performance of paint film with heat preservation effect was not affected by time. The analysis showed that the waterborne coating with 3.0% glass fiber powder had the best comprehensive performance. This work provides a technical reference for the industrialization of heat preservation and thermochromic coating on wood.

scholarly journals Effect of Coating Process on Performance of Reversible Thermochromic Waterborne Coatings for Chinese Fir

Coatings ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 223 ◽  
Author(s):  
Xiaoxing Yan ◽  
Lin Wang ◽  
Xingyu Qian
Keyword(s):  
Impact Resistance ◽  
Color Difference ◽  
Chinese Fir ◽  
Coating Process ◽  
Practical Applications ◽  
Waterborne Coatings ◽  
Layered Coatings ◽  
Wood Coatings ◽  
Grade 3 ◽  
The Impact

The effect of the coating process on the properties of reversible thermochromic waterborne coating on the surface of Chinese fir was examined. The results demonstrated that the most critical process parameter affecting the color difference and gloss of the coating was the way of adding thermochromic ink. The coating process had little influence on the adhesion, impact resistance adding, liquid resistance, and original properties of the coating. There was no obvious gloss variation in the coating under different coating processes. For the (3+3) layered coatings, when the thermochromic ink was added to the topcoats, the discoloration performance was the most obvious and the comprehensive performance of coating was better. Meanwhile, the gloss was 55.6%, the adhesion grade was grade 0, the impact resistance was 5.0 kg·cm, the liquid resistance grade of the coating to sodium chloride, ethanol and detergent was grade 1, and the liquid resistance grade to red ink was grade 3. The discoloration performance of the coating was stable under the conditions of aging and time change. This study provides new insight into preparing thermochromic intelligent waterborne wood coatings with potential practical applications on Chinese fir wood surfaces, and also lays a foundation for its application in furniture engineering.

scholarly journals Wood coating dust emission in the Malaysian furniture industry: A case study

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 6874-6885
Author(s):  
Jegatheswaran Ratnasingam ◽  
Tajuddin Hj Arshad ◽  
Albert Khoo ◽  
Hazirah Ab Latib ◽  
Lim Choon Liat ◽  
...  
Keyword(s):  
Dust Emission ◽  
Dust Particles ◽  
Coating Film ◽  
Furniture Industry ◽  
Wood Coating ◽  
Dust Extraction ◽  
Film Hardness ◽  
Wood Coatings ◽  
Clean Air ◽  
Industry Needs

The objectives of this study were to evaluate the current dust extraction efficiency used in the Malaysian furniture industry and also the effectiveness of using engineered nanoparticle (ENP)-added coatings to reduce dust emission in the wood finishing operation. This study was in response to the enforcement of the Clean Air Regulation (2014), which requires significant improvements in the air quality and the work environment in the wood-based industry in Malaysia. A series of sanding experiments with different abrasive grit sizes and different coating types were conducted to determine the dust emission levels. The results suggested that higher capture velocity of 30 m/s was necessary to effectively capture the wood coating dust emitted. Further, ENP-added wood coatings did not differ markedly from conventional coatings with regard to dust emission characteristics. The study also revealed that total dust concentration had an inverse relationship, while the amount of finer dust particles was linearly related to the coating film hardness. Therefore, to comply with the Clean Air Regulation, the Malaysian furniture industry needs to significantly improve its dust extraction system.

scholarly journals Application of Confocal Raman Microscopy for the Analysis of the Distribution of Wood Preservative Coatings

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 621 ◽  
Author(s):  
Toru Kanbayashi ◽  
Atsuko Ishikawa ◽  
Masahiro Matsunaga ◽  
Masahiko Kobayashi ◽  
Yutaka Kataoka
Keyword(s):  
Surface Layer ◽  
Cell Walls ◽  
Wood Preservative ◽  
Cellular Level ◽  
Raman Microscopy ◽  
Confocal Raman Microscopy ◽  
Wood Coating ◽  
Coating Technology ◽  
Wood Coatings ◽  
Confocal Raman

The distribution of wood preservative coatings in wood surface layer was assessed at the cellular level using confocal Raman microscopy. Raman images were created based on the fingerprint Raman bands of the different wood polymers and coating components (resin and pigment). The wood cell walls and the distribution of the resin and pigment were clearly visualized at the same time. It was concluded that confocal Raman microscopy is suitable for the evaluation of the microdistribution of wood coatings, providing valuable information for the improvement of wood coating technology.

scholarly journals Preparation of a Fast Water-Based UV Cured Polyurethane-Acrylate Wood Coating and the Effect of Coating Amount on the Surface Properties of Oak (Quercus alba L.)

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1414 ◽  
Author(s):  
Jin Wang ◽  
Huagui Wu ◽  
Ru Liu ◽  
Ling Long ◽  
Jianfeng Xu ◽  
...  
Keyword(s):  
Optimal Parameter ◽  
Uv Curing ◽  
Hydroxyl Groups ◽  
Quercus Alba ◽  
Coating Properties ◽  
Wood Coating ◽  
Polyurethane Acrylate ◽  
Wood Coatings ◽  
Wood Flooring ◽  
Water Based

A fast water-based ultraviolet light (UV) curing polyurethane-acrylate (PUA) wood coating was prepared in the laboratory, and applied on oak (Quercus alba L.) at different coating amounts. The PUA wood coating can be fast cured within 22 min, which highly improved the drying speed compared to normal water-based wood coatings (often higher than 35 min). The coating amounts affected the coating properties after curing on oak. With the increase of coating amount, the adhesion, hardness and gloss value of surface increased to different extents. Meanwhile, the surface of sample became smooth gradually because the voids of the oak were filled. Thus, higher coating amount resulted in better coating properties. However, no significant increase of penetration depth was found. During curing, the hydroxyl groups of the wood reacted with the coating. The optimal parameter in this study was the coating amount of 120 g/m2, where the adhesion reached 1 (with 0–5% cross-cut area of flaking along the edges), with the hardness of 2H and the gloss of 92.56°, which met the requirement of Chinese standard GB/T 18103–2013, and could be used for engineered wood flooring.

scholarly journals Effect of High-Temperature Calcined Wheat Straw Powder after Lignin Removal on Properties of Waterborne Wood Coatings

Coatings ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 444 ◽  
Author(s):  
Xiaoxing Yan ◽  
Lin Wang ◽  
Xingyu Qian
Keyword(s):  
High Temperature ◽  
Wheat Straw ◽  
Impact Resistance ◽  
Color Difference ◽  
Waterborne Coating ◽  
Waterborne Coatings ◽  
Lignin Removal ◽  
Wood Coatings ◽  
Level 1 ◽  
Mold Resistance

The effect of adding wheat straw powder after lignin removal (WSPALR) and high-temperature calcined WSPALR on the hardness, adhesion, and resistance to impact, color difference, and mold resistance of waterborne coatings was studied. The results showed that the hardness was the highest of 6H when the concentration of WSPALR was 1.0%–2.0%. WSPALR and high-temperature calcined WSPALR had little effect on the adhesion and impact resistance of waterborne coatings, and the resistance to impact was about 10.0 kg cm. When both the concentration of WSPALR and high-temperature calcined WSPALR were 0.5%, the waterborne coating had the best adhesion of Level 1. The addition of high-temperature calcined WSPALR maintained the color difference of the original coatings. A high WSPALR concentration showed better mold resistance than a low concentration WSPALR, and the inhibition effect of high-temperature calcined WSPALR on Trichoderma was better than that of WSPALR. When the concentration of WSPALR calcined at a high temperature was 0.5%, it showed a better hardness of 4H, Level 1 adhesion, 10.0 kg cm resistance to impact, and 1.1 color difference of the waterborne coating. This work has important application value for mold resistance of wood coatings.

scholarly journals Mechanism of Thermochromic and Self-Repairing of Waterborne Wood Coatings by Synergistic Action of Waterborne Acrylic Microcapsules and Fluorane Microcapsules

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 56
Author(s):  
Xiaoxing Yan ◽  
Wenting Zhao ◽  
Lin Wang
Keyword(s):  
Color Change ◽  
Acrylic Resin ◽  
Synergistic Action ◽  
The Self ◽  
Coating Film ◽  
Repair Rate ◽  
Waterborne Coatings ◽  
Comprehensive Properties ◽  
Wood Coatings ◽  
Dual Functions

The fluorane thermochromic microcapsules and waterborne acrylic resin microcapsules were added into waterborne coatings at the same time to prepare intelligent waterborne coating film with dual functions of color change and self-repairing. The coating film prepared by adding 15.0% fluorane microcapsules and 5.0% waterborne acrylic resin microcapsules to the primer at the same time had better comprehensive properties. At this time, the coating film changed from yellow to colorless. The repair rate of the coating film was 58.4%. When the temperature was lower than 32 °C, waterborne acrylic resin microcapsules can improve the thermochromic performance of the coating film with fluorane microcapsules. Waterborne acrylic resin microcapsules can alleviate the color change of coating film with fluorane microcapsules. The fluorane microcapsules can improve the self-repairing performance of coating film with waterborne acrylic resin microcapsules. The results lay a theoretical and technical foundation for multifunctional coating film.

scholarly journals WATER PERMEABILITY OF EXTERIOR WOOD COATINGS: WATERBORNE ACRYLATE DISPERSIONS FOR WINDOWS

2018 ◽  
Vol 13 (3) ◽  
pp. 1-16 ◽  
Author(s):  
Štěpán Hýsek ◽  
Hakan Fidan ◽  
Miloš Pánek ◽  
Martin Böhm ◽  
Kamil Trgala
Keyword(s):  
Water Vapor ◽  
Film Thickness ◽  
Water Absorption ◽  
Liquid Water ◽  
Coating Film ◽  
Water Vapor Absorption ◽  
Protective Function ◽  
Wood Coatings ◽  
Vapor Absorption ◽  
Exterior Wood

Permeability of coatings for water and water vapor is an important factor in their wood protective function. In this study, the permeability of coatings in terms of liquid water and water vapor absorption and desorption was measured based on different parts of the standard EN 927. This study evaluated the permeability of commercial coating systems and ascertained effects of coating layering on the coating permeability. For this measurement, six different waterborne acrylate dispersions were used as paint on spruce test samples. The results clearly revealed that liquid water and water vapor uptake were affected by coating film thickness, number of coats, and coating composition (producer). It was ascertained that the type of coating pigmentation affected water absorption of coatings and that with a constant coating film thickness, the number of coats affected water vapor absorption and desorption, but not water absorption. Furthermore, it was observed that the number of coats affected the correlation between the coating film thickness and water vapor absorption and desorption. The values for water vapor absorption were much higher than for liquid water absorption and, unlike the water vapor absorption rate, the water vapor desorption rate was approximately 50% lower.

scholarly journals Manufacture and Characteristics of Oil-Modified Refined Lacquer for Wood Coatings

2018 ◽  
Author(s):  
Chia-Wei Chang ◽  
Hsiu-Ling Lee ◽  
Kun-Tsung Lu
Keyword(s):  
Linseed Oil ◽  
Impact Resistance ◽  
Polymeric Coating ◽  
Drying Time ◽  
Nitrogenous Compounds ◽  
Drying Oils ◽  
Drying Oil ◽  
Wood Coatings ◽  
Speed Up ◽  
Oriental Lacquer

Oriental lacquer, a natural and renewable polymeric coating, comes from the sap produced by lacquer trees. For practical application, oriental lacquer must be refined to reduce excess water and enhance its quality. In this study, drying oils were blended with oriental lacquer during the refining process to prepare an oil-modified refined lacquer (OMRL). The type and adding amount (0, 10, and 20% by wt.) of drying oils for wood coatings utilization were evaluated. Rhus succedanea oriental lacquer is composed of 54.1% urushiols, 34.3% water, 7.2% plant gum, and 4.4% nitrogenous compounds, and drying oils, including tung oil (TO), linseed oil (LO), and dehydrated castor oil (DCO) were used as materials in this study. The results show that the drying oil acts as a diluent, which reduces the viscosity and enhances the workability and could shorten the touch-free drying time and speed up the hardened drying of the OMRL. The results also indicate that the hardness, mass retention, Tg, tensile strength, abrasion resistance, and lightfastness of OMRL films decrease as more drying oils are blended. Conversely, the bending resistance, elongation at break, impact resistance increase, and particularly, the gloss, is greatly improved through the blending of more drying oils. In conclusion, the LO-modified refined lacquer (RL) has the highest film gloss and the DCO-modified RL has the shortest drying time for coating; otherwise, the film properties are similar among the three types of drying oil.

scholarly journals Investigation of the Properties of Color-Changing Powder Water-Based Coating

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 815 ◽  
Author(s):  
Xiaoxing Yan ◽  
Yijuan Chang
Keyword(s):  
Paint Film ◽  
Impact Resistance ◽  
Color Difference ◽  
Chinese Fir ◽  
Coating Process ◽  
Waterborne Coating ◽  
Resistance Level ◽  
Waterborne Coatings ◽  
Film Adhesion ◽  
The Impact

The suitable coating process and discoloration effect of the waterborne paint added with color-changing powder on the surface of Chinese fir were investigated using an orthogonal method from three factors of the number of primers, topcoats, and the way of adding color-changing powder. It was found that the number of primers showed the greatest significance on the color difference of paint film, and the method of adding the color-changing powder had the most influence on the gloss of the paint film. Meanwhile, the impact resistance, paint film adhesion, liquid film resistance level, the gloss of coatings, and the composition of waterborne coatings were not affected by the three factors. The results indicated that two primers, two topcoats with color-changing powder, were the most suitable coating technologies for the reversible color waterborne coating to obtain a stable and sustainable discoloration effect. These results will provide a reference for the construction and application of a color-changing coating.

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