scholarly journals Improving sustainability in wood coating: testing lignin and cellulose nanocrystals as additives to commercial acrylic wood coatings for bio-building

2021 ◽  
Vol 14 (6) ◽  
pp. 499-507
Author(s):  
J Jusic ◽  
S Tamantini ◽  
M Romagnoli ◽  
V Vinciguerra ◽  
E Di Mattia ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Wood Coating ◽  
Wood Coatings

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 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 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.

Modification of cellulose nanocrystals as reinforcement derivatives for wood coatings

2014 ◽  
Vol 77 (4) ◽  
pp. 813-820 ◽  
Author(s):  
Bouddah Poaty ◽  
Vahe Vardanyan ◽  
Luana Wilczak ◽  
Gregory Chauve ◽  
Bernard Riedl
Keyword(s):  
Cellulose Nanocrystals ◽  
Wood Coatings

scholarly journals Mechanical Properties of a Soy Protein Isolate–Grafted–Acrylate (SGA) Copolymer Used for Wood Coatings

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1137
Author(s):  
Bin Feng ◽  
Di Wang ◽  
Yuhui Li ◽  
Junpeng Qian ◽  
Chenlei Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Soy Protein ◽  
Soy Protein Isolate ◽  
Protein Isolate ◽  
Wood Coating ◽  
Pencil Hardness ◽  
Soybean Protein Isolate ◽  
Elongation At Break ◽  
Wood Coatings

Changing demands have led to rapidly growing interest in the modification of waterborne wood coatings. To improve the performance of a polyacrylate wood coating, especially the strength, hardness, and abrasion resistance of the film, a soy protein isolate–grafted–acrylate (SGA) copolymer was prepared in an aqueous solution with ammonium persulfate (APS) as an initiator and sodium pyrosulfite (SPS) as an unfolding agent for the soybean protein isolate (SPI). The emulsion was characterized using transmission electron microscopy, Fourier-transform infrared spectroscopy (FTIR), and a particle size analyzer. Furthermore, the mechanical properties of the film, including the tensile strength, elastic modulus, elongation at break, and pencil hardness, were measured. The results showed that the glass transition temperature of the polyacrylic resin decreased to 35 °C after the SPI grafting. The elastic modulus of the film increased from 0.317 to 46.949 MPa, and the elongation at break decreased from 453.133% to 187.125% as the addition of SPI varied from 0 to 4 g, respectively. The pencil hardness of the wood coating increased from HB to 3H. This paper proposes a feasible route for the utilization of SPI for wood coatings.

Tuning the Magnetic Alignment of Cellulose Nanocrystals from Perpendicular to Parallel Using Lepidocrocite Nanoparticles

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Sugam Kumar ◽  
Yulia Trushkina ◽  
Gergely Nagy ◽  
Christina Schütz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Cellulose Nanocrystals ◽  
Small Angle Neutron Scattering ◽  
Lower Amount ◽  
Magnetic Alignment ◽  
Polarized Optical Microscopy ◽  
Parallel Orientation ◽  
Weak Magnetic Fields

The magnetic alignment of cellulose nanocrystals (CNC) and lepidocrocite nanorods (LpN), pristine and in hybrid suspensions has been investigated using contrast-matched small-angle neutron scattering (SANS) under in situ magnetic fields (0 – 6.8 T) and polarized optical microscopy. The pristine CNC (diamagnetic) and pristine LpN (paramagnetic) align perpendicular and parallel to the direction of field, respectively. The alignment of both the nanoparticles in their hybrid suspensions depends on the relative amount of the two components (CNC and LpN) and strength of the applied magnetic field. In the presence of 10 wt% LpN and fields < 1.0 T, the CNC align parallel to the field. In the hybrid containing lower amount of LpN (1 wt%), the ordering of CNC is partially frustrated in all range of magnetic field. At the same time, the LpN shows both perpendicular and parallel orientation, in the presence of CNC. This study highlights that the natural perpendicular ordering of CNC can be switched to parallel by weak magnetic fields and the incorporation of paramagnetic nanoparticle as LpN, as well it gives a method to influence the orientation of LpN.<br>

Applications of Cellulose Nanocrystals: A Review

2018 ◽  
Author(s):  
Shaoqu Xie ◽  
◽  
Xiao Zhang ◽  
Michael P. Walcott ◽  
Hongfei Lin ◽  
...  
Keyword(s):  
Cellulose Nanocrystals
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