Nano-Silica/Urea-Formaldehyde Resin-Modified Fast-Growing Lumber Performance Study

Weng, Meng-Qi; Zhu, Yushan; Mao, Weiguo; Zhou, Jichun; Xu, Wei

doi:10.3390/f14071440

Cited by 16 publications

(13 citation statements)

References 16 publications

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“…The transparency of dyed transparent wood can give household products which added transparent wood elements a richer appearance and design sense, thereby greatly increasing the commercial value of transparent wood. 12 Basswood belongs to hardwood, 13 but its density is lower than that of most hardwoods and it is softer. It has the following characteristics: wear resistance, corrosion resistance, not easy to crack, fine wood grain, and easy to process.…”

Section: ■ Introductionmentioning

confidence: 99%

“…If the wood dyeing process can be combined with the transparent wood preparation technology, it is expected to produce transparent wood with rich colors. The transparency of dyed transparent wood can give household products which added transparent wood elements a richer appearance and design sense, thereby greatly increasing the commercial value of transparent wood …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on Transparent Basswood Dyed with Reactive Dyes and Its Properties

Zhao,

Rong,

et al. 2024

ACS Omega

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In this work, sodium chlorite method was used to remove lignin in basswood and then the wood was dyed with reactive red X-3B dye. Finally, ultraviolet curing resins with a refractive index similar to cellulose were vacuum-impregnated into the wood to obtain red transparent wood (RTW). Nowadays, transparent wood can be given color by various means and has a wide range of application prospects in the field of transparent wood decoration, but the color embodiment is relatively single. The aim was to develop a low-priced, easy-to-use process for the preparation of colored transparent wood with a sound color system. Transparent wood with colors will have more decorative and commercial value. The chemical composition, microscopic morphology, mechanical properties, and optical properties of dyed transparent wood were examined and analyzed. The results of the chemical composition analysis showed that after delignified treatment, the wood lost a large amount of lignin. After the dyeing treatment, the content of cellulose, hemicellulose, and lignin was slightly lost, and reactive dye groups appeared in the wood. Infrared spectra of transparent samples showed that the resin was successfully impregnated into the wood. The microscopic morphology analysis results showed that a small amount of dye molecules aggregated on the cell walls after dyeing treatment, and the resin was impregnated into the porous cellulose skeleton of the wood, filling the wood pores. The analysis of mechanical properties showed that the maximum tensile strength of dyed transparent wood reached 122.31 MPa, which was a higher resistance to tensile force compared to raw wood (with a maximum tensile strength of 97.56 MPa); the elongation at break reached 6.26%, which had better toughness compared to log (4.04%). Optical performance analysis showed that the transmittance of dyed transparent wood reached 81%, and dyeing did not change the transmittance of transparent wood. In addition, after undergoing yellowing resistance experiments, the color difference change of dyed transparent wood was much smaller than that of transparent wood.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on Transparent Basswood Dyed with Reactive Dyes and Its Properties

Zhao,

Rong,

et al. 2024

ACS Omega

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“…Wood is a natural renewable material [1]. With a warm feel and beautiful pattern, wood is widely used in the furniture industry [2][3][4][5]. Given a characterization of dry shrinkage and wet expansion, as well as the impact of environmental factors, the surface of wooden furniture often cracks.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano-Silver Solution Microcapsules Mixed with Rosin-Modified Shellac Microcapsules on the Performance of Water-Based Coating on Andoung Wood (Monopetalanthus spp.)

Zou,

Pan,

Zhang

et al. 2024

Coatings

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To obtain dual functions of antibacterial and self-healing of a coating, nano-silver solution microcapsules coated with urea formaldehyde resin were selected for antibacterial agents, and rosin-modified shellac microcapsules coated with melamine formaldehyde resin were selected for repairing agents. The optical, mechanical, antibacterial, self-healing, and other physicochemical properties of the coatings were analyzed. The method of adding two microcapsules independently did not affect the coating’s hardness. When the primer was prepared by self-healing microcapsules and the topcoats were prepared by antibacterial microcapsules, the hardness of the prepared coatings was maintained at 3 H, with the adhesion up to class 2, the impact strength up to 18 kg·cm, and the roughness as low as 1.144 µm. The elongation at fracture of the coatings prepared by adding microcapsules independently was improved by 2.2%. The self-healing microcapsules release the repair agents to improve the mechanical properties of the coatings. In terms of the antibacterial properties of the coatings, the method that involves adding the microcapsules independently is better than mixed adding. Against Escherichia coli, the antibacterial rate of coatings prepared by adding microcapsules independently reached 82%. Against Staphylococcus aureus, the antibacterial rate of coatings reached 83.3%. At the same time, the self-healing rate was up to 41.1%. The two microcapsules were added to the water-based coating independently to obtain antibacterial and self-healing functions with good comprehensive properties. By modifying coatings on the Andoung wood (Monopetalanthus spp.) with antibacterial microcapsules and self-healing microcapsules, it is possible to obtain good antibacterial properties, further protect the wood substrate, and broaden the application range of functional coatings.

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“…In recent years, research on toughening thermosetting resins with inorganic nanoparticles has begun to attract academic attention [13][14][15][16]. The essence of this method is to introduce inorganic nanoparticles into thermosetting resins, utilizing the nanoparticles' ultrasmall size and high surface area to interact with thermosetting resin molecules at the microscopic scale, thereby improving the toughness and heat resistance of wood [14,15,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Research on the Impregnation Process and Mechanism of Silica Sol/Phenolic Resin Modified Poplar Wood

Wang,

Zhang,

et al. 2023

Forests

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Phenolic resin-modified materials partially reduce the toughness of the wood. In this study, organic–inorganic composite modifiers were used to modify the wood. Silica sol/phenolic resin was prepared through in-situ polymerization, and poplar wood was modified using a vacuum pressure impregnation process, enhancing its toughness. Orthogonal experiments were conducted, and the impact toughness of the modified poplar wood was used as the evaluation index. Through orthogonal experiments, using the impact toughness of modified poplar as the evaluation indicator, it was found that when the average particle size of the silica sol is 8–15 nm, the pressure is 1.2 MPa, and the pressurization time is 3 h, the impregnation-modified poplar’s impact toughness reaches its optimum, improving by 84.1% and 135.4% compared to the raw material and phenolic resin impregnated wood, respectively. The Fourier Transform Infrared Spectroscopy (FT-IR) results indicated that the characteristic absorption peak of Si-O-Si appears in the poplar wood after impregnation, confirming the formation of new silicon-oxygen (Si-O) chemical bonds. X-ray Photoelectron Spectroscopy (XPS) analysis revealed that a chemical reaction occurs between the impregnation liquid and the wood, generating Si-O-C. Subsequently, through Dynamic Mechanical Analysis (DMA) and Thermogravimetric (TGA) analysis, it was understood that this chemical reaction significantly enhances the thermal stability and toughness of the impregnated material, making it superior to the original poplar material. The TGA further unveiled that, compared to untreated poplar, the thermal stability of the impregnated material has been notably improved. Lastly, Scanning Electron Microscopy (SEM) analysis demonstrated that the composite impregnation liquid successfully permeates and fills the interior of the poplar cells.

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Nano-Silica/Urea-Formaldehyde Resin-Modified Fast-Growing Lumber Performance Study

Cited by 16 publications

References 16 publications

Study on Transparent Basswood Dyed with Reactive Dyes and Its Properties

Study on Transparent Basswood Dyed with Reactive Dyes and Its Properties

Effect of Nano-Silver Solution Microcapsules Mixed with Rosin-Modified Shellac Microcapsules on the Performance of Water-Based Coating on Andoung Wood (Monopetalanthus spp.)

Research on the Impregnation Process and Mechanism of Silica Sol/Phenolic Resin Modified Poplar Wood

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