Acrylic Resin Filling Cell Lumen Enabled Laminated Poplar Veneer Lumber as Structural Building Material
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Method
2.2.1. Modification of the Wood
2.2.2. Performance Characterization
3. Results and Discussion
3.1. Optimization of Acrylic Resin System
3.1.1. Optimization of Solid Content of Acrylic Resin Liquid
3.1.2. Optimization of Curing Agent Addition
3.1.3. DSC Characterization of Acrylic Resin
3.2. Performance Improvement of Poplar Veneer by Resin−Filled Cell Cavities under Optimized System
3.2.1. Microstructure and Density of Resin-Filled Modified Veneer
3.2.2. Mechanical Properties of Resin-Filled Modified Veneer
3.2.3. Dimensional Stability of Resin-Filled Modified Veneer
3.3. Performance of Laminated Composite Materials Based on Resin-Filled Modified Veneer
3.3.1. Mechanical Properties of Modified Laminated Veneer Lumber
3.3.2. Dimensional Stability of Modified Laminated Veneer Lumber
4. Conclusions
- (1)
- Acrylic resin-optimized system with a 25% solid content and a 10% curing agent dosage, when the resin liquid viscosity is 19.89 mPa·s, and the resin conversion rate is 81.95%.
- (2)
- With a weight gain of 81.36% and a density of 0.69 g/cm3, the optimized resin system can effectively filled the poplar veneer cell lumen, which significantly improves the mechanical strength and dimensional stability of the poplar veneer.
- (3)
- The modified laminated veneer timber’s static flexural strength and modulus of elasticity are 123.13 MPa and 12,944.76 MPa, respectively, which exceeded the flexural strength index values (modulus of elasticity 12,500 MPa and static flexural strength 35 MPa) for structural timber specified in the highest strength class (TCT40) of Chinese Standard GB 50005-2017. In addition, in terms of mechanical properties, compared with untreated laminated veneer, the tensile strength, impact toughness, hardness and wear resistance were 58.81%, 19.50%, 419.18%, 76.83%, respectively. In terms of dimensional stability, compared with untreated laminated veneer, the water absorption rate, water absorption thickness expansion rate and water absorption width expansion rate increased by 44.38%, 13.90% and 37.60%, respectively. It has significantly improved mechanical strength and dimensional stability, and can be used as a structural building material.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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---|---|---|
MOR | 200 × 50 × 10 | GB-T 20241-2006 |
MOE | 200 × 50 × 10 | GB-T 20241-2006 |
CS | 23 × 15 × 15 | GB-T 17657-2013 |
HS | 50 × 50 × 15 | GB-T 17657-2013 |
IBS | 300 × 20 × 20 | GB-T 1938-2009 |
TS | 408 × 25 × 25 | GB-T 1938-2009 |
Attrition value | 100 × 100 × 15 | GB-T 17657-2013 |
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Gao, X.; Liu, Y.; Qi, Y.; Gong, R.; Yao, F.; Luo, J.; Zhao, Y.; Dai, Y.; Wang, J.; Lian, C.; et al. Acrylic Resin Filling Cell Lumen Enabled Laminated Poplar Veneer Lumber as Structural Building Material. Polymers 2022, 14, 5277. https://doi.org/10.3390/polym14235277
Gao X, Liu Y, Qi Y, Gong R, Yao F, Luo J, Zhao Y, Dai Y, Wang J, Lian C, et al. Acrylic Resin Filling Cell Lumen Enabled Laminated Poplar Veneer Lumber as Structural Building Material. Polymers. 2022; 14(23):5277. https://doi.org/10.3390/polym14235277
Chicago/Turabian StyleGao, Xudong, Yiliang Liu, Yanran Qi, Ruizhi Gong, Fengbiao Yao, Jiajia Luo, Yueying Zhao, Yong Dai, Jinguo Wang, Chenglong Lian, and et al. 2022. "Acrylic Resin Filling Cell Lumen Enabled Laminated Poplar Veneer Lumber as Structural Building Material" Polymers 14, no. 23: 5277. https://doi.org/10.3390/polym14235277