Unsaturated Polyester Resin as a Nonformaldehyde Adhesive Used in Bamboo Particle Boards

Wu, Zhenzeng; Aladejana, John Tosin; Liu, Shuqiong; Gong, Xiuqing; Wang, Xiaodong Alice

doi:10.1021/acsomega.1c05969

Cited by 12 publications

(9 citation statements)

References 37 publications

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“…Wu et al produced a bamboo particle board (BPB) using unsaturated polyester resin (UPR) as a coupling agent. Covalent bonds were formed between bamboo particles and UPR, which significantly improved the mechanical strength …”

Section: Introductionmentioning

confidence: 99%

Synthesis of Fully Biomass High-Performance Wood Adhesives from Xylitol and Maleic Anhydride

Jin,

Zeng,

Huang

et al. 2023

ACS Sustainable Chem. Eng.

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Preparing a biobased wood adhesive to solve the formaldehyde pollution problem is crucial. In this study, a xylitolmaleic anhydride hyperbranched polyester resin (XMA) was prepared from two biomass raw materials, xylitol (X) and maleic anhydride (MA). Hyperbranched polyol (HP) and hyperbranched polyacid (HPA) were synthesized via a nucleophilic addition reaction by regulating the molar ratio of X to MA. Then XMA was prepared by melt polycondensation of HP with HPA. The chemical structure of XMA was characterized using Fourier transform infrared spectroscopy (FTIR), 13 C nuclear magnetic resonance ( 13 C NMR), liquid chromatography−mass spectrometry (LC-MS), and gel permeation chromatography (GPC). This double hyperbranched synthesis strategy increases the internal cross-link density of the resin and imparts excellent mechanical properties. Mechanical tests showed that the dry shear strength of the plywood reached 2.37 MPa, and the strengths were 1.72 and 1.75 MPa after immersion in hot and boiling water for 3 h. The green and simple synthesis strategy of XMA is expected to be applied in the wood industry.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Fully Biomass High-Performance Wood Adhesives from Xylitol and Maleic Anhydride

Jin,

Zeng,

Huang

et al. 2023

ACS Sustainable Chem. Eng.

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“…2 Adhesives are widely used in a range of applications and industries as diverse as automotive, 3 biomedical, 4 construction, 5 textiles, 6 and aerospace industries 7 and many aspects of our daily lives. Adhesives can be made using a wide variety of thermoplastic and thermosetting polymers, such as polyvinyl alcohols, 8 polyester resins, 9 epoxy resins, 10 acrylic esters, 11 and polyurethanes. 12 Thermosetting adhesives usually have superior rigidity, solvent resistance, and thermal stability compared to thermoplastic adhesives due to the formation of highly stable crosslinked 3D networks.…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Photoreversible Adhesives Derived from Coumarin-Functionalized Epoxy Soybean Oil

Boga

Patti

Warner

et al. 2023

ACS Appl. Polym. Mater.

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The increasing demand for high-performance thermosetting adhesive materials is causing the continuous depletion of fossil reserves and has led to environmental pollution by accumulating recalcitrant plastic waste as thermosetting polymer networks are hard to recycle or reuse. This is particularly true in the case of their use as adhesives, where not only can a crosslinked adhesive not be recovered but multi-material components and devices can be difficult to readily separate, making reuse and recycling complex. Bio-based feedstocks and reusable polymeric materials can start to address these issues and reduce their environmental impact. In this work, we developed sustainable green adhesives which are reversible in architecture (changing from thermoset to non-crosslinked material) by combining bio-renewable epoxidized soybean oil (ESO) and non-toxic coumarins, which can readily undergo reversible [2 + 2] cycloaddition reaction under the appropriate wavelength of UV light. A series of coumarin-modified ESO materials were synthesized and chemically characterized by 1H NMR, 13C NMR, Fourier-transform infrared (FTIR) spectroscopy, and gel permeation chromatography. The extent and kinetics of the polymerization of all systems were monitored and calculated using UV–visible spectroscopy. The photoreversibility of these synthesized polymer networks was also chemically investigated and quantified with UV–visible spectroscopy and FTIR techniques. The physical properties of the materials were tested as well as their ability to heal defects such as scratches on the surface when stimulated by the appropriate UV light. Systems with a more flexible coumarin arm showed a superior adhesion strength with a measurable lap shear strength of 3.1 MPa with a minimum of 0.045 J cm–2 dose of 365 nm UV irradiation and with an excellent reuse efficiency of 94%.

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“…[8][9][10] Owing to optimal adhesion and mechanical properties, UPs could be used to produce protective coatings for metal, wood and stone surfaces against atmospheric agents. 11,12 Although UP resins include various applications because of being economical and better functionality than some resins, there are some working flaws in these resins that make them limited to be used as structural substances. One of the flaws is degradation open to UV rays.…”

Section: Introductionmentioning

confidence: 99%

Green fluorescent unsaturated polyester/graphitic carbon nitride quantum dots nanocomposites: Preparation and study of UV-resistance, mechanical and viscoelastic properties

Madhi

2023

Journal of Composite Materials

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The present study has been conducted to investigate the protective effect of graphitic carbon nitride quantum dots (CNQDs) against high energetic and harmful ultraviolet (UV) rays in addition to strengthening impact of CNQDs over mechanical and viscoelastic properties of unsaturated polyester (UP). To achieve this purpose, CNQDs were synthesized using citric acid and extra urea via microwave-assisted method. Afterwards, several percentages of CNQDs (0.25, 0.5 and 0.75 wt%) were added to UP and after curing process, UP/CNQDs nanocomposites were obtained with different percentages. By certain microscopic and spectroscopic tests, correctness of CNQDs formation and various features of UP/CNQDs nanocomposites were examined. Adding CNQDs to the matrix of polyester resin allowed creation of nanocomposites with fluorescence emission ability, also blockage of UV rays by the strengthened samples. Strengthening UP by CNQDs resulted in growth of thermal stability, improvement of tensile strength, 10%–15% increase in flexibility, and progress in viscoelastic characteristics including storage modulus, Tg and cross-linking density.

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Unsaturated Polyester Resin as a Nonformaldehyde Adhesive Used in Bamboo Particle Boards

Cited by 12 publications

References 37 publications

Synthesis of Fully Biomass High-Performance Wood Adhesives from Xylitol and Maleic Anhydride

Synthesis of Fully Biomass High-Performance Wood Adhesives from Xylitol and Maleic Anhydride

Eco-Friendly Photoreversible Adhesives Derived from Coumarin-Functionalized Epoxy Soybean Oil

Green fluorescent unsaturated polyester/graphitic carbon nitride quantum dots nanocomposites: Preparation and study of UV-resistance, mechanical and viscoelastic properties

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