Curing characteristics of low molecular weight melamine-urea–formaldehyde (MUF) resin-impregnated poplar wood

Li, Zhonghao; Zhang, Xiaomeng; Song, Shasha; Xu, Kang; Lyu, Jianxiong; Li, Xianjun

doi:10.1016/j.conbuildmat.2022.126814

Cited by 14 publications

(4 citation statements)

References 35 publications

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“…Such wood plastic composites show poor conversion rate, high cost and poor interfacial compatibility due to their volatility and low polarity, which restrict the practical application of vinyl monomer modification. Meanwhile, another corresponding widely explored resin system is the aqueous aldehyde oligomers system, including phenol-formaldehyde (PF) resin, urea-formaldehyde resin and melamine-formaldehyde resin [ 11 , 12 , 13 , 14 , 15 ]. These oligomers formed crosslinked solid polymer networks through condensation polymerization with water as the carrier.…”

Section: Introductionmentioning

confidence: 99%

Epoxy-Acrylic Polymer In-Situ Filling Cell Lumen and Bonding Cell Wall for Wood Reinforcement and Stabilization

Liu,

Fan,

Yao

et al. 2024

Polymers

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Under a global carbon-neutralizing environment, renewable wood is a viable alternative to non-renewable resources due to its abundance and high specific strength. However, fast-growing wood is hard to be applied extensively due to low mechanical strength and poor dimensional stability and durability. In this study, epoxy-acrylic resin-modified wood was prepared by forming a functional monomer system with three monomers [glycidyl methacrylate (GMA), maleic anhydride (MAN), and polyethylene glycol-200-dimethylacrylic acid (PEGDMA)] and filling into the wood cell cavity. The results showed that in the case of an optimal monomer system of nGMA:nPEGDMA = 20:1 and an optimal MAN dosage of 6%, the conversion rate of monomers reached 98.01%, the cell cavity was evenly filled by the polymer, with the cell wall chemically bonded. Thus, a bonding strength of as high as 1.13 MPa, a bending strength of 112.6 MPa and an impact toughness of 74.85 KJ/m2 were applied to the modified wood, which presented excellent dimensional stability (720 h water absorption: 26%, and volume expansion ratio: 5.04%) and rot resistance (loss rates from white rot and brown rot: 3.05% and 0.67%). Additionally, polymer-modified wood also exhibited excellent wear resistance and heat stability. This study reports a novel approach for building new environmentally friendly wood with high strength and toughness and good structural stability and durability.

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Section: Introductionmentioning

confidence: 99%

Epoxy-Acrylic Polymer In-Situ Filling Cell Lumen and Bonding Cell Wall for Wood Reinforcement and Stabilization

Liu,

Fan,

Yao

et al. 2024

Polymers

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“…Among them are methods for creating a superhydrophobic coating on a wood surface with more than 150° water contact angle and less than 10° slip angles (Janesch et al, 2020;Pfeffer et al, 2012;Zhangheng Wang et al, 2022;Yang et al, 2022). Applying impregnation with urea-formaldehyde, phenol-formaldehyde, melamine-formaldehyde thermosetting resins (Altgen et al, 2023;Boneka et al, 2021;Dorieh et al, 2022;Li et al, 2022). The use of paraffin and wax impregnation methods (Brischke and Melcher, 2015;Liu et al, 2018Liu et al, , 2019Niu and Song 2021;Scholz et al 2010;Wang et al 2020).…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Improving the Performance Properties of Impregnated Wood with its Subsequent Utilization into a Biochar Sorbent

Zhuzhukin,

Tomina,

Ponomarev

et al. 2023

Floresta Ambient.

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Wood is a common natural polymeric material with hydrophilicity and low biostability with a limited service life. The article considers the issue of using a multicomponent composition (used motor oil, rosin, paraffin) for impregnating birch wood and giving it increased water resistance, bio-and dimensional stability. The possibility of recycling the used impregnated wood to obtain a biochar adsorbent was shown. The impregnating composition was characterized by the FTIR method to assess the possibility of interaction between the functional groups of the impregnating composition and wood. Moisture and water absorption decreased by more than 4 and 6 times. Volumetric swelling decreased by 57% relative to untreated wood, the effectiveness against swelling after 30 days was 46%. The high efficiency of the impregnating composition against the wood biodegradation has been established. The method of micro-X-ray tomography determined a high degree of filling of the anatomical structures of wood.

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“…Resin impregnation of wood as one of the chemical treatment methods has the advantage of simplified procedure and low toxic resins. The procedures that have been generally used so far are mainly ureaformaldehyde resin [9], phenolic resin [10], and some synthetic resins [11][12][13]. However, despite excellent performance in wood treatment, most of these resins are derived from petroleum-based chemicals, which are non-renewable.…”

Section: Introductionmentioning

confidence: 99%

Preparation Optimization of Enhanced Poplar Wood by Organic–Inorganic Hybrid Treatment via Response Surface Methodology

Wang,

He,

Deng

et al. 2023

Materials

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In this work, a strategy for hybrid treatment was proposed, aiming to present a hybrid impregnation agent including lignin-derived resin (LR) and surface-modified montmorillonite (GMMT) to treat fast-growing poplar wood. The treating agents could penetrate the wood, fill the cavities of the wood interior, and strengthen the cell wall structure. The optimal WPG of 36.2% was obtained upon the response surface methodology (RSM) at the conditions of 34% LR, 1.8% GMMT, 1.2 MPa impregnation pressure, and 99 min impregnation time. The density, water uptake (WU), modulus of rupture (MOR), modulus of elasticity (MOE), and compressive strength (CS) of the samples were tested to evaluate the enhancement of the physical and mechanical properties. In addition, these samples were investigated via cone calorimeter (CONE), Fourier Transform Infrared spectrometer (FTIR), and X-ray diffraction (XRD). The results showed that the density of the treated samples increased significantly up to 0.72 g/cm3. Compared with 134.8% of the control, the WU of the treated wood sample could decrease to 60.3%. In addition, the MOR and MOE of the resulting samples reached up to 131.8 MPa and 18.14 GPa, respectively, which were 62.3% and 77.7% higher than the control. Notably, the CS was 84.7 MPa with an increase of up to 94.7%. Moreover, the peak heat release rate (HRR) of the treated sample was obviously reduced to 231.33 kW/m2, a decrease of 17.5% compared to the control (271.71 kW/m2).

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Curing characteristics of low molecular weight melamine-urea–formaldehyde (MUF) resin-impregnated poplar wood

Cited by 14 publications

References 35 publications

Epoxy-Acrylic Polymer In-Situ Filling Cell Lumen and Bonding Cell Wall for Wood Reinforcement and Stabilization

Epoxy-Acrylic Polymer In-Situ Filling Cell Lumen and Bonding Cell Wall for Wood Reinforcement and Stabilization

Improving the Performance Properties of Impregnated Wood with its Subsequent Utilization into a Biochar Sorbent

Preparation Optimization of Enhanced Poplar Wood by Organic–Inorganic Hybrid Treatment via Response Surface Methodology

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