Organosolv Lignin for Non-Isocyanate Based Polyurethanes (NIPU) as Wood Adhesive

Saražin, Jaša; Pizzi, A.; Amirou, Siham; Schmiedl, Detlef; Šernek, Milan

doi:10.32604/jrm.2021.015047

Cited by 47 publications

(53 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This might be attributed to the greater moisture content of the wood fibers caused by the increased ALS content, which led to reduced bonds between the lignosulfonate and hardwood fibers for the conditions used in the experiment (press factor of 15 s·mm −1 ). The WA values obtained were significantly better in comparison with previous studies on the use of lignosulfonates as bio-based, formaldehyde-free wood adhesives [ 66 , 67 , 68 , 69 , 70 , 71 , 97 , 98 , 99 ].…”

Section: Resultscontrasting

confidence: 58%

“…Successful attempts have been made to develop eco-friendly wood panels bonded with sustainable “green” adhesives based on modified tannins [ 55 , 56 , 57 ], soy [ 58 , 59 , 60 ], starch [ 61 , 62 ], and lignin [ 63 , 64 , 65 , 66 , 67 , 68 , 69 ]. A common disadvantage of all bio-based binders is the need to apply extended press times and the deteriorated dimensional stability of the ready panels [ 70 , 71 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Properties of High-Density Fiberboard Bonded with Urea–Formaldehyde Resin and Ammonium Lignosulfonate as a Bio-Based Additive

et al. 2021

Self Cite

View full text Add to dashboard Cite

The potential of ammonium lignosulfonate (ALS) as an eco-friendly additive to urea–formaldehyde (UF) resin for manufacturing high-density fiberboard (HDF) panels with acceptable properties and low free formaldehyde emission was investigated in this work. The HDF panels were manufactured in the laboratory with very low UF resin content (4%) and ALS addition levels varying from 4% to 8% based on the mass of the dry wood fibers. The press factor applied was 15 s·mm−1. The physical properties (water absorption and thickness swelling), mechanical properties (bending strength, modulus of elasticity, and internal bond strength), and free formaldehyde emission were evaluated in accordance with the European standards. In general, the developed HDF panels exhibited acceptable physical and mechanical properties, fulfilling the standard requirements for HDF panels for use in load-bearing applications. Markedly, the laboratory-produced panels had low free formaldehyde emission ranging from 2.0 to 1.4 mg/100 g, thus fulfilling the requirements of the E0 and super E0 emission grades and confirming the positive effect of ALS as a formaldehyde scavenger. The thermal analyses performed, i.e., differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and derivative thermogravimetry (DTG), also confirmed the main findings of the research. It was concluded that ALS as a bio-based, formaldehyde-free adhesive can be efficiently utilized as an eco-friendly additive to UF adhesive formulations for manufacturing wood-based panels under industrial conditions.

show abstract

Section: Resultscontrasting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Properties of High-Density Fiberboard Bonded with Urea–Formaldehyde Resin and Ammonium Lignosulfonate as a Bio-Based Additive

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Lignin is a polyaromatic macromolecule acting as the natural binder in wood [40][41][42]. It is also the second most abundant organic polymer in the world, surpassed only by cellulose [43,44].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Hot-Pressing Regime in the Production of Eco-Friendly Fibreboards Bonded with Hydrolysis Lignin

Valchev

Yordanov

Savov

et al. 2021

Period. Polytech. Chem. Eng.

View full text Add to dashboard Cite

This research was aimed at studying the potential of using residual lignin from acid hydrolysis as a binder in manufacturing eco-friendly, dry-process fibreboards. For that purpose, a modification of the adhesive system and hot-pressing regime was conducted. The adhesive system applied was composed of 2 % phenol-formaldehyde (PF) resin and 10 % hydrolysis lignin (based on the dry fibres). The PF resin does not only act as a binder but generally contributes to the even distribution and good retention of the main binder – hydrolysis lignin. A specific hot-pressing cycle was used. In the first stage, the pressure was 1.0 MPa, followed by an increased pressure of 4.0 MPa, and subsequent cooling. The purpose of the initial lower pressure was softening the lignin and reduction of the material moisture content. The effect of the second stage of hot-pressing on the properties of eco-friendly fibreboards was investigated. It was determined that the fibreboards produced with 2 % PF resin and 10 % hydrolysis lignin have similar physical and mechanical properties to those of the control panels, produced with 10 % PF resin at a standard hot-pressing cycle. The findings of this work demonstrate that residual hydrolysis lignin can be effectively utilized as a binder in the production of eco-friendly, dry-process fibreboards with acceptable physical and mechanical properties.

show abstract

“…The definition of recycled wood, as stated in the Waste Framework Directive (2008/98/EC), includes a variety of residual and old wood, such as wastes from construction, furniture, etc., and packaging [3][4][5]. Both wood-based panel industries and pulp and paper facilities produce, annually, a substantial amount of by products, namely solid waste and nonhazardous sludge which require utilization as by-products or as waste materials [6,7].…”

Section: Introductionmentioning

confidence: 99%

Physical and Mechanical Properties of Eco-Friendly Composites Made from Wood Dust and Recycled Polystyrene

Foti¹,

Voulgaridou²,

Karastergiou³

et al. 2022

Journal of Renewable Materials

View full text Add to dashboard Cite

The development of alternative wood composites based on the use of waste or recycled materials can be beneficial due to over exploitation of natural resources. Under this frame, an option for the successful utilization of waste polystyrene which avoids environmental problems that formaldehyde adhesives cause and also reduces waste disposal, is its potential application as a binder for the production of value-added environmentally friendly and low cost wood composites. Two types of panel were successfully made, consisting of wood dust and two recycled polystyrene contents, namely, 15% and 30%. Both physical properties, water absorption and thickness swelling, and mechanical properties, modulus of rupture, shear strength parallel in the plane of the board and glue line shear strength, were significantly improved as the recycled polystyrene content increased from 15% to 30%. Water absorption and thickness swelling after 24 h immersion in water were improved by 165% and 750% as the recycled polystyrene content increased from 15% to 30%. The magnitude of the improvement in mechanical properties however, was less pronounced than of the physical properties since modulus of rupture, shear strength parallel in the plane of the board and glue line shear strength were increased by 43.6%, 50% and 61.5%, respectively. The low viscosity of the recycled polystyrene caused more mobility inside the panel matrix and therefore, an improved penetration took place into adequate depth of the compressed dust particles. It is concluded that boards can be successfully produced using these waste raw materials, wood dust and recycled polystyrene in organic solvent as a binder, and therefore it can reduce waste disposal and provide cleaner production for the development of wood-based boards.

show abstract

Organosolv Lignin for Non-Isocyanate Based Polyurethanes (NIPU) as Wood Adhesive

Cited by 47 publications

References 49 publications

Properties of High-Density Fiberboard Bonded with Urea–Formaldehyde Resin and Ammonium Lignosulfonate as a Bio-Based Additive

Properties of High-Density Fiberboard Bonded with Urea–Formaldehyde Resin and Ammonium Lignosulfonate as a Bio-Based Additive

Optimization of the Hot-Pressing Regime in the Production of Eco-Friendly Fibreboards Bonded with Hydrolysis Lignin

Physical and Mechanical Properties of Eco-Friendly Composites Made from Wood Dust and Recycled Polystyrene

Contact Info

Product

Resources

About