Valorization of bark to natural lubrication additives via fractionation based on chemical product engineering concept

Cao, Danyang; Zhang, Jie; Nie, Yuxiang; Wang, Shanshan; Feng, Xinliang; Zhu, Jiahua; Lü, Xiaohua; Mu, Liwen

doi:10.1016/j.ces.2022.118288

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…However, the lignin found in wood flour normally originates from the plant's woody portion, and the composition of this substance varies depending on the type of wood [25]. Bark frequently has higher concentrations of extractives than wood grain, such as tannins and resins [26]. Furthermore, differences in the arrangement of phenolic chemicals and links within the chemical structure of lignin in bark may have an impact on the reactivity and characteristics of this material [27].…”

Section: Introductionmentioning

confidence: 99%

Properties of Bark Particleboard Bonded with Demethylated Lignin Adhesives Derived from <i>Leucaena leucocephala</i> Bark

Salim,

Asik,

Sarjadi

2024

JRM

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Lignin extraction from bark can maximize the utilization of biomass waste, offer cost-effectiveness, and promote environmental friendliness when employed as an adhesive material in bark particleboard production. Particles of fine (0.2 to 1.0 mm), medium (1.0 to 2.5 mm), and coarse (2.5 to 12.0 mm) sizes, derived from the bark of Leucaena leucocephala, were hot-pressed using a heating plate at 175°C for 7 min to create single-layer particleboards measuring 320 mm × 320 mm × 10 mm, targeting a density of 700 kg/m 3 . Subsequently, the samples were trimmed and conditioned at 20°C and 65% relative humidity. In this study, we compared bark particleboard bonded with urea formaldehyde (UF) adhesive to fine-sized particleboard bonded with demethylated lignin adhesive. The results indicated that bark particleboards utilizing demethylated lignin and UF adhesives exhibited similar qualities. Coarse particleboard showed differences in modulus of elasticity (MOE) and modulus of rupture (MOR), while medium-sized particles exhibited significant variations in moisture content (MC) and water absorption (WA). Furthermore, the thickness swelling of coarse and medium-sized particles under wet and oven-dried conditions exhibited notable distinctions. Overall, the demethylated lignin adhesive extracted from L. leucocephala bark demonstrated similar quality to UF adhesive, with particle size correlating inversely to the strength of the bark particleboard. KEYWORDSBark particleboard properties; demethylated lignin; lignin adhesives; Leucaena leucocephala; bark particles Nomenclature UF Urea formaldehyde MOE Modulus of elasticity MOR Modulus of rupture MC Moisture content TS Thickness swelling TS-Wet Thickness swelling from wet to oven dry conditions. TS-AD Thickness swelling from air-dry to oven dry conditions. IB Internal bonding

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Section: Introductionmentioning

confidence: 99%

Properties of Bark Particleboard Bonded with Demethylated Lignin Adhesives Derived from <i>Leucaena leucocephala</i> Bark

Salim,

Asik,

Sarjadi

2024

JRM

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“…[26][27][28] Catalytic fractionation of bark has been reported only for hardwoods. [29][30][31][32][33] Less research has been performed on softwood bark, with reports only on fractionation (Figure . 1) 34,35 or catalysis of isolated fractions. 36 Catalytic depolymerization of lignin, within ´lignin-rst´, targets the β-ether units by cleaving C-O bonds.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Valorization of Spruce Bark to Yield Vanillin

Samec,

Muangmeesri,

Lebedeva

et al. 2024

Preprint

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A competitive and environmentally sustainable biorefinery should valorize all parts of biomass, including bark. Currently, bark, which constitutes 10 wt% of timber and pulp wood, is burned at a low value. Softwood bark comprises 38% lignin, suggesting that this component could be an important source of valuable aromatic compounds; this lignin also contains substantial amounts of interlinkages with strong C–C bonds, such as β-5 linkages, which are not cleaved during standard depolymerization methods. In contrast to wood lignin which is linear, bark lignin appears to be cyclic, which further hinders depolymerization. Here, we present a method using oxygen to oxidatively depolymerize spruce bark lignin to yield valuable monophenols at 30-fold higher levels than expected from nitrobenzene oxidation. This is an important step in making biorefineries more sustainable and competitive and a new source to green vanillin.

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Tribological properties of matrine in soybean oil as additive

Jiang,

Wang,

et al. 2024

Materials Letters

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Valorization of bark to natural lubrication additives via fractionation based on chemical product engineering concept

Cited by 3 publications

References 46 publications

Properties of Bark Particleboard Bonded with Demethylated Lignin Adhesives Derived from <i>Leucaena leucocephala</i> Bark

Properties of Bark Particleboard Bonded with Demethylated Lignin Adhesives Derived from <i>Leucaena leucocephala</i> Bark

Oxidative Valorization of Spruce Bark to Yield Vanillin

Tribological properties of matrine in soybean oil as additive

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