Effects of physical treatment of wood fibres on fibre morphology and biocomposite properties

Peltola, Heidi; Laatikainen, Elina; Jetsu, Petri

doi:10.1179/174328911x12988622801016

Cited by 27 publications

(21 citation statements)

References 4 publications

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“…There are evidence in the literature that lignin might act as a compatibilizer between cellulosic fibers and PLA, 51,52 but for this to be effective, lignin needs to be located on the fiber surface. There are evidence in the literature that lignin might act as a compatibilizer between cellulosic fibers and PLA, 51,52 but for this to be effective, lignin needs to be located on the fiber surface.…”

Section: Fiber Propertiesmentioning

confidence: 99%

Influence of pulp bleaching and compatibilizer selection on performance of pulp fiber reinforced PLA biocomposites

Peltola

Immonen

Johansson

et al. 2019

J of Applied Polymer Sci

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This article focuses on the effect of pulp bleaching and emerging commercial compatibilizers on physical performance of pulp fiber reinforced poly(lactic acid) (PLA) biocomposites. Industrially bleached and unbleached hardwood kraft pulp fibers are treated with several additive types, and compounded with PLA to fiber content of 30 wt %. After injection molding, the produced biocomposites are evaluated by their mechanical performance and fiber-matrix adhesion. For selected materials, fiber surface and fiber properties are reflected to composite performance by analyzing the compositions, dimensions, and lignin coverage of original fibers, as well as fiber dispersion and dimensions after melt processing. As a conclusion, unbleached kraft pulp fibers provide significant improvement in physical properties of PLA/pulp fiber composites. Of the screened compatibilizers, epoxidated linseed oil has a clear positive effect on performance when bleached kraft pulp fibers are used. The improvements correspond to enhanced fiber-matrix adhesion and differences in remaining fiber length distributions.

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Section: Fiber Propertiesmentioning

confidence: 99%

Influence of pulp bleaching and compatibilizer selection on performance of pulp fiber reinforced PLA biocomposites

Peltola

Immonen

Johansson

et al. 2019

J of Applied Polymer Sci

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“…A significant fiber length reduction was observed when pelletizers were used as compaction technology . In several investigations in which continuous compounding processes and injection molding were used significant fiber length reduction was determined, independent from the processing conditions, fiber loading, and kind of polymer. Thermo‐degradation, leading to the darkening of the fibers, occurred with increasing mixing time and increasing shear forces due to, that is, high viscosity polymers …”

Section: Methodsmentioning

confidence: 99%

The utilization of thermomechanical pulp fibers in WPC: A review

Mertens¹,

Gurr²,

Krause³

2017

J of Applied Polymer Sci

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Thermomechanical pulp (TMP), among other natural fibers, features characteristics that make it a promising candidate for the utilization in polymer composites. This review is providing an overview on the current state of research on TMP reinforced polymer composites. More than 50 references were reviewed. The cited literature is catalogued according to pretreatments, batch or continuous procedures, processing at laboratory or industrial scale, fiber contents, polymer types, coupling agents as well as wood species. The reinforcing potential of TMP utilized in composites is demonstrated. Tensile strength was found to be peaking at a fiber content of around 40 wt %. Fiber morphology is presumed to be an important determinator for composite properties. Specific mechanical energy [kWh/kg] is presented as an indicator suitable to compare the influence of various processes on fiber morphology. Furthermore, the feed-in and dosing issue that generally accompanies the utilization of cellulosic fibers is described and possible solutions are discussed.

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“…However, they also have some drawbacks such as moisture absorption, quality variation, low thermal stability, and poor compatibility with hydrophobic polymer matrices, which lead to composites with undesirable properties. Nevertheless, these undesirable properties can be improved by physical and chemical treatments such as surface modification using coupling agents [18,19]. Silanization is one of the most common chemical coupling methods used for cellulose-filled composites.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Poly(butylene succinate) Composites Reinforced by Cotton Fiber with Silane Coupling Agent

et al. 2013

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In this study, the use of cotton fiber (CF) as a filler in poly(butylene succinate) (PBS) and the effect of silane treatment on the mechanical properties, thermal stability, and biodegradability of PBS/CF composites are investigated. The results showed that the tensile strength of PBS was improved (15%–78%) with the incorporation of CF (10–40 wt%) and was further increased (25%–118%) when CF was treated with a silane coupling agent. Scanning electron microscopy (SEM) observation of the fracture surfaces of PBS/CF composites showed that there was slight improvement in fiber-matrix compatibility. Thermogravimetric (TG) analysis showed that the thermal stability of the composites was lower than that of neat PBS and decreased with increasing filler loading. The biobased carbon content of the composites increased with increasing CF content. The incorporation of CF (with and without silane treatment) in PBS significantly increased the biodegradation rate of the composites

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Effects of physical treatment of wood fibres on fibre morphology and biocomposite properties

Cited by 27 publications

References 4 publications

Influence of pulp bleaching and compatibilizer selection on performance of pulp fiber reinforced PLA biocomposites

Influence of pulp bleaching and compatibilizer selection on performance of pulp fiber reinforced PLA biocomposites

The utilization of thermomechanical pulp fibers in WPC: A review

Biodegradable Poly(butylene succinate) Composites Reinforced by Cotton Fiber with Silane Coupling Agent

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