Wood-plastic composites based on HDPE and ionic liquid additives

Croitoru, Cătălin; Varodi, Anca Maria; Timar, Maria Cristina; Roată, Ionuţ Claudiu; Stanciu, Elena Manuela; Pascu, Alexandru

doi:10.1007/s10853-017-1826-7

Cited by 19 publications

(16 citation statements)

References 38 publications

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“…Small 1–3 μm pores, generated by the poorly connected interfaces of the fillers could be also observed in the microstructure of P4 composite. It could be noted that in the case of composites P1, P2, and P3, the polymer matrix forms a mesh‐like structure, indicating a dominatingly plastic deformation mechanism, documented also in other studies on semicrystalline polymers . This behavior determines improved mechanical properties of the P1–P3 composites in contrast with P0 (smoother surface‐brittle behavior), confirmed by the results of the mechanical analysis.…”

Section: Resultssupporting

confidence: 80%

Calcium carbonate and wood reinforced hybrid PVC composites

Croitoru

Spirchez

Cristea

et al. 2018

J of Applied Polymer Sci

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In this article, poly(vinyl chloride) (PVC) sandwich-structured hybrid composites with amorphous calcium carbonate and wood-filled cores were obtained by compression molding. It has been determined that wood addition up to a weight ratio of 33% reported to the total filler amount is beneficial in improving both the inter-filler and filler-matrix interfacial adhesion, which alongside with the promoting of the amorphous PVC matrix crystallization is responsible for an increase up to 34% in the flexural strength of the composites, compared to unfilled PVC. The hybrid filled composites present up to 35% lower friction coefficients and up to 20% higher Brinell hardness values than the composites filled with calcium carbonate alone. Subsequently, wood addition determines an increase in the oxidation onset temperature for PVC and an increase with up to 20% in the sound and thermal-insulative properties of the composites, compared to unfilled PVC. The dominating dispersive part of the composites surface energy aids in improving the mass and dimensional stability of the assembly to both water and dilute hydrochloric acid aqueous solutions. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46317.

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Section: Resultssupporting

confidence: 80%

Calcium carbonate and wood reinforced hybrid PVC composites

Croitoru

Spirchez

Cristea

et al. 2018

J of Applied Polymer Sci

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“…Composites containing wood were characterized with slightly higher values of tensile strength and elastic modulus than matrix. This strengthening effect observed for samples with ionic liquid treated wood may be attributed to better adhesion between components of the composite (Croitoru et al 2018). The increased adhesion, enabling more efficient stress transfer in composite system, is most likely a result of increased wettability of the wood fibers.…”

Section: Effect Of Treatment On the Mechanical Propertiesmentioning

confidence: 93%

The effect of chemical modification of wood in ionic liquids on the supermolecular structure and mechanical properties of wood/polypropylene composites

et al. 2018

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Effects of chemical modification of wood with innovative ionic liquid on the supermolecular and morphology of wood/polypropylene composites were investigated using X-ray diffraction, hot stage optical microscopy, and differential scanning calorimetry. For the first time the chemical treatment of wood was conducted solely with newly synthesized ionic liquid, didecyldimethylammonium bis(trifluoromethylsulfonyl)imide. The modification was found to be responsible for significant changes in nucleating abilities of wood in polypropylene matrix. These findings were confirmed by crystallization temperature, crystal conversion, crystallization half-time parameters, as well as observation of transcrystalline structures. Ionic liquid treatment of wood influenced also formation of polymorphic forms of polymer matrix. In contrast to composites with untreated wood, in composites with modified wood filler formation of b-phase of polypropylene was observed. This fact was discussed in view of differences in nucleating activity of lignocellulosic filler, resulting from chemical treatment with ionic liquid. Moreover, a relationship between mechanical properties of composites and the phenomena taking place at the polymer-filler interface, controlled by chemical modifications of lignocellulosic components, was evaluated.

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“…Anions with a basic Lewis character such as carboxylates, bis (trifluoromethylsulfonyl)imide or bis (2,4,4-trimethylpentyl) phosphinate could possess a higher susceptibility for interaction with the fungal cell wall, with fungal proteins, or with the ions involved in the non-specific or enzymatic wood degradation step (Fe 2+ , Mn 2+ ) [ 116 , 117 , 118 ].…”

Section: Antifungal Character Of Ionic Liquidsmentioning

confidence: 99%

“…The ionic liquids methyltrioctylammonium bis (trifluoromethylsulfonyl)imide ( Figure 5 f) and trihexyltetradecylphosphonium bis (2,4,4-trimethylpentyl) phosphinate ( Figure 5 g) can completely inhibit the development of Postia Placenta (brown rot) inoculum after three days of exposure. It can be used as a preservative either for wood alone or for wood composites [ 117 ].…”

Section: Antifungal Character Of Ionic Liquidsmentioning

confidence: 99%

Ionic Liquids as Antifungal Agents for Wood Preservation

Croitoru

Roată

2020

Molecules

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Ionic liquids represent a class of highly versatile organic compounds used extensively in the last decade for lignocellulose biomass fractionation and dissolution, as well as property modifiers for wood materials. This review is dedicated to the use of ionic liquids as antifungal agents for wood preservation. Wood preservation against fungal attack represents a relatively new domain of application for ionic liquids, emerging in the late 1990s. Comparing to other application domains of ionic liquids, this particular one has been relatively little researched. Ionic liquids may be promising as wood preservatives due to their ability to swell wood, which translates into better penetration ability and fixation into the bulk of the wood material than other conventional antifungal agents, avoiding leaching over time. The antifungal character of ionic liquids depends on the nature of their alkyl-substituted cation, on the size and position of their substituents, and of their anion. It pertains to a large variety of wood-colonizing fungi, both Basidiomycetes and Fungiimperfecti.

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Wood-plastic composites based on HDPE and ionic liquid additives

Cited by 19 publications

References 38 publications

Calcium carbonate and wood reinforced hybrid PVC composites

Calcium carbonate and wood reinforced hybrid PVC composites

The effect of chemical modification of wood in ionic liquids on the supermolecular structure and mechanical properties of wood/polypropylene composites

Ionic Liquids as Antifungal Agents for Wood Preservation

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