Wheat straw lignin as filler for rigid polyurethane foams on the basis of tall oil amide

Paberza, Aiga; Cābulis, Uģis; Arshanitsa, Alexandr

doi:10.14314/polimery.2014.477

Cited by 30 publications

(24 citation statements)

References 5 publications

(4 reference statements)

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“…PU composite foams with enhanced mechanical properties, reduced water uptake, and greater dimensional stability were obtained. Paberza et al [34] synthesized PU composite foams enhanced with wheat straw lignin at different concentrations (0-6.3 wt%). Improved thermal insulation properties were obtained for PU composites containing 3 wt% of the filler.…”

Section: Introductionmentioning

confidence: 99%

Bio-Based Polyurethane Composite Foams with Improved Mechanical, Thermal, and Antibacterial Properties

et al. 2020

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Among different organic fillers, the chemical composition of Syzygium aromaticum, commonly known as cloves, has great potential as a sustainable reinforcement for polymeric materials. In the study, grounded cloves were used as cellulosic filler for a novel polyurethane (PU) composite foams. Soybean oil-based PU composite foams were successfully reinforced with different concentrations (1, 2, and 5 wt%) of clove filler. PU foams were examined by rheological behavior, processing parameters, cellular structure (scanning electron microscopy analysis), mechanical properties (compression test, impact test, three-point bending test), thermal properties (thermogravimetric analysis), viscoelastic behavior (dynamic mechanical analysis) as well as selected application properties (apparent density, dimensional stability, surface hydrophobicity, water absorption, color characteristic). In order to undertake the disc diffusion method, all PU composites were tested against selected bacteria (Escherichia coli and Staphylococcus aureus). Based on the results, it can be concluded that the addition of 1 and 2 wt% of clove filler leads to PU composite foams with improved compression strength (improvement by ≈18% for sample PU-1), greater flexural strength (increase of ≈11%), and improved impact strength (increase of ≈8%). Moreover, it has been proved that clove filler may be used as a natural anti-aging compound for polymeric materials. Based on the antibacterial results, it has been shown that the addition of clove filler significantly improved the antibacterial properties of PU foams and is suitable for the manufacturing of antimicrobial PU composite foams. Due to these positive and beneficial effects, it can be stated that the use of cloves as a natural filler in PU composite foams can promote a new application path in converting agricultural waste into useful resources for creating a new class of green materials.

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Section: Introductionmentioning

confidence: 99%

Bio-Based Polyurethane Composite Foams with Improved Mechanical, Thermal, and Antibacterial Properties

et al. 2020

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“…In order to reduce the consumption of petrochemical components in the synthesis of polyurethanes, both plant and waste fillers are also introduced. The literature describes the influence of such waste as rapeseed cake [ 3 ], basalt powder [ 4 ], thermoset polyester-glass fiber composite [ 5 ], eggshells [ 6 ], wheat straw lignin [ 7 ], brewers’ spent grain and ground tire rubber [ 8 ], buffing dust generated in leather industry [ 9 ] on the properties of polyurethane foams. Most results confirm that waste fillers can be successfully used as low-cost and environmentally friendly components for PUR foam modification.…”

Section: Introductionmentioning

confidence: 99%

Implementation of Circular Economy Principles in the Synthesis of Polyurethane Foams

et al. 2020

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The main strategy of the European Commission in the field of the building industry assumes a reduction of greenhouse gas emissions by up to 20% by 2020 and by up to 80% by 2050. In order to meet these conditions, it is necessary to develop not only efficient thermal insulation materials, but also more environmentally friendly ones. This paper describes an experiment in which two types of bio-polyols were obtained using transesterification of used cooking oil with triethanolamine (UCO_TEA) and diethylene glycol (UCO_DEG). The bio-polyols were next used to prepare low-density rigid polyurethane (PUR) foams. It was found that the bio-polyols increased the reactivity of the PUR systems, regardless of their chemical structures. The reactivity of the system modified with 60% of the diethylene glycol-based bio-polyol was higher than in the case of the reference system. The bio-foams exhibited apparent densities of 41–45 kg/m3, homogeneous cellular structures and advantageous values of the coefficient of thermal conductivity. It was observed that the higher functionality of bio-polyol UCO_TEA compared with UCO_DEG had a beneficial effect on the mechanical and thermal properties of the bio-foams. The most promising results were obtained in the case of the foams modified in 60% with the bio-polyol based on triethanoloamine. In conclusion, this approach, utilizing used cooking oil in the synthesis of high-value thermal insulating materials, provides a sustainable municipal waste recycling solution.

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“…Research institutions and industry undertake efforts to make chemical production more eco-friendly and to replace fossil raw materials with renewable feedstock [1]. More and more research concerns modification of polymers with waste [2][3][4][5][6]. Among the renewable raw materials, vegetable oils are the most widely used in the synthesis of different chemicals, which could be applied by the polymer industry [7,8].…”

Section: Introductionmentioning

confidence: 99%

Influence of Chemical Structure of Petrochemical Polyol on Properties of Bio-polyurethane Foams

Prociak

Szczepkowski²,

Ryszkowska

et al. 2019

J Polym Environ

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In this study, the influence of the chemical structures of petrochemical polyols on the foaming process of polyurethane compositions as well as on selected properties of the foams obtained has been investigated. Two types of petrochemical polyols were used-polyester and polyether polyols as well as their blends with a rapeseed oil-based polyol. Dielectric polarization, temperature and expansion velocity were determined during the foaming process of the polyurethane systems with different polyol components. The results show the highest reactivity of the polyester polyol and a decrease of the polyurethane system's reactivity as a result of a partial replacement of the petrochemical polyol with the bio-based polyol. The content of the closed cells in the materials obtained strongly depends on the petrochemical polyol used. The results indicate that the chemical structure of the petrochemical polyol had a significant effect on the cellular structure as well as the physicalmechanical properties of the final products. A significant worsening of the foams' mechanical properties was observed as an effect of a partial replacement of the polyester polyol with the rapeseed oil-based polyol. In contrast, a partial replacement of the polyether polyol caused an improvement of the cell structure keeping the mechanical properties of the modified foams at the same level.

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Wheat straw lignin as filler for rigid polyurethane foams on the basis of tall oil amide

Cited by 30 publications

References 5 publications

Bio-Based Polyurethane Composite Foams with Improved Mechanical, Thermal, and Antibacterial Properties

Bio-Based Polyurethane Composite Foams with Improved Mechanical, Thermal, and Antibacterial Properties

Implementation of Circular Economy Principles in the Synthesis of Polyurethane Foams

Influence of Chemical Structure of Petrochemical Polyol on Properties of Bio-polyurethane Foams

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