Thermal and mechanical performance of ramie fibers modified with polyurethane resins derived from acacia mangium bark tannin

Aristri, Manggar Arum; Laksana, Raden Permana Budi; Sari, Rita Kartika; Iswanto, Apri Heri; Krišťák, Ľuboš; Antov, Petar; Pizzi, A.

doi:10.1016/j.jmrt.2022.03.131

Cited by 27 publications

(21 citation statements)

References 60 publications

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“…This was probably because LPU resins-L-isolated had lower viscosity than those of LPU resins-L-EtAc and L-EtOH ( Table 5 ). This results were in line with the results of ramie impregnated with tannin-based PU resins for different impregnation times [ 14 ].…”

Section: Resultssupporting

confidence: 89%

“…Many studies have been conducted using bio-polyols derived from renewable and environmentally friendly natural resources. Alternative raw materials for bio-polyols in PU synthesis can be in the form of carbohydrate-based materials, natural phenolic compounds [ 13 , 14 , 15 ], vegetable oils, and lignocellulosic biomass [ 12 , 16 , 17 ], and today, bio-PU derived from renewable materials without the usage of isocyanates has also been created using the same biosourced ingredients [ 18 , 19 , 20 , 21 ]. PUs are used in various fields, such as automotive, building and construction, packaging, and biomedical products [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

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Modification of Ramie Fiber via Impregnation with Low Viscosity Bio-Polyurethane Resins Derived from Lignin

et al. 2022

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The purpose of this study was to prepare low-viscosity lignin-based polyurethane (LPU) resins for the modification of ramie (Boehmeria nivea (L.) Gaudich) fiber via impregnation to improve the fiber’s thermal and mechanical properties. Low-viscosity LPU resins were prepared by dissolving lignin in 20% NaOH and then adding polymeric 4,4-methane diphenyl diisocyanate (pMDI, 31% NCO) with a mole ratio of 0.3 NCO/OH. Ramie fiber was impregnated with LPU in a vacuum chamber equipped with a two-stage vacuum pump. Several techniques such as Fourier-transform infrared (FTIR) spectroscopy, differential scanning calorimetry, thermogravimetric analysis, pyrolysis-gas chromatography–mass spectroscopy, field emission-scanning electron microscopy coupled with energy dispersive X-ray (EDX), and a universal testing machine were used to characterize lignin, LPU, and ramie fiber. The LPU resins had low viscosity ranging from 77 to 317 mPa·s−1. According to FTIR and EDX analysis, urethane bonds were formed during the synthesis of LPU resins and after impregnation into ramie fibers. After impregnation, the reaction between the LPU’s urethane group and the hydroxy group of ramie fiber increased thermal stability by an average of 6% and mechanical properties by an average of 100% compared to the untreated ramie fiber. The highest thermal stability and tensile strength were obtained at ramie impregnated with LPU-ethyl acetate for 30 min, with a residual weight of 22% and tensile strength of 648.7 MPa. This study showed that impregnation with LPU resins can enhance the thermal and mechanical properties of fibers and increase their wider industrial utilization in value-added applications.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Modification of Ramie Fiber via Impregnation with Low Viscosity Bio-Polyurethane Resins Derived from Lignin

et al. 2022

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“…The average viscosity of PU 1.2 is also higher than that of commercial PU (1.0) by 150-250 mPa.s. The average viscosity of PU 1.2, which is higher than commercial, is due to the increase in the molecular weight of the isocyanate (Aristri et al 2022;Lubis et al 2022;Szycher 2012). The graphs in Fig.…”

Section: Characteristics Of Adhesivementioning

confidence: 99%

Physical and Mechanical Properties of Cross-Laminated Timber Made of a Combination of Mangium-Puspa Wood and Polyurethane Adhesive

Hariz

Hadi

Maulana³

et al. 2023

J. Sylva Lestari

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This study aimed to evaluate the physical and mechanical properties of cross-laminated timber (CLT) characteristics from mangium (Acacia mangium) and puspa (Schima wallichii) woods and their combination using polyurethane (PU 1.2) adhesives. The manufacture of CLT began with basic adhesive characterization and thermo-mechanical analysis. Wood material’s physical and chemical properties were also tested with its response to the PU 1.2 wettability. The CLT (100 ´ 30 ´ 3.60) cm3 was manufactured with 160 g/m2 glue spread at a pressure of 0.80 MPa for 200 minutes. The CLT panels were characterized refers to the JAS 3079 standard. The results show that PU 1.2 had a gelatination time of 182.1 minutes at 25°C, was able to form urethane groups, and experienced an increase in storage modulus at 35°C. Mangium and puspa woods have different physical and chemical properties, but they interact similarly with PU 1.2 wettability. Puspa CLT panel has a higher density than mangium but lower dimensional stability. The bending mechanical properties of hybrid puspa-mangium-puspa CLT were able to match puspa CLT and have one sample of shear strength that met the JAS 3079 standard in both grain directions. Therefore, hybrid puspa-mangium-puspa CLT has the potential to be developed to improve its dimensional stability and mechanical properties. Keywords: Acacia mangium, cross-laminated timber, layer combination, polyurethane adhesive, Schima wallichii

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“…To avoid fibre damage, these bundles can either be treated to separate to the necessary diameter or used immediately without separation [ 17 ]. Bio-based polyurethane resin is derived from tannin and black liquor when impregnated into ramie fibre to improve their mechanical and thermal properties, enhancing the ramie fibre’s value in industrial application as a functional material [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Thermal Behaviour of Flax with a Ramie Fibre-Reinforced Polymer Composite

et al. 2023

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Plant-derived fibres, called lignocellulosic fibres, are a natural alternative to synthetic fibres in polymer composite reinforcement. Utilizing renewable resources, such as fibre-reinforced polymeric composites made from plant and animal sources, has become a crucial design requirement for developing and producing parts for all industrial goods. Natural-fibre-based composites are used for door panels, trays, glove boxes, etc. This study involves developing and thermal analysing a flax fibre reinforced with phenol–formaldehyde resin hybridization with ramie fibre by way of a vacuum infusion process. As per ASTM Standard, eight different sequences were fabricated and thermally characterized. In the present study, three stages of weight loss (%) are shown by the thermogravimetric analysis (TGA). The sample loses less weight during the first stage, more during the second, and more during the third. The sample’s overall maximum temperature was recorded at 630 °C. It was discovered that sample D (80.1 °C) had the highest heat deflection temperature, and sample B had the lowest (86.0 °C). Sample C had a low thermal expansion coefficient, while sample G had a high thermal expansion coefficient. Sample E had the highest thermal conductivity, measured at 0.213 W/mK, whereas sample A had the lowest conductivity, at 0.182 W/mK. From the present study, it was found that sample H had better thermal characteristics. The result of the present investigation would generate thermal data regarding hybrid ramie and flax composites, which would be helpful for researchers and practitioners involved in the field of biocomposites.

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Thermal and mechanical performance of ramie fibers modified with polyurethane resins derived from acacia mangium bark tannin

Cited by 27 publications

References 60 publications

Modification of Ramie Fiber via Impregnation with Low Viscosity Bio-Polyurethane Resins Derived from Lignin

Modification of Ramie Fiber via Impregnation with Low Viscosity Bio-Polyurethane Resins Derived from Lignin

Physical and Mechanical Properties of Cross-Laminated Timber Made of a Combination of Mangium-Puspa Wood and Polyurethane Adhesive

Enhancement of Thermal Behaviour of Flax with a Ramie Fibre-Reinforced Polymer Composite

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