Structure–Property Relationship of Biobased Polyurethanes Obtained from Mixture of Naturally Occurring Vegetable Oils

Chethana, M.; Madhukar, B. S.; Siddaramaiah,; Somashekar, R.

doi:10.1002/adv.21390

Cited by 11 publications

(5 citation statements)

References 38 publications

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“…In recent years, the uses of bio-based polyols have been investigated to produce sustainable and eco-friendly rigid polyurethane foams, such as lignin [ 5 , 6 ], biopitch [ 7 , 8 ], glycerol [ 9 , 10 , 11 ], and vegetable oils including castor [ 3 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ], palm [ 20 , 21 ], soybean [ 11 , 22 ] starch [ 23 , 24 ], etc. Castor oil (CO) is a mixture of triglycerides, mainly ricinoleic acid, which is produced from the seed of the Ricinus communis plant.…”

Section: Introductionmentioning

confidence: 99%

Polyurethane Foams for Thermal Insulation Uses Produced from Castor Oil and Crude Glycerol Biopolyols

et al. 2017

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Rigid polyurethane foams were synthesized using a renewable polyol from the simple physical mixture of castor oil and crude glycerol. The effect of the catalyst (DBTDL) content and blowing agents in the foams’ properties were evaluated. The use of physical blowing agents (cyclopentane and n-pentane) allowed foams with smaller cells to be obtained in comparison with the foams produced with a chemical blowing agent (water). The increase of the water content caused a decrease in density, thermal conductivity, compressive strength, and Young’s modulus, which indicates that the increment of CO2 production contributes to the formation of larger cells. Higher amounts of catalyst in the foam formulations caused a slight density decrease and a small increase of thermal conductivity, compressive strength, and Young’s modulus values. These green foams presented properties that indicate a great potential to be used as thermal insulation: density (23–41 kg·m−3), thermal conductivity (0.0128–0.0207 W·m−1·K−1), compressive strength (45–188 kPa), and Young’s modulus (3–28 kPa). These biofoams are also environmentally friendly polymers and can aggregate revenue to the biodiesel industry, contributing to a reduction in fuel prices.

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Section: Introductionmentioning

confidence: 99%

Polyurethane Foams for Thermal Insulation Uses Produced from Castor Oil and Crude Glycerol Biopolyols

et al. 2017

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“…This might be due to the strong interfacial adhesion between the substrate and the adhesive. The failure process of joint bonding substrate was a cohesive failure, which confirmed the strong interfacial interaction between the adhesive and substrate [20,21] . This trend was in accordance with the strong interfacial interaction between the OH group of OMMT clay with the OH group in Al and OH group on wood substrate respectively.…”

Section: Lap Shear Testmentioning

confidence: 68%

Synthesis and characterization of polyurethane and its nanocomposite adhesive derived from biobased isocyanate and polyol

Sahoo

Mohanty

Nayak

2021

ACE

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In the current research, the vegetable oil based polyurethane nanocomposite (PUNC) adhesive was prepared using transesterified castor oil (CO) based polyol, partially biobased aliphatic isocyanate (PBAI) and organically modified montmorillonite nanoclay (Closite 30B). The transesterified CO was synthesized by reacting CO with ethylene glycol, which was confirmed using proton nuclear magnetic resonance (1HNMR) analysis. Further, the prepared polyurethane (PU) and its nanocomposite adhesive with specific NCO: OH molar ratio 1.3:1 was confirmed by Fourier transform infrared spectroscopy (FTIR) analysis. The increasing of wt% of nanoclay loading level up to 3% into PU matrix increased the lap shear strength of the adhesive systems. Subsequently, the effect of polyurethane nanocomposite adhesives on the bonding strength of wood-to-wood and aluminum-to-aluminum substrate was studied using lap shear strength test. The nanoclay was observed to effectively intercalate into the polymer matrix. Moreover, the phase separation in PU and PUNC adhesive was studied using atomic force microscope (AFM) and differential scanning calorimetry (DSC) analysis.

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“…The enthalpy (α*) of PU/SPI green composites have been estimated using following relation: α* = 〈 N 〉 1/2 g . The enthalpy is a measure of energy required for the formation of net planar structure, and it also appreciably controlled by the level g .…”

Section: Resultsmentioning

confidence: 99%

Polyurethane/Soya Protein Isolate Green Composites: Spectral, Microstructural, Thermal, Swelling, and Biodegradation Behaviors

et al. 2016

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A series of polyurethane (PU) green composites were synthesized with varying amounts, viz. 0, 2, 4, 8, and 12 wt% of soya protein isolate (SPI). Formation of the urethane linkage in the prepared green composites is revealed by infrared spectroscopy. The glass transition temperature (T g ) of the fabricated PU/SPI composites has been evaluated by differential scanning calorimeter. Thermal stability and degradation analysis of the PU/SPI composites have been performed using a thermogravimetric analyzer (TGA). TGA thermograms clearly revealed that the fabricated composites were thermally stable upto 181°C and show a three-step of thermal degradation. The water uptake behaviors of PU/SPI systems have been studied at different chemical environments such as distilled water, salt solution, acidic and alkaline solutions. The microcrystalline parameters such as crystallite size ( N ) and surface weighted crystal size (D s ) have been evaluated from wide-angle X-ray scattering profiles using two different asymmetric distribution functions. PU/SPI green composites were subjected to biodegradation in the presence of Aspergillus niger. The structure-property response of the PU/SPI green composites has been established on the basis of these parameters. C 2016 Wiley Periodicals, Inc. Adv Polym Technol 201 , , 21679; View this article online at wileyonlinelibrary.com.

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Structure–Property Relationship of Biobased Polyurethanes Obtained from Mixture of Naturally Occurring Vegetable Oils

Cited by 11 publications

References 38 publications

Polyurethane Foams for Thermal Insulation Uses Produced from Castor Oil and Crude Glycerol Biopolyols

Polyurethane Foams for Thermal Insulation Uses Produced from Castor Oil and Crude Glycerol Biopolyols

Synthesis and characterization of polyurethane and its nanocomposite adhesive derived from biobased isocyanate and polyol

Polyurethane/Soya Protein Isolate Green Composites: Spectral, Microstructural, Thermal, Swelling, and Biodegradation Behaviors

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