Effect of homogeneous catalysts on ring opening reactions of epoxidized cooking oils

Kurańska, Maria; Beneš, Hynek; Polaczek, Krzysztof; Trhlíková, Olga; Walterová, Zuzana; Prociak, Aleksander

doi:10.1016/j.jclepro.2019.05.096

Cited by 43 publications

(28 citation statements)

References 19 publications

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“…Bio-polyol with a hydroxyl number of 270 mgKOH/g was synthesized from used cooking oil at Cracow University of Technology according to the method described in our earlier publications [ 9 , 16 ]. A petrochemical polyether polyol with the trade name Rokopol RF-551 and a hydroxyl number of 440 mgKOH/g was supplied by PCC Rokita (Brzeg Dolny, Poland).…”

Section: Methodsmentioning

confidence: 99%

“…The epoxidized UCOs that we obtained were characterized by epoxy values in the range 0.10–0.34 mol/100g [ 8 ]. Bio-polyols synthesized by ring opening reactions were characterized by hydroxyl values of 100–295 mgKOH/g [ 9 , 10 , 11 ]. Such a wide range of hydroxyl values allows applications of bio-polyols in the preparation of different types of polyurethane foams (rigid, semi-rigid, flexible).…”

Section: Introductionmentioning

confidence: 99%

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Thermal Insulation and Sound Absorption Properties of Open-Cell Polyurethane Foams Modified with Bio-Polyol Based on Used Cooking Oil

Kurańska

Barczewski

et al. 2020

Materials

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The main goal of this work was to evaluate the thermal insulation and sound absorption properties of open-cell rigid polyurethane foams synthesized with different contents of cooking oil-based polyol. The content of the applied bio-polyol as well as flame retardant (triethyl phosphate) in the foam formulation had a significant influence on the cellular structures of the materials. The open-cell polyurethane foams were characterized by apparent densities in the range 16–30 kg/m3. The sound absorption coefficients of the polyurethanes with various contents of bio-polyol were determined using the standing wave method (Kundt’s tube) in the frequency range of 100–6300 Hz. The effect of the content of the bio-polyol and flame retardant on the coefficient of thermal conductivity (at average temperatures of 0, 10 and 20 °C) as well as the compressive strength (at 20 and −10 °C) was analyzed. Different trends were observed in terms of the thermal insulation properties and sound absorption ability of the open-cell polyurethanes due to the addition of bio-polyol. In conclusion, it is necessary to use systems containing both petrochemical and bio-based raw materials.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Insulation and Sound Absorption Properties of Open-Cell Polyurethane Foams Modified with Bio-Polyol Based on Used Cooking Oil

Kurańska

Barczewski

et al. 2020

Materials

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“…Polyurethanes can be modified by replacing, completely or partially, polyols, which are one of two main components in their synthesis. Bio-polyols are obtained both from vegetable oils (rapeseed, palm, soybean) and from used cooking oils as waste materials [ 10 ]. Application of rapeseed oil in polyol synthesis, compared to petrochemical polyols, has a significant impact on the reduction of non-renewable energy use, lower greenhouse gas emissions and water consumption [ 11 ].…”

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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“…The structure of ODEA was shown in Figure 4. After the reaction with diethanol amine, new signals corresponding to N (CH 2 ) 2 OH appeared at 3.41-3.85 ppm (peak 2,3), 40 and the signals related to methyl ester disappeared. These results were in agreement with the FTIR analysis.…”

Section: Ft-ir Spectramentioning

confidence: 99%

Synthesis of polyols containing nitrogen‐phosphorus from vegetable oil derivatives for polyurethane film applications

Jiang

Zhao²,

Zhao³

et al. 2021

J of Applied Polymer Sci

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Methyl oleate, a kind of vegetable oil derivatives, was used as the raw material to synthesize novel polyols containing nitrogen and phosphorus (PNP) by three steps: amidaion, epoxidation, and ring-opening reaction. The structure of the ensuing PNP was characterized by gel permeation chromatography, Fourier transform infrared spectroscopy, and nuclear magnetic resonance spectroscopy. Then, polyurethane films were prepared by mixing the resulting polyols (PNP) and poly-(tetra methylene glycol) with isophorone diisocyanate in different proportions. After that, the thermostability of polyurethane films was investigated by limiting oxygen index (LOI), thermogravimetry, and cone calorimeter test. Similarly, mechanical property of polyurethane films was studied by tensile test. The results showed that as the amount of PNP increased, the tensile strength of polyurethane films increased from 2.0 to 13.5 MPa, the LOI values of polyurethane films went up from 20.1% to 25.5%. Moreover, the initial decomposition temperature of polyurethane films improved from 280 to 312 C and the total heat release drooped from 32.2 to 21.7 kW/m 2 without adding any other flame retardant. Therefore, it was observed that the polyurethane films have superior thermal stability and mechanical property and appear suitable for a wide range of applications.

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Effect of homogeneous catalysts on ring opening reactions of epoxidized cooking oils

Cited by 43 publications

References 19 publications

Thermal Insulation and Sound Absorption Properties of Open-Cell Polyurethane Foams Modified with Bio-Polyol Based on Used Cooking Oil

Thermal Insulation and Sound Absorption Properties of Open-Cell Polyurethane Foams Modified with Bio-Polyol Based on Used Cooking Oil

Implementation of Circular Economy Principles in the Synthesis of Polyurethane Foams

Synthesis of polyols containing nitrogen‐phosphorus from vegetable oil derivatives for polyurethane film applications

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