scholarly journals Implementation of Circular Economy Principles in the Synthesis of Polyurethane Foams

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2068 ◽  
Author(s):  
Maria Kurańska ◽  
Milena Leszczyńska ◽  
Elżbieta Malewska ◽  
Aleksander Prociak ◽  
Joanna Ryszkowska
Keyword(s):  
Diethylene Glycol ◽  
Waste Recycling ◽  
Polyurethane Foams ◽  
Mechanical And Thermal Properties ◽  
Chemical Structures ◽  
Cooking Oil ◽  
Used Cooking Oil ◽  
Thermal Insulating ◽  
Coefficient Of Thermal Conductivity ◽  
Main Strategy

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.

scholarly journals Development and Characterization of “Green Open-Cell Polyurethane Foams” with Reduced Flammability

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5459 ◽  
Author(s):  
Maria Kurańska ◽  
Hynek Beneš ◽  
Kamila Sałasińska ◽  
Aleksander Prociak ◽  
Elżbieta Malewska ◽  
...  
Keyword(s):  
Flame Retardants ◽  
Cell Structure ◽  
Polyurethane Foams ◽  
Triethyl Phosphate ◽  
Waste Oil ◽  
Open Cell ◽  
Chemical Structures ◽  
Cooking Oil ◽  
Used Cooking Oil

This work presents the cell structure and selected properties of polyurethane (PUR) foams, based on two types of hydroxylated used cooking oil and additionally modified with three different flame retardants. Bio-polyols from municipal waste oil with different chemical structures were obtained by transesterification with triethanolamine (UCO_TEA) and diethylene glycol (UCO_DEG). Next, these bio-polyols were used to prepare open-cell polyurethane foams of very low apparent densities for thermal insulation applications. In order to obtain foams with reduced flammability, the PUR systems were modified with different amounts (10–30 parts per hundred polyol by weight—php) of flame retardants: TCPP (tris(1-chloro-2-propyl)phosphate), TEP (triethyl phosphate), and DMPP (dimethyl propylphosphonate). The flame retardants caused a decrease of the PUR formulations reactivity. The apparent densities of all the foams were comparable in the range 12–15 kg/m3. The lowest coefficients of thermal conductivity were measured for the open-cell PUR foams modified with DMPP. The lowest values of heat release rate were found for the foams based on the UCO_TEA and UCO_DEG bio-polyols that were modified with 30 php of DMPP.

scholarly journals Open-cell polyurethane foams based on modified used cooking oil

Polimery ◽  
2020 ◽  
Vol 65 (03) ◽  
pp. 216-225 ◽  
Author(s):  
Maria Kuranska ◽  
Krzysztof Polaczek ◽  
Monika Auguscik-Krolikowska ◽  
Aleksander Prociak ◽  
Joanna Ryszkowska
Keyword(s):  
Polyurethane Foams ◽  
Open Cell ◽  
Cooking Oil ◽  
Used Cooking Oil

scholarly journals A Pathway toward a New Era of Open-Cell Polyurethane Foams—Influence of Bio-Polyols Derived from Used Cooking Oil on Foams Properties

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5161
Author(s):  
Maria Kurańska ◽  
Elżbieta Malewska ◽  
Krzysztof Polaczek ◽  
Aleksander Prociak ◽  
Joanna Kubacka
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Foam Cell ◽  
Polyurethane Foams ◽  
Cell Content ◽  
Open Cell ◽  
New Era ◽  
Used Cooking Oil ◽  
Coefficient Of Thermal Conductivity ◽  
Cooking Oils

In order to create greener polyurethane (PUR) foams, modified used cooking oils (UCO) were applied as starting resources for the synthesis of bio-polyols. The bio-polyols were produced using transesterification of UCO with diethylene glycol (UCO_DEG) and triethanolamine (UCO_TEA). Next, open-cell PUR foams were synthesized by replacing 20, 40, 60, 80 and 100% of the petrochemical polyol with the bio-polyol UCO_DEG or UCO_TEA. It was observed that an increasing bio-polyol content (up to 60%) led to an increase of the closed cell content. However, a further increase in the bio-polyol content up to 100% resulted in foam cell opening. The bio-foams obtained in the experiment had an apparent density of 13–18 kg/m3. The coefficient of thermal conductivity was determined at three different average temperatures: 10, 0 and −10 °C. The PUR bio-foams modified with bio-polyol UCO_TEA had lower values of thermal conductivity, regardless of the average temperature (35.99–39.57 mW/m·K) than the foams modified with bio-polyol UCO_DEG (36.95–43.78 mW/m·K). The compressive strength of most of the bio-foams was characterized by a higher value than the compressive strength of the reference material (without bio-polyol). Finally, it was observed that the bio-materials exhibited dimensional stability at 70 °C.

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

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5673
Author(s):  
Maria Kurańska ◽  
Roman Barczewski ◽  
Mateusz Barczewski ◽  
Aleksander Prociak ◽  
Krzysztof Polaczek
Keyword(s):  
Flame Retardant ◽  
Thermal Insulation ◽  
Sound Absorption ◽  
Raw Materials ◽  
Polyurethane Foams ◽  
Absorption Properties ◽  
Open Cell ◽  
Cooking Oil ◽  
Used Cooking Oil ◽  
Standing Wave Method

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.

scholarly journals Effects of Modified Used Cooking Oil on Structure and Properties of Closed-Cell Polyurethane foams

2020 ◽  
Vol 28 (10) ◽  
pp. 2780-2788 ◽  
Author(s):  
Maria Kurańska ◽  
Milena Leszczyńska ◽  
Joanna Kubacka ◽  
Aleksander Prociak ◽  
Joanna Ryszkowska
Keyword(s):  
Polyurethane Foams ◽  
Structure And Properties ◽  
Cooking Oil ◽  
Used Cooking Oil ◽  
Closed Cell

scholarly journals Bio-Based Polyurethane Foams with Castor Oil Based Multifunctional Polyols for Improved Compressive Properties

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 576 ◽  
Author(s):  
Joo Hyung Lee ◽  
Seong Hun Kim ◽  
Kyung Wha Oh
Keyword(s):  
Castor Oil ◽  
Production Efficiency ◽  
Click Reaction ◽  
Polyurethane Foams ◽  
Protective Equipment ◽  
Mechanical And Thermal Properties ◽  
Compressive Properties ◽  
Chemical Structures ◽  
Pu Foam ◽  
Absorbing Material

Currently, most commercial polyols used in the production of polyurethane (PU) foam are derived from petrochemicals. To address concerns relating to environmental pollution, a sustainable resource, namely, castor oil (CO), was used in this study. To improve the production efficiency, sustainability, and compressive strength of PU foam, which is widely used as an impact-absorbing material for protective equipment, PU foam was synthesized with CO-based multifunctional polyols. CO-based polyols with high functionalities were synthesized via a facile thiol-ene click reaction method and their chemical structures were analyzed. Subsequently, a series of polyol blends of castor oil and two kinds of castor oil-based polyols with different hydroxyl values was prepared and the viscosity of the blends was analyzed. Polyurethane foams were fabricated from the polyol blends via a free-rising method. The effects of the composition of the polyol blends on the structural, morphological, mechanical, and thermal properties of the polyurethane foams were investigated. The results demonstrated that the fabrication of polyurethane foams from multifunctional polyol blends is an effective way to improve their compressive properties. We expect these findings to widen the range of applications of bio-based polyurethane foams.

Analysis of the Social and Environmental Impact of Biodiesel Fuel Refined from Used Cooking Oil in Ibaraki Prefecture

2010 ◽  
Vol 40 (3) ◽  
pp. 749-762
Author(s):  
Hirokazu GOTO ◽  
Yuichi HATAYA ◽  
Yasuyuki YOKOTA ◽  
Takeshi MIZUNOYA ◽  
Yoshiro HIGANO
Keyword(s):  
Environmental Impact ◽  
Biodiesel Fuel ◽  
Cooking Oil ◽  
Used Cooking Oil ◽  
The Social ◽  
Ibaraki Prefecture

Synthesis and characterization of coal fly ash supported zinc oxide catalyst for biodiesel production using used cooking oil as feed

2021 ◽  
Vol 170 ◽  
pp. 302-314
Author(s):  
Adeyinka S. Yusuff ◽  
Aman K. Bhonsle ◽  
Jayati Trivedi ◽  
Dinesh P. Bangwal ◽  
Lok P. Singh ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Fly Ash ◽  
Oxide Catalyst ◽  
Coal Fly Ash ◽  
Biodiesel Production ◽  
Synthesis And Characterization ◽  
Cooking Oil ◽  
Used Cooking Oil

scholarly journals Two-Stage Biodiesel Synthesis from Used Cooking Oil with a High Acid Value via an Ultrasound-Assisted Method

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3703
Author(s):  
Ming-Chien Hsiao ◽  
Wei-Ting Lin ◽  
Wei-Cheng Chiu ◽  
Shuhn-Shyurng Hou
Keyword(s):  
Acid Value ◽  
Molar Ratio ◽  
Optimal Conditions ◽  
Two Stage ◽  
Cooking Oil ◽  
High Acid ◽  
Used Cooking Oil ◽  
Biodiesel Synthesis ◽  
Stage Process ◽  
Ultrasound Assisted

In this study, ultrasound was used to accelerate two-stage (esterification–transesterification) catalytic synthesis of biodiesel from used cooking oil, which originally had a high acid value (4.35 mg KOH/g). In the first stage, acid-catalyzed esterification reaction conditions were developed with a 9:1 methanol/oil molar ratio, sulfuric acid dosage at 2 wt %, and a reaction temperature of 60 °C. Under ultrasound irradiation for 40 min, the acid value was effectively decreased from 4.35 to 1.67 mg KOH/g, which was decreased to a sufficient level (<2 mg KOH/g) to avoid the saponification problem for the subsequent transesterification reaction. In the following stage, base-catalyzed transesterification reactions were carried out with a 12:1 methanol/oil molar ratio, a sodium hydroxide dosage of 1 wt %, and a reaction temperature of 65 °C. Under ultrasound-assisted transesterification for 40 min, the conversion rate of biodiesel reached 97.05%, which met the requirement of EN 14214 standard, i.e., 96.5% minimum. In order to evaluate and explore the improvement of the ultrasound-assisted two-stage (esterification–transesterification) process in shortening the reaction time, additional two-stage biodiesel synthesis experiments using the traditional mechanical stirring method under the optimal conditions were further carried out in this study. It was found that, under the same optimal conditions, using the ultrasound-assisted two-stage process, the total reaction time was significantly reduced to only 80 min, which was much shorter than the total time required by the conventional method of 140 min. It is worth noting that compared with the traditional method without ultrasound, the intensification of the ultrasound-assisted two-stage process significantly shortened the total time from 140 min to 80 min, which is a reduction of 42.9%. It was concluded that the ultrasound-assisted two-stage (esterification–transesterification) catalytic process is an effective and time-saving method for synthesizing biodiesel from used cooking oil with a high acid value.

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