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.

Mechanical and sound absorption properties of open-cell polyurethane foams modified with rock wool fiber

2021 ◽  
pp. 103872
Author(s):  
Behzad Mohammadi ◽  
Amir Ershad-Langroudi ◽  
Gholamreza Moradi ◽  
Abdolrasoul Safaiyan ◽  
Peymaneh Habibi
Keyword(s):  
Sound Absorption ◽  
Polyurethane Foams ◽  
Wool Fiber ◽  
Absorption Properties ◽  
Open Cell ◽  
Rock Wool

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 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 Alternative Raw Materials to Produce Biodiesel through Alkaline Heterogeneous Catalysis

Catalysts ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 690 ◽  
Author(s):  
Edgar M. Sánchez Faba ◽  
Gabriel O. Ferrero ◽  
Joana M. Dias ◽  
Griselda A. Eimer
Keyword(s):  
Heterogeneous Catalysis ◽  
Raw Materials ◽  
Fatty Acid Content ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Absolute Methanol ◽  
Solid Catalyst ◽  
Oil Refineries ◽  
Cooking Oil ◽  
Used Cooking Oil

Recent research focuses on new biodiesel production and purification technologies that seek a carbon-neutral footprint, as well as cheap, renewable and abundant raw materials that do not compete with the demand for food. Then, many attractive alternatives arise due to their availability or low-cost, such as used cooking oil, Jatropha oil (non-edible) or byproducts of vegetable oil refineries. Due to their composition and the presence of moisture, these oils may need a pretreatment to reach the established conditions to be used in the biodiesel production process so that the final product complies with the international quality standards. In this work, a solid catalyst based on 10 wt % sodium oxide supported on mesoporous silica SBA-15, was employed in the transesterification of different feedstocks (commercial sunflower and soybean oil, used cooking oil, acid oil from soapstock and Jatropha hieronymi oil) with absolute methanol in the following reaction conditions—2–8 wt % catalyst, 14:1 methanol to oil molar ratio, 60 °C, vigorous magnetic stirring and 5 h of reaction. In this way, first- and second-generation biodiesel was obtained through heterogeneous catalysis with methyl ester yields between 52 and 97 wt %, depending on the free fatty acid content and the moisture content of the oils.

scholarly journals The Effects of Various Additive Components on the Sound Absorption Performances of Polyurethane Foams

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Shuming Chen ◽  
Yang Jiang ◽  
Jing Chen ◽  
Dengfeng Wang
Keyword(s):  
Absorption Coefficient ◽  
Sound Absorption ◽  
Transmission Loss ◽  
Polyurethane Foams ◽  
Acoustic Properties ◽  
Acoustic Absorption ◽  
Absorption Properties ◽  
Maximum Enhancement ◽  
Flexible Polyurethane ◽  
Pu Foams

Flexible polyurethane (PU) foams comprising various additive components were synthesized to improve their acoustic performances. The purpose of this study was to investigate the effects of various additive components of the PU foams on the resultant sound absorption, which was characterized by the impedance tube technique to obtain the incident sound absorption coefficient and transmission loss. The maximum enhancement in the acoustic properties of the foams was obtained by adding fluorine-dichloroethane (141b) and triethanolamine. The results showed that the acoustic absorption properties of the PU foams were improved by adding 141b and triethanolamine and depended on the amount of the water, 141b, and triethanolamine.

Sound absorption properties of ceramic hollow sphere structures with micro-sized open cell

2014 ◽  
Vol 134 ◽  
pp. 268-271 ◽  
Author(s):  
Gaohui Wu ◽  
Ruifeng Li ◽  
Yu Yuan ◽  
Longtao Jiang ◽  
Dongli Sun
Keyword(s):  
Hollow Sphere ◽  
Sound Absorption ◽  
Absorption Properties ◽  
Open Cell

scholarly journals KRITERIA RUMAH MAKAN SUPPLIER MINYAK JELANTAH DALAM RANGKA PERENCANAAN BAHAN BAKU BIODIESEL

2019 ◽  
Vol 1 (1) ◽  
pp. 27-33
Author(s):  
D.U.M. Susilo ◽  
Th. Candra Wasis A.S. ◽  
Zakwan .
Keyword(s):  
Raw Materials ◽  
Waste Cooking Oil ◽  
Raw Material ◽  
Biodiesel Production ◽  
Analytic Hierarchy ◽  
Cooking Oil ◽  
Used Cooking Oil ◽  
A Value ◽  
Many Sources ◽  
The City

The using of biodiesel as an environmentally friendly fuel has received attention from consumers to producers. So, a lot of research was done on the potential raw material to become biodiesel. One of the raw materials for biodiesel was waste cooking oil. Pontianak City have many sources including waste cooking oil from restaurants. Therefore restaurants in the city of Pontianak might be used as suppliers of waste cooking oil in biodiesel production. This study aims to determine the priority of criteria and sub-criteria for restaurants as suppliers and determine good restaurants as suppliers of used cooking in Pontianak City . Purposive technique sampling using a sample of 61 house dining, interviewed to obtain alternative data suppliers. Expert survey questionnaire contains priority weighting of criteria and supplier criteria, analyzed using AHP ( Analytic Hierarchy Process ). Grouping of restaurants based on alternative supplier values ​​is used to determine good restaurants to be suppliers. The priority criteria for restaurants as consecutive suppliers are experience (0.289), quality (0.279), capacity (0.231), service (0.148) and price (0.053). Sub-criteria priority of restaurants as suppliers in a row is the time span of used cooking oil sold(0.161), length of time used cooking oil (0.155), income (0.129), type of cooking oil (0.107), type of fried food products (0.092), volume of cooking oil (0.090), frying volume (0.085), transaction convenience (0.082), subject to used cooking oil (0.056), used cooking oil price (0.030) and ease of payment (0.013). A value of ≥ 0.325 is a dining value that shows a very better priority as a supplier. The number of restaurants as suppliers is 8 % of the population of restaurants in the city of Pontianak..

Inherently flame-retardant rigid polyurethane foams with excellent thermal insulation and mechanical properties

Polymer ◽  
2018 ◽  
Vol 153 ◽  
pp. 616-625 ◽  
Author(s):  
Shui-Xiu Wang ◽  
Hai-Bo Zhao ◽  
Wen-Hui Rao ◽  
Sheng-Chao Huang ◽  
Ting Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Thermal Insulation ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams
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