Impact of different epoxidation approaches of tall oil fatty acids on rigid polyurethane foam thermal insulation
Authors:
- Arnis Abolins,
- Ralfs Pomilovskis,
- Edgars Vanags,
- Inese Mierina,
- Slawomir Michałowski,
- Anda Fridrihsone,
- Mikelis Kirpluks
Abstract
A second-generation bio-based feedstock-tall oil fatty acids-was epoxidised via two pathways. Oxirane rings were introduced into the fatty acid carbon backbone using a heterogeneous epoxidation catalyst-ion exchange resin Amberlite IR-120 H or enzyme catalyst Candida antarctica lipase B under the trade name Novozym® 435. High functionality bio-polyols were synthesised from the obtained epoxidated tall oil fatty acids by oxirane ring-opening and subsequent esterification reactions with different polyfunctional alcohols: trimethylolpropane and triethanolamine. The synthesised epoxidised tall oil fatty acids (ETOFA) were studied by proton nuclear magnetic resonance. The chemical structure of obtained polyols was studied by Fourier-transform infrared spectroscopy and size exclusion chromatography. Average molecular weight and polydispersity of polyols were determined from size exclusion chromatography data. The obtained polyols were used to develop rigid polyurethane (PU) foam thermal insulation material with an approximate density of 40 kg/m3. Thermal conductivity, apparent density and compression strength of the rigid PU foams were determined. The rigid PU foams obtained from polyols synthesised using Novozym® 435 catalyst had superior properties in comparison to rigid PU foams obtained from polyols synthesised using Amberlite IR-120 H. The developed rigid PU foams had an excellent thermal conductivity of 21.2-25.9 mW/(m·K).
- Record ID
- CUT12b3eeb45a6e451ca7af74b3ab98e78b
- Publication categories
- ;
- Author
- Journal series
- Materials, ISSN , e-ISSN 1996-1944, Biweekly
- Issue year
- 2021
- Vol
- 14
- No
- 4
- Pages
- [1-16]
- Article number
- 894
- Other elements of collation
- fot.; schem.; tab.; wykr.; Bibliografia (na s.) - 14-16; Bibliografia (liczba pozycji) - 57; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 14, Iss. 4, Spec. Iss.
- Substantive notes
- Special Issue: Structure, Properties and Applications of Polymeric Foams
- Keywords in English
- high functionality polyols, ion-exchange resin, lipase enzyme catalyst, rigid polyurethane foam, tall oil fatty acids
- DOI
- DOI:10.3390/ma14040894 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/14/4/894 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT12b3eeb45a6e451ca7af74b3ab98e78b/
- URN
urn:pkr-prod:CUT12b3eeb45a6e451ca7af74b3ab98e78b
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.