Synthesis of biomass-derived bottom waste ash based rigid biopolyurethane composite foams: Rheological behaviour, structure and performance characteristics. (February 2019)

• Record Type: Journal Article
• Authors: Kairytė, Agnė; Kizinievič, Olga; Kizinievič, Viktor; Kremensas, Arūnas
• Is Part Of: Composites. Volume 117(2019)
• Page Start: 193
• Page End: 201
• Publication Date: 2019-02
• Subjects: A. Particle-reinforcement -- A. Polymer-matrix composites (PMCs) -- B. Rheological properties -- D. Microstructural analysis; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2018.11.019
• Languages: English
• ISSNs: 1359-835X

Abstract

Abstract: This paper reports a novel type of rigid biopolyurethane composite foam based on rapeseed oil polyol and biomass-derived bottom waste ash (WA) for thermal insulation applications. It is shown that biopolyol premixes with various amounts of WA are characterised by a slightly increased dynamic viscosity, from 115 mPa·s to 289 mPa·s. Moreover, WA particles absorb part of the heat generated from the reaction and reduce the temperature by 31 °C, thus inhibiting the string-gel and tack-free times. The WA particles makes them possible nucleation sites. Therefore the average cell size reduce by an average of 2.4 times and thermal conductivity when measured 1 day after production – by approximately 3.6% compared to the control foam. Furthermore, moisture-mechanical properties show that WA increases water absorption due to the unburnt carbon in the WA. The slightly reduced closed cell content increases the compressive strength by ∼14% when 20 wt% of WA is used.