Optimization of Liquefaction Parameters of Cotton Burrs (Gossypium hirsutum L.) for Polyurethane-Type Isolation Foams

Abstract

Aim of study: The use of composites obtained from wood and similar lignocellulosic plants has increased all over the world. Because of the rapid depletion of forest natural resources, the rational use of declining wood raw materials and to evaluate environmental alternatives has gained importance. For this purpose, many alternative lignocellulosic raw materials are used as heat insulation material by producing foams. Material and method: This research compared the properties of liquefied using cotton burr after liquefaction under different acid concentrations, PEG 400-Glycerin/Cotton burr ratios, pore sizes, and PEG 400/Glycerin ratios. The cotton burrs were put in a reaction chamber at 160 °C for 2 h with the PEG 400-Glycerin/cotton burr and sulfuric acid in a glass balloon. Main results: The maximum yield in the liquefaction of cotton burrs was found in the polyethylene glycol/glycerin ratio of 1:1. It has been found that the amount of unliquefied cotton burrs decreased with increasing of the acid concentration, reaction temperature and time. Research highlights: Consequently, the liquefaction of cotton burrs could be seamlessly used in the production of polyurethane-type foam.

Biobased rigid polyurethane foam prepared from apricot stone shell-based polyol for thermal insulation application, Part 1: Synthesis, chemical, and physical properties

“…bioresources.com Fidan & Ertaş (2020). "Biobased rigid PU foam, Pt 1," BioResources 15(3), 6061-6079.…”

“…Until recently, a considerable amount of biomass has been liquefied to produce biobased PU foams such as agricultural wastes, e.g., corn bran (Lee et al 2000), waste paper (Lee et al 2002), chestnut and pine wood (Alma et al 2003), cornstalk (Yan et al 2008), wheat straw (Chen and Lu 2009), sugar-cane bagasse (Hakim et al 2011), soybean straw (Hu et al 2012), wood bark (Zhao et al 2012), peanut shell (Bilir et al 2013), wood powder (Zhang et al 2013), bamboo (Xie et al 2014), corn stover (Hu and Li 2014), eucalyptus and pine woods (Ertaş et al 2014), cork (Gama et al 2015b), lignin (Xue et al 2015), coffee grounds (Gama et al 2015a), sugar-cane bagasse (Xie et al 2015), lignin (Mahmood et al 2016), cork (Esteves et al 2017), yaupon holly (Huang et al 2017a), cotton burrs (Fidan and Ertaş 2020), and pine bark and peanut shell (Zhang et al 2020). However, up to now there has been no research on the production of PU foam from the liquefaction of low-diameter apricot stone shells.…”

Bio-based rigid polyurethane foam prepared from apricot stone shell-based polyol for thermal insulation application – Part 2: Morphological, mechanical, and thermal properties

“…The acid liquefaction of biomass resources to fabricate bio-based rigid polyurethane foams can include bamboo (Xie et al 2014), coffee grounds (Gama et al 2015a), cork (Gama et al 2015b;Esteves et al 2017), corn stalk (Yan et al 2008), corn bran (Lee et al 2000), cotton burrs (Fidan and Ertaş 2020a), eucalyptus, pine woods (Ertaş et al 2014), lignin (Xue et al 2015;Mahmood et al 2016), pine bark and peanut shell (Zhang et al 2020), soybean straw (Hu et al 2012), sugar-cane bagasse (Hakim et al 2011;Xie et al 2015), waste paper (Lee et al 2002), wheat straw (Chen and Lu 2009), wood bark (Zhao et al 2012), wood powder (Zhang et al 2013), and yaupon holly (Huang et al 2017a).…”