Natural oil based highly functional polyols as feedstock for rigid polyurethane foam thermal insulation

Kirpļuks, Miķelis; Kalnbunde, D.; Beneš, Hynek; Cābulis, Uģis

doi:10.1016/j.indcrop.2018.06.040

Cited by 75 publications

(53 citation statements)

References 35 publications

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“…Sung Woong Choi et al [ 213 ] analyzed the thermal properties and heat transfer mechanisms of PUFs blown with water and reported a thermal conductivity between 0.023–0.027 W·m −1 ·K −1 . M. Kirpluks et al [ 214 ] used natural oil-based polyols as feedstock for the production of thermal insulation rigid PUFs, which presented a thermal conductivity below 0.022 W·m −1 ·K −1 , just to mention some recent reports that have highlighted the suitability of the use of PUFs as thermal insulation materials.…”

Section: Polyurethane Foams Applications and Enhancement Of Propermentioning

confidence: 99%

Polyurethane Foams: Past, Present, and Future

2018

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Polymeric foams can be found virtually everywhere due to their advantageous properties compared with counterparts materials. Possibly the most important class of polymeric foams are polyurethane foams (PUFs), as their low density and thermal conductivity combined with their interesting mechanical properties make them excellent thermal and sound insulators, as well as structural and comfort materials. Despite the broad range of applications, the production of PUFs is still highly petroleum-dependent, so this industry must adapt to ever more strict regulations and rigorous consumers. In that sense, the well-established raw materials and process technologies can face a turning point in the near future, due to the need of using renewable raw materials and new process technologies, such as three-dimensional (3D) printing. In this work, the fundamental aspects of the production of PUFs are reviewed, the new challenges that the PUFs industry are expected to confront regarding process methodologies in the near future are outlined, and some alternatives are also presented. Then, the strategies for the improvement of PUFs sustainability, including recycling, and the enhancement of their properties are discussed.

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Section: Polyurethane Foams Applications and Enhancement Of Propermentioning

confidence: 99%

Polyurethane Foams: Past, Present, and Future

2018

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“…Polyurethanes are one of the most versatile polymers because isocyanates react with several chemical groups; this provides a way to obtain a full spectrum of applications, such as adhesives, insulation foams, coatings, and biomedical devices . Rigid polyurethane foams (rPUFs) represent a material of choice for improving the energy efficiency of buildings.…”

Section: Introductionmentioning

confidence: 99%

Highly functional lactic acid ring‐opened soybean polyols applied to rigid polyurethane foams

Herrán

Amalvy

Chiacchiarelli

2019

J of Applied Polymer Sci

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We synthesized polyols with high hydroxyl functionalities (F OH s), between 9.0 and 12.6, and characterized them with differential scanning calorimetry, thermogravimetric analysis, and size exclusion chromatography after we parametrically studied the ringopening reaction of epoxidized soybean oil with lactic acid (LA) as a function of the reaction temperature and lactic acid equivalent fraction (f LA ). An increase of only 20 C in the reaction temperature (from 80 to 100 C) caused changes in the hydroxyl number (+17.8%), F OH (-25%), viscosity (-14.0%), and oligomeric content (-24.1%). f LA mostly affected the ring-opening yield, and only for f LA values above 0.4 was possible to achieve values higher than 80%. Rigid polyurethane foams (rPUFs) were synthesized and characterized with scanning electron microscopy, dynamic mechanical analysis (DMA), and compressive mechanical tests. rPUFs with a very high specific compressive strength (7.8 kPa kg -1 m 3 ) were synthesized solely with biobased soybean oil. DMA revealed a compromised relationship between the specific compressive strength and its temperature dependence. To increase the first one, the most relevant method was to increase F OH . Instead, to increase the latter one, the OH number had to be maximized.

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“…In recent years, a variety of methods to obtain polyols from plant oils have been studied, including: epoxidation and oxirane ring-opening [2,4,[26][27][28][29][30][31][32][33][34][35][36][37][38]; hydroformylation and hydrogenation [2,4,16,36,37,39]; ozonolysis [2,4,16,36,37]; air oxidation [16,40]; dihydroxylation [16]; thiol-ene coupling [4,19,37,[41][42][43]; transesterification and transamidation [4,20,[26][27][28]37,38,44,45], and photochemical epoxidation (Schenck-ene reaction) [46][47][48]. However, nearly all of the published papers about polyol synthesis from plant oils are focused just on low or medium functionality/hydroxyl value polyol synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Closed cell rigid PU foam thermal insulation applied in civil engineering usually has an apparent density of 40-60 kg/m 3 with thermal conductivity of 20-30 mW/(m•K) [22,54,55]. Various sustainable feedstocks have been successfully used to develop rigid PU foams with low thermal conductivity wales, such as rapeseed oil [28,56], soybean oil [57], lignin [58], and recycled polyethylene terephthalate (PET) waste [53,59]. Although materials derived from sustainable feedstock have been used in the mentioned rigid PU foam formulations, the addition of petrochemical-based crosslinking reagents was required to develop a material with satisfactory properties.…”

Section: Introductionmentioning

confidence: 99%

High Functionality Bio-Polyols from Tall Oil and Rigid Polyurethane Foams Formulated Solely Using Bio-Polyols

et al. 2020

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High-quality rigid polyurethane (PU) foam thermal insulation material has been developed solely using bio-polyols synthesized from second-generation bio-based feedstock. High functionality bio-polyols were synthesized from cellulose production side stream—tall oil fatty acids by oxirane ring-opening as well as esterification reactions with different polyfunctional alcohols, such as diethylene glycol, trimethylolpropane, triethanolamine, and diethanolamine. Four different high functionality bio-polyols were combined with bio-polyol obtained from tall oil esterification with triethanolamine to develop rigid PU foam formulations applicable as thermal insulation material. The developed formulations were optimized using response surface modeling to find optimal bio-polyol and physical blowing agent: c-pentane content. The optimized bio-based rigid PU foam formulations delivered comparable thermal insulation properties to the petro-chemical alternative.

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Natural oil based highly functional polyols as feedstock for rigid polyurethane foam thermal insulation

Cited by 75 publications

References 35 publications

Polyurethane Foams: Past, Present, and Future

Polyurethane Foams: Past, Present, and Future

Highly functional lactic acid ring‐opened soybean polyols applied to rigid polyurethane foams

High Functionality Bio-Polyols from Tall Oil and Rigid Polyurethane Foams Formulated Solely Using Bio-Polyols

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