Highly efficient liquefaction of wheat straw for the production of bio-polyols and bio-based polyurethane foams

Li, Hongwei; Feng, Shanghuan; Yuan, Zhongshun; Qin, Wei; Xu, Chunbao

doi:10.1016/j.indcrop.2017.08.060

Cited by 52 publications

(33 citation statements)

References 37 publications

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“…36,37 The FT-IR absorptions between 1300 cm À1 and 950 cm À1 could be caused by C-O stretching vibrations and O-H bending vibrations, respectively, suggesting the presence of esters, acids, phenols and alcohols. 38,39 Moreover, the N-H bending vibration peak at 1514 cm À1 corresponded to nitrogenous compounds, while the absorbance peak at 808 cm À1 indicated the possible presence of aromatic compounds. 39 These results demonstrated the presence of various components identied by GC-MS in the heavy oils, such as phenols, hydrocarbons, alcohols, acids and nitrogenous compounds.…”

Section: Resultsmentioning

confidence: 99%

Characterization of biofuel production from hydrothermal treatment of hyperaccumulator waste (Pteris vittata L.) in sub- and supercritical water

Chen

2020

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Characterization of biofuel production from hydrothermal treatment of hyperaccumulator waste (Pteris vittata L.) in sub- and supercritical water

Chen

2020

RSC Adv.

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“…Cream time is the time in seconds where the mixture begins to change from liquid to a creamy state before expansion. Free rise time is the time in seconds from the expansion starting point to the maximum height of the foam [ 20 ].…”

Section: Methodsmentioning

confidence: 99%

Bio-Degradable Polyurethane Foams Produced by Liquefied Polyol from Wheat Straw Biomass

et al. 2020

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In the present work, an abundant and unused residue (wheat straw) has been employed to synthesize a polyol as a substituent of castor oil in polyurethane foams. The liquefied product showed excellent properties for the proposed application. Castor oil was substituted with up to 50% wheat straw polyol in the formulation of polyurethane foams, which were prepared using two different isocyanates (methylene diphenyl diisocyanate (MDI) and toluene-2,4-diisocyanate (TDI)). The evaluation of physical, mechanical, and thermal properties of the foams revealed that these materials can successfully be formed with up to 40% wheat straw polyols since all the results were improved. Moreover, at this polyol concentration, the morphology of the foams was presented as a compact and ordered structure. Following this trend, the foams showed excellent biodegradability at 30 days (5.60 and 7.31% for TDI and MDI foams, respectively) and 60 days (8.49 and 9.88% for TDI and MDI foams, respectively) in the soil media tests carried out. Thus, the materials prepared in this work can be proposed for agricultural applications such as use in plant nurseries.

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“…The functionality of a biopolyol is associated with the content of double bonds in oil [20], as well as the type and conditions of modification [5]. In general, the basic properties of biopolyols described in the scientific literature are as follows: the molecular weight in the range of 500-4000 g/mol, hydroxyl values from 50 to 300 mgKOH/g [7] and functionality from 2 to 8 [21].…”

Section: Wpływ Struktury Chemicznej Biopolioli Z Oleju Rzepakowego Namentioning

confidence: 99%

Influence of the chemical structure of rapeseed oil-based polyols on selected properties of polyurethane foams

2020

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In this work, we report on obtaining rigid polyurethane foams with biopolyols based on rapeseed oil. The biopolyols with different functionality were synthesized in a two-stage reaction of oil epoxidation and oxirane ring opening with 1-hexanol ( P_1Hex) and 1,6-hexanediol (P_1.6Hex) and their properties were characterized (Table 2, Figs. 1-3). Next, they were used to replace petrochemical polyols in foams by up to 60% by mass (Table 1). The introduction of the biopolyols into the polyurethane systems affected their reactivity (Fig. 4). The replacement of the petrochemical polyols with the biopolyols caused changes in the cell structure (Tables 3, 4) and the physical and mechanical properties of the resultant materials (Table 5).

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Highly efficient liquefaction of wheat straw for the production of bio-polyols and bio-based polyurethane foams

Cited by 52 publications

References 37 publications

Characterization of biofuel production from hydrothermal treatment of hyperaccumulator waste (Pteris vittata L.) in sub- and supercritical water

Characterization of biofuel production from hydrothermal treatment of hyperaccumulator waste (Pteris vittata L.) in sub- and supercritical water

Bio-Degradable Polyurethane Foams Produced by Liquefied Polyol from Wheat Straw Biomass

Influence of the chemical structure of rapeseed oil-based polyols on selected properties of polyurethane foams

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