Preparation of bio-polyols by liquefaction of hardwood residue and their application in the modification of polyurethane foams

Lu, Xianzhe; Wang, Yingchun; Zhang, Yizhuan; Cheng, Xin; Yu, Yan; Jin, Yanqiao

doi:10.1007/s11595-016-1468-7

Cited by 10 publications

(12 citation statements)

References 24 publications

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“…This might be because at low temperatures, only accessible polysaccharides such as hemicelluloses and amorphous cellulose can be liqueed. 27 At 160 C, the residue degree was decreased, which is consistent with literature that lignin was modied by glycols undergoing a condensation reactions with the phenolic hydroxyls to produce aliphatic hydroxyl functional groups.…”

Section: Liquefaction Yield and Hydroxyl Value Of Liqueed Wood Productssupporting

confidence: 90%

Liquefaction of waste pine wood and its application in the synthesis of a flame retardant polyurethane foam

et al. 2017

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The utilization of sustainable forestry waste resources in the production of polyurethane (PU) foam is a promising green alternative to the use of un-sustainable resources. In this work, we report the liquefaction of waste pine wood at different reaction temperatures and its application in synthesizing a melamine phosphate modified wood type polyurethane foam (designated as MWPU). Our strategy was to obtain liquefied pine-based polyol at an optimum reaction temperature and apply the polyol in

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Section: Liquefaction Yield and Hydroxyl Value Of Liqueed Wood Productssupporting

confidence: 90%

Liquefaction of waste pine wood and its application in the synthesis of a flame retardant polyurethane foam

et al. 2017

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“…Despite the slight increase of apparent density, all analyzed foams, independently from bio-polyol content, showed similar value of apparent density on the level of 41 ± 2 kg/m 3 . Authors of other works often observed noticeable increase of apparent density, while increasing share of bio-polyols from liquefaction process in polyol mixture [31]. Maintaining the apparent density of obtained materials at the same level can be considered very beneficial, because it does not require the incorporation of higher amounts of foaming agents.…”

Section: Resultsmentioning

confidence: 97%

The Study on Application of Biopolyols Obtained by Cellulose Biomass Liquefaction Performed with Crude Glycerol for the Synthesis of Rigid Polyurethane Foams

et al. 2017

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In this work rigid polyurethane foams (PUR) were obtained by replacement of 0-70 wt% of petrochemical polyol with biopolyol obtained via cellulose liquefaction in presence of crude glycerol. The foams with different content of a bio-polyol were prepared by single step method for NCO/OH ratio equals 1.5. The prepared materials were analyzed in terms of their morphology, chemical structure, thermal stability and basic physical and mechanical properties. The effects of photo-oxidative and thermo-oxidative aging on chemical structure, apparent density and mechanical properties of the biomass based rigid polyurethane foams were investigated and discussed.

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“…This process involves the cleavage of various chemical bonds in the biomass using an organic solvent. Different organic solvents such as polyhydric alcohols [5,6] phenol [7,8], ethylene carbonate [9,10], dioxane [11], ethanol [12], and acetone [13,14] have been used in wood liquefaction. The wood liquefaction technology essentially involves the chemical modification of wood by the esterification or etherification of the hydroxyl groups commonly found in the main components of wood, viz., high-molecular-weight cellulose, hemicellulose, and lignin.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Evaluation of Epoxy Resin Prepared from the Liquefied Product of Cotton Stalk

Tuohedi

Wang

2021

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Liquefaction of waste lignocellulosic biomass is a viable technology for replacing fossil fuels and meeting sustainable development goals. In this study, bio-based epoxy resins were prepared from polyhydric-alcohol-liquefied cotton stalk by glycidyl etherification. The cotton stalk was liquefied in a polyethylene glycol/glycerol cosolvent under H2SO4 catalysis. Epon 828 and cotton-stalk-based epoxy resins could be cured using methylhexahydrophthalic anhydride as the curing agent, and the curing process was exothermic. The thermal properties and tensile strength of cured resins were investigated to examine the effect of adding cotton-stalk-based resin on the performance of the copolymerized epoxy resin. Further, the liquefied-cotton-stalk-based epoxy resin was blended with Epon 828 at different ratios (10, 20, and 30 mass%) and cured with a curing agent in the presence of 2-methylimidazole catalyst. An increase in the peak temperature and a reduction in the heat of curing and activation energy of the Epon 828 epoxy resin was observed with increasing content of the cotton-stalk-based epoxy resin. The tensile strength (35.4 MPa) and elastic modulus (1.5 GPa) of the highly crosslinked cotton-stalk-based epoxy resin were equivalent to those of the petroleum-based epoxy resin Epon 828.

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Preparation of bio-polyols by liquefaction of hardwood residue and their application in the modification of polyurethane foams

Cited by 10 publications

References 24 publications

Liquefaction of waste pine wood and its application in the synthesis of a flame retardant polyurethane foam

Liquefaction of waste pine wood and its application in the synthesis of a flame retardant polyurethane foam

The Study on Application of Biopolyols Obtained by Cellulose Biomass Liquefaction Performed with Crude Glycerol for the Synthesis of Rigid Polyurethane Foams

Preparation and Evaluation of Epoxy Resin Prepared from the Liquefied Product of Cotton Stalk

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