Biobased Epoxy Nanocomposites Derived from Lignin-Based Monomers

Zhao, Shou; Abu‐Omar, Mahdi M.

doi:10.1021/acs.biomac.5b00670

Cited by 115 publications

(113 citation statements)

References 39 publications

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“…Several breakthroughs have previously been achieved [40][41][42] regarding the use of aromatic monomers obtained on reductive lignin depolymerization for polymer applications such as epoxy thermosets, polycarbonates and cyanate ester resins (see also Supplementary Note 13).…”

Section: Nature Catalysismentioning

confidence: 99%

Complete lignocellulose conversion with integrated catalyst recycling yielding valuable aromatics and fuels

et al. 2018

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Section: Nature Catalysismentioning

confidence: 99%

Complete lignocellulose conversion with integrated catalyst recycling yielding valuable aromatics and fuels

et al. 2018

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“…The highly aromatic structure of lignin and its ability to act as a polyol have made it a desired building block to produce lignin-based PUs. Some of the more common lignin-based polymeric materials are soft or rigid PU foams, epoxy resins, ligningrafted-polycaprolactone copolymers, and carbon fiber (Li and Ragauskas, 2012, Baker and Rials, 2013, Laurichesse and Avérous, 2013, Zhao and Abu-Omar, 2015. For most systems, it is desired to employ as much lignin into the polymeric material as possible to further increase targeted properties, use less petroleum-based chemicals, improve economics, and increase the biocompatibility of the material.…”

Section: Ligninmentioning

confidence: 99%

The Effect of Plant Source on the Properties of Lignin-Based Polyurethanes

2018

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This work increases our understanding of the effect of plant source on the mechanical and morphological properties of lignin-based polyurethanes (PUs). Lignin is a polymer that is synthesized inside the plant cell wall and can be used as a polyol to synthesize PUs. The specific aromatic structure of the lignin is heavily reliant on the plant source from which it is extracted. These results show that the mechanical properties of ligninbased PUs differ based on lignin's plant source. The morphology of lignin-based PUs was examined using atomic force microscopy and scanning electron microscopy and the mechanical properties of lignin-based PU samples were measured using dynamic mechanical analysis and shore hardness (Type A). The thermal analysis and morphology studies demonstrate that all PUs prepared form a multiphase morphology. In these PUs, better mixing was observed in the wheat straw lignin PU samples leading to higher moduli than in the hardwood lignin and softwood lignin PUs whose morphology was dominated by larger aggregates. Independent of the type of the lignin used, increasing the fraction of lignin increased the rigidity of PU. Among the different types of lignin studied, PU with wheat straw soda lignin exhibited storage moduli ~2-fold higher than those of PUs incorporating other lignins. This study also showed that during synthesis all hydroxyl groups in the lignin are not available to react with isocyanates, which alters the number of cross-links formed within the PU and impacts the mechanical properties of the material.

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“…On the other hand, in view of the depletion of petroleum resources and the environmental pollutions caused by wastes disposal, replacing petroleum‐based polymers with renewable feedstock has drawn great interests recently . Thermosets derived from biomass has also been reported, for instance, epoxy resins have been prepared from vegetable oil, lignin, plant phenol, and isosorbide . With optimal molecular design and processing, bio‐based epoxy resins can exhibit physical properties comparable with that of petrochemical‐derived counterparts, showing great promise in real applications.…”

Section: Introductionmentioning

confidence: 99%

Bio‐based epoxy vitrimers: Reprocessibility, controllable shape memory, and degradability

Wang

Zhu

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

194

147

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The research activities in the development of recyclable and reprocessable covalently crosslinked networks, and the construction of polymers from renewable resources are both stemmed from the economical and environmental problems associated with traditional thermosets. However, there is little effort in combination of these two attractive strategies in material designs. This article reported a bio‐based vitrimer constructed from isosorbide‐derived epoxy and aromatic diamines containing disulfide bonds. The resulted dynamic epoxy resins showed comparable thermomechanical properties as compared to similar epoxy networks cured by traditional curing agent. Rheological tests demonstrated the fast stress relaxation of the dynamic network due to the rapid metathesis of disulfide bonds at temperature higher than glass transition temperature. This feature permitted the recycling and reprocessing of the fragmented samples for several times by hot press. The dynamic epoxy resins also exhibited shape‐memory effect, and it is demonstrated that the shape recovery ratio could be readily adjusted by controlling the stress relaxation in the temporary state at programming temperature. Moreover, the degradability of the dynamic epoxy resins in alkaline aqueous solution was also demonstrated. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 1790–1799

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Biobased Epoxy Nanocomposites Derived from Lignin-Based Monomers

Cited by 115 publications

References 39 publications

Complete lignocellulose conversion with integrated catalyst recycling yielding valuable aromatics and fuels

Complete lignocellulose conversion with integrated catalyst recycling yielding valuable aromatics and fuels

The Effect of Plant Source on the Properties of Lignin-Based Polyurethanes

Bio‐based epoxy vitrimers: Reprocessibility, controllable shape memory, and degradability

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