Biolignin™ based epoxy resins

Delmas, Guo-Hua; Benjelloun-Mlayah, Bouchra; Bigot, Y. Le; Delmas, M.

doi:10.1002/app.37921

Cited by 55 publications

(38 citation statements)

References 13 publications

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“…This result shows that there are as many carboxylic groups in wheat straw lignin as phenolic groups. 20 The presence of carboxylic group may be interesting for other chemical reaction based on lignin. Figure 9 Results obtained of acetylated wheat straw lignin GPC analysis in THF.…”

Section: 23mentioning

confidence: 99%

“…Figure 9 Results obtained of acetylated wheat straw lignin GPC analysis in THF. 20 Proposed structures of CIMV wheat straw lignin's fragments…”

Section: 23mentioning

confidence: 99%

“…The final results for the quantification of hydroxyl content of wheat straw lignin 20 are regrouped in Table III. The chemical functionality of wheat straw lignin is represented by the free aliphatic hydroxyl and also phenolic hydroxyl groups.…”

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confidence: 99%

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Functionality of wheat straw lignin extracted in organic acid media

Delmas

Benjelloun-Mlayah

Bigot

et al. 2011

J of Applied Polymer Sci

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Wheat straw lignin was extracted by the CIMV process using organic acid media at pilot plant scale. The product was analyzed by gel permeation chromatography (GPC), 1H and 13C NMR spectroscopy, infrared attenuated total reflectance‐Fourier transform infrared analysis (ATR‐FTIR), and gas chromatography (GC) to clarify its structure and functionality. In most cases, lignin was esterified before analysis. Control of the esterification was conducted via ATR‐FTIR and NMR. GC analysis was used to quantify total hydroxyl group of lignin by saponification of propionylated lignin and was also used to quantify phenolic hydroxyl groups of lignin by aminolysis of propionylated lignin. Acetylated lignin was analyzed by GPC. Carboxylic group of lignin was determined by pH metric titration. Lignin extracted from the CIMV process was observed as a low molecular weight polymer with a low polydispersity index and high free hydroxyl content. The potential of lignin as a natural polyphenol was confirmed by the analytical results obtained. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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Section: 23mentioning

confidence: 99%

“…Figure 9 Results obtained of acetylated wheat straw lignin GPC analysis in THF. 20 Proposed structures of CIMV wheat straw lignin's fragments…”

Section: 23mentioning

confidence: 99%

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Functionality of wheat straw lignin extracted in organic acid media

Delmas

Benjelloun-Mlayah

Bigot

et al. 2011

J of Applied Polymer Sci

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“…It is reported that organosolv lignin [143][144][145][146] and kraft lignin [147][148][149] could be modified upon reaction with several epoxylated polyethylene glycol (PEG) derivatives. To reduce the cost of preparation, the modification was also carried out using kraft cooking black liquors, since the alkali species were retained and acted as catalysts [149].…”

Section: Etherificationmentioning

confidence: 99%

Conversion of technical lignins to functional materials with retained polymeric properties

Matsushita

2015

J Wood Sci

156

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A significant amount of technical lignins is produced in the pulp and paper industries. However, most technical lignins are burned for thermal recycling and a few percent are used as materials, such as lignosulfonate as a dispersant. Native lignin has a highly complex structure and is susceptible to structural variations depending on the pulping process, thus hindering the effective utilization of lignins. The procedures used to convert lignins into functional materials include depolymerization to monomeric fragments followed by re-building to functional materials, and chemical modifications to generate functional polymers with retained polymeric properties. In this paper, the latter is disserted. The characteristics of technical lignins, which include kraft lignin, lignosulfonate, and organosolv lignin, and their conversion to functional materials such as polyesters, polyethers, polyurethanes, etc. and the applications of lignin-based materials in some fields are discussed.

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“…Blending with thermoset and thermoplastic polymer constitutes another opportunity for further conversion of lignin into valuable products. Examples are reported of the use of lignin in copolymers doped by carbon nanotubes for chemical sensors applications [18] or to substitute bisphenol-A in epoxy resin [19]. The scientific literature reports a number of studies dealing with the evaluation of the effect of lignin in the blend with polyvinylacetate [20], polyethylene and polypropylene [21,22].…”

Section: Introductionmentioning

confidence: 98%