Value-adding of organosolv lignin: Designing mechanically robust UV-resistant polymeric glass via ARGET ATRP

Huang, Weiqi; Wu, Mang; Liu, Wei; Hua, Zan; Wang, Zhongkai; Zhou, Liang

doi:10.1016/j.apsusc.2018.12.266

Cited by 39 publications

(9 citation statements)

References 47 publications

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“…In addition, the grafting monomers also render lignin desirable functions. 26 Free-radical polymerization, 27,28 ring-opening polymerization, 29,30 and living radical polymerization 31,32 have been reported for the preparation of graft copolymers. Among them, free-radical polymerization is the simplest and most effective method.…”

Section: Introductionmentioning

confidence: 99%

Grafting Polymerization of Long-Chain Hydrophobic Acrylic Monomer onto Lignin and Its Application in Poly(Lactic Acid)-Based Wholly Green UV Barrier Composite Films

et al. 2023

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The development of low-cost and high-performance bio-based composites derived from forestry waste lignin and polylactic acid has emerged as a topic of central attention. However, the weak compatibility between lignin and polylactic acid often resulted in high brittleness of the composites. Graft copolymerization is not only the most effective way to modify lignin but also can significantly improve the compatibility of lignin and polylactic acid. In this study, bio-based monomer lauryl methacrylate was grafted onto lignin by feasible radical polymerization to prepare lignin graft copolymers with excellent thermal stability and hydrophobicity, which are expected to improve the compatibility with polylactic acid. Wholly bio-based composites were prepared by compounding this graft copolymer with polylactic acid. The results showed that the crystallization ability of the composite was improved, and the highest crystallinity was increased from 6.42% to 17.46%. With addition of LG-g-PLMA lower than 9%, the thermal stability of the composites was slightly improved. At 5% copolymer addition, the elongation at break and tensile toughness of the composites increased by 42% and 36%, respectively. Observation of the frozen fracture surface of the composite by SEM found that wire drawing and ductile deformation appeared when a small amount of LG-g-PLMA was added. The thus prepared composites also showed excellent UV barrier properties. This approach provides a new idea for the high-value application of lignin.

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Section: Introductionmentioning

confidence: 99%

Grafting Polymerization of Long-Chain Hydrophobic Acrylic Monomer onto Lignin and Its Application in Poly(Lactic Acid)-Based Wholly Green UV Barrier Composite Films

et al. 2023

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“…Currently, the utilization of renewable resources to prepare catalysts, hydrogels, and elastomers has attracted growing interest due to the sustainability concerns [15][16][17][18][19]. Being the most abundant renewable aromatic polymers, lignins are usually underutilized as a byproduct in the paper manufacturing and biorefining industries [19,20]. Only less than 2% of industry lignins are converted into high value-added chemicals.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Lignin-Based Polyacid Catalyst and Its Utilization to Improve Water Resistance of Urea–formaldehyde Resins

et al. 2020

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In this study, a lignin-based polyacid catalyst was synthesized via two steps to enhance water resistance of urea–formaldehyde (UF) resins. The first steps involved a hydroxymethylation reaction to increase the hydroxyl content in lignin. Then, hydroxymethylated lignins were reacted with maleic anhydride to form maleated lignin-based polyacids. The acid groups were expected to function as acid catalysts to catalyze the curing process of UF resin. In order to elucidate the structural variation, 3-methoxy-4-hydroxyphenylpropane as a typical guaiacol lignin structural unit was used as a model compound to observe the hydroxymethylation and the reaction with maleic anhydride analyzed by 1H and 13C NMR. After the structural analysis of synthesized lignin-based polyacid by FTIR and 13C NMR, it was used to produce UF resin as an adhesive in plywood and medium density fiberboard (MDF) production, respectively. The results showed that when the addition of lignin-based polyacid was 5% in plywood, it could effectively improve the water resistance of UF resins as compared to commercial additive NH4Cl. It also exhibited a lower formaldehyde emission. Like plywood, lignin-based catalysts used in medium density fiberboard production could not only maintain the mechanical properties, but also inhibit the water adsorption of fiberboards.

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“…The structural characteristics and the presence of functional groups in the lignin, along with its great availability and lack of industrial use, make this polymer a promising and extremely interesting material to be screened in a wide range of applications. In fact, its use in areas such as electrochemistry, composites, catalysis, copolymerization, and extraction of added-value components, among others, has already been reported. The usage of lignin in adhesive research has also been extensively addressed recently due to its structural similitude to phenol-formaldehyde resins, which makes it a potential candidate for its use as a binder. , Nevertheless, both the lower reactivity and the smaller number of available reactive sites call into question the performance of lignin in certain applications, as is the case with the adhesion field…”

Section: Introductionmentioning

confidence: 99%

Solid-State Fermentation withStreptomycesas an Ecofriendly Route to Tune Lignin Properties and Its Use as a Binder in Adhesive Formulation

Blánquez

Borrero-López

Domínguez

et al. 2022

ACS Sustainable Chem. Eng.

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The herein work analyzes the compositional and structural modification of extracted lignins from both barley and wheat straws biologically pretreated with Streptomyces by solid-state fermentation with two different strains, MDG147 and MDG301. The results showed that the MDG301 strain promoted major lignin solubilization, especially for wheat straw and alkaline extraction, and simultaneously exhibited a higher hydrolytic enzymatic profile than MDG147. Furthermore, the substrates were submitted to soda pulping, and the chemical composition and structural characteristics of the extracted soda-lignins were analyzed by analytical standard methods, Fourier transform infrared spectroscopy, thermogravimetric analysis, and nuclear magnetic resonance. Generally, soda-lignins showed high purity, with the remaining carbohydrate content in agreement with enzymatic patterns. Moreover, Streptomyces strains produced structural modifications, including a major degradation of β-alkyl-aryl ether and C–C linkages of soda-lignins, as well as an enrichment of syringyl units. Furthermore, these modifications also increased the hydroxyl group content, increasing entanglement possibilities and H-bonding. The obtained soda-lignins were focused on as binders for the adhesive formulation, showing excellent adhesion results. Those adhesives based on lignin coming from barley straw exhibited the best performance in shear strength tests, whereas those extracted from wheat straw provided the maximum values in peeling essays.

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Value-adding of organosolv lignin: Designing mechanically robust UV-resistant polymeric glass via ARGET ATRP

Cited by 39 publications

References 47 publications

Grafting Polymerization of Long-Chain Hydrophobic Acrylic Monomer onto Lignin and Its Application in Poly(Lactic Acid)-Based Wholly Green UV Barrier Composite Films

Grafting Polymerization of Long-Chain Hydrophobic Acrylic Monomer onto Lignin and Its Application in Poly(Lactic Acid)-Based Wholly Green UV Barrier Composite Films

Synthesis of Lignin-Based Polyacid Catalyst and Its Utilization to Improve Water Resistance of Urea–formaldehyde Resins

Solid-State Fermentation withStreptomycesas an Ecofriendly Route to Tune Lignin Properties and Its Use as a Binder in Adhesive Formulation

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