Pretreatment of lignocellulosic biomass: A review on recent advances.

Green synthesis of gamma-valerolactone (GVL) through hydrogenation of biomass-derived levulinic acid using non-noble metal catalysts : A critical review

Renewable and biodegradable materials derived from biomass are attractive candidates to replace non-biodegradable petrochemical plastics. However, the mechanical performance and wet stability of biomass are generally insufficient for practical applications. Herein, we report a facile in situ lignin regeneration strategy to synthesize a high-performance bioplastic from lignocellulosic resources (for example, wood). In this process, the porous matrix of natural wood is deconstructed to form a homogeneous cellulose–lignin slurry that features nanoscale entanglement and hydrogen bonding between the regenerated lignin and cellulose micro/nanofibrils. The resulting lignocellulosic bioplastic shows high mechanical strength, excellent water stability, ultraviolet-light resistance and improved thermal stability. Furthermore, the lignocellulosic bioplastic has a lower environmental impact as it can be easily recycled or safely biodegraded in the natural environment. This in situ lignin regeneration strategy involving only green and recyclable chemicals provides a promising route to producing strong, biodegradable and sustainable lignocellulosic bioplastic as a promising alternative to petrochemical plastics. There is growing interest in the development of biodegradable plastics from renewable resources. Here the authors report an in situ process involving only green chemicals to deconstruct natural wood, forming lignocellulosic bioplastics that are mechanically strong, stable against water and sustainable.

A strong, biodegradable and recyclable lignocellulosic bioplastic

Green solvents are one of the hot topics of green chemistry Ionic liquids (ILs) and deep eutectic solvents (DESs) are deemed as green solvents to a certain extent, and they have been applied in many areas, such as dissolution, separation, catalysis, electrochemistry and material synthesis However, the greenness of ILs and DESs should be revisited because more and more evidences have shown that they are not always green In this perspective, besides the reported merits, the disadvantages and problems of some ILs and DESs, such as instability, volatility, hygroscopicity, toxicity, flammability, regenerability, cost, energy consumption and impurities are discussed Moreover, 13 strategies to avoid the disadvantages of ILs and DESs and to increase the greenness are proposed Comparison of the greenness of ILs and DESs is further conducted This perspective provides some new viewpoints on the greenness of ILs and DESs

Revisiting greenness of ionic liquids and deep eutectic solvents

Lignin, as the most abundant aromatic biopolymer in nature, has attracted great attention due to the complexity and richness of its functional groups for value-added applications. The yield of production of lignin and the reactivity of prepared lignin are very important to guarantee the study and development of lignin-based chemicals and materials. Various fractionation techniques have been developed to obtain high yield and relatively high-purity lignin as well as carbohydrates (hemicelluloses and celluloses) and to reduce the condensed and degraded nature of conventional biorefinery lignin. Herein, novel and efficient biomass fractionation and lignin fractionation towards lignin valorization are summarized and discussed.

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Biomass Fractionation and Lignin Fractionation towards Lignin Valorization

Valorization of levulinic acid over non-noble metal catalysts: challenges and opportunities

Novel deep eutectic solvents with different functional groups towards highly efficient dissolution of lignin

Carbon dots enhanced gelatin/chitosan bio-nanocomposite packaging film for perishable foods

Lignin dissolution is of great importance for the valorization of lignin, and development of novel efficient solvent systems is a crucial topic. Herein, 17 kinds of 1,5-diazabicyclo[5.4.0]-5-undece...

Qiaoling Liu

Papers

Valorization of levulinic acid over non-noble metal catalysts: challenges and opportunities

Novel deep eutectic solvents with different functional groups towards highly efficient dissolution of lignin

Carbon dots enhanced gelatin/chitosan bio-nanocomposite packaging film for perishable foods

Highly Efficient Dissolution of Lignin by Eutectic Molecular Liquids

Dialdehyde xylan-based sustainable, stable, and catalytic liquid metal nano-inks