Abstract In the present work, electrospun Kraft lignin/cellulose acetate nanostructures were produced, assessed and proposed as structuring or thickening agents of castor oil for lubricating applications. Solutions lignins (KL) derived from different sources (eucalyptus, poplar olive tree pruning) cellulose (CA) prepared used feed electrospinning. The rheological properties (shear extensional v...

In order to better understand bacterial depolymerization of lignin, a new analytical approach was proposed using Pseudomonas putida KT2440 as delignifying bacterium and Escherichia coli non-delignifying control. Two different types lignins, technical Kraft lignin synthetic dehydrogenopolymer (DHP), were submitted bioconversion kinetic study over 7 days. The concomitant analysis the supernatant ...

Abstract To address the efficient resourcefulness of papermaking wastewater, this study designed a super-efficient gel material (SGPQG/SGPQ) that could remove over-10-times masses lignins from and subsequently realized highly-efficient reuse wastes. The mass lignin removed by per unit SGPQG/SGPQ was 10,157.71 mg•g -1 , i.e., 10.16 times itself, which 1.23-50.55 better than existing similar mate...

Background: Fusions of dioxygenase and CBMs have been predicted in cellulolytic microbes. Results: SACTE_2871 is unique two-domain enzyme that reacts with caffeoyl-CoA and shows preferential binding to synthetic lignins. Conclusion: SACTE_2871 is an intradiol dioxygenase that is targeted to growing surfaces of lignin. Significance: SACTE_2871 can destroy precursors needed by the plant for de no...

Valorization of industrial low-value side-streams are great interest, contributing to boosts in the circular economy. In this context, lignin pulp and paper industry were oxypropylated produce biobased polyols tested synthesis rigid polyurethane (RPU) foams. E. globulus lignins, namely a isolated from an Kraft black liquor depolymerized lignins obtained as by-products oxidation process, used. R...

Peroxidase/H2O2-mediated radical coupling of 4-hydroxycinnamaldehydes produces 8-O-4-, 8-5-, and 8-8-coupled dehydrodimers as has been documented earlier, as well as the 5-5-coupled dehydrodimer. The 8-5-dehydrodimer is however produced kinetically in its cyclic phenylcoumaran form at neutral pH. Synthetic polymers produced from mixtures of hydroxycinnamaldehydes and normal monolignols provide ...

An efficient organocatalytic method for chemoselective aerobic oxidation of secondary benzylic alcohols within lignin model compounds has been identified. Extension to selective oxidation in natural lignins has also been demonstrated. The optimal catalyst system consists of 4-acetamido-TEMPO (5 mol %; TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxyl) in combination with HNO3 and HCl (10 mol % each)...

Kraft pulping, organosolv process and acid hydrolysis were applied on an elm clone. The solubilized lignins recovered analyzed. pulping led to with higher phenolic OH content as result of extensive cleavage ?-O-4? linkages, revealed by 13C solid state 13C?1H heteronuclear single quantum coherence nuclear magnetic resonance. This depolymerization also yielded lower molecular weight inferred size...