Porous carbon materials derived from plant biomass offer great promise towards developing sustainable and advanced renewable for energy applications. Lignin is as an abundant aromatic biopolymer with high content chemical functionality crosslinking, which make lignin a promising alternative environmentally-friendly aerogel production. In this study, aerogels were produced using industrial softwood kraft isolated forest resources. Crosslinked gels synthesized epoxy compound converted into...

The demand for low-cost carbon fibers with exceptional mechanical properties continues to grow across various industries. Bitumen-derived asphaltenes have emerged as a promising alternative polyacrylonitrile (PAN), yet are complex mixture of compounds, and the fundamental understanding which melt spinnable is not clearly understood. In this study, we utilized three distinct types asphaltenes, each exhibiting notably thermal softening temperatures (Ts) aromaticity. optimal processing...

Surface modification of electrospun lignin nanofibres with poly(<italic>N</italic>-isopropylacrylamide) (PNIPAM) was conducted through surface-initiated atom transfer radical polymerization (ATRPase) using various biocatalysts under aqueous conditions.

Oxidative thermal stabilization is considered a critical process before carbonization to prevent fusion of fibers, while aiding in the formation homogeneous fiber cross sections during carbon manufacturing. In this study, we investigated impact nanocrystalline cellulose (NCC) on thermal, electrical, and mechanical properties electrospun lignin-derived nanofibers when oxidative step was skipped. Results showed that by adding small amounts NCC (up 5 wt %), uniform lignin-based were prepared...

The complexity and polydispersity of lignin, the most abundant aromatic polymer in nature, create great challenges for its valorization value-added materials products. Reducing heterogeneity industrial lignin identifying structure–property relationships are a necessity to achieve predictable high performance polymeric applications. In this study, simple one-step solvent extraction method using an solvent, acetone, was presented as tool improve homogeneity softwood kraft (SKL). effect acetone...

Introducing vinyl groups onto the backbone of technical lignin provides an opportunity to create highly reactive renewable polymers suitable for radical polymerization. In this work, chemical modification softwood kraft was pursued with etherification, followed by direct esterification acrylic acid (AA). first step, phenolic hydroxyl and carboxylic were derivatized into aliphatic using ethylene carbonate alkaline catalyst. The subsequently fractionated a downward precipitation method recover...

An aqueous biopolymer dispersion coating system was synthesized utilizing softwood kraft lignin and a long chain organic acid. The chemical treatment of two-step procedure, which first consisted hydroxyethylation the phenolic groups on ethylene carbonate an alkaline catalyst. This step resulted in containing more than 80% aliphatic hydroxyl functionality (1H NMR). Following this step, oleic acid reacted with hydoxyethyl order to form ester derivatives. With nearly total reduction absorbance...

The limited utilization of reliable tools and standards for determination the softwood kraft lignin molar mass corresponding molecular conformation hampers elucidation structure-property relationships lignin. At issue, conventional size exclusion chromatography (SEC) is unable to robustly measure because a lack calibration with similar structure In present work, absolute acetylated technical was revisited utilizing SEC combined multi-angle light scattering band pass filter suppress...

Shape recoverable and ultralight materials have received significant attention for multifunctional applications, emulate the performance found in natural materials.

Polyurethane foams (PUFs) with renewable technical lignin additives have received both academic and industrial interest, justifying the need for further elucidation of their structure–property relationships. In this study, four types were mixed polyester polyols at different substitution levels (10–25% wt). After thorough characterization using NMR GPC, viscosity measurements polyol mixtures indicated a positive correlation between functional groups (COOH aliphatic OH) miscibility. The...

CTAB-hydrophobized lignin nanoparticles for durable Pickering foam formation with cellulose nanofibrils as templates lightweight porous materials.

Abstract Semi‐interpenetrating network hydrogel films were prepared using hemicellulose and chemically crosslinked chitosan. Hemicellulose was extracted from aspen by a novel alkaline treatment characterized HPSEC, consisted of mixture high low molecular weight polymeric fractions. HPLC analysis the acid hydrolysate showed that its major constituent sugar xylose. X‐ray relative crystallinity hydrogels increased with increasing content up to 31.3%. Strong intermolecular interactions between...

Functionalized cellulose nanocrystals (CNC) have unique properties that make them attractive in various applications such as drug delivery, hydrogels, and emulsions. However, the predominant chemical methods currently used to functionalize a large environmental footprint. Although greener are desirable, relatively inert nature of crystals presents major challenge their potential modification aqueous media. In work reported here, carbohydrate binding modules (CBMs) were introduce new...