We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Wood−Derived Polymers from Olefin−Functionalized Lignin and Ethyl Cellulose via Thiol–Ene Click Chemistry
Summary
Researchers synthesized cross-linked polymers from olefin-functionalized ethyl cellulose and lignin via thiol-ene click chemistry, achieving olefin group concentrations of 2.81 mmol/g and 3.70 mmol/g respectively. The resulting cellulose cross-linked polymers reached a tensile stress at break of 23.59 MPa, with mechanical properties positively correlated with olefin group concentration and enhanced thermal stability attributed to ester group incorporation.
Lignin and cellulose derivatives have vast potential to be applied in polymer materials. The preparation of cellulose and lignin derivatives through esterification modification is an important method to endow cellulose and lignin with good reactivity, processability and functionality. In this study, ethyl cellulose and lignin are modified via esterification to prepare olefin-functionalized ethyl cellulose and lignin, which are further used to prepare cellulose and lignin cross-linker polymers via thiol-ene click chemistry. The results show that the olefin group concentration in olefin-functionalized ethyl cellulose and lignin reached 2.8096 mmol/g and 3.7000 mmol/g. The tensile stress at break of the cellulose cross-linked polymers reached 23.59 MPa. The gradual enhancement in mechanical properties is positively correlated with the olefin group concentration. The existence of ester groups in the cross-linked polymers and degradation products makes them more thermally stable. In addition, the microstructure and pyrolysis gas composition are also investigated in this paper. This research is of vast significance to the chemical modification and practical application of lignin and cellulose.
Sign in to start a discussion.
More Papers Like This
Bio-Based Crosslinked Polymers Synthesized from Functionalized Soybean Oil and Squalene by Thiol–Ene UV Curing
Bio-based crosslinked polymers were synthesized from functionalized soybean oil and squalene using thiol-ene UV curing, demonstrating a renewable-resource alternative to petroleum-based thermoset plastics with tunable mechanical properties.
Cellulosic Functional Bioplastic with Tunable Strength and Toughness Through Heat‐Treatment of Dynamic Covalent Networks
Researchers created a high-performance biodegradable film from cellulose and lignin using reversible chemical bonds that can be tuned through heat treatment. The material achieves impressive mechanical properties with tensile strength up to 52 MPa and elongation up to 545%, along with UV shielding and oxygen barrier capabilities. The study presents a scalable approach for producing recyclable bioplastics that could serve as sustainable alternatives to petroleum-based plastics.
Self-assembly fundamentals in the reconstruction of lignocellulosic materials: A review
This review examines the self-assembly behaviour of wood's main chemical components — cellulose, hemicellulose, and lignin — drawing on biosynthetic and industrial evidence to understand how these polymers organize into nanofibrils and other structured materials. The authors find that even after isolation, wood components retain residual self-organization tendencies that can be exploited for producing engineered barrier films, structural materials, and other bio-based products.
Bioinspired Crosslinked Nanocomposites of Polyvinyl Alcohol‐Reinforced Cellulose Nanocrystals Extracted from Rice Straw with Ethanedioic Acid
Researchers extracted cellulose nanocrystals (CNC) from rice straw and incorporated them into polyvinyl alcohol nanocomposites, finding that 3 wt% CNC loading significantly improved tensile strength by 60.4% and maximum degradation temperature to 287 degrees C, with crosslinking further enhancing tensile strength by 104.8% and thermal stability to 364 degrees C.
Nanocellulose Hybrid Lignin Complex Reinforces Cellulose to Form a Strong, Water-Stable Lignin–Cellulose Composite Usable as a Plastic Replacement
This study developed a strong, water-stable composite material made from cellulose and lignin extracted from agricultural waste (sugarcane bagasse), as an eco-friendly alternative to plastic. The lignin-cellulose composite showed dramatically improved wet strength compared to regular cellulose sheets, demonstrating potential as a biodegradable plastic replacement that would not generate persistent microplastic pollution.