"Recent Approaches to the Synthesis of Hydrogels From Lignocellulosic Biomass: A Review "

Abstract

To address the detrimental effects of non-biodegradable wastes on the environment and the health of living organisms, there is a growing interest in valorising renewable resources. Lignocellulosic biomass is an abundant and renewable resource from plants. It is non-toxic, biodegradable and has adjustable mechanical characteristics, making it promising for use in the manufacture of hydrogels. Hydrogels are insoluble water absorbents with a three-dimensional network structure that can hold a considerable amount of water. The production of hydrogels from lignocellulosic biomass is a step toward sustainability. The goal of this study is to highlight current methodologies for the synthesis of hydrogels from various lignocellulosic biomass polymers (cellulose, hemicelluloses and lignin) in their different forms. A variety of techniques have been developed to synthesise various types of hydrogels with specified qualities, such as compressive strength, solvent resistance, water holding capacity, tensile strength, and re-swelling ratios, among others, based on application requirements. The study reports on current methods for the synthesis of lignocellulosic biomass-based hydrogels in order to determine the optimum strategy depending on demand.

Rational Design of a Multifunctional Hydrogel Trap for Water and Fertilizer Capture: A Review

“…Chemically cross-linked hydrogels generally exhibit superior mechanical properties and enhanced stability compared to physically cross-linked hydrogels . Common chemical cross-linking methods can be categorized into two groups: one involves the formation of a hydrogel network through free radical polymerization of monomers under conditions involving chemical initiators, photo radiation, or high energy radiation; while the other entails the creation of a hydrogel network via a chemical reaction between high molecular weight polymers and multifunctional cross-linking agents …”

“…54 Common chemical cross-linking methods can be categorized into two groups: one involves the formation of a hydrogel network through free radical polymerization of monomers under conditions involving chemical initiators, photo radiation, or high energy radiation; 55 while the other entails the creation of a hydrogel network via a chemical reaction between high molecular weight polymers and multifunctional cross-linking agents. 56 2.1.2.1. Cross-Linking by Free Radical Polymerization.…”

Physicochemical Characterization of Vitis vinifera Pruning Shots from Mendoza, Argentina: Extraction of Lignocellulosic Products

“…[ 18 ] It is more hygroscopic than cellulose, and can be acting as a cementing material in the cell walls by acting as the supportive matrix for the cellulose nanofibrils. [ 18 ] Among its uses, it has been reported for the synthesis of hydrogels, [ 19 ] biofilms, [ 20 ] and food‐packaging materials. [ 20,21 ] In addition, some strategies to modify their physicochemical properties in biorefinery and paper industries have been studied.…”

3D Matrices for Enhanced Encapsulation and Controlled Release of Anti-Inflammatory Bioactive Compounds in Wound Healing

“…Cellulose-based hydrogels are especially distinguished by their excellent mechanical properties and thermal stability, while dextran-based hydrogels are highly hydrophilic and have a great ability to support cell adhesion and proliferation, but exhibit poor mechanical properties [ 13 , 14 , 15 , 16 , 17 , 18 ]. Thus, the combination of the unique properties of these two polysaccharide-based hydrogels can result in obtaining a perfect wound dressing material.…”