As one of the key raw materials that replace petroleum materials in today‘s world, biomass resources could be regarded as a promising resource. Currently, lignin and its derivatives are the only lignocellulosic biomass found to possess aromatic rings. Extending the application area of lignin requires overcoming the limitations of its low hydrophilicity. Sulfonation process becomes the most effective method for preparing lignosulfonates. An analysis of the mechanisms by which different lignosulfonates are prepared. It compared the effects of various modification methods on charge density and sulfonate group content in lignosulfonates. It also examined how different separation techniques affect the properties of lignosulfonates. As a result of being more water‐soluble, there is also a review of cutting‐edge research in the fields of energy, medicine, and agriculture. Also, the possible uses of lignosulfonate are talked about, and ideas are given for how this compound could be improved in the future.

The fabrication of biodegradable superabsorbent hydrogels (SAHs) with a high absorption capacity and robust gel strength at an acceptable cost remains challenging. In this study, a series of hyperbranched polyether crosslinkers were designed and employed as effective crosslinkers to create feasible, high-performance superabsorbent hydrogels that are environmentally friendly. The hydrogel materials achieved greater strength compared with traditional hydrogels by using hyperbranched polyether to create a homogenous and strongly crosslinked polymer network. In addition, it was determined that the addition of modified sodium lignosulfonate improved several characteristics of traditional hydrogels, including the absorption and fixation of water, and that the produced hydrogels have good antibacterial properties. According to an analysis of the structure–activity relationship, the resultant SAHs achieve greater saturated gel strength (∼2 kPa) and swelling capacities (91.6 g/g in normal saline) compared with commercial products. This study provides a promising approach for the fabrication of biodegradable SAHs owing to its varied engineering applications, low cost, and good environmental profile.