Biocompatible Cellulose-Based Superabsorbents for Personal Care Products

Personal care products are an inseparable part of urban society, but the widespread use of petroleum-based superabsorbent polymers (SAPs) poses significant environmental negative impact. To overcome this problem, we investigated the development of cellulose-based hydrogels through di-epoxide chemical crosslinking of cellulose/cellulose electrolytes in NaOH/Urea aqueous system. The aim was to exploit mechanical strength, hydrophilicity, non-toxicity, and biodegradability of cellulose as the absorbent core of personal hygiene products through a simple synthesis method. The synthesized cellulose materials significantly improved the absorption capacity of the gels by 220%, reaching up to 41 g/g. The absorption properties were influenced by the cellulose DS, crosslinking density, and fluid salinity. The hydrogels demonstrated a remarkable absorption capacity of synthetic urine (27 g/g) and underload conditions (12 g/g). Their non-cytotoxic and biodegradable nature showed their potential for the manufacturing of personal care products such as disposable diapers or daily pads.