Flame-retardant, antibacterial, liquid-barrier, and wet-strength paper enabled by cellulosic fiber-derived additives

Cellulosic paper has combined characteristics of renewability, biodegradability, flexibility, and recyclability. Based on disassembly-initiated fiber processing, the conversion of regular paper into a multifunctional wetstrength product was explored. In this concept, disassembly generates cellulosic additives for surface engineering. Encouragingly, the use of the aqueous solvent system containing mixed metal salts allows controllable fiber disassembly and formation of room-temperature-stable cellulosic solutions, leading to wet and dry strengthening of paper following cellulose regeneration. In-situ generation of cellulosic film-forming additives led to the increase of dry and wet strengths by more than 8 and 35 times respectively, in the case of a typical grade of quantitative filter paper. The engineered paper shows flame-retardant, antibacterial, and liquid-barrier features. The combination of functional properties of cellulosic paper can shed light on diversified applications, e.g., replacement of difficult-to-degrade synthetic plastics.

Automated summary

Cellulosic paper, with its characteristics of renewability, biodegradability, flexibility, and recyclability, can be converted into a multifunctional wetstrength product through disassembly-initiated fiber processing. The disassembly process generates cellulosic additives for surface engineering, leading to the enhancement of dry and wet strengths by more than 8 and 35 times respectively. The engineered paper also exhibits flame-retardant, antibacterial, and liquid-barrier features, making it a potential replacement for difficult-to-degrade synthetic plastics.