Eco-friendly flame-retardant Xuan paper via layer-by-layer assembly organic/inorganic composite coating on pulp fiber

Positively charged chitosan (CS) and negatively montmorillonite (MMT) were layer-by-layer (LBL) assembled on Xuan paper pulp fiber to fabricate an organic/inorganic flame-retardant coating. The achieved a limiting oxygen index (LOI) value of 24.6% when the was treated by 20 bilayers (BLs) CS/MMT coating, its vertical flame properties also improved with less after-flame after-glow times compared untreated one. These results demonstrated that retardancy could be enhanced this composite Thermogravimetric (TG) analysis revealed LBL assembly coating thermal stability at higher temperature promoted char formation, showing obvious condensed phase retardant action. Scanning electron microscopy further confirmed formation formed stable covering layer. ink wetting property not influenced through treatment fibers CS MMT. This research provides new approach for without influencing using eco-friendly system.