In this study, a fully bio-based coating was constructed by layer-by-layer deposition of chitosan (CS) and ammonium phytate (AP), to obtain fire-safety and antibacterial cotton fabrics. With about 8% weight gains of CS/AP coatings, the treated cotton fabrics self-extinguished in the vertical burning test. The data obtained from cone calorimetry showed CS/AP/cotton had much lower smoke and heat production, which indicated the fire safety of the fabrics was significantly improved for the presence of CS/AP coatings. The flame-retardant mechanism of this system was finally proposed according to the analysis of gaseous products and char residues. What is more, CS/AP coatings had higher antibacterial activity in Gram-negative bacteria and did improve the tensile strength of cotton fabrics compared with AP coating. With its ease of operation and use of non-toxic chemicals, this fully bio-based coating can further offer a feasible flame-retardant and antibacterial solution of the inflammable natural fabrics.

在这项研究中，通过壳聚糖（CS）和植酸铵（AP）的逐层沉积构建了完全基于生物的涂层，从而获得了防火和抗菌的棉织物。CS / AP涂层的重量增加了约8％，经过处理的棉织物在垂直燃烧测试中会自动熄灭。从锥形量热法获得的数据表明，CS / AP /棉具有较低的烟雾和热量产生，这表明存在CS / AP涂层时，织物的防火安全性得到了显着改善。通过对气态产物和炭渣的分析，最终提出了该系统的阻燃机理。此外，CS / AP涂层与革兰氏阴性细菌相比，具有更高的革兰氏阴性细菌抗菌活性，并确实提高了棉织物的拉伸强度。