生物基疏水阻燃剂的制备及在阻燃纸中的应用研究

Preparation of Bio-based Hydrophobic Flame Retardant and Its Application in Flame-retardant Paper

关键词:  阻燃纸  生物基阻燃剂  聚磷酸铵  疏水性

Key Words:flame-retardant paper  bio-based flame retardant  ammonium polyphosphate  hydrophobicity

摘要:利用生物基材料蛋清蛋白、植酸及柠檬酸（CA）对聚磷酸铵（APP）进行改性，制备了复合阻燃剂（APP@EP-CA）。将阻燃剂与纸浆共混制备阻燃纸，探讨了不同成分阻燃剂对纸张阻燃性能和综合性能的影响。结果表明，添加2.5 g的CA改性的阻燃剂（APP@EP-CA_2.5）在700℃时最终残余质量达48.4%，与APP相比热稳定性明显提高。与未添加阻燃剂的空白纸相比，添加APP@EP-CA_2.5的阻燃纸（Pulp-2.5）的极限氧指数（LOI）值从19.6%提高到40.8%，炭化长度仅为46 mm。与添加APP的阻燃纸相比，Pulp-2.5的热释放速率峰值由139.75 kW/m²降至88.85 kW/m²，总热释放量由32.03 MJ/m²降至24.21 MJ/m²，表明APP@EP-CA_2.5可以明显提高纸张的阻燃效果。另外，Pulp-2.5的抗张指数为47.8 N·m/g，接触角为108.5°，兼具良好的力学性能和疏水性能。

Abstract:The bio-based materials egg white protein， phytic acid and citric acid were used to modify ammonium polyphosphate （APP） to prepare the composite flame retardant （APP@EP-CA）. The flame-retardant paper was prepared by blending flame retardant with pulp， and the effects of different compositions of flame retardants on the flame retardant properties and comprehensive properties of paper were discussed. The results showed that the residual mass of APP@EP-CA_2.5 reached 48.4% at 700℃， which was significantly higher than that of APP. The LOI value of flame-retardant paper added with APP@EP-CA_2.5 （Pulp-2.5） increased from 19.6% to 40.8%， and the char length was only 46 mm.Compared with the flame-retardant paper added with APP， the peak heat release rate of Pulp-2.5 decreased from 139.75 kW/m² to 88.85 kW/m²， and the total heat release rate decreased from 32.03 MJ/m² to 24.21 MJ/m²， indicating that APP@EP-CA_2.5 could significantly improve the flame retardant effect of paper.In addition， Pulp-2.5 had a tensile index of 47.8 N·m/g and a contact angle of 108.5°， illustrating that it exhibited both good mechanical and hydrophobic property.