采用层层自组方法在剑麻纤维素微晶(SFCM)表面吸附天然聚电解质壳聚糖(CH)和植酸(PA),构筑可再生CH/PA阻燃涂层,用Zeta电位、热重分析(TGA)、场发射扫描电镜(FESEM)、垂直燃烧测试(VFT)和燃烧量热仪(MCC)等手段对复合材料进行了表征.Zeta电位和FESEM结果显示,在CH和PA吸附过程中电位正负交替变化,SFCM表面局部位置被一层凸起的涂层包覆.TGA和FESEM结果表明,随着CH/PA层数的增加复合材料的初始分解温度由299℃降低至257℃,残炭率由5.41％提高至37.64％,SFCM(CH/PA)5的TG残炭物表面未出现螺旋状收缩,纤维素形貌基本上不变;VFT结果显示,SFCM(CH/PA)5续燃时间(39 s)比纯SFCM(150 s)缩短了111 s.MCC结果表明,SFCM(CH/PA)5的热释放速率峰值(pkHRR)和热释放总量(Total HR)与纯SFCM相比分别减少70.6％和79.2％,表明CH/PA涂层具有明显提高SFCM阻燃性能的作用.
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