CAJ | 학술논문

将纳米氧化镁作为阻燃剂利用物理机械混合的方法加入到木粉中，经极限氧指数( LOI )、锥形量热仪( CONE)测试结果表明，纳米氧化镁能显著提高木制品的氧指数，燃烧过程中的热释放速率、热释放量、烟产生速率、总生烟量和CO产率明显降低，具有很好的阻燃效果。经计算纳米氧化镁的加入能够提高样品的残炭率，残炭率提高10%左右。其阻燃机理一方面是由于纳米氧化镁可以作为物理屏障层，起到耐高温绝热和隔绝氧气的作用；另一方面，纳米氧化镁会参与木材的燃烧，改变木材的裂解途径，残留有更多的不可燃物质。
장납미양화미작위조연제이용물리궤계혼합적방법가입도목분중，경겁한양지수( LOI )、추형량열의( CONE)측시결과표명，납미양화미능현저제고목제품적양지수，연소과정중적열석방속솔、열석방량、연산생속솔、총생연량화CO산솔명현강저，구유흔호적조연효과。경계산납미양화미적가입능구제고양품적잔탄솔，잔탄솔제고10%좌우。기조연궤리일방면시유우납미양화미가이작위물리병장층，기도내고온절열화격절양기적작용；령일방면，납미양화미회삼여목재적연소，개변목재적렬해도경，잔류유경다적불가연물질。
Nano magnesium oxide as flame retardant was added into wood powder by mechanical mixing, and the samples were tested by the limiting oxygen index(LOI),cone calorimeter(CONE). The test re-sults showed that nano magnesium oxide could improve the oxygen index of wood products. Meanwhile, heat release rate,total heat release,smoke production rate,total smoke rate and the yield of CO decreased obviously,and the samples had good flame retardant effect. The calculation of carbon residue ratio showed that adding nano magnesium oxide could improve the residual carbon sample ratio, which increased by 10%. The flame retardant mechanism, on the one hand, the nano magnesium oxide serve as a physical barrier layer,have a high temperature resistant and insulating effect and isolate the wood from oxygen;On the other hand,nano magnesium oxide can participate in the combustion of wood,change the wood pyroly-sis pathway and leave more flammable materials.