【作者】 杨星； 姜维娜； 周晓燕； 徐莉；

【机构】 江苏省南京市南京林业大学；

【摘要】 利用锥形量热仪研究了杨木纤维/无机纳米Al2O3复合材料的热释放速率、总热释放量、有效燃烧热、质量损失速率、点燃时间等。实验结果表明,通过无机纳米Al2O3改性后,45s和175s出现的热释放峰值明显减弱,热释放速率明显降低,平均热释放速率下降了38%,热释放速率峰值下降了25%;总释放热下降了38%;175s的放热峰出现前,其有效燃烧值略低于空白纤维板材,并且两者都比较平缓;质量损失与燃烧时热释放速率同步;点燃时间延长了一倍。更多还原

【Abstract】 the Heat Release Rate(HRR)、Total Heat Release(THR)、Effective Heat of Combustion(EHC)、Mass Loss Rate(MLR)、TTI of the Medium Density Fiberboard(MDF) with the untreated wood fibers and MDF with the treated wood fibers by nano-Al2O3 were studied by the cone calorimeter. The cone calorimeter results showed that: (1) compared with the MDF with untreated wood fiber, the two heat release peaks(45s and 175s) of MDF with treated wood fibers weakened obviously, and the heat release rate(HRR) deceased considerably; average HRR values decreased by 38% while pkHRR decreased by 25%; (2) THR values of MDF with treated wood fibers dropped by 38%; (3) before the emergence of the second heat release peak(175s), EHC values of MDF with treated wood fibers were slightly lower than those of MDF with untreated wood fibers, and the curves of each other were both gentle; (4) the changing tends of curves of MLR were similar to those of HRR curves; (5) TTI increased twice.更多还原