Bamboo and High Density Polyethylene Composite with Heat-Treated Bamboo Fiber: Thermal Decomposition Properties
Bamboo and High Density Polyethylene Composite with Heat-Treated Bamboo Fiber: Thermal Decomposition Properties
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DOI：
10.15376/biores.8.1.900-912
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发表时间：
2013-01
期刊：
影响因子：
1.5
通讯作者：
Yanjun Li;Lanxing Du;Chiharu Kai;Runzhou Huang;Qinglin Wu
中科院分区：
文献类型：
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作者：
Yanjun Li;Lanxing Du;Chiharu Kai;Runzhou Huang;Qinglin Wu
控制温度下的热处理有助于提高竹子的耐久性和尺寸稳定性。处理可能同时影响竹纤维（BF）的热性能和力学性能。本工作的目的是研究热处理温度对热处理BF和所得聚合物复合材料的热分解动力学性能的影响，使用动态热重分析在氮气下。退化模型，包括基辛格和Flynn-Wall-Ozawa方法被用来确定各种材料的表观活化能（Ea）。结果表明，热处理后高炉煤气的热分解主要发生在245 ℃ ~ 354 ℃之间。Ea的值从161到177 kJ/mol变化，并随着纤维的热处理温度的增加而增加。热处理后的BF/HDPE共混物的热分解主要发生在307 ℃ ~ 483 ℃的温度范围内。Ea值在225 ~ 236 kJ/mol之间，随纤维热处理温度的升高而降低。所建立的热分解动力学参数可为热处理竹材制备高分子复合材料提供参考。
Heat treatment under controlled temperatures can help enhance bamboo's durability and dimensional stability. The treatment may simultaneously affect thermal and mechanical performance of bamboo fibers (BFs). The aim of this work was to study the effect of heat treating temperature on thermal decomposition kinetic properties of heat-treated BFs and resulting polymer composites using dynamic thermo-gravimetric analysis under nitrogen. Degradation models including the Kissinger and the Flynn-Wall-Ozawa methods were used to determine the apparent activation energy (Ea) of various materials. The results indicated that the thermal decomposition of the heat-treated BFs mainly occurred within a temperature range between 245oC and 354oC. The values of Ea varied from 161 to 177 kJ/mol and increased with increased heat treating temperatures for the fibers. The thermal decomposition of the heat-treated BF and high density polyethylene blends mainly occurred within a temperature range of 307oC and 483oC. The values of Ea were between 225 and 236 kJ/mol and decreased with the increase of fiber heat-treating temperatures. The established thermal decomposition kinetic parameters can help aid the development of polymer composites from heat-treated bamboo materials.