木质导热材料的导热性能及强化导热机理研究
发布时间：2019-01-10 15:10
【摘要】：为减少地热供暖过程中的能源损耗,提高传热效率,开展木质导热材料的强化导热机理及性能研究。该研究以木质材料为主要原料,碳素材料为导热材料,采用纳米发热技术和人造板制造技术相结合的工艺制备导热木质复合材料,重点研究木质导热材料的工艺优化,强化导热机理及材料导热性能。研究表明:1)当石墨填充量15%、石墨粒径2 500目、偶联剂为钛酸酯时制备的导热材料其各项力学性能指标均达到国标GB/T 11718—2009《中密度纤维板》的要求。2)最优工艺条件下材料的导热系数为0.266 W/(m·K),与普通木质复合材料的导热系数0.045 W/(m·K)相比,增大了约5倍左右。3)相同热流量的条件下,热量传递至普通木质材料表面温度为41.5℃;传递到导热材料温度为47.95℃。因此,导热材料较普通材料的导热性能有明显的提高。
[Abstract]:In order to reduce energy loss and improve heat transfer efficiency in geothermal heating process, the enhanced heat conduction mechanism and performance of wood thermal conductive materials were studied. In this study, wood materials were used as main raw materials, carbon materials as heat conduction materials, and nano-heating technology combined with wood-based panel manufacturing technology to prepare heat-conductive wood composites. The emphasis was on the optimization of the technology of wood thermal conductive materials. Strengthen heat conduction mechanism and material thermal conductivity. The results show that: 1) when the graphite content is 15%, the diameter of graphite is 2 500 mesh. The mechanical properties of the thermal conductive materials prepared with titanate are up to the requirements of the national standard GB/T 11718-2009. 2) the thermal conductivity of the materials is 0.266 W / (m K), under the optimum technological conditions. Compared with the ordinary wood composites, the thermal conductivity of the composites is about 5 times higher than that of the ordinary wood composites. 3) under the same heat flow rate, the heat transfer to the surface temperature of the ordinary wood composites is 41.5 鈩，
本文编号：2406465
[Abstract]:In order to reduce energy loss and improve heat transfer efficiency in geothermal heating process, the enhanced heat conduction mechanism and performance of wood thermal conductive materials were studied. In this study, wood materials were used as main raw materials, carbon materials as heat conduction materials, and nano-heating technology combined with wood-based panel manufacturing technology to prepare heat-conductive wood composites. The emphasis was on the optimization of the technology of wood thermal conductive materials. Strengthen heat conduction mechanism and material thermal conductivity. The results show that: 1) when the graphite content is 15%, the diameter of graphite is 2 500 mesh. The mechanical properties of the thermal conductive materials prepared with titanate are up to the requirements of the national standard GB/T 11718-2009. 2) the thermal conductivity of the materials is 0.266 W / (m K), under the optimum technological conditions. Compared with the ordinary wood composites, the thermal conductivity of the composites is about 5 times higher than that of the ordinary wood composites. 3) under the same heat flow rate, the heat transfer to the surface temperature of the ordinary wood composites is 41.5 鈩，
本文编号：2406465
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