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对采用热的良导体——碳纤维改善相变材料的热传导速率开展了研究.通过碳纤维与甘二烷的物理混合制备了相变复合材料.采用示差扫描分析法、热重分析法和差示热分析法测试了此相变复合材料的热性能.研究了碳纤维的掺量与长度对甘二烷热传导性能的影响.研究结果表明,碳纤维能有效地改善甘二烷的热传导速率,碳纤维的掺量和长度是2个主要的影响因素.随着碳纤维掺量的增加,甘二烷的储热、放热速率增加.掺入碳纤维后,甘二烷的熔点从40.2℃增加到50.8℃.当掺入6%的碳纤维后,升温所需时间从720s降至660s;当掺入10%的碳纤维后,升温所需时间从720s降至600s.
A study was conducted to improve the heat transfer rate of the phase change material by using a good conductor of heat - carbon fiber.The phase change composite material was prepared by physical mixing of carbon fiber and glyoxal.Differential scanning analysis, thermogravimetry and differential heat The thermal properties of the phase-change composites were tested by the analytical method.The effects of the amount and length of carbon fiber on the thermal conductivity of the glycol were studied.The results show that the carbon fiber can effectively improve the thermal conductivity of the glycol, the carbon fiber content And length are the two main influencing factors.With the increase of carbon fiber content, the heat storage and exothermic rate of glycerol increase.When carbon fiber is added, the melting point of glycerol increases from 40.2 ℃ to 50.8 ℃ .When the content of carbon fiber is increased, After 6% carbon fiber was added, the time required for heating was reduced from 720s to 660s. When 10% carbon fiber was added, the time required for heating was reduced from 720s to 600s.