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出 处:《材料导报》2016年第14期62-66,共5页Materials Reports
基 金:国家自然科学基金(31570572)
摘 要:以聚乙烯类基质作为支撑材料,石蜡作为相变剂,研究和制备了聚乙烯类/石蜡木塑相变储能材料。研究表明,当石蜡的添加量为25%时,HDPE、LDPE和LLDPE三种基质的石蜡木塑相变储能材料的拉伸强度分别下降了53.18%、60.48%、66.81%,弯曲强度分别下降了67.68%、62.24%、69.07%,力学性质下降均超过50%。性能测试得出HDPE的综合性能较好,在石蜡的添加量为20%时,HDPE、LDPE和LLDPE的相变温度分别为56.27℃、57.87℃、56.62℃,相变焓分别为125.85J/g、100.30J/g、124.65J/g。通过氯仿提取石蜡,研究聚乙烯类基质的包裹性能,结果表明不同的基质都解决了石蜡的渗漏问题。Polyethylene/paraffin phase change energy storage materials were prepared with wood-plastic as support materials and paraffin as the phase transformation unit. The mechanical properties were studied by tensile and flexural testing. The phase transition enthalpy was studied by differential scanning calorimetry (DSC). The thermal decomposition behavior of materials was studied by thermogravity analysis (TGA). When the ratio of paraffin was 25%, the tensile strength of paraffin wood-plastic phase change energy storage materials with substrates of HDPE, LDPE and LLDPE were decreased by 53. 18%, 60. 48% and 66. 81%, respectively. Flexural strength of the three kinds of materials were decreased by 67. 68%, 62. 24% and 69. 07%, respectively. Mechanical properties were decreased more than 50%. The results revealed that HDPE had better comprehensive properties than LDPE and LLDPE. When the ratio of paraffin was 20%, phase change temperatures of HDPE, LDPE and LLDPE were 56.27℃, 57. 87℃ and 56.62℃, and enthalpies of phase change were 125.85 J/g, 100.30 J/g and 124.65 J/g. The effect of polyethylene on the package effect of paraffin was studied through extracting paraffin by chloroform. The results showed that the leakage problem of paraffin could be solved with different polyethylene rnatrixs.
分 类 号:TQ314.248[化学工程—高聚物工业]
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