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月桂酸-十四醇二元复合相变材料的相变特性 被引量:16
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作者 蔡伟 孙志高 +3 位作者 马鸿凯 张爱军 李成浩 王茂 《太阳能学报》 EI CAS CSCD 北大核心 2017年第9期2493-2497,共5页
为了获得适合在建筑领域应用的相变材料和相变温度,以月桂酸(LA)和十四醇(TD)为原料,采用熔融共混法制备一系列二元酸-醇相变材料。采用步冷曲线法测定不同组分二元相变材料的结晶温度,通过绘制的相图确定二元体系低共晶点,LA-TD二元体... 为了获得适合在建筑领域应用的相变材料和相变温度,以月桂酸(LA)和十四醇(TD)为原料,采用熔融共混法制备一系列二元酸-醇相变材料。采用步冷曲线法测定不同组分二元相变材料的结晶温度,通过绘制的相图确定二元体系低共晶点,LA-TD二元体系在23.1℃达到共晶点;采用红外光谱(FTIR)表征复合相变材料的结构,表明复合相变材料中LA与TD通过分子间作用力结合在一起;采用DSC差示扫描量热法测量LA-TD混合物的相变温度及相变潜热,低共晶物的相变起始温度为24.46℃,相变潜热达到150.45 J/g,经300次0~60℃冷热循环后热稳定性良好。 展开更多
关键词 相变 复合材料 月桂酸 十四醇 相变特性
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Intersheet Distance Modeling and Thermal Characterization of New Micro/Nano-Composites Composed by Clay Matrix and PEG 6000 Addition
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作者 Iatimad Akhrif Mostapha El Jai +1 位作者 Laila Mesrar Raouf Jabrane 《Open Journal of Civil Engineering》 2016年第4期577-594,共19页
Nowadays, the energetic efficiency becomes one of the major interests of the global society. Thus, the energetic challenges of the new century enforce the scientific and industrial environment to the development of ne... Nowadays, the energetic efficiency becomes one of the major interests of the global society. Thus, the energetic challenges of the new century enforce the scientific and industrial environment to the development of new efficient materials, which present more than the classical thermal properties, according to the energy storage, energy consumption and other specific needs. In this context, the present work constitutes the third step of the development of a new kind of composite materials (micro-composites and nano-composites), using natural marl (clay) clay and biodegradable polymer, which is the PolyEthylene Glycol 6000 (PEG 6000). This step corresponds to characterization of the variation of the specific heat (denoted Cp) of the materials elaborated. So, in order to estimate the capacity of thermal energy adsorption, we utilized a SHIMATZU-DSC 60 Differential Scanning Calorimeter. The main results present the evolution of the Cp according to the PEG 6000 doping and also the specific melting enthalpy of the polymer within the natural clay matrix;by the way this enthalpy constitutes the specific heat stocked in the materials. 展开更多
关键词 Kaolinite/Illite Micro and Nanocomposite/Clay Matrix phase chage Materials PolyEthylene Glycol 6000 Thermal Analysis DRX Characterization Differential Scanning Calorimetery Transformation Enthalpy Latent Heat
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