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Designing Coconut Oil Encapsulated Poly(stearyl methacrylate‐co‐hydroxylethyl metacrylate) Based Microcapsule for Phase Change Materials
ChemistrySelect ( IF 1.9 ) Pub Date : 2019-05-06 , DOI: 10.1002/slct.201900340 Burcu Oktay 1 , Emre Baştürk 1 , Memet Vezir Kahraman 1 , Nilhan Kayaman Apohan 1
ChemistrySelect ( IF 1.9 ) Pub Date : 2019-05-06 , DOI: 10.1002/slct.201900340 Burcu Oktay 1 , Emre Baştürk 1 , Memet Vezir Kahraman 1 , Nilhan Kayaman Apohan 1
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Phase change material (PCM) is an effective energy storage application, which has a relatively low cost. In this study, bio‐based PCMs were prepared by using two techniques: encapsulation and UV‐curing. Encapsulated–PCM was synthesized by suspension polymerization with stearyl methacrylate (SMA) and hydroxyethyl methacrylate (HEMA). In encapsulation process, the microcapsules were prepared from poly(stearyl methacrylate‐co‐hydroxyethyl methacrylate) shell and coconut oil (CO) core. UV‐cured form stable PCM was also prepared by radical addition polymerization of stearyl methacrylate, hydroxyethyl methacrylate and coconut oil. In UV‐curing process as in the second process, coconut oil was trapped within the polymeric network without covalent bonding. Thermal storage feature of encapsulated‐PCM and UV‐cured form stable PCM was investigated. The melting enthalpy of encapsulated‐PCM is 119 J/g, which is higher than both the melting enthalpy of pure coconut oil (106 J/g) and UV‐cured form stable PCM (47 J/g). Moreover, thermal degradation results of PCMs show that the maximum thermal decomposition temperature of encapsulated‐PCM increased compared with UV‐cured from stable PCM.
中文翻译：
设计用于相变材料的椰子油封装的聚（甲基丙烯酸硬脂基酯-共-羟乙基甲基丙烯酸酯）微胶囊
相变材料（PCM）是一种有效的储能应用，具有相对较低的成本。在这项研究中，通过使用两种技术制备了基于生物的PCM：封装和UV固化。通过与甲基丙烯酸十八烷基酯（SMA）和甲基丙烯酸羟乙酯（HEMA）悬浮聚合来合成包封的PCM。在封装过程中，微胶囊是由聚（甲基丙烯酸硬脂基酯-甲基丙烯酸羟乙酯-共-羟乙基）壳和椰子油（CO）核制成的。还通过甲基丙烯酸十八烷基酯，甲基丙烯酸羟乙酯和椰子油的自由基加成聚合反应制备了紫外线固化的稳定型PCM。在第二步的紫外线固化过程中，椰子油被捕获在聚合物网络中而没有共价键。研究了封装的PCM和UV固化的PCM的热存储特性。包封的PCM的熔融焓为119 J / g，高于纯椰子油的熔融焓（106 J / g）和经紫外线固化的稳定PCM的熔融焓（47 J / g）。此外，PCM的热降解结果表明，与由稳定PCM进行紫外线固化相比，封装的PCM的最高热分解温度有所提高。
更新日期：2019-05-06
中文翻译：
设计用于相变材料的椰子油封装的聚（甲基丙烯酸硬脂基酯-共-羟乙基甲基丙烯酸酯）微胶囊
相变材料（PCM）是一种有效的储能应用，具有相对较低的成本。在这项研究中，通过使用两种技术制备了基于生物的PCM：封装和UV固化。通过与甲基丙烯酸十八烷基酯（SMA）和甲基丙烯酸羟乙酯（HEMA）悬浮聚合来合成包封的PCM。在封装过程中，微胶囊是由聚（甲基丙烯酸硬脂基酯-甲基丙烯酸羟乙酯-共-羟乙基）壳和椰子油（CO）核制成的。还通过甲基丙烯酸十八烷基酯，甲基丙烯酸羟乙酯和椰子油的自由基加成聚合反应制备了紫外线固化的稳定型PCM。在第二步的紫外线固化过程中，椰子油被捕获在聚合物网络中而没有共价键。研究了封装的PCM和UV固化的PCM的热存储特性。包封的PCM的熔融焓为119 J / g，高于纯椰子油的熔融焓（106 J / g）和经紫外线固化的稳定PCM的熔融焓（47 J / g）。此外，PCM的热降解结果表明，与由稳定PCM进行紫外线固化相比，封装的PCM的最高热分解温度有所提高。
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