Imine-linked micron-network polymers with high polyethylene glycol uptake for shaped-stabilized phase change materials
Imine-linked micron-network polymers with high polyethylene glycol uptake for shaped-stabilized phase change materials
复制标题
具有高聚乙二醇吸收率的亚胺连接微米网络聚合物，用于形状稳定的相变材料
DOI：
10.1039/c6ra05283e
复制
发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Wang, Ge
中科院分区：
文献类型：
--
作者：
Tang, Jia;Fan, Shuang;Wang, Ge
通过四臂醛与芳香族二胺的亚胺缩合反应，合成了具有高自由孔率(高达89.6%)的微米级网络聚合物NP-A和NP-B。同时，将聚乙二醇型网络聚合物引入聚乙二醇型网络聚合物中，制备了新型的聚乙二醇型网络聚合物形状稳定相变材料。用扫描电子显微镜、傅里叶变换红外光谱、固体~(13)C核磁共振谱、X射线衍射仪和热重分析系统地研究了网络聚合物和单质相变材料的结构和形态。实验结果表明，C-O-C官能团与聚乙二醇相似的网络聚合物与聚乙二醇6000具有良好的界面结合性能。NP-A和NP-B的比较表明，较小的间隙可以产生更强的相互作用，从而提高聚乙二醇单分子在网络聚合物中的吸附能力。微米级网络聚合物具有较高的自由孔和足够大的间隙，对聚乙二醇有很好的吸附能力(高达85wt%)，即使在熔点以上也没有泄漏。微米网络中的聚乙二醇保持了较高的结晶度，保证了相变材料的潜热(高达164.9 J g−1)接近计算值(168.9 J g−1)。这项工作为制备高储能密度的相变储能材料开辟了新的途径。
Micron-network polymers, NP-A and NP-B with high free porosities (up to 89.6%) were synthesized via imine condensation between tetra-arm aldehyde and aromatic diamines. In the meantime, novel polyethylene glycol (PEG)@network polymer shape-stabilized phase change materials (ssPCMs) were prepared by introducing PEG into the network polymers. The structure and morphology of the network polymers and the ssPCMs were systematically studied by SEM, FT-IR, solid-state 13C NMR, XRD and TGA. The experimental results showed that the network polymers with similar C–O–C functional groups to PEG exhibited good interface combination with PEG-6000 in ssPCMs. A comparison of NP-A and NP-B indicated that a smaller interstitial space induced much stronger interactions, which could promote the adsorption capacity of PEG in network polymers. With high free porosities and large enough interstitial space, the micron-network polymers exhibited good adsorption capacity for PEG (up to 85 wt%) without leakage even above its melting point. The PEG in the micron-network kept its high crystallinity that guaranteed the latent heat (up to 164.9 J g−1) of the ssPCMs close to the calculated values (168.9 J g−1). This work opens up alternative routes to prepare ssPCMs with high energy storage density for latent heat energy storage (LTES).