In this work, hyperbranched polyurethane elastomer (HBPUE) electrolyte and aluminum foil (Al) were joined together by anodic bonding. It provides a possibility for packaging of flexible devices to use anodic bonding. The HBPUEs were designed and prepared via prepolymerization method cured at room temperature using polypropylene glycol (PPG), toluene-2,4-diisocyanate(TDI), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and the varying ratios of trimethylolpropane (TMP)/1,4-butanediol (BDO). All HBPUEs prepared exhibited low glass transition temperature (T_g) and good thermal stability. The highly branched structures increase the proportion of amorphous phase of HBPUEs, resulting in a high ionic conductivity with a highest value of 2.38 × 10⁻⁴ S cm⁻¹ at 70 °C when adding TMP and BDO at the ratio of 0.45:0.45 (HBPUE3). There are no obvious diffraction peaks of the LiTFSI in the XRD patterns, indicating that LiTFSI was dissolved in polyurethane matrix completely. XRD results show that the structures of PEO-PUEs are amorphous. The HBPUEs prepared have good mechanical properties that can be used as packaging material. After bonded, the microstructures of the bonded interface between HBPUE and Al with a clear intermediate bonding layer could be observed by the cross-sectional scanning electron microscopy (SEM) images, and the elements diffused were also detected by the energy-dispersive spectrometer (EDS), indicating that the HBPUEs and Al were bonded together successfully. The maximum tensile strength for HBPUE3/Al was up to 1.15 MPa. All results demonstrated that the HBPUEs prepared would be a promising packaging material for flexible devices applied to anodic bonding.

中文翻译：

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基于TMP的超支化聚氨酯弹性体（HBPUE）包装材料，用于阳极粘合

在这项工作中，超支化聚氨酯弹性体（HBPUE）电解质和铝箔（Al）通过阳极结合在一起。它提供了一种包装柔性设备以使用阳极结合的可能性。通过在室温下使用聚丙二醇（PPG），甲苯-2,4-二异氰酸酯（TDI），双（三氟甲磺酰基）酰亚胺锂（LiTFSI）和不同比例的三羟甲基丙烷（TMP）/ 1,4-丁二醇（BDO）。制备的所有HBPUE均显示出低的玻璃化转变温度（T _g）和良好的热稳定性。高度支化的结构增加了HBPUEs非晶相的比例，导致高离子电导率，最高值为2.38×10 ^-4 S cm ^-1当以0.45：0.45（HBPUE3）的比例添加TMP和BDO时，温度为70°C。X射线衍射图中LiTFSI没有明显的衍射峰，表明LiTFSI完全溶解在聚氨酯基体中。XRD结果表明，PEO-PUE的结构是无定形的。制备的HBPUE具有良好的机械性能，可用作包装材料。结合后，通过截面扫描电子显微镜（SEM）图像可以观察到HBPUE和Al之间具有清晰的中间结合层的结合界面的微观结构，并且还通过能量分散光谱仪（EDS）检测了扩散的元素），表明HBPUE和Al已成功键合在一起。HBPUE3 / Al的最大拉伸强度高达1.15 MPa。