当前位置：
X-MOL 学术
›
Ind. Eng. Chem. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
High-Efficiency Poly(vinylidene fluoride)-Based Piezoelectric Energy Harvester Based on Crystalline Manipulation during Microinjection
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-09-15 , DOI: 10.1021/acs.iecr.1c02996 Qi Wu 1 , Jiajun Guo 1 , Min Nie 1 , Qi Wang 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-09-15 , DOI: 10.1021/acs.iecr.1c02996 Qi Wu 1 , Jiajun Guo 1 , Min Nie 1 , Qi Wang 1
Affiliation
|
Mass-cultivation of β-crystals in poly(vinylidene fluoride) (PVDF) determines their successful application as a flexible piezoelectric generator. Here, we report a crystalline manipulation strategy to initiate the TG-to-TT conformation and the formation of the oriented β-crystals via microinjection and clearly revealed the dependence of a crystalline structure on injection speed. Especially, a high injection speed amplified the flow contribution to lengthen and thicken the shish, providing more β-nucleation sites for the orientation growth of β-crystals. Further, by combining the stability effect of lightly cross-linked PVDF on an entangled structure network, the oriented β-crystals with a high relative content of 62.0% were generated via the simple continuous melt-processing, endowing the resulting piezoelectric energy harvester with excellent mechanical robustness and compatibility as well as superior piezoelectric property, as evidenced by a high output voltage of 265 V/cm3 and a piezoelectric sensitivity of 96 V/MPa. Finally, the successful application as a piezoelectric energy harvester was demonstrated by driving the normal operation of electronic watch and thermometer through arm bending and foot stepping, presenting promising potential in self-powering various portable electronic devices via electromechanical conversion from human activity. This work revealed the importance of crystalline control to optimize the piezoelectric properties of PVDF, providing a good fabrication strategy of flow design and material selection for excellent piezoelectric PVDF devices.
中文翻译：
基于显微注射晶体操作的高效聚偏二氟乙烯压电能量收集器
聚偏二氟乙烯 (PVDF) 中 β 晶体的大量培养决定了它们作为柔性压电发电机的成功应用。在这里，我们报告了一种晶体操作策略，通过显微注射启动 TG 到 TT 构象和定向 β 晶体的形成，并清楚地揭示了晶体结构对注射速度的依赖性。特别是，高注射速度放大了流动对延长和加厚shish的贡献，为β-晶体的取向生长提供了更多的β-成核位点。此外，通过结合轻度交联的 PVDF 对纠缠结构网络的稳定性影响，通过简单的连续熔融加工生成了相对含量高达 62.0% 的定向 β 晶体，3和 96 V/MPa 的压电灵敏度。最后，通过弯曲手臂和踏脚来驱动电子手表和温度计的正常运行，证明了作为压电能量收集器的成功应用，在通过人类活动的机电转换为各种便携式电子设备自供电方面具有广阔的潜力。这项工作揭示了结晶控制对优化 PVDF 压电性能的重要性，为优秀的压电 PVDF 器件提供了良好的流程设计和材料选择制造策略。
更新日期：2021-09-29
中文翻译：
基于显微注射晶体操作的高效聚偏二氟乙烯压电能量收集器
聚偏二氟乙烯 (PVDF) 中 β 晶体的大量培养决定了它们作为柔性压电发电机的成功应用。在这里，我们报告了一种晶体操作策略，通过显微注射启动 TG 到 TT 构象和定向 β 晶体的形成，并清楚地揭示了晶体结构对注射速度的依赖性。特别是，高注射速度放大了流动对延长和加厚shish的贡献，为β-晶体的取向生长提供了更多的β-成核位点。此外，通过结合轻度交联的 PVDF 对纠缠结构网络的稳定性影响，通过简单的连续熔融加工生成了相对含量高达 62.0% 的定向 β 晶体，3和 96 V/MPa 的压电灵敏度。最后，通过弯曲手臂和踏脚来驱动电子手表和温度计的正常运行，证明了作为压电能量收集器的成功应用，在通过人类活动的机电转换为各种便携式电子设备自供电方面具有广阔的潜力。这项工作揭示了结晶控制对优化 PVDF 压电性能的重要性，为优秀的压电 PVDF 器件提供了良好的流程设计和材料选择制造策略。
京公网安备 11010802027423号