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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
Electrical Power01:07

Electrical Power

Electric power is the product of current and voltage, represented in units of joules per second, or watts. For example, cars often have one or more auxiliary power outlets with which you can charge a cell phone or other electronic devices. These outlets may be rated at 20 amps and 12 volts, so that the circuit can deliver a maximum power of 240 watts. Consider a 25 Watt bulb and a 60 Watt bulb. The conversion of electrical energy produces heat and light, while the kinetic energy lost by the...
Electromotive Force01:02

Electromotive Force

Electromotive force (emf) is the force that causes current to flow from a higher to a lower  potential. The term "electromotive force" is used for historical reasons, even though emf is not a force at all.
Any circuit with a constant current must contain an emf-producing source. Examples of emf sources include batteries, electric generators, solar cells, thermocouples, and fuel cells. All these sources transform energy of some kind (mechanical, chemical, thermal, and so on) into electric...
DC Battery01:21

DC Battery

A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
Insulation Coordination01:23

Insulation Coordination

Insulation coordination is the process of matching electric equipment's insulation strength with protective device characteristics to protect the equipment against expected overvoltages. This selection is based on engineering judgment and cost. Equipment can generally withstand short-duration high transient overvoltages, but repeated tests with identical waveforms can yield inconsistent results. As a result, standard impulse voltage waveforms are used for testing, defined by specific times for...
Electro-mechanical Systems01:19

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...

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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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生物相容的压电弹性体用于自动供电电子产品.

Qiuyue Hu1,2, Yuting Zhang1, Xiaocui Rao1

  • 1Advanced Interdisciplinary Sciences Research (AIR) Center, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.

Nano letters
|June 5, 2025
PubMed
概括
此摘要是机器生成的。

研究人员使用安全的水基方法开发了一种新的生物相容的压电弹性体. 这种柔性材料为生物医学应用和可穿戴电源提供了出色的压电性能.

关键词:
压电弹性体 压电弹性体生物相容性的生物相容性弹性铁电制品 弹性铁电制品自动供电的设备自动供电的设备可穿戴电子产品的电子产品.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 生物医学工程 生物医学工程
  • 聚合物科学 聚合物科学

背景情况:

  • 压电弹性体是生物医学应用的理想选择,因为它们的灵活性和适应身体轮的能力.
  • 传统的压电陶是刚性和细胞毒性,而合成聚合物在制造过程中经常涉及危险的有机试剂,限制了它们的生物医学用途.
  • 需要弹性,生物相容的压电材料来确保生物安全.

研究的目的:

  • 设计和制造一种新的压电弹性体,可以平衡生物相容性,压电性和弹性.
  • 确保材料在直接组织接触和生物医学应用中是安全的.
  • 开发一种制造工艺,避免有害的有机试剂.

主要方法:

  • 通过将1,1,2,2,3,3,4,4-hexafluoropentanediol (HFPD) 与水性聚氨 (WPU) 基质结合,合成了一种生物相容的压电弹性体.
  • 制备过程中使用水作为溶剂,确保安全和环保的方法.
  • 评估了由此产生的弹性体的压电性能,生物相容性和机械性能.

主要成果:

  • 合成的弹性体显示出出色的生物相容性,适合组织接触.
  • 该材料表现出优越的压电性能,不需要传统的抛光工艺.
  • 即使在显著的拉力应变下 (高达200%) 也保持了高压电输出.

结论:

  • 已经建立了一个简单有效的策略,用于创建生物相容和弹性压电材料.
  • 开发的弹性体对推进生物医学材料,包括植入式设备和可穿戴电子产品,显示出重大前景.
  • 这项工作为医疗保健和能源采集中更安全,更有效的压电设备铺平了道路.