表面修改的孔填充的离子交换膜,通过反向电透析有效收集能量
Ji-Hyeon Lee1, Do-Hyeong Kim1, Moon-Sung Kang1
1Department of Green Chemical Engineering, College of Engineering, Sangmyung University, Cheonan 31066, Republic of Korea.
Membranes
|December 22, 2023
概括
经过多聚烯 (PPy) 和减少氧化石墨烯 (rGO) 修改的新型膜增强反向电透析 (RED) 能量收集. 这些PPy/rGO膜显示出更好的离子选择性和5.43%更高的功率密度.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 膜技术 膜技术 膜技术
背景情况:
- 反向电透析 (RED) 是盐度梯度能量收集的一个有前途的技术.
- 阳离子交换膜 (AEM) 是 RED 系统中的关键组件,但它们的性能通常受到离子选择性和污染的限制.
- 改善AEM属性对于提高RED效率至关重要.
研究的目的:
- 开发新型孔填充的离子交换膜 (PFAEMs) 经过多聚烯 (PPy) 和减少氧化石墨烯 (rGO) 的修饰.
- 通过改善膜特性来提高RED系统的能量采集性能.
- 研究PPy和rGO修改对膜特性和RED性能的影响.
主要方法:
- 通过螺旋涂层和化学/热处理,制造具有不同PPy和rGO含量的PFAEM.
- 膜表面性能的表征,包括结构紧密性,水友性和静电排斥.
- 在RED细胞中评估膜性能,重点关注离子选择性和功率密度.
主要成果:
- PPy和PPy/rGO层有效地控制了膜表面的特性,而不会显著增加电阻.
- 与商业AMX膜相比,PPy/rGO修饰的PFAEM具有四倍以上的单价离子选择性.
- 修改后的膜抑制了多价离子的上坡传输,减少了红细胞中的潜在差异减少.
- 在RED系统中使用PPy/rGO修改膜实现了功率密度增加5.43%.
结论:
- 用PPy和rGO对PFAEM表面进行修改是提高RED性能的有效策略.
- 增强的PPy/rGO修饰膜的离子选择性可以提高能量采集效率.
- 这些新的膜为实际的RED应用提供了有希望的进步.
相关概念视频
01:15Potentiometry: Membrane Electrodes
587
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
587
01:17Ion Exchange
593
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
593
01:15Dialysis
693
Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
693
01:18Detergent Purification of Membrane Proteins
5.2K
Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
5.2K
01:27ATP Driven Pumps I: An Overview
8.2K
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
8.2K