Preparation and characterization of a polyvinyl alcohol grafted bis-crown ether anion exchange membrane with high conductivity and strong alkali stability

Shang, Chenshi; Wang, Ze; Wang, Lulu; Wang, Jilin

doi:10.1016/j.ijhydene.2020.04.134

Cited by 18 publications

(7 citation statements)

References 38 publications

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“…Advances in Materials Science and Engineering spike [26]. e calculation formula of corn yield is shown as follows:…”

Section: Measurement Of Crop Performance Indicatorsmentioning

confidence: 99%

Synthesis and Properties of Supramolecular Crops Based on PNZST Antiferroelectric Film

Zhou

2022

Advances in Materials Science and Engineering

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With the rapid development of ecological agriculture and the continuous changes of the ecological environment, crops are facing tremendous challenges. At the same time, people’s demand for the number and variety of crops is gradually increasing, so the synthesis and performance improvement of crops is imminent. The emergence of supramolecular crops has brought about huge changes in the yield of crops. In this paper, for the purpose of reducing the cost of crops and enhancing the ability of crops to adapt to the environment, PNZST antiferroelectric film materials are used to study the synthesis of supramolecular crops. Among them, rice, corn, and soybeans are used as reference objects for synthetic crops. Experiments were carried out in four aspects: growth rate, growth cycle, and yield. The growth status of the three crops in the past four years was monitored and recorded and analyzed. The survival rate of traditional rice was 86.3%–89.5%, the growth cycle was 86–90 days, and the yield was 69–77 kg/ha; the survival rate of traditional corn was 85.6%–89%, the growth cycle was 105–114 days, and the yield was 38–43 kg/ha; the survival rate of traditional soybean was 85.6%–89%, the growth cycle was 85–90 days, and the output was 14–16 kg/ha. The survival rate of synthetic rice was 95.5%–96.9%, the growth cycle was 63–66 days, and the yield was 83–86 kg/ha; the survival rate of synthetic corn was 97.3%–98.7%, the growth cycle was 85–95 days, and the yield was 53–56 kg/ha; the survival rate of synthetic soybeans was 96.3%–98.3%, the growth cycle was 59–68 days, and the yield was 29–33 kg/ha.

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“…Advances in Materials Science and Engineering spike [26]. e calculation formula of corn yield is shown as follows:…”

Section: Measurement Of Crop Performance Indicatorsmentioning

confidence: 99%

Synthesis and Properties of Supramolecular Crops Based on PNZST Antiferroelectric Film

Zhou

2022

Advances in Materials Science and Engineering

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“…If the conductivities were tested in bulk DI water, [13c–e] the leached ions would make water conductive, thus making concurrent movement of ions inside and outside of the membranes. If the through‐plane conductivities were tested in KOH solution, [13a, b] the collected currents would be contributed by the bidirectional transportation of both K + cations and OH − anions in AAEMs. Inspired by Dekel and co‐workers, we decided to adopt the “true hydroxide conductivity” testing method under direct current (DC) and humidified conditions [25] .…”

Section: Resultsmentioning

confidence: 99%

Alkaline‐Stable Anion‐Exchange Membranes with Barium [2.2.2]Cryptate Cations: The Importance of High Binding Constants

Zhang

Wang

et al. 2023

Angewandte Chemie

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The stability of cationic functional groups is one of the key factors determining lifetime of alkaline anion‐exchange membranes (AAEMs) and the AAEM‐based electrochemical devices. Main‐group metal and crown ether complexes are stable cations due to the absence of degradation pathways including nucleophilic substitution, Hofmann elimination, and cation redox. However, the binding strength, a key feature for AAEM applications, is overlooked in previous work. We herein propose the use of barium [2.2.2]cryptate ([Cryp‐Ba]2+) as a new cationic functional group for AAEMs due to its extremely strong binding (109.5 M−1 in water at 25 °C). The [Cryp‐Ba]2+‐AAEMs with polyolefin backbones remain stable after treatment in 15 M KOH at 60 °C for over 1500 hours. More importantly, these AAEMs are successfully applied in water electrolyzers, and an anolyte‐feeding switch method is designed to further reveal the influence of binding constants.

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“…The method is as reported in the published work. The IEC value (mmol·g –1 ) is calculated by Formula − where C NaOH and V NaOH are the concentration (mol·L –1 ) and volume (L) of NaOH solution, respectively; m dry is the weight of the dried membrane.…”

Section: Methodsmentioning

confidence: 99%

Organic Solvent-Resistant and Robust Kevlar Nanofiber-Based Cation-Exchange Membranes for Improved Electrodialysis Performance

Dong

et al. 2022

ACS Appl. Polym. Mater.

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With the increasingly serious pollution of organic solvents, the development of durable resistance of organic solvents and robust ion-exchange membranes is of great significance for specific electrodialysis processes. In this work, a series of resistant organic solvent cation-exchange membranes (CEMs) have been prepared by using small and short Kevlar nanofibers modified with the poly(4-styrene sulfonic acid-co-maleic acid) sodium salt and polyethyleneimine via amide condensation. The investigation demonstrates that the as-prepared Kevlar nanofiber-based CEM (PP-K-5.0 CEM) exhibits a high tensile strength of 142.23 MPa and good electrochemical performance. To evaluate the stability of the desalination performance of the prepared CEM in the organic solvent, the CEM was immersed in acetone and ethanol aqueous solutions at room temperature for 7 d. As for the evaluation of CEM performance, electrodialysis with treated CEM (PP-K-5.0 CEM) can achieve high desalination efficiencies (84.5% in 90% ethanol solution and 85.4% in 90% acetone solution) and concentration efficiencies (90.7% in 90% ethanol solution and 87.5% in 90% acetone solution), respectively. The results indicate that this work could provide a design route for preparing robust CEMs, which is potentially applied in desalination systems containing organic solvents.

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Preparation and characterization of a polyvinyl alcohol grafted bis-crown ether anion exchange membrane with high conductivity and strong alkali stability

Cited by 18 publications

References 38 publications

Synthesis and Properties of Supramolecular Crops Based on PNZST Antiferroelectric Film

Synthesis and Properties of Supramolecular Crops Based on PNZST Antiferroelectric Film

Alkaline‐Stable Anion‐Exchange Membranes with Barium [2.2.2]Cryptate Cations: The Importance of High Binding Constants

Organic Solvent-Resistant and Robust Kevlar Nanofiber-Based Cation-Exchange Membranes for Improved Electrodialysis Performance

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