Sorption of rhenium on synthetic cyclohexylamine anion exchange resin <scp>LSC</scp>‐436

Poly‐p‐phenylene‐(1,3,4‐oxadiazole) (POD) fibers have attracted tremendous attention due to the excellent thermal stability, however, their poor ultraviolet (UV) resistance seriously restricted the application. Some efforts have been devoted to improving the UV stability of POD, while the methods are generally too complicated or costly. This work applied a simple but effective approach to obtain POD/PPTA composite fibers by blending poly‐p‐phenylene terephthamide (PPTA) with POD. The results showed that the obtained POD/PPTA composite fibers exhibited enhanced tensile strength and heat resistance compared to the pure POD fibers. The POD/10%PPTA composite fibers retained 68% strength and 43% elongation even after 24 h UV accelerated aging. The improvement of UV resistance was attributed to the photoinduced electron transfer reaction in POD/PPTA composite fibers, which has been demonstrated by both experimental and simulation studies.

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Poly‐p‐phenylene terephthamide modified poly(1,3,4‐oxadiazole) fibers with superior ultraviolet resistance

Feng

Zhu

Yang

et al. 2023

J of Applied Polymer Sci

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Thermo‐responsive ReO₄⁻ composite membranes with SiO₂ modified: Preparation, performances and application in secondary resources

Zhao

Zhang

et al. 2023

J of Applied Polymer Sci

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With the continuous depletion of global rhenium resources, the separation and purification of rhenium (Re) from secondary resources became very important. Herein, an imprinted composite membrane with “flexible chain” thermo‐responsive imprinted separation layer structure (Re‐TIICM) was prepared to achieve selective separation and recovery of Re from secondary resources with complex composition. Re‐TIICM's thermo‐responsive imprinted separation layer occurred sol/gel phase transition by adjusting the temperature, which effectively mitigated the trade‐off between selectivity and desorption. The structure and performance of Re‐TIICM under optimum process conditions were tested and evaluated. The results showed that Re‐TIICM exhibited a maximum adsorption capacity of 0.1036 mmol/g at 35°C, a separation degree of 4.37 (MnO4− as disturbing ions), and remained good adsorption capacity and selectivity after 9 adsorption/desorption cycles. When Re‐TIICM was applied in secondary resources, the purity of Re increased from 35.412% to 70.208% after one adsorption/desorption cycle, showing a great potential for industrial applications.

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A novel thermosensitive porous imprinted polymer for selectively separating ReO₄⁻ based on Pickering‐like emulsion polymerization

Bu,

Chen,

Lin

et al. 2024

J of Applied Polymer Sci

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In this study, we combined the imprinting technique, temperature‐sensitive polymer, and Pickering emulsion polymerization to prepare a temperature‐sensitive porous imprinted polymer. First, the temperature‐sensitive block polymer PDEA‐b‐P (DEA‐co‐AM) was prepared by reversible‐addition fragmentation chain transfer polymerization, and then a temperature‐sensitive porous ReO4− imprinted polymer (ReO4−‐TPIP) was prepared using the Pickering‐like polymerization technique, which was introduced to the preparation of the imprinted polymer. The structure and morphology of the polymer were characterized by FTIR, SEM‐EDS, and BET. The adsorption experiments showed that the maximum adsorption (Q), separation (R), and desorption (D) of ReO4−‐TPIP were 0.1568 mmol/g, 3.41, and 85.22%, respectively, and the adsorption equilibrium could be reached after 120 min, which decreased to 0.1212 mmol/g, 1.23, and 70.01% after repeated use for 11 times. These results indicate that ReO4−‐TPIP has good adsorption and reusability properties. The adsorption studies showed that ReO4−‐TPIP conformed to the zero‐level kinetic model in the pre‐adsorption stage, the quasi‐one‐level kinetic model in the late stage, and the isothermal adsorption process conformed more to the Langmuir model. In addition, in the secondary leach solution of high‐temperature alloys, the purity of rhenium in the solution increased from 35.4119% to 53.4812% after one adsorption/desorption cycle. The prepared ReO4−‐TPIP provides a new material and strategy for the selective separation and purification of rhenium in complex rhenium‐containing solutions for the industry.

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Sorption of rhenium on synthetic cyclohexylamine anion exchange resin LSC‐436

Cited by 9 publications

References 18 publications

Poly‐p‐phenylene terephthamide modified poly(1,3,4‐oxadiazole) fibers with superior ultraviolet resistance

Poly‐p‐phenylene terephthamide modified poly(1,3,4‐oxadiazole) fibers with superior ultraviolet resistance

Thermo‐responsive ReO₄⁻ composite membranes with SiO₂ modified: Preparation, performances and application in secondary resources

A novel thermosensitive porous imprinted polymer for selectively separating ReO₄⁻ based on Pickering‐like emulsion polymerization

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Sorption of rhenium on synthetic cyclohexylamine anion exchange resin LSC‐436

Cited by 9 publications

References 18 publications

Poly‐p‐phenylene terephthamide modified poly(1,3,4‐oxadiazole) fibers with superior ultraviolet resistance

Poly‐p‐phenylene terephthamide modified poly(1,3,4‐oxadiazole) fibers with superior ultraviolet resistance

Thermo‐responsive ReO4− composite membranes with SiO2 modified: Preparation, performances and application in secondary resources

A novel thermosensitive porous imprinted polymer for selectively separating ReO4− based on Pickering‐like emulsion polymerization

Contact Info

Product

Resources

About

Thermo‐responsive ReO₄⁻ composite membranes with SiO₂ modified: Preparation, performances and application in secondary resources

A novel thermosensitive porous imprinted polymer for selectively separating ReO₄⁻ based on Pickering‐like emulsion polymerization