The Preparation of Stable MoS<sub>2</sub> Dispersions by Using Well-Defined Polymers with Pendant Sulfide Moieties
The preparation of stable dispersions of MoS<sub>2</sub> by ultrasonic aqueous and/or organic media containing amphiphilic molecules is an attractive and widely applicable method to form MoS<sub>2</sub> fine particles while suppressing its aggregation. In this study, we devel...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
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| Series: | Chemistry |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2624-8549/7/3/84 |
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| Summary: | The preparation of stable dispersions of MoS<sub>2</sub> by ultrasonic aqueous and/or organic media containing amphiphilic molecules is an attractive and widely applicable method to form MoS<sub>2</sub> fine particles while suppressing its aggregation. In this study, we developed a series of polymers with pendant sulfide moieties as a new dispersant, under the hypothesis that it would interact with sulfur atoms on MoS<sub>2</sub> surfaces. First, we designed a sulfide group-substituted methacrylate derivative (<b>ESMA</b>) with the hypothesis that it would interact with the MoS<sub>2</sub> surface through sulfur-sulfur interactions. Then, we synthesized well-defined polymers with pendant sulfide groups by living radical polymerization (ATRP). Next, 0.5 wt% MoS<sub>2</sub> was added to a DMSO solution containing 1 wt% of the obtained polymer (poly<b>ESMA</b>), and the mixture was treated with a bath-type ultrasonicator for 3 h to obtain a MoS<sub>2</sub> dispersion. We found that stable dispersions of MoS<sub>2</sub> in a fine particle state, although not in the form of single-layer or few-layer nanosheets, could be readily formed in DMSO using poly<b>ESMA</b> as a polymeric dispersant. Furthermore, we synthesized polymeric dispersants with different molecular weights and investigated the relationship between the structure of the dispersant and the dispersion stability. |
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| ISSN: | 2624-8549 |