研究目的
To explore the mechanical tuning of a supramolecular hydrogel scaffold by dispersing different molybdenum dichalcogenides (MoS2 and MoSe2) and to investigate their effects on the rheological properties and morphological patterns of the hydrogel.
研究成果
The study successfully demonstrated the mechanical tuning of a supramolecular hydrogel scaffold by dispersing different molybdenum dichalcogenides (MoS2 and MoSe2). MoS2 enhanced the mechanical efficiency of the hydrogel, while MoSe2 lowered it. The morphological patterns of the hydrogels were altered depending on the nature and doses of chalcogens, supporting the rheological findings. This work opens new avenues for the technological advancement of TMDs based gel systems.
研究不足
The study is limited to the mechanical tuning of supramolecular hydrogels by dispersing MoS2 and MoSe2, and the effects of other dichalcogenides or different conditions were not explored. The limiting concentrations of dispersed dichalcogenides for maintaining the soft gel structure were optimized, but the study does not address the scalability or practical applications of these hydrogels.
1：Experimental Design and Method Selection:
The study involved the synthesis of molybdenum dichalcogenides (MoS2 and MoSe2) dispersed supramolecular hydrogel scaffolds (MDHGels) by liquid exfoliation of TMDs in water medium and their integration into a supramolecular hydrogel.
2：Sample Selection and Data Sources:
The samples were prepared using pure MoS2, pure MoSe2, and a mixture of both with different doses integrated into a specific amount of supramolecular hydrogel.
3：List of Experimental Equipment and Materials:
Molybdenum(IV) sulfide (99%), Molybdenum(IV) selenide (
4：9% trace metals basis), nitric acid (70%, purified by re-distillation, ≥ 999% trace metals basis), and double distilled water were used. Experimental Procedures and Operational Workflow:
The single- and few-layered nanosheets of MoS2 and MoSe2 were prepared and added into the melted solution of the supramolecular hydrogel under hot water bath, sonicated, and then cooled to form stable hydrogels.
5：Data Analysis Methods:
Rheological features were scrutinized using a rheometer, microstructural analyses were examined under a scanning electron microscope (SEM), and solid-phase IR spectroscopy was performed.
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FESEM
SUPRA 55VP
Carl Zeiss
Used to obtain microstructural images of the hydrogels.
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SEM
EVO 18
ZEISS
Used for microstructural analyses, EDX studies, and elemental mapping.
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FTIR spectrometer
FTIR-8400S
Shimadzu
Used for solid-phase IR spectroscopy.
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Molybdenum(IV) sulfide
Sigma-Aldrich
Used as a reinforcing agent in the supramolecular hydrogel to enhance mechanical properties.
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Molybdenum(IV) selenide
Sigma-Aldrich
Used to lower the mechanical properties of the supramolecular hydrogel.
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Nitric acid
Sigma-Aldrich
Used in the preparation of the supramolecular hydrogel.
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Rheometer
TA Instrument
Used to measure the rheological properties of the hydrogels.
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