Enhanced thermal properties of poly(vinylidene fluoride) composites with ultrathin nanosheets of MXene

Cao, Yong; Deng, Qihuang; Liu, Zhiduo; Shen, Dianyu; Wang, Ting; Huang, Qing; Du, Shiyu; Jiang, Nan; Lin, Cheng‐Te; Yu, Jinhong

doi:10.1039/c7ra00184c

Cited by 254 publications

(165 citation statements)

References 60 publications

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“…High temperatures are required to dehydrate free‐standing MXene films due to the intercalation of water in small interlayer spacing of ≈10 Å. The decomposition of pristine Ti 3 C 2 T x starts ≈750 °C, resulting in CO release as shown by the m / z = 28 curve in the Figure 4B . Decomposition of Ti 3 C 2 T x also results in the evolution of CO 2 and HF gases along with the transformation of the scaffold into titanium carbide (TiC) .…”

Section: Resultsmentioning

confidence: 98%

Surface Modification of a MXene by an Aminosilane Coupling Agent

Riazi

Anayee

Hantanasirisakul

et al. 2020

Adv Materials Inter

144

113

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MXenes, two‐dimensional (2D) transition metal carbides and/or nitrides, possess surface termination groups such as hydroxyl, oxygen, and fluorine, which are available for surface functionalization. Their surface chemistry is critical in many applications. This article reports amine functionalization of Ti3C2Tx MXene surface with [3‐(2‐aminoethylamino)‐propyl]trimethoxysilane (AEAPTMS). Characterization techniques such as X‐ray photoelectron spectroscopy verify the success of the surface functionalization and confirm that the silane coupling agent bonds to Ti3C2Tx surface both physically and chemically. The functionalization changes the MXene surface charge from −35 to +25 mV at neutral pH, which allows for in situ preparation of self‐assembled films. Further, surface charge measurements of the functionalized MXene at different pH values show that the functionalized MXene has an isoelectric point at a pH around 10.7, and the highest reported positive surface charge of +62 mV at a pH of 2.58. Furthermore, the existence of a mixture of different orientations of AEAPTMS and the simultaneous presence of protonated and free amine groups on the surface of Ti3C2Tx are demonstrated. The availability of free amine groups on the surface potentially permits the fabrication of crosslinked electrically conductive MXene/epoxy composites, dye adsorbents, high‐performance membranes, and drug carriers. Surface modifications of this type are applicable to many other MXenes.

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Section: Resultsmentioning

confidence: 98%

Surface Modification of a MXene by an Aminosilane Coupling Agent

Riazi

Anayee

Hantanasirisakul

et al. 2020

Adv Materials Inter

144

113

View full text Add to dashboard Cite

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“…The crystallization of Ti 3 C 2 T x /PEO composite with a loading of 0.5 wt % Ti 3 C 2 T x is increased significantly attributed to the heterogeneous nucleation effect of Ti 3 C 2 T x . Recently, Cao et al . prepared the Ti 3 C 2 T x /poly(vinylidene fluoride) (PVDF) composites by solution blending.…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical properties of poly(lactic acid) composites with ultrathin nanosheets of MXene modified by stearic acid

Yang

Liu

et al. 2019

J of Applied Polymer Sci

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MXene modified by stearic acid (Ti 3 C 2 T x -g-SA) is incorporated into poly(lactic acid) (PLA) matrix to prepare Ti 3 C 2 T x -g-SA/PLA composites. The effects of Ti 3 C 2 T x -g-SA to pure PLA are investigated, including crystallization, mechanical, and thermal properties. Fourier transform infrared spectroscopy and X-ray diffraction analyses confirm that Ti 3 C 2 T x interlayer is successfully intercalated by SA, and the interlayer spacing of Ti 3 C 2 T x is increased. Differential scanning calorimetry illustrates that the cold crystallization enthalpy (ΔH cc ), melting enthalpy (ΔH m ), and crystallinity (X c ) of Ti 3 C 2 T x -g-SA/PLA composites are improved by the plasticization and heterogeneous nucleation effect of Ti 3 C 2 T x -g-SA. Specially, the Ti 3 C 2 T x -g-SA/PLA composites exhibit excellent mechanical properties at an appropriate content of the Ti 3 C 2 T x -g-SA. Compared with pure PLA, the elongation at break of the Ti 3 C 2 T x -g-SA/PLA composite is increased 5.9-fold (up to 131.6%) when only containing 0.5 wt % Ti 3 C 2 T x -g-SA. Besides, the Ti 3 C 2 T x -g-SA/PLA composites exhibit good thermal stability in the low loading (lower than 1 wt %) of Ti 3 C 2 T x -g-SA.

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“…The modes for Ti 3 C 2 T x MXene are located at 128, 219, 385, 618 and 711 cm À1 , comparable to previous reports. [55][56][57] The heterogeneity of the surface terminal groups affect the overall spectrum as a result of collaborative vibrations from surface and central Ti atoms, central C atoms, and the terminal groups -O, -OH and -F. The band at 128 cm À1 (E g ) is indicative of -F terminal groups from in-plane vibrations of surface Ti and C atoms. Out-of-plane stretching vibrations of surface Ti and C atoms give rise to the 219 cm À1 band as a result of -OH terminal groups.…”

Section: Resultsmentioning

confidence: 99%