title: Sodium alginate-assisted exfoliation of MoS2and its reinforcement in polymer nanocomposites.
abstract: In this work, molybdenum disulfide (MoS2) nanosheets were facilely prepared by direct exfoliation of MoS2in aqueous media with the assistance of sodium alginate (SA). Transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectra results showed that the raw MoS2was successfully exfoliated into few-layer MoS2nanosheets (SA-MoS2). FTIR and thermal gravimetric analysis (TGA) investigations showed that the obtained MoS2nanosheets were modified by SA after exfoliation and improved dispersion in water were achieved. The obtained SA-MoS2nanosheets were employed to reinforce the water-soluble polymer SA. No obvious macroscopic phase separation could be found from the SA/SA-MoS2films. Dynamic mechanical analysis (DMA) results showed that almost 9 times enhancement for the storage modulus of SA was achieved with the incorporation of only 0.5wt% of SA-MoS2, and the thermal stability of SA was also found improved with the addition of SA-MoS2according to the thermal gravimetric analysis TGA results.
authors.affiliation: College of Chemistry & Chemical Engineering, Anhui University, Anhui Province Key Laboratory of Environment-friendly Polymer Materials, Hefei 230601, China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Xuan
authors.affiliation: College of Chemistry & Chemical Engineering, Anhui University, Anhui Province Key Laboratory of Environment-friendly Polymer Materials, Hefei 230601, China. Electronic address: yifengzhou@126.com.
authors.forename: Yifeng
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: College of Chemistry & Chemical Engineering, Anhui University, Anhui Province Key Laboratory of Environment-friendly Polymer Materials, Hefei 230601, China.
authors.forename: Wangyan
authors.initials: W
authors.lastname: Nie
authors.affiliation: College of Chemistry & Chemical Engineering, Anhui University, Anhui Province Key Laboratory of Environment-friendly Polymer Materials, Hefei 230601, China. Electronic address: chenpp@ahu.edu.cn.
authors.forename: Pengpeng
authors.initials: P
authors.lastname: Chen
keywords: Molybdenum disulfide; Nanocomposites; Sodium alginate; Thermal and mechanical properties