Living radical polymerization of polyacrylamide with submicrometer size by dispersion polymerization

Wang, Guoxiang; Lu, Mang; Hou, Zhaohui; Liu, Lichao; Liang, Enxiang; H, Wu

doi:10.1515/epoly-2014-0200

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…Many experiments have been carried out in different studies on the interaction of different doping materials with PVP [ 33 , 34 , 35 , 36 ] and it has been observed that the polymer composites formed reach their most homogeneous state by adding PVP. This would be due to experimental evidence showing that the use of PVP can significantly speed up the exfoliation of TMDs in composite solutions.…”

Section: Resultsmentioning

confidence: 99%

2D Materials (WS2, MoS2, MoSe2) Enhanced Polyacrylamide Gels for Multifunctional Applications

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et al. 2022

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Multifunctional polymer composite gels have attracted attention because of their high thermal stability, conductivity, mechanical properties, and fast optical response. To enable the simultaneous incorporation of all these different functions into composite gels, the best doping material alternatives are two-dimensional (2D) materials, especially transition metal dichalcogenides (TMD), which have been used in so many applications recently, such as energy storage units, opto-electronic devices and catalysis. They have the capacity to regulate optical, electronic and mechanical properties of basic molecular hydrogels when incorporated into them. In this study, 2D materials (WS2, MoS2 and MoSe2)-doped polyacrylamide (PAAm) gels were prepared via the free radical crosslinking copolymerization technique at room temperature. The gelation process and amount of the gels were investigated depending on the optical properties and band gap energies. Band gap energies of composite gels containing different amounts of TMD were calculated and found to be in the range of 2.48–2.84 eV, which is the characteristic band gap energy range of promising semiconductors. Our results revealed that the microgel growth mechanism and gel point of PAAm composite incorporated with 2D materials can be significantly tailored by the amount of 2D materials. Furthermore, tunable band gap energies of these composite gels are crucial for many applications such as biosensors, cartilage repair, drug delivery, tissue regeneration, wound dressing. Therefore, our study will contribute to the understanding of the correlation between the optical and electronic properties of such composite gels and will help to increase the usage areas so as to obtain multifunctional composite gels.

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Section: Resultsmentioning

confidence: 99%

2D Materials (WS2, MoS2, MoSe2) Enhanced Polyacrylamide Gels for Multifunctional Applications

Uysal

Nayır

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et al. 2022

Gels

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Dispersion polymerization of acrylamide with living character and controlled morphologies initiated and mediated by cobalt porphyrin

et al. 2016

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Dispersion polymerization of acrylamide (AM) catalyzed by cobalt porphyrin [Cobalt tetramethoxyphenylporphyrin, (TMOP)Co(II)] with the feature of living radical polymerization (LRP) in alcohol/water or dimethylformamide (DMF)/water was described. Well-defined polyacrylamide (PAM) uniform spherical particles with predetermined molecular weight and narrow polydispersity (Mw/Mn = 1.09-1.35) were obtained under mild thermal conditions. Linear first-order kinetics with different feeding ratio of AM and cobalt porphyrin were obtained and the number-average molecular weight (Mn) increased linearly with monomer conversion. However, little research has been reported on the (TMOP)Co(II) mediating a living radical dispersion polymerization of acrylamide. The effects of feeding ratio of monomer and cobalt porphyrin, the solvent, the time of polymerization as well as monomer concentration on the morphology of the spherical particles were investigated. There were the increasing trends in the particle size with increasing the concentration of monomer, the time of polymerization and feeding ratio of AM and cobalt porphyrin. The effects of the volume ratio of alcohol or DMF and water were also studied.

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Living radical polymerization of polyacrylamide with submicrometer size by dispersion polymerization

Cited by 2 publications

References 18 publications

2D Materials (WS2, MoS2, MoSe2) Enhanced Polyacrylamide Gels for Multifunctional Applications

2D Materials (WS2, MoS2, MoSe2) Enhanced Polyacrylamide Gels for Multifunctional Applications

Dispersion polymerization of acrylamide with living character and controlled morphologies initiated and mediated by cobalt porphyrin

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