Generation of a carbon dots/ammonium persulfate redox initiator couple for free radical frontal polymerization

Du, Xiang‐Yun; Shen, Juncai; Zhang, Jing; Ling, Luting; Wang, Cai‐Feng; Chen, Su

doi:10.1039/c7py01969f

“…Other reports unravel the use of CDs as co-initiators and catalysts. Some examples include free radical frontal polymerization, controlled light-mediated radical polymerization, and co-catalyzed polymerization [20][21][22][23]. Polymers with amino functional groups, such as polyaniline, polypyrrole, and poly (4,4 -diaminodiphenyl methane), were synthesized by CDs under UV light as an initiator [24,25].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity against Methicillin-Resistant Staphylococcus aureus of Colloidal Polydopamine Prepared by Carbon Dot Stimulated Polymerization of Dopamine

Maruthapandi

¹

,

Natan

²

,

Jacobi

³

et al. 2019

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A simple one-step process for the polymerization of dopamine has been developed using nitrogen-doped carbon dots (N@C–dots) as the sole initiator. The synthesized amorphous polydopamine (PDA)-doped N@C–dots (PDA–N@C–dots composite) exhibited a negative charge of –39 mV with particle sizes ranging from 200 to 1700 nm. The stable colloidal solution was active against methicillin-resistant Staphylococcus aureus (MRSA), a Gram-negative bacterium. The strong adhesion of the polymer to the bacterial membrane resulted in a limited diffusion of nutrients and wastes in and out of the cell cytosol, which is a generic mechanism to trigger cell death. Another possible route is the autoxidation of the catechol moiety of PDA to form quinone and release reactive oxygen species (ROS) such as superoxide radicle and hydrogen peroxide, two well-known ROS with antimicrobial properties against both Gram-negative and Gram-positive bacteria.

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“…Our group proposed a high‐efficiency ammonium persulfate (APS)/CD redox initiator couple for the frontal polymerization of vinyl monomers to rapidly prepare fluorescent hydrogels (Figure 3 A). Particularly, the existence of CDs enabled the polymerization to operate at a lower temperature [82] …”

Section: Methods For Fabricating Cd/polymer Compositesmentioning

confidence: 99%

The Rapid and Large‐Scale Production of Carbon Quantum Dots and their Integration with Polymers

Du

¹

,

Wang

²

,

Wu

³

et al. 2020

Self Cite

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Carbon quantum dots (CDs) have inspired vast interest because of their excellent photoluminescence (PL) performances and their promising applications in optoelectronic, biomedical, and sensing fields. The development of effective approaches for the large‐scale production of CDs may greatly promote the further advancement of their practical applications. In this Minireview, the newly emerging methods for the large‐scale production of CDs are summarized, such as microwave, ultrasonic, plasma, magnetic hyperthermia, and microfluidic techniques. The use of the available strategies for constructing CD/polymer composites with intriguing solid‐state PL is then described. Particularly, the multiple roles of CDs are emphasized, including as fillers, monomers, and initiators. Moreover, typical applications of CD/polymer composites in light‐emitting diodes, fluorescent printing, and biomedicine are outlined. Finally, we discuss current problems and speculate on their future development.

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“…Particularly,t he existence of CDs enabled the polymerization to operate at alower temperature. [82] As regards CDs as electron donors,J iang et al exploited P-and S-doped CDs as ac lass of novel and effective metalfree photocatalysts for the visible-light-regulated reversible addition-fragmentation chain-transfer (RAFT) polymerization of acrylate monomers.A ss hown in Figure 3B,C Ds are excited under irradiation with mild visible light to produce electron-hole pairs,a nd then generate the RAFT agents by reduction through charge-transfer reactions.T he reduced RAFT agents serve as both the initiators for creating radicals and the degenerative chain-transfer agents.T he generated radicals trigger the polymerization and reversibly mediate chain growth. Concurrently,they might be deactivated by the oxidized CDs to regenerate the ground-state CDs.F or example,t he resultant PMMA exhibited temporal control, low dispersity (1.04), high monomer conversion (86 %), and chain-end fidelity.…”

Section: The Use Of Cds As Initiatorsmentioning

confidence: 99%

Section: One-step Synthesis Of Cd/polymer Compositesmentioning

confidence: 99%

The Rapid and Large‐Scale Production of Carbon Quantum Dots and their Integration with Polymers

Du

¹

,

Wang

²

,

Wu

³

et al. 2020

Self Cite

View full text Add to dashboard Cite

Carbon quantum dots (CDs) have inspired vast interest because of their excellent photoluminescence (PL) performances and their promising applications in optoelectronic, biomedical, and sensing fields. The development of effective approaches for the large‐scale production of CDs may greatly promote the further advancement of their practical applications. In this Minireview, the newly emerging methods for the large‐scale production of CDs are summarized, such as microwave, ultrasonic, plasma, magnetic hyperthermia, and microfluidic techniques. The use of the available strategies for constructing CD/polymer composites with intriguing solid‐state PL is then described. Particularly, the multiple roles of CDs are emphasized, including as fillers, monomers, and initiators. Moreover, typical applications of CD/polymer composites in light‐emitting diodes, fluorescent printing, and biomedicine are outlined. Finally, we discuss current problems and speculate on their future development.

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Generation of a carbon dots/ammonium persulfate redox initiator couple for free radical frontal polymerization

Abstract: We report a new redox initiator couple of ammonium persulfate (APS)/carbon dots (CDs) with high initiation efficiency used in frontal polymerization (FP).

Cited by 22 publications

References 61 publications

Antibacterial Activity against Methicillin-Resistant Staphylococcus aureus of Colloidal Polydopamine Prepared by Carbon Dot Stimulated Polymerization of Dopamine

Antibacterial Activity against Methicillin-Resistant Staphylococcus aureus of Colloidal Polydopamine Prepared by Carbon Dot Stimulated Polymerization of Dopamine

The Rapid and Large‐Scale Production of Carbon Quantum Dots and their Integration with Polymers

The Rapid and Large‐Scale Production of Carbon Quantum Dots and their Integration with Polymers

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