A water-triggered highly self-healable elastomer with enhanced mechanical properties achieved using localized zwitterionic assemblies

Kang, Jung-Ha; Kim, Jinsil; Choi, Kiwon; Hong, Pyong Hwa; Park, Hee Jeong; Kim, Kiseung; Kim, Young Kyung; Moon, Gyeongmin; Jeon, Hyeryeon; Lee, Seoyun; Ko, Min Jae; Hong, Sung Woo

doi:10.1016/j.cej.2020.127636

Cited by 23 publications

(20 citation statements)

References 65 publications

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“…It has been reported that self-healing materials usually have a trade-off relationship between self-healing ability and mechanical strength [ 19 , 20 , 23 ]. Figure 5 and Figure 6 illustrate the essential benefits of the self-healing PCMs developed in this study.…”

Section: Resultsmentioning

confidence: 99%

“…Intrinsic self-healing materials exploit reversible interactions between the components in the matrix for self-repair. Reversible interactions are classified as chemical (Diels–Alder reactions [ 10 , 11 , 12 ] and disulfide bonds [ 13 , 14 , 15 ]) or physical (host–guest interactions [ 16 , 17 ], hydrogen bonding interactions [ 18 , 19 , 20 ], ionic interactions [ 21 , 22 , 23 ], metal–ligand interactions [ 24 , 25 , 26 ], and π–π interactions [ 27 , 28 , 29 ]).…”

Section: Introductionmentioning

confidence: 99%

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Highly Self-Healable Polymeric Coating Materials with Enhanced Mechanical Properties Based on the Charge Transfer Complex

et al. 2022

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Polymeric coating materials (PCMs) are promising candidates for developing next-generation flexible displays. However, PCMs are frequently subjected to external stimuli, making them highly susceptible to repeated damage. Therefore, in this study, a highly self-healing PCM based on a charge transfer complex (CTC) was developed, and its thermal, self-healing, and mechanical properties were examined. The self-healing material demonstrated improved thermal stability, fast self-healing kinetics (1 min), and a high self-healing efficiency (98.1%) via CTC-induced multiple interactions between the polymeric chains. In addition, it eliminated the trade-off between the mechanical strength and self-healing capability that is experienced by typical self-healing materials. The developed PCM achieved excellent self-healing and superior bulk (in-plane) and surface (out-of-plane) mechanical strengths compared to those of conventional engineering plastics such as polyether ether ketone (PEEK), polysulfone (PSU), and polyethersulfone (PES). These remarkable properties are attributed to the unique intermolecular structure resulting from strong CTC interactions. A mechanism for the improved self-healing and mechanical properties was also proposed by comparing the CTC-based self-healing PCMs with a non-CTC-based PCM.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Self-Healable Polymeric Coating Materials with Enhanced Mechanical Properties Based on the Charge Transfer Complex

et al. 2022

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“…NGQDs as a hygroscopic moiety contain oxygen- and amine-rich functional groups, which are highly reactive with water molecules [see the X-ray photoelectron spectra (XPS) in Figure S3], so that the self-healing process stemming from the cross-linked NMA units will not be disrupted. Furthermore, water molecules increase the chain mobility in the nanocomposite system owing to the presence of hygroscopic NGQDs, which allows rapid restoration of the fractured nanocomposite. , Meanwhile, the hydrophobicity of BA units located on the outer surface of the copolymer retards the infiltration of water, as evidenced visually Figure g. The nanocomposite is still stretchable and has no observable swelling behavior.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Furthermore, water molecules increase the chain mobility in the nanocomposite system owing to the presence of hygroscopic NGQDs, which allows rapid restoration of the fractured nanocomposite. 35,36 Meanwhile, the hydrophobicity of BA units located on the outer surface of the copolymer retards the infiltration of water, as evidenced visually Figure 3g. The nanocomposite is still stretchable and has no observable swelling behavior.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Synergistic Effect in a Graphene Quantum Dot-Enabled Luminescent Skinlike Copolymer for Long-Term pH Detection

Laysandra

Kurniawan

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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The alluring properties of a luminescent graphene quantum dot (GQD)-based nanocomposite are unquestionable to realize many advanced applications, such as sweat pH sensors. The well-suited hydrophilic polymers to host GQDs can face an unavoidable swelling behavior, which deteriorates the mechanical stability, whereas the hydrophobic polymers can prevent swelling but at the same time barricade the analyte pathways to GQDs. To resolve the two aforementioned obstacles, we develop a nanocomposite film containing nitrogen-doped GQDs (NGQDs) incorporated into a transparent, elastic, and self-healable polymer matrix, composed of a hydrophobic n-butyl acrylate segment and a hydrophilic N-(hydroxymethyl)acrylamide segment for wearable healthcare pH sensors on the human body. Besides serving as the fluorescence source, NGQDs are also designed as a nano-cross-linker to promote abundant chemical and physical interactions within the nanocomposite network. This synergetic effect gives rise to a 10-fold higher mechanical strength, 7-fold increment in Young’s modulus, 4-fold increment in toughness, and 15-fold more sensitivity in pH detection (pH 3–10) compared to those of the pristine copolymer and NGQDs, respectively. Moreover, the mechanically enhanced nanocomposite possesses a high self-healing efficiency (94%) at room temperature even under water and demonstrates a stable sensing performance after repetitive usage for 30 days. Our work provides insights into the simple preparation of human skinlike nanocomposite elastomers usable for wearable pH sensors.

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“…175 In addition to hydrogels, the incorporation of sulfobetaine moieties into elastomeric materials also endowed them with self-healing properties upon contact with water. 176,177 178 Now the most commonly seen PCB constitutes a quaternary amine with the carboxyl group, mimicking the structure of glycine betaine, which is an osmoprotectant widely presented in biological systems. Different from phosphoryl and sulfo groups, the carboxyl group has a much higher pK a and its protonation can be modulated by the chemical environment.…”

Section: Poly(sulfobetaine)mentioning

confidence: 96%

Zwitterionic Biomaterials

et al. 2022

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The term “zwitterionic polymers” refers to polymers that bear a pair of oppositely charged groups in their repeating units. When these oppositely charged groups are equally distributed at the molecular level, the molecules exhibit an overall neutral charge with a strong hydration effect via ionic solvation. The strong hydration effect constitutes the foundation of a series of exceptional properties of zwitterionic materials, including resistance to protein adsorption, lubrication at interfaces, promotion of protein stabilities, antifreezing in solutions, etc. As a result, zwitterionic materials have drawn great attention in biomedical and engineering applications in recent years. In this review, we give a comprehensive and panoramic overview of zwitterionic materials, covering the fundamentals of hydration and nonfouling behaviors, different types of zwitterionic surfaces and polymers, and their biomedical applications.

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A water-triggered highly self-healable elastomer with enhanced mechanical properties achieved using localized zwitterionic assemblies

Cited by 23 publications

References 65 publications

Highly Self-Healable Polymeric Coating Materials with Enhanced Mechanical Properties Based on the Charge Transfer Complex

Highly Self-Healable Polymeric Coating Materials with Enhanced Mechanical Properties Based on the Charge Transfer Complex

Synergistic Effect in a Graphene Quantum Dot-Enabled Luminescent Skinlike Copolymer for Long-Term pH Detection

Zwitterionic Biomaterials

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