Robust polyurea/poly(urea–formaldehyde) hybrid microcapsules decorated with Al2O3 nano-shell for improved self-healing performance

Wu, Fengshun; Li, Junfeng; Quan, Heng; Han, Jun; Liu, Xiaoxuan; Zhang, Xiaokun; Yang, Jinglei; Xiang, Yong

doi:10.1016/j.apsusc.2020.148561

Cited by 29 publications

(13 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the preparation of LM microcapsule additives, a simple in situ polymerization of the urea-formaldehyde (PUF) layer onto the surface of liquid metal colloids was used. Namely, a stable oil-in-water emulsion containing liquid metal dispersed in a mixed aqueous solution is first emulsified under sonication and subsequently transformed into a poly(urea-formaldehyde) (PUF) layer deposited onto the surface of the emulsion (LM microcapsule) via the condensation reaction of the methylol and amino groups under alkaline conditions and a high temperature. − The obtained LM microcapsule shows an elliptical morphology with a broad size distribution from 5.16 to 23.22 μm (Figure d), which may be related to its large density when compared with the emulsion of the aqueous solution, making it difficult to disperse uniformly and steadily. Moreover, the formed LM microcapsule shows a dense solid shell with many grooves and significant peaks of Ga, In, and Sn, indicating the successful encapsulation of the liquid metal into the microcapsule (Figure e,f).…”

Section: Resultsmentioning

confidence: 99%

Self-Healing Silicon Anode via the Addition of GaInSn-Encapsulated Microcapsules

Yang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Silicon materials as promising anodes for lithium-ion batteries own a high specific capacity and a low discharge potential, while their application is restricted by their huge volumetric expansion and poor conductivity. In this study, a self-healing GaInSn–MS/Si hybrid electrode using an additive of microencapsulated gallium- liquid metal (GaInSn) with high electrical conductivity and mobility (LM microcapsule) was fabricated via an aqueous casting process. With the added LM microcapsule in the GaInSn–MS/Si hybrid electrode, the dispersed GaInSn could not only avoid its oxidation into a solid-state gallium oxide with decreased conductivity but also make it easy for uniform dispersion and quick fluidity. Consequently, the constructed self-healing GaInSn–MS/Si anode does not require manual splicing when the anode forms cracks, realizing a spontaneous self-healing performance, and the GaInSn–MS/Si hybrid electrode displays superior cycle stability and structural integrity, which retains a capacity of 806.7 mAh g–1 after 100 cycles at 2.1 A g–1. The constructed self-healing Si electrode structure design via LM microcapsule additives would provide a simple synthesis strategy for manufacturing advanced Si electrodes.

show abstract

Section: Resultsmentioning

confidence: 99%

Self-Healing Silicon Anode via the Addition of GaInSn-Encapsulated Microcapsules

Yang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…The former two methods were usually employed to prepare microcapsules with polymeric shells. In situ polymerization in oil/water emulsion was employed to produce microcapsules with shells such as polyurea-formaldehyde [ 11 ], polyurethane [ 12 ], polyurea [ 13 ], and phenol formaldehyde [ 14 ]. The solvent evaporation phase separation method can be applied to encapsulate hexadecane by a wide range of polymeric shells including poly(1-lactide), poly(methyl methacrylate), poly(vinyl formal), poly(vinyl acetate), poly(2,6-dimethyl-1,4-phenylene oxide), poly(vinyl cinnamate) [ 8 ], and polystyrene [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Dual Functional Graphene Oxide Microcapsules Carrying Corrosion Inhibitor and Encapsulating Self-Healing Agent

Tao

Cui

et al. 2022

Polymers

View full text Add to dashboard Cite

Dual functional graphene oxide (GO) microcapsules were fabricated through self-assembly in Pickering emulsions, carrying corrosion inhibitor benzotriazole (BTA) on the microcapsule shells and encapsulating a self-healing agent epoxy monomer. The formation of the GO microcapsules was assisted by the interaction between BTA and GO, which provided robust encapsulation for the epoxy monomer. The loading capacity of BTA and epoxy monomer reached 90.5%. The addition of the GO microcapsules simultaneously promoted the corrosion protection and self-healing properties of the waterborne epoxy composite coatings. The healing efficiency of the composite coatings reached over 99.7% when the content of the microcapsules was 10 wt%. Meanwhile, the corrosion current density of the intact coatings was decreased for around 50 times.

show abstract

“…Second, coatings in which external components, such as hollow fibers or microcapsules containing repair agents, are incorporated into the coating. Once the coating is damaged, these repair agents are released to fill and repair the cracks, initiating self-healing [ 11 , 12 , 13 ]. Tao et al developed a very efficient coating by adding silica nanoparticles (SNPs) and microcapsules to an aqueous epoxy resin.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Alumina-Doped Prunus domestica Gum Grafted Polyaniline Epoxy Resin for Corrosion Protection Coatings for Mild Steel and Stainless Steel

et al. 2022

View full text Add to dashboard Cite

Eco-friendly inhibitors have attracted considerable interest due to the increasing environmental issues caused by the extensive use of hazardous corrosion inhibitors. In this paper, environmentally friendly PDG-g-PANI/Al2O3 composites were prepared by a low-cost inverse emulsion polymerization for corrosion inhibition of mild steel (MS) and stainless steel (SS). The PDG-g-PANI/Al2O3 composites were characterized by different techniques such as X-ray diffraction (XRD), UV/Vis, and FTIR spectroscopy. XRD measurements show that the PDG-g-PANI/Al2O3 composite is mostly amorphous and scanning electron micrographs (SEM) reveal a uniform distribution of Al2O3 on the surface of the PDG-g-PANI matrix. The composite was applied as a corrosion inhibitor on mild steel (MS) and stainless steel (SS), and its efficiency was investigated by potentiodynamic polarization measurement in a 3.5% NaCl and 1 M H2SO4 solution. Corrosion kinetic parameters obtained from Tafel evaluation show that the PDG-g-PANI/Al2O3 composites protect the surface of MS and SS with inhibition efficiencies of 92.3% and 51.9% in 3.5% NaCl solution, which is notably higher than those obtained with untreated epoxy resin (89.3% and 99.5%). In particular, the mixture of epoxy/PDG-g-PANI/Al2O3 shows the best performance with an inhibition efficiency up to 99.9% on MS and SS. An equivalent good inhibition efficiency was obtained for the composite for 1M H2SO4. Analysis of activation energy, formation enthalpy, and entropy values suggest that the epoxy/PDG-g-PANI/Al2O3 coating is thermodynamically favorable for corrosion protection of MS and exhibits long-lasting stability.

show abstract

Robust polyurea/poly(urea–formaldehyde) hybrid microcapsules decorated with Al2O3 nano-shell for improved self-healing performance

Cited by 29 publications

References 32 publications

Self-Healing Silicon Anode via the Addition of GaInSn-Encapsulated Microcapsules

Self-Healing Silicon Anode via the Addition of GaInSn-Encapsulated Microcapsules

Facile Fabrication of Dual Functional Graphene Oxide Microcapsules Carrying Corrosion Inhibitor and Encapsulating Self-Healing Agent

Investigation of Alumina-Doped Prunus domestica Gum Grafted Polyaniline Epoxy Resin for Corrosion Protection Coatings for Mild Steel and Stainless Steel

Contact Info

Product

Resources

About