Facile and cost-effective synthesis of isocyanate microcapsules via polyvinyl alcohol-mediated interfacial polymerization and their application in self-healing materials

Wang, Xinmeng; Jiang, Shuai; Li, Qifeng; Wang, Junwei; Zhao, Yang; Kang, Maoqing

doi:10.1016/j.compscitech.2016.11.004

Cited by 70 publications

(31 citation statements)

References 44 publications

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“…In Figure 4(c), the shell of composite capsule was formed in the PVA emulsion, which could be reasonably explained as follows: the outer wall was firstly formed by the intermolecular hydrogen and chemical bonds among –OH groups of PVA at the O/W interface. 28 Subsequently, the inner wall resulting from the reaction between PAPI and DETA was formed by the moving boundary mechanism. 36…”

Section: Resultsmentioning

confidence: 99%

“…Subsequently, the polyurea was gradually formed by the moving boundary mechanism. 28 Therefore, the shell of the composite capsules was a composite wall composed of the PVA and the polyurea.…”

Section: Resultsmentioning

confidence: 99%

“…This might be attributed to the rapid formation of PVA cross-linking network at the O/W interface, which effectively reduced the loss of core liquid. 28 In addition, the single-layered microcapsules had thin wall, large size, and poor mechanical properties, which was not beneficial to practical application (see Figure 7). Therefore, the capsules with composite shell were identified as the optimum for the preparation of self-healing materials in this work.…”

Section: Resultsmentioning

confidence: 99%

“…The core content of microcapsules was analyzed by 1 H NMR analysis (Bruker Avance 400 MHz) with maleic anhydride as a reference compound. 28…”

Section: Methodsmentioning

confidence: 99%

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Optimized synthesis of isocyanate microcapsules for self-healing application in epoxy composites

Sun

Wang

Dong

et al. 2020

High Performance Polymers

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Microcapsules containing isophorone diisocyanate were fabricated in oil-in-water emulsion. The emulsification effect of different emulsifiers during the capsule synthesis was systematically investigated by optical microscope. Three kinds of shell materials were discussed to obtain the high core content, smooth-surfaced, and robust capsule by scanning electronic microscope and Fourier transform infrared spectroscopy. Self-healing performance of corresponding self-healing epoxy composites was fully evaluated by accelerated corrosion test and mechanical test. The results demonstrated that high core content and smooth-surfaced capsules with dense composite shell could be synthesized in polyvinyl alcohol emulsion, and the core content of the optimized capsules was determined as 71.3–84.6 wt% at the capsule size from 35 µm to 154 µm. In addition, the optimized capsules had good processing properties and the corresponding self-healing epoxy composites exhibited excellent core release and self-healing performance.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The core content of microcapsules was analyzed by 1 H NMR analysis (Bruker Avance 400 MHz) with maleic anhydride as a reference compound. 28…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Optimized synthesis of isocyanate microcapsules for self-healing application in epoxy composites

Sun

Wang

Dong

et al. 2020

High Performance Polymers

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“…34 Compared with other polymerization methods as abovementioned, the interfacial polymerization method was simpler, more cost-effective, and more efficient. 35 Through interfacial polymerization, PVA microcapsules filled with the water extracts of GWM were manufactured, and the release control properties could have potential applications in wearable supports and tights. To achieve this goal, SEM, FTIR, TG, and UV-VIS techniques were used to determine optimal preparation conditions, particle sizes, swelling and release properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation and In-Vitro Release Performance of Geranium Wilfordii Maxim Filled Biodegradable Microcapsules

Li¹,

Wang²,

Liu³

2017

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Encapsulation of Geranium wilfordii Maxim (GWM) into polyvinyl alcohol (PVA) biodegradable microcapsules was performed using the interfacial polymerization method. The optimum synthesis conditions including the core/shell ratio and the emulsifier concentration were explored. The fabricated microcapsules were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The in-vitro release behaviour of the GWM microcapsules was studied by ultraviolet-visible spectroscopy (UV-VIS). The results show that when the core/shell ratio was 1:1 and the emulsifier concentration was 5%, the GWM microcapsules sizes have a normal distribution with a mean diameter of 23.94 μm. FTIR results show that the GWM was successfully encapsulated by the PVA polymer. TG results indicate that the GWM microcapsules are stable below 300 o C. Moreover, the release from the GWM microcapsules occurs according to a non-Fickian diffusion model.

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Self‐Healing Materials for Environmental Applications

2019

Artificially Intelligent Nanomaterials

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Facile and cost-effective synthesis of isocyanate microcapsules via polyvinyl alcohol-mediated interfacial polymerization and their application in self-healing materials

Cited by 70 publications

References 44 publications

Optimized synthesis of isocyanate microcapsules for self-healing application in epoxy composites

Optimized synthesis of isocyanate microcapsules for self-healing application in epoxy composites

Preparation and In-Vitro Release Performance of Geranium Wilfordii Maxim Filled Biodegradable Microcapsules

Self‐Healing Materials for Environmental Applications

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