Enhanced mechanical properties of epoxy composites embedded with MF/TiO2 hybrid shell microcapsules containing n-octadecane

Peng, Guangjian; Hu, Yahao; Dou, Guijing; Sun, Yiheng; Huan, Yong; Kang, Sung Hoon; Zhong-yu, Piao

doi:10.1016/j.jiec.2022.03.018

Cited by 43 publications

(13 citation statements)

References 42 publications

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“…The microcompression load at the rupture point is defined as rupture load. 27 All the curves coincide well with each other, indicating microcompression tests of individual microcapsules have good repeatability. Rupture loads derived from loaddisplacement curves were summarized in Figure 10a.…”

Section: Mechanical Performancesupporting

confidence: 57%

“…30 Bernd et al 31 found that the addition of TiO 2 nanoparticles into the epoxy resin can simultaneously improve flexural strength, flexural stiffness, and fracture toughness of the polymer. In our previous work, 27 it was found that microcapsule rupture occurs when the bonding strength is higher than the microcapsule strength. On the contrary, microcapsule debonding occurs if the interfacial bonding strength is lower than the microcapsule strength.…”

Section: Introductionmentioning

confidence: 96%

“…Numerous studies have reported the preparation of MF microcapsules by in situ polymerization, which fulfills the encapsulation of PCMs by deposition and polymerization of prepolymer on the surface of the oil droplets. 27,28 Titanium dioxide (TiO 2 ) nanoparticles possess the features of high hardness, high thermal conductivity, and ultraviolet protection, which make TiO 2 nanoparticles widely used in many fields. 29 Particularly, TiO 2 nanoparticles can be used as reinforcing fillers for organic polymers, and the presence of nanoparticles in matrix induces various strengthening mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the rupture strength of MF shell microcapsule by incorporating TiO₂ nanoparticles with an optimal content

Dou,

Lu,

et al. 2023

J of Applied Polymer Sci

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Microencapsulated phase change materials (MPCMs) are usually subjected to internal pressure caused by core volume changes or external mechanical stress during service. It is of great importance for individual microcapsule to achieve good mechanical performance to be effective in avoiding the leakage of core material and providing crucial protection to environment. Here, n‐octadecane was selected as core material and different amounts of titanium dioxide (TiO2) nanoparticles were added into the melamine formaldehyde (MF) shell, forming n‐octadecane@MF‐TiO2 hybrid shell MPCMs by in situ polymerization. It has been confirmed that TiO2 nanoparticles had been well embedded in the network structure of MF shell. The doping of TiO2 is beneficial to the inhibition of supercooling and the improvement of the thermal stability for hybrid shell microcapsules. Microcompression tests were conducted to determine the rupture loads of prepared microcapsules. TiO2 nanoreinforcements increase the rupture loads of MF‐TiO2 shell microcapsules and the improvement percentage in rupture load reaches a maximum of 138.14% at TiO2 content of 2 wt.% compared with pristine microcapsules. Crack deflection and pinning may account for the potential strengthening mechanism of the MF nanocomposites. The reinforced MPCMs will contribute to their more promising and widespread applications in thermal energy storage systems.

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Section: Mechanical Performancesupporting

confidence: 57%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Improvement of the rupture strength of MF shell microcapsule by incorporating TiO₂ nanoparticles with an optimal content

Dou,

Lu,

et al. 2023

J of Applied Polymer Sci

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“…15 However, phase change capsules with organic shells suffer from low thermal conductivity. Decoration with inorganic nanomaterials could make an improvement in the thermal conductivity of the phase change capsules, 16,17 while these decorations inevitably result in the complexity of preparation processes. Comparatively, phase change capsules with inorganic shells, such as paraffin@SiO 2 microcapsules, 18,19 have higher thermal conductivity and thus are more suitable for developing the composites for use in the fields of thermal management and heat dissipation.…”

Section: Introductionmentioning

confidence: 99%

Incorporating paraffin@SiO₂ nanocapsules with abundant surface hydroxyl groups into polydimethylsiloxane to develop composites with enhanced interfacial heat conductance for chip heat dissipation

Lin

Zhou

et al. 2023

Nanoscale

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“…Therefore, numerous heat storage materials, such as phase change materials (PCMs), have been widely used due to their high energy storage density and good thermal and chemical stability, which can obviously reduce energy consumption due to the phase change process by maintaining small fluctuations between indoor and outdoor temperatures [ 5 , 6 ]. For example, n -octadecane has been regarded as one of the best phase change energy storage materials due to its high heat storage capacity of 237.50 J/g with a phase transition temperature of 29.0 °C as well as stable chemical and noncorrosive properties [ 7 , 8 ]. However, special encapsulation technology for PCMs requires the prevention of flowability and leakage problems of n -octadecane during the phase change procedure.…”

Section: Introductionmentioning

confidence: 99%

Cadmium Sulfide—Reinforced Double-Shell Microencapsulated Phase Change Materials for Advanced Thermal Energy Storage

et al. 2022

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Phase change materials (PCMs) are widely used to improve energy utilization efficiency due to their high energy storage capacity. In this study, double-shell microencapsulated PCMs were constructed to resolve the liquid leakage issue and low thermal conductivity of organic PCMs, which also possess high thermal stability and multifunctionality. We used assembly to construct an inorganic–organic double shell for microencapsulate PCMs, which possessed the unprecedented synergetic properties of a cadmium sulfide (CdS) shell and melamine–formaldehyde polymeric shell. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images confirmed the well-designed double-shell structure of the microcapsules, and the CdS was successfully assembled as the second shell on the surface of the polymer shell. The differential scanning calorimeter (DSC) showed that the double-shell microcapsules had a high enthalpy of 114.58 J/g, which indicated almost no changes after experiencing 100 thermal cycles, indicating good thermal reliability. The microcapsules also showed good shape stability and antileakage performance, which displayed no shape change and leakage after heating at 60 °C for 30 min. In addition, the photothermal conversion efficiency of the double-shell microcapsules reached 91.3%. Thus, this study may promote the development of microencapsulated PCMs with multifunctionality, offering considerable application prospects in intelligent temperature management for smart textiles and wearable electronic devices in combination with their solar thermal energy conversion and storage performance.

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Enhanced mechanical properties of epoxy composites embedded with MF/TiO2 hybrid shell microcapsules containing n-octadecane

Cited by 43 publications

References 42 publications

Improvement of the rupture strength of MF shell microcapsule by incorporating TiO₂ nanoparticles with an optimal content

Improvement of the rupture strength of MF shell microcapsule by incorporating TiO₂ nanoparticles with an optimal content

Incorporating paraffin@SiO₂ nanocapsules with abundant surface hydroxyl groups into polydimethylsiloxane to develop composites with enhanced interfacial heat conductance for chip heat dissipation

Cadmium Sulfide—Reinforced Double-Shell Microencapsulated Phase Change Materials for Advanced Thermal Energy Storage

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Enhanced mechanical properties of epoxy composites embedded with MF/TiO2 hybrid shell microcapsules containing n-octadecane

Cited by 43 publications

References 42 publications

Improvement of the rupture strength of MF shell microcapsule by incorporating TiO2 nanoparticles with an optimal content

Improvement of the rupture strength of MF shell microcapsule by incorporating TiO2 nanoparticles with an optimal content

Incorporating paraffin@SiO2 nanocapsules with abundant surface hydroxyl groups into polydimethylsiloxane to develop composites with enhanced interfacial heat conductance for chip heat dissipation

Cadmium Sulfide—Reinforced Double-Shell Microencapsulated Phase Change Materials for Advanced Thermal Energy Storage

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Product

Resources

About

Improvement of the rupture strength of MF shell microcapsule by incorporating TiO₂ nanoparticles with an optimal content

Improvement of the rupture strength of MF shell microcapsule by incorporating TiO₂ nanoparticles with an optimal content

Incorporating paraffin@SiO₂ nanocapsules with abundant surface hydroxyl groups into polydimethylsiloxane to develop composites with enhanced interfacial heat conductance for chip heat dissipation