High thermal storage ability and photothermal conversion capacity phase change capsule with graphene oxide covalently grafted silica shell

Zhang, Zetian; Liu, Yang; Liang, Ze; Li, Fufen; Yong, Yong; Li, Zhengjun

doi:10.1016/j.colsurfa.2022.130594

Cited by 10 publications

(2 citation statements)

References 49 publications

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“…Graphene oxide (GO) has attracted much attention due to its high radius–thickness ratio, shielding property, high strength, and photothermal conversion properties, and researchers have already integrated GO into the shell to boost the microcapsule performance. − The introduction of GO in the shell could not only enhance the barrier property, solvent resistance property, and mechanical property of microcapsules but also endow the microcapsule with photothermal conversion performance , and thermal conductivity, which broadens the application fields of microcapsules. At present, GO microcapsules are mainly prepared by the Pickering emulsion method via thermal polymerization, , which requires long reaction time and high temperature.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Graphene Oxide/Polymer Hybrid Microcapsules via Photopolymerization for Double Self-Healing Anticorrosion Coatings

Wu,

Chen,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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In this work, graphene oxide (GO)/polymer hybrid microcapsule-loaded self-healing agents were prepared via the combination of the emulsion template method and photopolymerization technology. The incorporation of GO in the microcapsule shell not only improved the impermeability, mechanical property, and solvent resistance property of the microcapsules significantly but also endowed the microcapsules with photothermal conversion property. By incorporating GO/ polymer hybrid microcapsules in water-borne epoxy resin, a novel kind of anticorrosion coating with a double self-healing property was successfully fabricated. When the coating was scratched, the linseed oil (LO) encapsulated in the microcapsules could fill the crack, and the photothermal conversion property of GO could promote the molecular chain movement of the damaged area under near-infrared (NIR) irradiation to realize the close of the crack. Based on the filling of LO and photothermal conversion-induced scratch narrowing, the "filling" and "close" double self-healing effect can be realized under temporal NIR irradiation, which could lead to the complete recovery of the scratched coating. The |Z| f=0.1Hz value of the damaged coating with GO/polymer microcapsules after double healing was comparable to that of the intact coating, which was about 4 orders of magnitude higher than that of the scratched blank coating and single self-healing coating. As to the neutral salt spray test, the scratched blank coating failed in protection after 100 h, while the healed composite coating did not show any corrosion after 300 h.

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Section: Introductionmentioning

confidence: 99%

Preparation of Graphene Oxide/Polymer Hybrid Microcapsules via Photopolymerization for Double Self-Healing Anticorrosion Coatings

Wu,

Chen,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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“…However, the microcapsules of the SiO 2 shell are usually white powders with low absorption intensity for visible and ultraviolet light, resulting in low utilization of solar radiation. There is no doubt that the development of solar photothermal materials or efficient solar photothermal conversion systems is a promising strategy for the efficient utilization of solar photothermal. − Zhang et al achieved a photothermal conversion efficiency of 64.4% by loading graphene oxide onto the surface of paraffin/silica-based microcapsules. However, most of the current functional particles (e.g., graphene oxide, carbon nanotubes) have low loading on the surface of phase change microcapsules and are prone to detachment.…”

Section: Introductionmentioning

confidence: 99%

Paraffin@silica@poly(dopamine)/Silver Phase Change Microcapsules with Efficient Photothermal Conversion Performance

Zhang,

Yang,

Jiang

et al. 2023

Energy Fuels

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In order to improve the photothermal conversion ability of phase change materials, Ag and polydopamine (PDA) were loaded onto the surface of paraffin@silicon dioxide (Pn@ SiO 2 ) microcapsules. The system starts with the encapsulation of paraffin into the silica shell using sodium silicate as the silica precursor. Then PDA is deposited on the silica shell, and the reduced Ag nanoparticles are uniformly immobilized on the microcapsule surface by the reducing property of PDA. The obtained Pn@SiO 2 @PDA/Ag microcapsules showed a regular spherical morphology as well as the desired chemical composition. The antileakage property of the microcapsules was significantly improved by coating the surface of the microcapsules with PDA, and the leakage rate was reduced from 4.86 to 1.27%. With the increase of silver content on the surface of microcapsules, their thermal conductivity and photothermal conversion performance properties are substantially improved. The results showed that the silver-plated microcapsules prepared with potassium sodium tartrate as the reducing agent not only had excellent antimicrobial properties but also had a high photothermal conversion efficiency of 88.7%. The work provides a promising approach for the development of functional materials based on phase change materials by loading Ag and PDA on phase change microcapsule systems, with potential applications in solar energy products, smart fabrics, and biomedical therapeutics.

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Construction of Multifunctional Composites for Electromagnetic Shielding and Infrared Stealth Based on Magnetic Phase Change Capsules and Silicone Rubber Foam

Zhang

Liu

Yang

et al. 2023

Adv Materials Technologies

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Functionalization of phase change capsules is recognized as one of the promising technologies to improve energy efficiency and promote their versatile application. Herein, a new magnetic phase change capsule (NiFe 2 O 4 -encapsulated phase change material (EPCM)) composed of paraffin wax core and SiO 2 -NiFe 2 O 4 double-layer shell is designed. The prepared NiFe 2 O 4 -EPCMs possess sensitive magnetic response, excellent thermal management performance, and enhanced thermal stability. In particular, the representative NiFe 2 O 4 -EPCM-4 has the highest saturation magnetization (8.41 emu • g −1 ) and high enthalpy of 131.2 J • g −1 . Subsequently, NiFe 2 O 4 -EPCM-4 is introduced into silicone rubber foam (SRF) matrix and magnetic composite SRFs (MSRFs) are prepared. The latent heat of MSRF-3 containing 30% NiFe 2 O 4 -EPCM-4 can reach 28.9 J g −1 and there is almost no change even after 200 cycles. In comparison with pure SRF, the tensile strength and compressive strength of MSRF-3 are increased by 167.7% and 941.8%, respectively. Importantly, the electromagnetic interference shielding effectiveness of MSRF-3 is significantly improved from 15.9 to 30.6 dB. Besides, the MSR-3 can achieve an intriguing infrared stealth function for targets both in human body temperature and high temperature environment. Therefore, this work might stimulate people's interest and inspiration in the design and preparation of multifunctional phase change capsules.

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High thermal storage ability and photothermal conversion capacity phase change capsule with graphene oxide covalently grafted silica shell

Cited by 10 publications

References 49 publications

Preparation of Graphene Oxide/Polymer Hybrid Microcapsules via Photopolymerization for Double Self-Healing Anticorrosion Coatings

Preparation of Graphene Oxide/Polymer Hybrid Microcapsules via Photopolymerization for Double Self-Healing Anticorrosion Coatings

Paraffin@silica@poly(dopamine)/Silver Phase Change Microcapsules with Efficient Photothermal Conversion Performance

Construction of Multifunctional Composites for Electromagnetic Shielding and Infrared Stealth Based on Magnetic Phase Change Capsules and Silicone Rubber Foam

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