Morphology-controllable paraffin@lead tungstate microcapsules for gamma radiation shielding and thermal energy storage

Cai, Tianyu; Yang, Wenbin; Chen, Zhengguo; Yang, Aoshuang; Jiang, Jing; Ding, Bonan; Zhu, Liqin; He, Chuandong; Zhou, Yanyan; Zhang, Kai

doi:10.1016/j.est.2022.104245

Cited by 26 publications

(16 citation statements)

References 55 publications

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“…

{{T}_{m}}

and

{{T}_{c}}

represent the melting and crystallization temperatures of the samples, respectively. The latent heat storage/release rate (Rh) of the microcapsules was determined by DSC at different scanning speeds [26]

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {R}_{h}={{{\rm \Delta }{\rm H}}\over{{t}_{end}-{t}_{onset}}}\hfill\cr}}

…”

Section: Methodsmentioning

confidence: 99%

“…The latent heat storage/release rate (Rh) of the microcapsules was determined by DSC at different scanning speeds. [26] R h ¼ DH t end À t onset (3) Where ΔH is the melting or crystallization enthalpies, and t onset and t end are the onset and end time of phase transition, respectively.…”

Section: Characterizationmentioning

confidence: 99%

“…Compared with organic shells, inorganic shells generally have higher rigidity, greater mechanical strength, and better thermal conductivity. [25,26] In recent years, inorganic materials have been gradually used to prepare the shell materials of microcapsules, covering silica (SiO 2 ), [27] titanium dioxide (TiO 2 ), [28] calcium carbonate (CaCO 3 ), [28] zinc oxide (ZnO) [29] and so on. Among them, silica is widely used in the shell material of MEPCM, because of its high thermal conductivity, good physical and chemical stability, thermal stability and flame retardancy, non-toxic and environmentally friendly, and high mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

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Paraffin@Silica Microencapsulated Phase Change Materials with Improved Anti‐Leakage Properties

Zhang

Cai

et al. 2022

ChemistrySelect

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A series of paraffin (Pn)@silica (SiO 2 ) microencapsulated phase change materials (MEPCM) were synthesized by sol-gel process using tetraethyl orthosilicate (TEOS) and silane coupling agent as precursors. The morphology and chemical compositions of Pn@SiO 2 microcapsules were characterized by SEM and FT-IR, and thermal energy storage capacity was tested by DSC. The results showed that the Pn@SiO 2 microcapsules modified with 3-methacryloxypropyltrimethoxysilane (MPS) had a desirable phase transition enthalpy (184.12 J/g). Meanwhile, the contact angle and leakage rate of Pn@SiO 2 microcapsules were analyzed, and the data indicated the contact angle of Pn@SiO 2 microcapsules was significantly improved and the leakage rate of Pn@SiO 2 microcapsules was reduced to different degrees by modification with silane coupling agents. The main reason is that the modification of silane coupling agents improves the wettability of silica on the surface of paraffin wax, which makes the aggregation of silica on the surface of paraffin more efficient. Among them, the Pn@SiO 2 microcapsules modified by MPS showed the most significant reduction in leakage rate, which was reduced from 8.38 % to 1.24 %. Pn@SiO 2 microcapsules modified by MPS not only showed outstanding latent heat-storage/release capability with a high capacity but also exhibited good shape stability, high thermal stability and excellent phase-change reliability and durability.

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“…

{{T}_{m}}

and

{{T}_{c}}

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {R}_{h}={{{\rm \Delta }{\rm H}}\over{{t}_{end}-{t}_{onset}}}\hfill\cr}}

…”

Section: Methodsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Paraffin@Silica Microencapsulated Phase Change Materials with Improved Anti‐Leakage Properties

Zhang

Cai

et al. 2022

ChemistrySelect

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“…Furthermore, in the presence of the Cu2O shell, the microcapsules showed a gas-sensitive property to some harmful organic gases. Furthermore, Cia et al ( 2022) [165] successfully fabricated paraffin mPCMs (Pn@PWO) with lead tungstate (PbWO4) shell by in situ precipitation and self-assembly methods. The amount of trisodium citrate dihydrate (TSCD) plays significant role in determining the capsules' surface morphology, including a spindle or spherical shape, through control growth of PbWO4 shell.…”

Section: Peer Review 26mentioning

confidence: 99%

“…The amount of trisodium citrate dihydrate (TSCD) plays significant role in determining the capsules' surface morphology, including a spindle or spherical shape, through control growth of PbWO4 shell. The as-prepared mPCMs possess a high latent Furthermore, Cia et al (2022) [165] successfully fabricated paraffin mPCMs (Pn@PWO) with lead tungstate (PbWO 4 ) shell by in situ precipitation and self-assembly methods. The amount of trisodium citrate dihydrate (TSCD) plays significant role in determining the capsules' surface morphology, including a spindle or spherical shape, through control growth of PbWO 4 shell.…”

Section: Peer Review 26mentioning

confidence: 99%

Methods for the Synthesis of Phase Change Material Microcapsules with Enhanced Thermophysical Properties—A State-of-the-Art Review

Al‐Shannaq

Farid

Ikutegbe

2022

Micro

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Thermal energy storage (TES) has been identified by many researchers as one of the cost-effective solutions for not only storing excess or/wasted energy, but also improving systems’ reliability and thermal efficiency. Among TES, phase change materials (PCMs) are gaining more attention due to their ability to store a reasonably large quantity of heat within small temperature differences. Encapsulation is the cornerstone in expanding the applicability of the PCMs. Microencapsulation is a proven, viable method for containment and retention of PCMs in tiny shells. Currently, there are numerous methods available for synthesis of mPCMs, each of which has its own advantages and limitations. This review aims to discuss, up to date, the different manufacturing approaches to preparing PCM microcapsules (mPCMs). The review also highlights the different potential approaches used for the enhancement of their thermophysical properties, including heat transfer enhancement, supercooling suppression, and shell mechanical strength. This article will help researchers and end users to better understand the current microencapsulation technologies and provide critical guidance for selecting the proper synthesis method and materials based on the required final product specifications.

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PbWO₄ Synergistically Modified with Styrene Maleic Anhydride and Bis(dioctyl pyrophosphate) Ethylene Titanate in Highly Filled Polymer Fibers for Enhanced γ‐Ray Shielding Safety and Wear Comfort of Articles

Mai

Zhang

Wang

et al. 2022

Adv Materials Technologies

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personal protective equipment (PPE) is of vital importance to radiation protection safety of nuclear personnel involved. [4][5][6] Currently, the PPE is fabricated with rubber-based composites containing high atomic number (high Z) fillers such as lead (Pb), tungsten (W), and bismuth (Bi). [7][8][9][10][11] Although it has various merits such as flexibility for wearability, its poor permeability for air and water vapor is negative to channel sweat away during work, which causes reduced wear comfort and then affects working efficiency. [12,13] Therefore, it is urgent to develop flexible materials with permeability for enhanced wear comfort and radiation protection safety of PPE.Many studies have attached importance to fabrics bearing heavy metals to meet the requirements. This is due to the fact that overlapped fabrics shield high-energy photons meanwhile offer curving passages for permeability. Coating high-Z fillers on textiles has the ability to shield highenergy photons while it tends to be peeled off and reduce permeability. [14][15][16][17][18][19] Alternatively, polymer fibers containing high-Z fillers for fabrics seems to address wear comfort meanwhile radiation shielding safety. Some high-Z fillers, such as Bi 2 O 3 , WO 3 , Bi 2 WO 6 , and BaSO 4 , have been intensely applied to fabricated various polymer fibers for shielding X-rays. [20][21][22][23][24][25] Note that current polymer fibers are generally filled with no more than 40 wt% fillers. This is due

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Morphology-controllable paraffin@lead tungstate microcapsules for gamma radiation shielding and thermal energy storage

Cited by 26 publications

References 55 publications

Paraffin@Silica Microencapsulated Phase Change Materials with Improved Anti‐Leakage Properties

Paraffin@Silica Microencapsulated Phase Change Materials with Improved Anti‐Leakage Properties

Methods for the Synthesis of Phase Change Material Microcapsules with Enhanced Thermophysical Properties—A State-of-the-Art Review

PbWO₄ Synergistically Modified with Styrene Maleic Anhydride and Bis(dioctyl pyrophosphate) Ethylene Titanate in Highly Filled Polymer Fibers for Enhanced γ‐Ray Shielding Safety and Wear Comfort of Articles

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Morphology-controllable paraffin@lead tungstate microcapsules for gamma radiation shielding and thermal energy storage

Cited by 26 publications

References 55 publications

Paraffin@Silica Microencapsulated Phase Change Materials with Improved Anti‐Leakage Properties

Paraffin@Silica Microencapsulated Phase Change Materials with Improved Anti‐Leakage Properties

Methods for the Synthesis of Phase Change Material Microcapsules with Enhanced Thermophysical Properties—A State-of-the-Art Review

PbWO4 Synergistically Modified with Styrene Maleic Anhydride and Bis(dioctyl pyrophosphate) Ethylene Titanate in Highly Filled Polymer Fibers for Enhanced γ‐Ray Shielding Safety and Wear Comfort of Articles

Contact Info

Product

Resources

About

PbWO₄ Synergistically Modified with Styrene Maleic Anhydride and Bis(dioctyl pyrophosphate) Ethylene Titanate in Highly Filled Polymer Fibers for Enhanced γ‐Ray Shielding Safety and Wear Comfort of Articles