Construction of double cross-linking PEG/h-BN@GO polymeric energy-storage composites with high structural stability and excellent thermal performances

Jing, Rui; Zhang, Huanzhi; Huang, Chao‐Wei; Su, Fucai; Wu, Bojing; Sun, Zongxu; Xu, Fen; Sun, Lin; Peng, Hongliang; Lin, Xiangcheng; Li, Bin; Zou, Yongjin; Chu, Hailiang; Huang, Pengru; Yan, Erhu

doi:10.1016/j.colsurfa.2021.128193

Cited by 15 publications

(6 citation statements)

References 34 publications

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“…Apparently, some of the α crystals of octadecane were transferred to β crystals after the OD impregnation into PCC-3-800, which indicated that the PCC-3-800 reticular pore structure enhanced the integrity of the crystallization of the β crystals of octadecane and caused a heterogeneous nucleation effect [ 15 , 54 ]. The high-intensity diffraction peaks of PEG/PCC at 2θ = 19.08° and 23.18° represented the characteristic crystal planes (120) and (112) [ 4 , 55 , 56 , 57 ], which reversed the intensity of the peak compared to that of the pure polyethylene glycol, suggesting that the PCC-3-800 reticular pore structure enhanced the crystalline integrity of the polyethylene glycol for crystal plane (120) and induced a heterogeneous nucleation effect. All the other weak peaks of PEG/PCC showed a weakening trend, which implied that the presence of PCC-3-800 had a limiting effect on the crystallization of the polyethylene glycol.…”

Section: Resultsmentioning

confidence: 99%

Biomass-Based Shape-Stabilized Composite Phase-Change Materials with High Solar–Thermal Conversion Efficiency for Thermal Energy Storage

Gao,

Du,

Yang

et al. 2023

Polymers

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To alleviate the increasing energy crisis and achieve energy saving and consumption reduction in building materials, preparing shape-stabilized phase-change materials using bio-porous carbon materials from renewable organic waste to building envelope materials is an effective strategy. In this work, pine cone porous biomass carbon (PCC) was prepared via a chemical activation method using renewable biomaterial pine cone as a precursor and potassium hydroxide (KOH) as an activator. Polyethylene glycol (PEG) and octadecane (OD) were loaded into PCC using the vacuum impregnation method to prepare polyethylene glycol/pine cone porous biomass carbon (PEG/PCC) and octadecane/pine cone porous biomass carbon (OD/PCC) shape-stabilized phase-change materials. PCCs with a high specific surface area and pore volume were obtained by adjusting the calcination temperature and amount of KOH, which was shown as a caterpillar-like and block morphology. The shape-stabilized PEG/PCC and OD/PCC composites showed high phase-change enthalpies of 144.3 J/g and 162.3 J/g, and the solar–thermal energy conversion efficiencies of the PEG/PCC and OD/PCC reached 79.9% and 84.8%, respectively. The effects of the contents of PEG/PCC and OD/PCC on the temperature-controlling capability of rigid polyurethane foam composites were further investigated. The results showed that the temperature-regulating and temperature-controlling capabilities of the energy-storing rigid polyurethane foam composites were gradually enhanced with an increase in the phase-change material content, and there was a significant thermostatic plateau in energy absorption at 25 °C and energy release at 10 °C, which decreased the energy consumption.

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Section: Resultsmentioning

confidence: 99%

Biomass-Based Shape-Stabilized Composite Phase-Change Materials with High Solar–Thermal Conversion Efficiency for Thermal Energy Storage

Gao,

Du,

Yang

et al. 2023

Polymers

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“…It, thus, drives a motivation to develop the technology for solid loading to improve the stability of phase change. The various techniques for fixed loading include chemical grafting, physical blending, porous material adsorption, and microcapsule coating [12][13][14], etc. The chemical grafting method, which involves the formation of a covalent bond between the PEG and the organic matrix, has aroused extensive research in the PCM field.…”

Section: Introductionmentioning

confidence: 99%

One-Step Bulk-Suspension Polymerization of Polyethylene Glycol-Based Copolymer Microspheres for Phase Change Textiles

et al. 2023

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The paper presents a feasible strategy through one-step bulk-suspension polymerization, grafting PEG onto an in situ synthesized copolymer. In more detail, PEG was grafted onto a homemade polystyrene/maleic anhydride copolymer (SMA) via bulk-suspension polymerization with poly(vinyl alcohol) as a suspending agent. According to the optimal reaction conditions, the grafting rate of PEG was 56.2% through chemical titration experiments. At the same time, the quantitative relationship between the grafting rate and enthalpy was demonstrated for the first time in a PEG-based solid–solid phase change material (S-SPCM). Morphology observation revealed that the obtained S-SPCM is made up of white microspheres of approximately 100–150 μm. The powdery product polystyrene/maleic anhydride grafted polyethylene glycol (SMA-g-PEG) obtained through bulk-suspension polymerization endowed that the whole product could be used directly as a phase change material without postprocessing. The melting enthalpy and crystallization enthalpy of SMA-g-PEG were 79.3 J/g and 76.9 J/g, respectively. Based on the effective fixed load of PEG, the macrostructure of SMA-g-PEG was almost unchanged at 70 °C compared with the macrostructures at 20 °C, and the latent heat of SMA-g-PEG was decreased slightly after 1000 thermal cycles. Overall, the obtained SMA-g-PEG can be used as a filler in insulation materials and composited with fibers to obtain phase change thermoregulated smart textiles.

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“…The disadvantages of inorganic PCMs, such as strong corrosion, large subcooling, and phase separation, also hinder their application. As a result, organic PCMs are preferred by researchers due to their high energy storage capacity, good physical and chemical stability, non-toxicity, low price, and small subcooling [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

N-Octadecane Encapsulated by Assembled BN/GO Aerogels for Highly Improved Thermal Conductivity and Energy Storage Capacity

Hui

Zhang

et al. 2023

Nanomaterials

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The rapid development of industry has emphasized the importance of phase change materials (PCMs) with a high latent-heat storage capacity and good thermal stability in promoting sustainable energy solutions. However, the inherent low thermal conductivity and poor thermal-cycling stability of PCMs limit their application. In this study, we constructed three-dimensional (3D) hybrid graphene aerogels (GBA) based on synergistic assembly and cross-linking between GO and modified hexagonal boron nitride (h-BN). Highly thermally conductive GBA was utilized as the supporting optimal matrix for encapsulating OD, and further implied that composite matrix n-octadecane (OD)/GBA composite PCMs were further prepared by encapsulating OD within the GBA structure. Due to the highly thermally conductive network of GBA, the latent heat of the composite PCMs improved to 208.3 J/g, with negligible changes after 100 thermal cycles. In addition, the thermal conductivity of the composite PCMs was significantly enhanced to 1.444 W/(m·k), increasing by 738% compared to OD. These results sufficiently confirmed that the novel GBA with a well-defined porous structure served as PCMs with excellent comprehensive performance offer great potential for thermal energy storage applications.

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Construction of double cross-linking PEG/h-BN@GO polymeric energy-storage composites with high structural stability and excellent thermal performances

Cited by 15 publications

References 34 publications

Biomass-Based Shape-Stabilized Composite Phase-Change Materials with High Solar–Thermal Conversion Efficiency for Thermal Energy Storage

Biomass-Based Shape-Stabilized Composite Phase-Change Materials with High Solar–Thermal Conversion Efficiency for Thermal Energy Storage

One-Step Bulk-Suspension Polymerization of Polyethylene Glycol-Based Copolymer Microspheres for Phase Change Textiles

N-Octadecane Encapsulated by Assembled BN/GO Aerogels for Highly Improved Thermal Conductivity and Energy Storage Capacity

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