JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2017
·Vol. 130
·期 2
·935-941
·
IF 1.953
Han Lipeng,Ma Guixiang,Xie Shaolei,Sun Jinhe,Jia Yongzhong,Jing Yan
Shape-stabilized composite phase change materials composed of sebacic acid (SA) and MCM-41 were prepared by a facile blending and impregnating method. Various characterization techniques were carried out to characterize their structural and thermal properties, including thermogravimetry (TG) analyses and differential scanning calorimetry (DSC), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy. The XRD and FT-IR results indicated the interactions between SA and MCM-41, such as the capillary force and the hydrogen bonding, resulting in the confined crystallization process. As a result, the SA that was confined was amorphous. The TG analysis results showed that the presence of MCM-41 practically resulted in an overlapping of the two decomposition stages. The DSC analysis demonstrated that a decrease in the SA content was accompanied by a continuous decrease in the melting point and phase change enthalpy of the composites.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Caishuo Hu,Zhaoying Jia,Linhai Zhu,Yuang Zhang,Shufen Zhang,Bingtao Tang
Personal thermal management (PTM) technology, which predominantly utilizes phase change materials (PCMs) has emerged as an effective strategy for mitigating thermal stress. However, how to impart intrinsic flexibility and vibrant colors to meet practical application needs remains a topic that requires further research and effort. In this thesis, a novel intrinsically flexible PCM with notable shape stability, vivid and eye-catching colors for PTM was synthesized. The flexible PCMs demonstrate a high phase change enthalpy (102.1 J/g), while maintaining thermal stability over 100 cycles. In addition, they can chemically bond with dye molecules, displaying vivid colors with extremely low dye usage (0.05 wt%). The integration of PCMs with fabrics using a hot press method produces a fabric that closely conforms to the human body and exhibits strong colorfastness, demonstrating significant potential for thermal management in specialized garments.
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 18
·9962-9967
·
IF 3.049
Yiwen Hu,Xiuduo Song,Qilong Zheng,Jiangning Wang,Jiangfei Pei
Zeolitic imidazolate framework-67 (ZIF-67), a new kind of metal–organic framework, has large surface area as well as outstanding thermal and chemical stability. In this paper, micro-sized ZIF-67 crystals were prepared and further employed as the reinforcing material to design novel paraffin-based composite phase change materials (PCMs) with a polymethyl methacrylate (PMMA) shell. The composite PCMs were fabricated by using a ZIF-67 crystal-stabilized oil-in-water (O/W) Pickering emulsion as a template. Morphologies and thermal properties of the prepared composite PCMs with different contents of ZIF-67 crystals were determined by SEM, DSC and TGA. Results showed that the ZIF-67 concentration in the emulsion system has a significant effect on the microstructure, phase change behavior and thermal stability of the resultant composite PCMs. When adding 1.5 g of ZIF-67 crystals, the resultant composite PCMs achieved a stable sphere-like structure and had about 106.06 J g−1 of latent heat. The prepared composite PCMs also exhibited a good thermal stability. Compared with pure paraffin, the thermostability of the shape-stabilized paraffin was significantly enhanced at a low content of ZIF-67 crystals.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Chengkun Zhang,Xiangjun Zheng,Ning Xie,Yutang Fang,Zhengguo Zhang,Xuenong Gao
Form-stable flexible composite phase change materials (PCMs) are widely studied on the application of thermal management of batteries . Usually, the latent heat of composite PCMs is lower than that of pure PCMs due to the existence of additive materials. More composite PCMs are needed when their latent heat is too low to meet the requirements, which limits the development of the compact structure of the thermal management system. In this work, a novel paraffin (PA) -based composite multi-phase change material (m-PCM) with high latent heat was fabricated for thermal management. PA thickened by adding styrene ethylene butene styrene block copolymer (SEBS) and expanded graphite (EG) as enhanced thermal conductivity material were loaded in phase change polymer skeleton (PPS) synthesized from polyethylene glycol (PEG). One side, PPS not only played a role on preventing the leakage of paraffin as supporting material, but also provided the extra latent heat of phase change for the composite m-PCM. On the other side, SEBS was added by increasing the viscosity of PA to solve the problem of poor compatibility between the polymer skeleton and PA. Benefiting from the additional latent heat provided by PPS and the addition of EG, the composite m-PCM exhibited the phase change enthalpies as high as about 221.3 J·g −1 while ensuring the thermal conductivity as high as 1.46 W·m −1 ·K −1 . When heated, the composite m-PCM exhibited the excellent shape-stability and flexibility. After 200 thermal cycles, the composite m-PCM performed the almost constant phase transition properties. The results demonstrate the composite m-PCM has extensive application prospects for efficient thermal management.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Chuan Li,Qi Li,Ruihuan Ge
Paraffin based composite phase change materials (PCMs) have gained intensive attentions in low temperature thermal energy storage (TES) and management application domains because of its suitable melting temperature range and advanced thermoproperties. Seeking decent structural supporting materials (SSM) and the associated manufacturing approaches that capable of fabricating paraffin composites at appropriate temperatures to avert the thermal decomposition of the paraffin particularly for low-molecule ones are in high demand. Herein, we developed a low-molecule paraffin (RT18HC) composite through a simple blending approach by using styrene-ethylene/butylene-styrene (SEBS) as SSM, and showed that such SEBS-paraffin composites could be able to fabricate at a low operation temperature of 80 °C, significantly lower than that required for the preparation of conventional high density polyethylene (HDPE)-paraffin composites. To enhance the composite effective thermal conductivity , a micro-sized graphite power as enhancer was also involved over the fabrication process. Owing to the desirable solubility of paraffin in SEBS, a crosslinking structure inlaying paraffin and graphite was formed, endowing the composite with ability to maintain the structure stabilization and eliminate the graphite sedimentation over the repeated thermal cycles. 10 wt% of SEBS gives the composite optimum formulation at which 10 wt% graphite can be involved, and also an excellent shape stability and thermal adjustment ability can be achieved.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Qiang Zhang,Bing Chen,Kun Wu,Bingfei Nan,Maoping Lu,Mangeng Lu
Phase change materials (PCMs) need to improve thermal conductivity and maintain stability to meet actual application requirements. Here, a novel composite based on hydroxylated boron nitride (BN-OH) as a thermally conductive filler with superior thermal energy storage and shape stability is reported. By combining kapok fiber (KF) and sodium alginate (SA), lightweight KF/SA aerogels were fabricated, and their highly porous but durable three-dimensional networks benefit the encapsulation of polyethylene glycol (PEG) and prevent the leakage of PEG. PCMs are prepared by vacuum-assisted impregnating of PEG into the aerogels. The thermal conductivity of 0.684 W∙m −1 ∙K −1 at 10 wt% BN-OH is greatly improved because hydroxyl groups cannot only reduce interfacial thermal resistance but form secure thermal conductive networks. In addition, this novel PCMs possesses excellent shape stability and high latent heat of fusion, and the PCMs keep their shapes stable without any leakage even is compressed upon the melting point of PEG.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
·
IF 6.9
Zhuolin Li,Zhigang Liu,Yu Fang,Hao Wu,Ran Niu,Lida Wu,Yi Li,Miao Sui,Hu Wang,Xiang Lu,Jinping Qu
Solid-solid phase change materials (SSPCMs) with low volume change, no leakage, lack of corrosion and extensive service lives are used more and more widely in the application field of thermal energy storage (TES). In this study, eco-friendly polylactic acid (PLA)/polyurethane (PU) phase change composites with good recyclability and excellent form stability for TES were obtained by melt blending in a twin-screw eccentric rotor extruder . The experimental results show that the introduction of PLA is helpful to enhance the mechanical strength and leak-free performance of the PLA/PU composites. When the content of PLA achieved 20% in the PLA/PU composites, the relative enthalpy efficiency (η) of PP-20 is 79.14%, which is beneficial for the function of TES. Especially, PP-40 showed excellent flexibility, reversibility and durability whose tensile stress (14.0 MPa) and tensile strain (48.15%) were pretty good at room temperature. After reprocessed many times, PP-40 showed good recyclability whose enthalpy of fusion reduced (60.69 J/g) but could still reach 91.51% of the original. The above results imply that the PLA/PU composites provide an efficient way for the green use and reprocessing of SSPCMs in the field of TES.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Li-Sheng Tang,Yi-Cun Zhou,Ling Zhou,Jie Yang,Lu Bai,Rui-Ying Bao,Zheng-Ying Liu,Ming-Bo Yang,Wei Yang
Energy conversion technologies and systems associated with phase change materials (PCMs) have gained great popularity recently. How to convert the heat captured from solar energy into applicable electricity is significant and challenging, in particular for stable power output. Given that three-dimensional (3D) structural scaffold can ameliorate shape stability and thermal conductivity simultaneously, a novel double-layered multifunctional 3D hybrid scaffold is developed through two-step freeze-casting to produce leakage-proof photodriven composite PCMs with enhanced thermal conductivity for efficient light-thermoelectric conversion. The as-prepared double-layered scaffold is composed of black bacterial cellulose (BC)/thermochromic particle (TP) upper layer with the function of reversible photoabsorption and white BC/boron nitride (BN) lower layer with the function of heat conduction. The resultant leakage-proof composite PCMs exhibit high thermal conductivity up to 3.26 W/(mK) at a BN loading of 16.3 vol% and improved reversible photoabsorption ability. When used as heat source in a light-thermoelectric power generation system, a long-term stable output voltage of 287 mV is generated, achieving effective conversion from renewable solar energy to applicable electricity.
研究领域:
能源材料
·
光热转换
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Zaichao Li,Yuang Zhang,Fantao Meng,Lu Liu,Ronghui Han,Shufen Zhang,Bingtao Tang
The performance of Li-ion batteries can degrade dramatically at cold ambient temperatures. The excess heat generated during battery operation can be stored by PCMs and then released at low ambient temperatures to insulate the battery. However, PCMs inevitably suffer from easy leakage and poor adaptability. In this study, we prepared a novel Oct/SEBS composite PCM and applied it in a low-temperature Li-ion battery thermal management system. The prepared Oct/SEBS has good shape stability, a sufficiently high latent heat (187.7 J/g), and thermally induced flexibility properties. In addition, the BTMS containing CPCM can exhibit excellent thermal insulation performance, which can insulate the Li-ion battery for more than 30 min even at −20 °C and increase the discharge capacity from 3.78 Ah to 5.49 Ah, which is very beneficial for the operation of the Li-ion battery at low temperatures.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ENERGY
·
2019
·
IF 8.426
Weifang Han,Chunhua Ge,Rui Zhang,Zhiyan Ma,Lixia Wang,Xiangdong Zhang
The utilization of phase change materials (PCMs) for solar energy storage and industrial waste heat recovering is essential to protect the environment and build sustainable energy infrastructure in the coming years. The low thermal conductivity, leakage of the liquid-state and poor shape stability limited their broader application in energy conversion and storage. Here, construction of boron nitride foams (BNFs) is used as the packaging materials for PCMs. The BNFs with high porosity (∼97.6%) and low density (∼1.7 mg/cm 3 ) provide sufficient space for the adsorption of PCMs. Eutectic hydrate salt (EHS) is restricted in the pores of BNFs by the weak interactions which is proved by FTIR, XRD and Raman spectroscopy. In addition, the EHS/BNF composite PCMs exhibit low supercooling degree and high latent heat when compare with the EHS/polymer. Thermal conductivity of EHS/BNF composite PCMs with 4 wt% BNFs is 10.37 times higher than that of the pure PCMs and 2.24 times higher than for EHS/polymer. Especially, shape-stability and thermal reliability are still maintained after 100 thermal cycles. These results demonstrate that BNFs can be used as a promising candidate to replace polymers for energy conversion and storage field.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Waseem Aftab,Jinming Shi,Yongkang Jin,Ali Usman,Mulin Qin,Zubair Ashraf,Zhenghui Shen,Ruiqin Zhong,Ruqiang Zou
Phase change materials (PCMs) present a dual thermal management functionality through intrinsic thermal energy storage (TES) capabilities while maintaining a constant temperature. However, the practical application of PCMs encounters challenges, primarily stemming from their low thermal conductivity and shape-stability issues. Despite significant progress in the development of solid–solid PCMs, which offer superior shape-stability compared to their solid–liquid counterparts, they compromise TES capacity. Herein, a universal phase engineering strategy is introduced to address these challenges. The approach involves compositing solid–liquid PCM with a particulate-based conductive matrix followed by surface reaction to form a solid–solid PCM shell, resulting in a core-shell composite with enhanced thermal conductivity, high thermal storage capacity, and optimal shape-stability. The core-shell structure designed in this manner not only encapsulates the energy-rich solid–liquid PCM core but also significantly enhances TES capacity by up to 52% compared to solid–solid PCM counterparts. The phase-engineered high-performance PCMs exhibit excellent thermal management capabilities by reducing battery cell temperature by 15 °C and demonstrating durable solar-thermal-electric power generation under cloudy or no sunshine conditions. This proposed strategy holds promise for extending to other functional PCMs, offering a compelling avenue for the development of high-performance PCMs for thermal energy applications.
研究领域:
材料科学
·
能源工程
·
热管理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Jianjun Zhou,Xing Liu,Jianqing Zhao
The preparation of phase change materials (PCMs) with excellent heat storage capacity, shape stability, and working durability is of vital importance for their popularization and application. In this work, a series of form-stable PCMs was prepared via blending diglycidyl ether of bisphenol A (DGEBA), aliphatic anhydride with octadecyl side chains (MNAO), and paraffin together followed by thermal curing. Thanks to the plasticizing effect and self-assembly of paraffin, the crystalline behavior of paraffin and MNAO was hardly limited by the epoxy network, and the latent heat of EP/Pa-50 with 50 wt% paraffin content was high, up to 92.3 J/g. Meanwhile, EP/Pa-50 had a low supercooling extent of 11.0°C. Instead of the significant reduction in other properties of most PCMs after being blended with paraffin, the overall performance of EP/Pa-50 remained good due to the strong intermolecular interactions between paraffin and MNAO (based on their good compatibility) and the reliable epoxy network, and EP/Pa-50 exhibited excellent shape stability without the leakage problem, high thermal stability (remain stable below 170°C) and good mechanical properties (tensile strength up to 10.5 MPa). This work provides a facile strategy to prepare form-stable PCMs, which have promising application prospects in the field of thermal regulation.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）