Phase Change Latent Heat Research Articles

Formulation and phase change mechanism of Capric acid/Octadecanol binary composite phase change materials

Fatty acids and fatty alcohols have the advantages of high latent heat of phase change, good thermal stability, no corrosion, no supercooling and phase separation. They can be used as phase change energy storage materials for passive temperature control. However, their popularization and application are limited because of their high phase transition temperature and narrow phase transition range. This study develops a novel binary composite phase change materials (PCMs) of Capric acid (CA) and Octadecanol (OD) by a melt blending method. The theoretical calculation and hot melt-step cooling were carried out to generate an optimal molar ratio, followed by DSC thermal characterization. ATR-FTIR and XRD were performed to determine the phase transformation and chemical and structure changes. The results showed the binary CA-OD binary composite PCMs has a high latent heat of fusion, a melting temperature Tm = 26.48 °C and △H = 181.06 J/g at optimal mass ratio of 85.15:14.86 (CA:OD), which is higher than the theoretically predicted latent heat of phase transition, indicating a good synergistic effect beneficial to energy storage. Solid CA exists in the form of dimer and –OH in solid OD exists in form of association, and intermolecular hydrogen bonds weakens in liquid. There are hydrogen bonds in the CA-OD binary composite PCMs, and the molecular structure changes before and after the phase transformation were similar to that of a single component CA or OD. The crystal structures of the two compounds also change and the latent heat of phase transformation is improved. Finally, through TG and high and low temperature cycle test, CA-OD binary PCMs demonstrates good thermal stability and practicability in the field of building energy conservation.

High thermal conductive and anti-leakage composite phase change material with halloysite nanotube for battery thermal management system

The thermal safety of battery module is demonstrated as the main bottleneck to hinder wider adoption of electric vehicles (EVs). It is vital to explore efficient thermal management system to satisfy the rapidly increasing need for EVs. Composite change materials (CPCMs) as passive cooling system has greatly potential application in battery packs. However, the inherent leakage and low thermal conductivity are restricted its widely utilized in practical applications. In this study, the high thermal conductivity CPCM with PEG/EG/HNT@AP has successfully prepared through a synergistic method of in situ chemical reduction and physical blending technology. Polyethylene glycol (PEG) as the phase change matrix and halloysite nanotube (HNT) as the support material can provide cross-linked network to prevent its leakage. Especially, the expanded graphite (EG) and silver nanoparticles (AgNPs) assembled into HNT (HNT@AP) play a synergistic role to construct an interconnected thermal network. The results indicates that the thermal conductivity is increased to 1.15 W·m−1·K−1 and the latent heat of phase change can maintain to 103.65 J·g−1, when the content of HNT@AP is 40 %. In addition, the battery module with PEG/EG/HNT@AP and PEG/EG/ER are designed and measured during charge and discharge cycling process, respectively. It reveals that battery module with PEG/EG/HNT@AP can exhibit excellent thermal management effect, which temperature was controlled below 60 °C at 3C discharge rate even under 35 °C ambient temperature. Therefore, this work sheds light on rational design of high thermal conductive composite material to improve thermal safety of battery pack in the EVs.

Modified sodium acetate trihydrate/expanded perlite composite phase change material encapsulated by epoxy resin for radiant floor heating

In this study, sodium acetate trihydrate was modified with urea, ethylene glycol, and disodium hydrogen phosphate dodecahydrate. The modified phase change material was impregnated into expanded perlite to obtain a composite phase change material, which was encapsulated with epoxy resin as the coating to obtain a coated composite phase change material with a phase change temperature of 46.4 °C, a latent heat of phase change of 132.7 J/g, and a low supercooling temperature of 0.6 °C. Leak tests and thermal cycle stability showed that the coating could effectively slow down the escape rate of the liquid phase and solve the macroscopic leakage problem. Moreover, the decrease in latent heat was only 1.8 % after 100 cycles, demonstrating excellent thermal cycle stability. The morphology and elemental distribution of the modified phase change materials and coatings were studied. In addition, laboratory insulation simulation tests were conducted, and the coated composite phase change material panels showed a significant delay in temperature reduction, while the insulation box showed longer lasting thermal performance. The excellent properties of the material find their application in radiant floor heating systems and play a key role in the expansion of coated phase change materials.

Numerical Analysis of Shield Tunnelling Breakthrough Working Shaft by Artificial Ground Freezing Method under Extreme Conditions Considering Phase Change Latent Heat

The artificial ground freezing method has been widely used in shield tunneling breakthrough working shafts. The freezing effect was mainly considered in the previous research, and the heat generation of the shield machine was not considered, which has great influence in actual engineering. In this paper, a coupling calculation model, considering phase change latent heat, is establishes that by containing the freezing process and heat generation of the shield machine, the model is verified. A numerical simulation is carried out for several working conditions that may occur in actual projects, and the following conclusions are obtained. Although the heat dissipated by the normal tunneling of the shield machine will melt the frozen soil curtain that originally meets the design requirements, the thickness of the frozen soil curtain after melting cannot reach the initial design, though it is still within the safe range. In the process of a continuous rotation working condition, the bottom and sides of a cup-shaped frozen soil curtain are partially melted in the early 6 day stay of the shield machine, and the thickness is reduced to a relatively stable value of 0.8 m. In a temporary shutdown working condition, when the contact surface temperature between the shield machine shell and the frozen soil drops to −12 °C after almost 4 days of shutdown, the shield machine may not keep tunneling forward due to the freezing effect. The research results will benefit the freezing design and management of the shield tunneling breakthrough working shaft under extreme conditions.

Scanning strategy optimization for the selective laser melting additive manufacturing of Ti6Al4V

Minimizing the residual stress and deformation of the manufactured product consequent to the selective laser melting (SLM) process is always a primary focus in the realm of additive manufacturing. This paper studied the influence of different scanning strategies on the thermal-mecha nical characteristics of SLM of Ti6Al4V. Numerical simulation and experimental tests were employed concerning three scanning strategies of the SLM process: Z-shaped, outer spiral, and inner spiral. Allowing for the latent heat of phase change, thermal radiation, and convection effect, the temperature history, and distribution of the specimen were analyzed, based on which the indirect thermal-mechanical coupling method was engaged for the residual stress and deformation analysis. The result shows good consistency in deformation characteristics between the numerical prediction and experimental observation. A reasonable scanning strategy is beneficial to mitigating the non-uniform distribution of the residual stress, and compared with the outer spiral and inner spiral strategies, the z-shaped scanning strategy may have a better effect in forming accuracy and mechanical properties.

Numerical Simulation of bio-heat transfer for cryoablation of regularly shaped tumours in liver tissue using multiprobes

The present study focuses upon pre-operative planning strategy for cryosurgical treatment of multiple regularly shaped tumours inside a three dimensional liver tissue. Numerical simulations provide an optimal framework to predict the number of cryo-probes, their placement, operation time and thermal necrosis to the tumour and surrounding healthy tissues. An efficient cryosurgery process requires keeping the tumour cell under lethal temperature which is between −40 °C to −50 °C. The freezing process of undesired tumour tissues involves phase transition from liquid phase to solid phase, the accurate capturing of transition front and size or location of ice balls generated in the process are the important factors of cryosurgery. In this study, fixed domain heat capacity method has been utilized to take into account the latent heat of phase change in bio-heat transfer equation. The ice balls generated with different number of probes haven been analysed. Numerical simulations have been carried out using standard Finite Element Method with COMSOL 5.5 and results obtained are validated with previous studies.

Effect of shape-stable phase change materials on heat transfer characteristics of ground source heat pump backfill materials

Ground source heat pump (GSHP) systems can utilize shallow geothermal energy to realize low-carbon buildings. The backfill material used in GSHPs directly affects the heat exchange between the ground heat exchanger and soil. Phase change materials (PCMs) can utilize the phase change process to realize both the storage and release of energy. Applying PCMs to GSHP backfill materials may be beneficial towards improving efficiency and saving energy. In this study, decanoic acid and lauric acid were used as composite PCM and graphite powder was added to enhance thermal conductivity. Expanded perlite was used as absorbent and silica sol was used to shape and encapsulate PCM. A shape-stable phase change material (SSPCM) was prepared for GSHP backfilling. Basic characteristics including thermal conductivity of SSPCMs were assessed and analyzed, and one-dimensional heat transfer experiments were carried out. The results showed that at a decanoic acid to lauric acid mass ratio of 7:3, the phase change temperature of binary organic acids is 19.9 °C, and the latent heat of phase change is 124.03 kJ/kg. At a 60% mass content percentage of PCMs, the amount of added graphite powder was 4%, the thermal conductivity of the SSPCM encapsulated by silica sol was 0.1431 W/(m·K), and the mass loss rate of SSPCM was less than 5% after 25 high and low temperature cycles. Materials with the above parameters have suitable comprehensive properties and can be used as preferred phase change backfill material for GSHP. The thermal conductivity of the backfill material is negatively correlated with the mixing ratio of SSPCM, and positively correlated with water content. At an intermittent ratio of 10:14, after 10 h of heating, the temperature range of the phase change backfill sample was 0.38–7.45 °C lower than that of the original soil backfill sample; after 14 h of cooling, the temperature of the phase change backfill sample was closer to the initial temperature. Therefore, adding SSPCM to the backfill material is beneficial to the long-term intermittent operation of GSHPs.

Study on optimization of thermal property parameters of phase change wallboard and its application simulation in the building

In this paper, a parameter-based design approach for phase change wallboard is presented. Based on existing gypsum composite phase change materials, COMSOL simulation software was used to understand the influence of parameters including phase change temperature, wallboard thickness, thermal conductivity, and latent heat value on the thermal performance of phase change wallboard and analyze different indoor environments and energy-saving efficiency of various parameter schemes in practical application. The effect of those parameters for phase change wallboard that used in outer envelopes and inner partitions is also compared to determine an optimized scheme for phase change wallboard applied in the city of Xi'an. The results demonstrate the most important element that affects the inner surface temperature is the thickness of the phase change wallboard, then the phase change temperature, and last thermal conductivity. Using integrated PCM on the envelope is not only beneficial to adjust the indoor thermal environment and reduce energy consumption, but also help to achieve the best cooling and energy conservation effects by optimizing material parameters in practice. The phase transition temperature of PCM applied in walls should approach mean temperature. Furthermore, exterior walls need PCW with larger thickness and smaller thermal conductivity, and interior walls equip PCW with higher thermal conductivity and latent heat. The optimized scheme can reduce the average room maximum temperature by 1.24 °C and the cooling load by 953 W per square meter.

Temperature dependence of thermophysical properties of polyethylene glycol in solid/liquid phase change region

The knowledge of the thermophysical properties of phase change materials (PCMs) is of great importance in the design of thermal energy storage systems. In this work, several thermophysical properties of four PEGs with different molecular weights from 800 to 2000 were studied experimentally. Differential scanning calorimetry (DSC) was used to study the phase change temperatures and latent heat in the melting and crystallization processes of PEGs. The thermal conductivities of PEGs covering both solid and liquid phases were measured by a transient hot-wire thermometer at a temperature range from 283.15 to 353.15 K. Density and viscosity of liquid PEGs were determined by densimeter and viscometer, respectively. Phase change latent heat, thermal conductivity, and density increase with PEG molecular weight, which indicates that PEGs with higher molecular weight show better energy storage ability per volume. Phase change temperatures vary with molecular weight, so a wide range of operating temperatures can be satisfied using different molecular weight PEGs. Viscosity increases dramatically with PEGs molecular weight, so higher pump energy consumption is needed for larger PEG when it flows in the liquid phase. Furthermore, available literature data were used to compare with our results, our data agree well with most literature data.

The investigation of heat storage efficiency of salt gradient solar pond with and without phase changing materials

AbstractIn this work, the effect of with and without phase change materials for long‐term heat storage of a salt gradient solar pond was investigated both experimentally and numerically. Some phase change materials, whose thermal values are close to the operating temperature of the solar pond were selected and examined from fatty acids (camphene, decanoic acid, and palmitic acids) and paraffin derivatives (paraffin wax, C20‐C33, and C16‐C28). A series of experimental studies were then performed with phase change temperature, latent heat and thermal stability, a differential scanning calorimetry, and a thermogravimetric analyzer for sheath, decanoic acid, and palmitic acid. The temperature and enthalpy curve of each phase change material was calculated by months and compared to the solar pond and the longest‐term heat storage was determined. Study shows that the maximum efficiency of the solar pond can be achieved with 24.58% Camphene in November and 22.57% Paraffin C20‐C33 in December. Thus, the camphene shows the best longest‐term heat storage performance thanks to its high melting temperature and density and latent fusion heat. It is one of the best suitable options to improve the heat storage performance of solar ponds.

Preparation, Phase Diagrams and Characterization of Fatty Acids Binary Eutectic Mixtures for Latent Heat Thermal Energy Storage

A series of fatty acid binary eutectic mixtures were prepared by using capric acid, lauric acid, myristic acid, palmitic acid, and stearic acid (CA, LA, MA, PA, and SA) as raw materials. The phase diagrams of these fatty acid binary eutectic mixtures were drawn using the Schrader equation. The thermal properties and structure were determined using differential scanning calorimetry (DSC). The thermal stability was assessed using thermogravimetric analysis (TGA) and thermal cycling tests. DSC analysis results showed that the phase change temperature of these fatty acid binary eutectic mixtures is between 17.7 °C and 57.1 °C, and the phase change latent heat is between 145.2 J/g and 193.0 J/g. The results of TGA and thermal cycle tests showed that these fatty acid binary eutectic mixtures have good thermal stability and long-term cycle thermal reliability. These results indicated that these binary eutectic mixtures of fatty acids were suitable as thermal energy storage materials for low-temperature systems.

Computational Study of Phase Change Heat Transfer and Latent Heat Energy Storage for Thermal Management of Electronic Components Using Neural Networks

The phase change heat transfer of nano-enhanced phase change materials (NePCMs) was addressed in a heatsink filled with copper metal foam fins. The NePCM was made of 1-Tetradecanol graphite nanoplatelets. The heatsink was an annulus contained where its outer surface was subject to a convective cooling of an external flow while its inner surface was exposed to a constant heat flux. The governing equations, including the momentum and heat transfer with phase change, were explained in a partial differential equation form and integrated using the finite element method. An artificial neural network was employed to map the relationship between the anisotropic angle and nanoparticles fractions with the melting volume fraction. The computational model data were used to successfully train the ANN. The trained ANN showed an R-value close to unity, indicating the high prediction accuracy of the neural network. Then, ANN was used to produce maps of melting fractions as a function of design parameters. The impact of the geometrical placement of metal foam fins and concentrations of the nanoparticles on the surface heat transfer was addressed. It was found that spreading the fins (large angles between the fins) could improve the cooling performance of the heatsink without increasing its weight. Moreover, the nanoparticles could reduce the thermal energy storage capacity of the heatsink since they do not contribute to heat transfer. In addition, since the nanoparticles generally increase the surface heat transfer, they could be beneficial only with 1.0% wt in the middle stages of the melting heat transfer.

Preparation of n-Octadecane@MF resin microPCMs and its application in temperature control of esterification reactions

Reaction thermal runaway accidents occur frequently and occupy a high proportion in chemical accidents. Reducing accidents by controlling reaction temperature is of great implication to enhance the safety level of chemical processes. Phase change materials (PCMs) have a good energy storage potential, which can rapidly convert the reaction exotherm in the reaction process into its own phase change latent heat, urgently control the reaction temperature, and enhance the process thermal safety level. In this study, using n-octadecane as the core and melamine-formaldehyde (MF) resin as the shell, microencapsulated phase change materials (microPCMs) was made, which has a smooth spherical shape, good thermal stability, and a phase change enthalpy up to 162.87 J/g. The homogeneous esterification reaction of 2-butanol (2 B) and propionic anhydride (PA) was selected as the target reaction, and then the reaction was scaled up equivalently to investigate the effect of amplification to the reaction system. The results indicated that the temperature control of the esterification reaction system by microPCMs is the synergy between physical inhibition and chemical inhibition. The reaction temperature could be controlled by adding microPCMs, and the temperature control effect improved with the increase of microPCMs addition. In large scale reactors, microPCMs still has certain temperature control ability after being added.

Performance improvement and investigation of radiation heat transfer of chloride salt as high-temperature heat storage medium

• Synthesis of carbon doped molten salt composites by reaction method. • High absorptivity material combined with translucent molten salt. • Research on radiation heat transfer based on Finite Element Method (FEM). • Molten salts exhibit good thermal conductivity and radiative properties. The development of solar phase change thermal storage technology is significant for the efficient use of energy. In this study, molten chloride salt was used as a high-temperature phase change thermal storage material to improve the heat transfer performance of the chloride salt by reacting citric acid with sodium chlorite to generate a flaky carbon morphology in the molten salt. The results indicated that the carbon generated by the reaction was uniformly distributed in the molten salt matrix, and the modified molten salt obtained a high latent heat of phase change with a maximum latent heat of phase change of 227.3 J·g –1 , which was 13.7% higher than that of the undoped molten salt, and the maximum thermal conductivity could reach 2.313 W·m –1 ·K –1 , which effectively improved the applicability range. In addition, the combination of ANSYS simulations and the constructed temperature measurement platform showed that the radiation heat transfer effectively improved the temperature distribution of the molten salt in the high-temperature stage. This study may promote the research of the heat transfer behavior of molten salt at high temperature and play an important role in concentrated solar power generation.

Hierarchical Ni-plated melamine sponge and MXene film synergistically supported phase change materials towards integrated shape stability, thermal management and electromagnetic interference shielding

1 Hierarchical Ni@MS/RCG was prepared by electroless plating and sol-gel methods. 2 MX/Ni@MS/RCG/PEG PCMs were fabricated via a facile encapsulation approach. 3 MX/Ni@MS/RCG/PEG PCMs exhibit good shape stability and superb cyclic reliability. 4 MX/Ni@MS/RCG/PEG PCMs show high thermal conductivity and EMI shielding performance. Along with the integrated and miniaturized development of advanced electronic devices, phase change materials (PCMs) simultaneously with efficient thermal management and high electromagnetic interference (EMI) shielding effectiveness (SE) are ungently demanded. Herein, the shape-stabilized MXene/Ni-platted melamine sponge/Regenerated cellulose/Graphene nanoplate/Polyethylene glycol (MX/Ni@MS/RCG/PEG) composite PCMs comprising hierarchical Ni@MS/RCG and MXene film were fabricated via a facile encapsulation approach. Hierarchical Ni@MS/RCG hybrid aerogel was prepared by electroless plating and sol-gel methods, and MXene film was obtained using vacuum-assisted filtration procedure. The synergistic effect of conductive Ni@MS/RCG networks and tight MXene film endows MX/Ni@MS/RCG/PEG composite PCMs with good shape stability, high cyclic reliability, large latent heat of phase change (154.3 J g –1 ), excellent thermal conductivity (TC, 0.47 W m –1 K –1 ) and favorable EMI shielding performance (32.7 dB). The TC of acceptable 0.47 W m –1 K –1 is observed for MX/Ni@MS/RCG-5/PEG at a rather low GNP content of merely 0.39 wt%. In addition, the temperature variation of MX/Ni@MS/RCG-5/PEG is a lot faster than that of pure PEG in the heating/cooling process, revealing the remarkable energy storage and release efficiency for the composite PCMs. This investigation has taken an important step towards shape-stabilized composite PCMs with both effective thermal management and high EMI SE for promising applications in electronic packaging and advanced energy.

Surface grafting POSS to improve the hydrophobicity and fire safety of polyrotaxane based smart phase change materials

Polyethylene Glycol (PEG)-based flexible phase change materials have broad and practical application value in thermal management of flexible electronic devices. Considering the typical application cases and safety of phase change materials (PCMs), in this work, we grafted molecular nanoparticles, POSS, with both hydrophobic and flame retardant functions to the surface of PLR sheets through amidation reaction. The successful grafting of POSS has been fully verified by Fourier-transform infrared spectroscopy, energy dispersive spectroscopy and surface contact angle. The formation of the cross-linked structure and the introduction of POSS make the phase change latent heat of the phase change material slightly decrease from 102.4 J g−1 to 94.4 J g−1, but there is still a high retention rate. It is worth pointing out that the PCMs have excellent shape stability and leakage resistance, cycle stability, and shape memory performance (Rf-99%, Rr-99%). The introduce of cross-linked structure and POSS significantly enhanced the Young’s modulus and tensile strength of the PCM. The surface POSS functionalization endowed the PCM with significantly enhanced hydrophobicity. Specifically, the contact angle of the material was significantly increased from 71° for PLR to 123° for POSS-PLR, and it also had enhanced fire safety with pHRR reduction by 18.4% and THR reduction by 19.1%.

Lightning damage of composite material driven by multi-physics coupling

Lightning damage of carbon fiber/epoxy composite material results from multi-physics coupling effects including electricity, magnetism, heat and force, etc. Physical behaviors of lightning magnetic fluid and structural response of composite laminate are numerical simulated based on Magneto Hydro Dynamics (MHD) and thermo-electric coupling theory, respectively. The radial basis function (RBF) and high precision dynamic mesh technology are proposed to exchange data of multi-physics and structural response at the interface. Temperature dependent material parameters and latent heat of phase change are considered to reveal lightning damage mechanism of composite laminate. Thermal decomposition, ablation area and depth of composite laminate are predicted by numerical approach and verified through lightning test.

Influence of thermal cycling on stability and thermal conductivity of nanofluid ice slurry

Nanofluid ice slurry has the advantages of large phase change latent heat, high energy storage density and cooling rate. In this article, a two-step approach was used to prepare water-based graphene oxide (GO), Al2O3, and GO-Al2O3 hybrid nanofluids. The effects of thermal cycling on the stability and thermal conductivity of nanofluid ice slurry were also investigated. Moreover, thermal conductivity model considering thermal cycling and mass fraction was proposed. Results show with the increase of the number of phase change cycles, the stability of nanofluids decreases gradually, and tends to be stable after 6 cycles. The lower the minimum temperature of the thermal cycling, the more serious the segregation of nanoparticles, the worse the stability of nanofluids after thermal cycling. In addition, multi-cycle of phase change has less influence on thermal conductivity of GO nanofluid than that of non-phase-change, although the influence is a little larger at the dilute concentration range. The thermal conductivity of GO-Al2O3 hybrid nanofluid ice slurry is between that of GO and Al2O3 aqueous single nanofluid after phase change thermal cycling. The influence of the phase change cycles on thermal conductivity decreases with the increase of concentration, however, the smaller the concentration, the larger the thermal conductivity reduction. The hybrid nanofluid ice slurry can ensure the dispersion stability and thermal conductivity of the fluid, and its comprehensive performance is better than that of nanofluid with one type of nanoparticle.

Form-stable flexible composite multi-phase change material with high latent heat and enhanced thermal conductivity for thermal management

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.

Phase Change Energy Storage Material with Photocuring, Photothermal Conversion, and Self-Cleaning Performance via a Two-Layer Structure.

Compared with the thermal curing process, the photocuring process has advantages such as high efficiency and less energy consumption. However, the preparation of photocurable phase change materials (PCMs) with photothermal conversion and self-cleaning properties is challenging due to the conflict between the transparency required by the photocurable resin system and the opacity deduced by the large number of fillers required by photothermal conversion and the negative effect of filler steric hindrance on the reaction rate and crystallinity. In this work, a "thiol-ene" click chemical reaction induced using UV was used to prepare photocurable PCMs, followed by spraying a carboxylated multiwalled carbon nanotube (CCNT) suspension (with ethyl acetate) onto the surface to achieve an effective two-layer composite of the PCM and CCNTs, by which the rough surface of the PCM and the interaction offered by the hydrogen bonds on the interface of the PCM and the CCNTs provide sufficient adhesion for the two phases. The "thiol-ene" cross-linked polymer network provided shape stability as a support material. 1-Octadectanethiol (ODT) and beeswax (BW) were encapsulated in the cross-linked polymer network as phase change components, providing phase change latent heat. The CCNT layer provided excellent photothermal conversion and self-cleaning properties. The experimental results show that the latent heat of the PCM can reach 124.2 J/g, the water contact angle is 144°, the photothermal conversion efficiency reaches 75%, and it has significant self-cleaning performance. To the best of our knowledge, this is the first report on a photocurable PCM with photothermal conversion and self-cleaning properties.