Higher Melting Enthalpy Research Articles

Ring-expansion polymerization (REP) of L-lactide with cyclic tin catalysts – About formation of extended ring crystals and optimization of Tm and ΔHm

L-Lactide was polymerized in bulk at 140 °C with three different cyclic tin catalysts and the time was varied from 1 d up to 14 d. The MALDI TOF spectra confirmed the formation of cyclic polylactides (PLAs) and displayed a characteristic change of peak intensity distribution with formation of a “saw tooth pattern”. This pattern confirms a previous hypothesis that cyclic PLAs tend to form crystallites with extended ring conformation and relatively smooth surface. This type of crystallites is formed under thermodynamic control by transesterification on the surface of the crystallites. In this way PLAs with extraordinarily high melting temperatures (Tm's up to 200.6 °C) and extraordinarily high melting enthalpy were obtained (ΔHm's up to 105 J g−1). These ΔHm values require a revision of the maximum ΔHm value calculated in the literature for ideal PLA crystals.

Flame-retardant and thermal-protective polyimide-hydroxyapatite aerogel fiber-based composite textile for firefighting clothing

Firefighting protective clothing is an essential equipment for firefighters that can provide protection from all kinds of thermal hazards and prevent burn injuries. However, it is still a challenge to develop lightweight firefighting clothing without compromising their excellent fire-resistant and thermal-protective performance. In this study, we report a novel polyimide aerogel fiber-based double-layer smart textile comprising of flame-retardant outer layer (ambient-side) with excellent fire resistance and phase-changeable inner layer (next to skin side) with thermal-regulating function, achieving comprehensive flame-retardant and thermal-protective function. The polyimide-hydroxyapatite-reduced graphene oxide (PI-HAP-rGO) aerogel fabric (outer layer) acquires 54.7% and 70.0% reduction of peak heat release rate compared with that of pure PI aerogel fabric and commercial aramid fabric, respectively, exhibiting excellent fire resistance. The phase-changeable polyimide-hydroxyapatite/eicosane (PI-HAP/C20) fabric (inner layer) with high melting enthalpy of 193.2 J g−1 can delay the temperature rise by thermal buffering effects during the phase change process, endowing cool somatosensory temperature for firefighters. Consequently, the double-layer smart textile can extend the time (280.0 s) to pain threshold of human skin, much longer than that of the commercial aramid fabric (101.0 s) and glass fiber fabric (56.5 s), which exhibits huge potential for next-generation firefighting clothing.

Aligned channel Gelatin@nanoGraphite aerogel supported form-stable phase change materials for solar-thermal energy conversion and storage

To overcome the poor shape stability, low thermal conductivity, and weak photo response of phase change materials (PCMs), we designed a kind of Gelatin@nanoGraphite aerogel with aligned channel structure of graphite nanosheets and a new type of stable Paraffin/Gelatin@nanoGraphite composite PCMs was fabricated in this work. The graphite nanosheets were used as thermal conduction and photon absorption fillers. The microstructure, thermal conductivity, thermal stability, and solar-thermal conversion of the composite PCMs have been investigated. The results show that the rich porosity of the prepared Gelatin@nanoGraphite aerogel effectively loads a large amount of paraffin wax (>93.2 wt%). Meanwhile, the composite PCMs had anisotropic solar-thermal conversion and thermal conductivity (radial 3.75 and axial 2.59 W/(m·K)), high melting enthalpy (>146.4 J/g), and excellent phase change cycle and shape stability. This material has intensive application prospects in the fields of building energy saving, human body hyperthermia and solar energy collection system.

Luminescent push-pull triphenylamine-based molecules end-capped with various electron-withdrawing groups: Synthesis and properties

Organic luminescent materials are widely used in various electronic and optoelectronic devices upon growing demands of science and technology. Enhancement of spectral-luminescence characteristics for such materials and in depth understanding of “structure-property” relationships remain challenging tasks. Herein, we report on synthesis and comprehensive investigation of the series of novel luminescent push-pull molecules with triphenylamine unit as an electron donor block and thiophene as a π-spacer, which end-capped with various types of electron-withdrawing groups (EWGs), which are commonly used for the molecular design of various functional materials in organic electronics. The results allowed us to evaluate the impact of EWG type used on the target materials characteristics. Phenyl-substituted EWGs were found to be more suitable for the design of highly thermally and electrochemically stable materials with relatively high melting temperatures and melting enthalpies. Depending on the EWG nature luminescence maxima of the luminophores demonstrated significant variability, e.g. from 509 nm to 750 nm, while the photoluminescence quantum yield (PLQY) values laid in the range of 1–89%. All luminophores showed good compatibility with a polystyrene (PS) matrix, in which PLQYs were generally higher (up to 25-fold enhancement) compared to the corresponding solutions or polycrystalline films. The changes of spectral characteristics observed for these luminophores were well described using basic relations of the semi-empirical theory of solvatochromism. Based on lifetime of excited states measurements, it was shown that the excited state non-radiative deactivation constants values the major contributors to PLQY values in THF solutions, while increase of the PLQY values in PS films can be associated with decrease of the probability of non-radiative deactivation of the excited states.

Sodium alginate and Chitosan aided design of form-stable Polyrotaxane based phase change materials with ultra-high latent heat

We prepared a series of highly porous Polyrotaxane/sodium alginate, and Polyrotaxane/Chitosan foam alloys according to a sustainable pathway by using water as the only solvent. The foam alloys were further used as supporter materials for poly (ethylene glycol) (PEG) encapsulation, to fabricate shape-stable bio-based phase change materials (PCMs). The pore morphology and the internal interface between PEG and foam alloys were characterized by scanning electron microscope (SEM). Due to the good compatibility between foam alloys and PEG, the PCM performed perfect anti-leakage properties. The introduction of sodium alginate or Chitosan ensures the shape stability of the PCMs during the phase transition. The PCMs performed good cycle stability and showed ultra-high latent heat (171.6 J g−1–189.5 J g−1). Finally, we compared the typical indicators of this work with those reported in the literature, and the comparison highlighted that the present PCMs have the significant advantages: high melting enthalpy, convenient preparation and outstanding sustainability. Notably, the work provided a sustainable idea for the design of anti-leakage and shape-stable PEG-based PCMs.

Effects of Sorbitan Monostearate and Stearyl Alcohol on the Physicochemical Parameters of Sunflower-Wax-Based Oleogels.

A rising health concern with saturated fatty acids allowed researchers to look into the science of replacing these fats with unsaturated fatty acids. Oleogelation is a technique to structure edible oil using gelators. The present study looked for the effect of solid emulsifiers; namely, sorbitan monostearate (SP) and stearyl alcohol (SA), on the physicochemical parameters of oleogels. All the oleogels were formulated using 5% sunflower wax (SW) in sunflower oil (SO). The formulated oleogels displayed irregular-shaped wax crystals on their surface. The bright-field and polarized microscopy showed the fiber/needle network of wax crystals. Formulations consisting of 10 mg (0.05% w/w) of both the emulsifiers (SA10 and SP10) in 20 g of oleogels displayed the appearance of a dense wax crystal network. The SP and SA underwent co-crystallization with wax molecules, which enhanced crystal growth and increased the density and size of the wax crystals. The XRD and FTIR studies suggested the presence of a similar β’ polymorph to that of the triacylglycerols’ arrangement. The incorporation of SA and SP in wax crystal packing might have resulted in a lower crystallization rate in SA10 and SP10. Evaluation of the thermal properties of oleogels through DSC showed better gel recurrence of high melting enthalpy. These formulations also displayed a sustained release of curcumin. Despite the variations in several properties (e.g., microstructures, crystallite size, thermal properties, and nutrient release), the emulsifiers did not affect the mechanical properties of the oleogel. The meager amounts of both the emulsifiers were able to modulate the nutrient release from the oleogels without affecting their mechanical properties in comparison to the control sample.

Optimization of eco-friendly Pinus resinosa biochar-dodecanoic acid phase change composite for the cleaner environment

The use of waste materials in sustainable energy forms has gained a tremendous research focus, which has risen the trend of energy demand coupled with environmental concerns. Contemplating that, biochar material from organic waste has been considered as shape stabilizing materials for the organic phase change materials (PCMs) aiming for thermal energy storage (TES) applications. Pinus resinosa (PR) fruits have been pyrolyzed into biochar which has exhibited a highly porous and channel-like morphology with a surface area of 27.99 m2/g. Dodecanoic acid (DA) in 1:1, 2:1, 3:1, and 4:1 ratios have been incorporated into the PR biochar for the fabrication of shape-stabilized phase change composites (DAPR). The highest melting and solidification enthalpies are exhibited by the DAPR-4 composite, though the values are almost similar to the DAPR-3 composite. Therefore, 3:1 DA to PR biochar can be considered as the optimum ratio. The maximum encapsulation efficiency and ratio are calculated to be 32.53 % and 32.66 %, respectively while the highest melting enthalpy is obtained at 50.87 J/g. All the DAPR composites have demonstrated admirable leakage-proof performance at elevated temperatures along with the congruent thermal cycle resilience up to 100 cycles of heat charging and discharging, without any alteration in temperatures and enthalpies. The exceptional thermal and structural stabilities manifested by the DAPR samples are ascribed to the capillary action, surface functionality, and space confinement effects of the biochar.

Modification of Poplar Wood via Polyethylene Glycol Impregnation Coupled with Compression

Wood permeability and compressibility are affected by cell wall structure and chemical composition. These properties can be improved by appropriate wood pretreatments. Low-density poplar wood was converted to a more dense structure by the following steps: First, lignin and hemicellulose were removed using a mixture of NaOH and Na2SO3. Second they were impregnated with polyethylene glycol (PEG, mean molecular weight of 1200), nano-SiO2, and a silane coupling agent at atmospheric temperature and pressure. Finally, impregnated wood was compressed at 150 °C. Results showed that the tracheid lumens on the transverse section of the compressed wood almost vanished. Specifically, the lumens in the wood cells, especially those that were compressed, were almost completely filled with PEG. In FTIR, the asymmetric absorption peaks of Si–O–Si at 1078–1076 cm−1 were clearly observed, which confirms the existence of bonding between nano-SiO2 and wood. The highest melting enthalpy and crystallization enthalpy showed a heat storage capacity of modified wood, which were 20.7 and 9.8 J/g, respectively. Such phase change capabilities may have potential applications in regulating the rate of change of room temperature. In summary, the modified wood could be utilized as material for construction to conserve energy.

Development, characterization and modification of mannitol-water based nanocomposite phase change materials for cold storage

Under the background of low carbon, phase change energy storage technology has been developed rapidly, which is widely used in solar energy utilization, industrial heat recovery, building temperature regulation, and cold chain logistics. In the fields of cold chain logistics, low-temperature phase change materials(PCMs) below 0 °C have great application space. However, the application of PCM in practice is still limited by high undercooling, low thermal conductivity, low cold storage efficiency and poor stability. In this paper, mannitol aqueous solution, which mannitol can reduce the undercooling degree, an organic-inorganic composite PCM, was used as the main energy storage. After adding MgCl2 as cooling agent, a base solution of salt with phase change temperature of −6 °C and latent heat of 240.1 J/g was prepared. In order to improve the thermal conductivity and cold storage efficiency, nano-copper oxide (Nano CuO) and covalently modified hydroxylated multi-walled carbon nanotubes (MWCNT-OH) were added as thermal conductivity enhancers to prepare nano-composite phase change materials (NCPCMs). In order to obtain good dispersion effect in base solution, sodium dodecyl benzene sulfonate (SDBS), polyacrylamide (PAM) and Guar gum (GG) were used as dispersants. The effects of different dispersants on the dispersion of nanoparticles under phase transition behavior were investigated. The results showed that the anionic dispersant SDBS had poor dispersion effect in salt solution, while the polymer dispersant was better than PAM and GG. The thermal properties and cycle stability of NPCMs were also explored and the result show that the phase change system of mannitol/MgCl2@MWCNT-OH/PAM had the best thermal performance, which has the thermal conductivity of 0.685 W/(m K), increased by 18.16 %, and the cold storage time was reduced by 57.3 %. Without supercooling, the NCPCM has high melting enthalpy, high thermal conductivity and good thermal stability, which has a broad development prospect in the field of cold chain.

Polyrotaxane based leakage-proof and injectable phase change materials with high melting enthalpy and adjustable transition temperature

In this work, a series of advanced phase change materials (PCMs) were fabricated by using polyrotaxane (PLR) as supports for encapsulating poly (ethylene glycol) (PEG). Phase-change enthalpy is mainly regulated by the PEGcontents, whereas phase change temperature is controlled by PEG molecular weight. All PCMs have good form stabilities due to the good compatibility between PLR and PEG, and supporting ability of PLR. Given that the PLR support itself has phase-transition properties, the resulting composites have high phase change enthalpies (116.1–162.2 J g-1) and very high enthalpy efficiency (>100%). It is a green and efficient preparation method because the whole preparation process did not involve organic solvents, and the material was prepared at room temperature. In addition, the obtained PCMs can be easily extruded and re-molded, which provides technical premise and convenience for the large-scale applications. As a typical application example, the PCMsshowedits significant advantages in simulatedsolid-state diskmodel temperature regulation, which fully demonstrates the practical and superior application value of the PCMs in the field of thermal management for electronic devices.

Leakproof phase-change glass window: Characteristics and performance

A phase-change window is a type of energy-saving window that is filled with phase change material (PCM). It can store solar radiant heat and effectively adjust room temperature. In this study, a type of phase-change gel with relatively high melting enthalpy is prepared with n-octadecane and styrene-b-ethylene-b-styrene (SEBS). This gel exhibits better leakproof characteristic and cycle stability compared with n-octadecane. We fill a double-layer glass with this gel to make a novel phase-change gel window (PCGW). Compared with a normal PCM window (PCMW), the phase-change gel will not leak out of the window during solid-liquid phase transition, and it exhibits an equivalent light transmittance during its melting state. Experimental results show that the PCGW achieves better thermal insulation than the PCMW. It can delay the time to reach peak temperature and lower the peak temperature. The temperature regulation performance of the PCGW is determined by its thickness and solar radiation intensity. When the thickness of the gel increases from 4 mm to 8 mm, the peak temperature of the inner surface of the PCGW is reduced by approximately 5.89% after being exposed to 700 W/m2 solar radiation for 120 min. When solar radiation intensity increases from 600 W/m2 to 800 W/m2, the peak temperature of the inner surface of the PCGW increases by approximately 3.25 °C. The PCGW can effectively regulate indoor temperature and benefit from natural light during daytime. It exhibits high application prospect in green energy buildings.

Study of thermal energy storing beeswax microcapsules by in situ polymerization method

Bioproduct beeswax has good potential to serve as Phase Change Material (PCM) for thermal energy storage applications. But leakage problems during the thermal transition process of beeswax demand for its encapsulation. This study demonstrates the use of resorcinol modified phenol-formaldehyde shell for beeswax microencapsulation. The optimum values of process parameters for microencapsulation were determined with the help of the Taguchi orthogonal array. Taguchi method helps to minimize experimental formulation numbers for determining optimum values of process parameters. The optimum values for control parameters core to shell ratio, surfactant concentration and agitation speed were 1:1, 3% and 800 rpm respectively. The microencapsulation process carried out with optimum parameter values yielded microencapsulated PCM. FTIR, DSC and particle size analysis confirmed microencapsulation of beeswax with resorcinol modified phenol-formaldehyde shell. Microcapsules had high melting enthalpy of 148.93 J/g with the peak phase transition temperature of 57.86 oC. Morphological analysis with SEM and optical microscope reported spherical geometry of beeswax microcapsules. Heat transfer profile of microcapsules captured with thermal imaging camera reciprocated with DSC results. The prepared thermal energy storing microcapsules will enhance the performance of building materials, solar devices, electronic systems and packaging materials.

Functional Unit Construction for Heat Storage by Using Biomass-Based Composite.

How to construct a functional unit for heat storage by using biomass materials is significant for the exploration of phase change materials (PCMs). In this work, we try to design and construct a functional unit for heat storage by employing a vacuum impregnation method to prepare sugarcane-based shape stabilized phase change materials (SSPCMs) for improving the thermal conductivity of phase change materials (PCMs) and preventing the liquid state leakage of PCMs. The morphologies of the prepared materials are characterized by Scanning electron microscope (SEM) as containing a unique channel structure which is viewed as the key factor for heat storage. X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR), and thermogravimetric analysis (TGA) were used to characterize the prepared materials. The results indicated that no chemical reaction occurred between PEG and sugarcane-based biomass during the preparation process and SSPCMs showed great thermal stability. Their thermal properties are measured by using the differential scanning calorimetry (DSC) characterization and show a high melting enthalpy of 140.04 J/g and 94.84% of the relative enthalpy efficiency, illustrating the excellent shape stabilized phase change behavior. Moreover, the highest thermal conductivity of SSPCMs is up to 0.297 W/(mK), which is 28.02% higher than that of the pristine PEG. The excellent capability for thermal energy storage is attributed to the directional thermal conduction skeletons and perfect open channels and the unique anisotropic three-dimensional structure of the SSPCMs. Hence, the unique structure with PEG is testified as the functional unit for heat storage. Comprehensively considering the excellent properties of sugarcane-based materials—providing cheap raw materials via green preparation—it is conceived that sugarcane-based materials could be applied in many energy-related devices with reasonable function unit design.

New double nonlinear-optical borate Rb3SmB6O12: Synthesis, structure and spectroscopic properties

New noncentrosymmetric alkali rare-earth double borate Rb3SmB6O12 was found in the ternary system Rb2O–Sm2O3–B2O3. The Rb3SmB6O12 powder was prepared by the solid state reaction method at 750 °C for 40 h and the crystal structure was obtained by the Rietveld method. Rb3SmB6O12 crystallized in space group R32 with unit cell parameters a = 13.4874 (3) and c = 30.9398 (6) Å, V = 4874.2 (2) Å3, Z = 15. In the three-dimensional framework structure of Rb3SmB6O12, each [B5O10]5− group is linked to four different Sm-O polyhedra and, likewise, each Sm-O polyhedron is connected to four neighboring [B5O10]5− groups. The Sm-O polyhedra are formed by the face-sharing linked SmO6 octahedra. Rb+ cations are located in large cavities of the framework structure. From the thermal stability measurements, the incongruent melting of Rb3SmB6O12 is observed at 1104 K with as high melting enthalpy as Hm = –161.5 J/g. The nonlinear optical response of Rb3SmB6O12 tested via SHG is estimated to be similar to that of K3YB6O12. The Raman spectrum of Rb3SmB6O12 is mainly governed by the vibrations of BO4 and BO3 borate groups observed over the wavenumber range of 287–1550 cm–1. The spectral bands below 270 cm–1 were attributed to rotational, translational and mixed vibrations of Rb3SmB6O12 structural units. The luminescence spectrum of Sm3+ ions in the specific local environment of the Rb3SmB6O12 crystal lattice shows the ability to control the individual band intensity ratio originating from 4G5/2 level.

Multifunctional nanofiber membrane with anti-ultraviolet and thermal regulation fabricated by coaxial electrospinning

Ultraviolet radiation is extremely harmful to humans and often occurs in high-temperature weather. The development of intelligent textiles based on UV protection and thermal regulation is paramount. In this research, we use coaxial electrospinning technology to prepare anti-ultraviolet smart thermo-regulating nanofiber membranes. The zinc oxide (ZnO) and octadecane were incorporated into nanofibers with the polyacrylonitrile (PAN)/ZnO as sheath and the octadecane as core successfully. The composite nanofibers have excellent comprehensive properties, the highest melting enthalpy is 111.38 J/g, and the UPF value is 86.21. This multifunctional nanofiber membrane has broad prospects in outdoor products, electronic component protection, and military products.

Temperature control performance of high thermal conductivity metal foam/paraffin composite phase change material: An experimental study

Phase change material (PCM) has been widely used in the temperature control system of electrical devices. The temperature control effect greatly depends on the thermal conductivity and melting enthalpy of PCM. The purpose of this study is to prepare metal foam/paraffin composite PCM (MFPCM) with high thermal conductivity and melting enthalpy, and experimentally investigate the effects of metal foam structure on the temperature control performance of MFPCM embedded in vertical square cavity. Firstly, the directional compression method was used to change the pore structure of metal foam and improve the directional thermal conductivity of MFPCM. The test results show that when the compression rate of metal foam is 0.2, the thermal conductivity of MFPCM increases by 23.3% compared with traditional MFPCM, while the melting enthalpy only decreases by 7.5%. On this basis, the temperature control performance of MFPCM was tested experimentally, and a two-stage metal foam filled model with gradient porosity was established. The experimental results show that the presence of metal foam can greatly enhance the temperature control effect, especially for the metal foam after directional compression. In addition, the filling model with porosity increase along heat flow direction can play a better role in improve temperature control effect of MFPCM, and the average heating surface temperature at 1000 W/m2 is 45.2 ℃.

Impact of high‐intensity ultrasound on physical properties and degree of oxidation of lipase modified menhaden oil with caprylic acid and/or stearic acid

AbstractThe purpose of this research was to determine the effect of high‐intensity ultrasound (HIU) on physical properties, degree of oxidation, and oxidative stability of structured lipids (SLs). Caprylic acid (C) and stearic acid (S) were incorporated into menhaden oil using Lipozyme® 435 lipase to obtain five samples: (1) LC 20 (menhaden oil with 20% of C), (2) LC 30 (menhaden oil with 30% C), (3) LS 20 (menhaden oil with 20% S), (4) LS 30 (menhaden oil with 30% S), and (5) Blend C (menhaden oil with 16.24% C and 13.04% S). Samples were crystallized for 90 min at the following temperatures: (1) LC 20 at 15.5°C, (2) LC 30 at 17.5°C, (3) LS 20 at 24°C, (4) LS 30 at 30°C, and (5) Blend C at 18.0°C, and HIU was applied at the onset of crystallization. Physical properties, degree of oxidation, and oxidative stability were evaluated in sonicated and nonsonicated samples. All SLs had statistically higher G′ after sonication. Sonicated LS 30, LC 30, and Blend C had a higher melting enthalpy than the nonsonicated ones, while enthalpy values in sonicated LS 20 and LC 20 samples were not statistically different than the nonsonicated ones. No significant difference between sonicated and nonsonicated samples was observed in peroxide values (1.2 ± 0.1 meq/kg, p > 0.05) and in the oxidative stability index (6.3 ± 0.2 h, p > 0.05). These results showed that HIU was effective at changing physical properties without affecting the oxidation of the samples.

Synthesis and Properties of Inositol Nanocapsules.

Sugar alcohols are phase-change materials with various advantages but may suffer from leakage during applications. In this study, inositol nanocapsules were synthesized at various conditions, including the amount of precursors and the time for adding the precursors. The effects of synthesis conditions on the properties of the nanocapsules were studied. The morphology, chemical composition, microstructure, phase-change characteristics and size distribution of the nanocapsules were investigated by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM), differential scanning calorimeter (DSC) and a zeta potential analyzer. The results confirm that inositol was well-encapsulated by an SiO2 shell. The shell thickness increased, while the supercooling degree of the nanocapsules decreased with increasing time for adding the precursors. In order to obtain nanocapsules with good morphology and phase-change characteristics, the time for adding the precursors should increase with the amount of precursors. The nanocapsules with the best properties exhibited high melting enthalpy, encapsulation ratio and energy storage efficiency of 216.0 kJ/kg, 83.1% and 82.1%, respectively. The size of the nanocapsules was remarkably affected by the triethoxysilane (TES) amount.

Effects of stirring during gelatinization and shaking during hydrolysis on the characteristics of short-chain glucan aggregates (SCGA)

Effects of stirring during gelatinization and shaking during hydrolysis on physicochemical properties of short-chain glucan aggregates (SCGA) were investigated. Both stirring and shaking improved SCGA yield, and also affected the formation and crystallization kinetics of SCGA. Without stirring and shaking, slow SCGA forming rate, large size (∼1.32 μm), high relative crystallinity (RC), high endothermic onset temperature, and high melting enthalpy (ΔH) were observed. Stirring and shaking yielded the fastest SCGA formation and crystallization rates as well as the smallest SCGA size (∼0.57 μm). Small SCGA had a low RC and low heat stability, possibly due to the presence of imperfections and low double helix content. Formation yield was negatively correlated with size, ΔH, RC, and the resistant starch content of SCGA. The highest correlations were observed between ΔH and RC. This study proves that the SCGA characteristics can easily be controlled by stirring during gelatinization and shaking during enzymatic hydrolysis.

Development of reversibly color changing textile materials by applying some thermochromic microcapsules containing different color developers

In the study, the development of cotton and wool fabrics that exhibit reversible color change and heat regulation properties was aimed. For this purpose, poly(methyl methacrylate-co-glycidyl methacrylate)/thermochromic composite 1 (PMMA/GMA/TC1) and poly(methyl methacrylate-co-glycidyl methacrylate)/thermochromic composite 2 (PMMA/GMA/TC2) microcapsules which had both of color change and heat storage properties were applied to fabrics by bath exhaustion method. Differential Scanning Calorimetry (DSC) measurement results showed that all of the fabrics could store considerable latent heat energy, as the highest melting enthalpy was obtained for Cotton 1 and Wool 1 fabrics treated with PMMA/GMA/TC1 microcapsules. The Cotton 1 and Wool 1 fabric stored the latent heat of 76.1 J/g and 89.2 J/g, respectively. According to Thermal History measurement results, microcapsule applied fabrics exhibited cooling effect resulting from the released latent heat by 1-tetradecanol which was used as the solvent component of TCs. The visual photographs and color analysis results proved that the fabrics with thermochromic property showed reversible color change with temperature variations exceeding melting.