Thermal characterization of polymer matrix composites containing microencapsulated paraffin in solid or liquid state

This work focuses on the study of heat transfer mechanisms in composites materials which may be used for Latent Heat Thermal Energy Storage applications. These composites contain phase change material (PCM) which can absorb and release energy during thermal cycling. PCM’s used here are paraffins microencapsulated in poly(methylmethacrylate); microencapsulation avoids the flow of paraffin when it is in the liquid state. Samples with different paraffin weight fractions and particles shape and distribution were studied in this work. Scanning Electron Microscopy and Differential Scanning Calorimetry were used to determine morphology and perform measurements of phase changes temperatures, enthalpies and heat capacity respectively. Further, a periodic method (DICO) allowed measuring thermal conductivity (λ) and diffusivity (a) of the composites at temperatures below and above of the paraffin phase change from crystalline solid to isotropic liquid.

[1]  M. Hawlader,et al.  Microencapsulated PCM thermal-energy storage system , 2003 .

[2]  S. Rudtsch.  Uncertainty of heat capacity measurements with differential scanning calorimeters , 2002 .

[3]  J. Su,et al.  Preparation and characterization of polyurethane microcapsules containing n‐octadecane with styrene‐maleic anhydride as a surfactant by interfacial polycondensation , 2006 .

[4]  Khamid Mahkamov,et al.  Solar energy storage using phase change materials , 2007 .

[5]  Zhang Zhibin,et al.  Microencapsulation of butyl stearate as a phase change material by interfacial polycondensation in a polyurea system , 2009 .

[6]  Yunsheng Xu,et al.  Thermal behavior of single-walled carbon nanotube polymer–matrix composites , 2006 .

[7]  D. Hutmacher,et al.  The return of a forgotten polymer : Polycaprolactone in the 21st century , 2009 .

[8]  Manuel Carmona,et al.  Microencapsulation of PCMs with a polystyrene shell , 2007 .

[9]  Y. Candau,et al.  Analysis of uncertainties in thermophysical parameters of materials obtained from a periodic method , 2006 .

[10]  Miguel Ángel Martínez,et al.  Physico-chemical and mechanical properties of microencapsulated phase change material , 2013 .

[11]  John G. Tsavalas,et al.  Synthesis and Characterization of Paraffin Wax Microcapsules with Acrylic-Based Polymer Shells , 2010 .

[12]  Yves Candau,et al.  A simultaneous characterization of thermal conductivity and diffusivity of polymer materials by a periodic method , 2004 .

[13]  J. Fukai,et al.  Thermal conductivity enhancement of energy storage media using carbon fibers , 2000 .

[14]  A. Sari,et al.  Preparation, thermal properties and thermal reliability of microencapsulated n-eicosane as novel phase change material for thermal energy storage , 2011 .

[15]  P. Pötschke,et al.  Influence of screw configuration, residence time, and specific mechanical energy in twin-screw extrusion of polycaprolactone/multi-walled carbon nanotube composites , 2010 .

[16]  M. M. Chen,et al.  Microconvective Thermal Conductivity in Disperse Two-Phase Mixtures as Observed in a Low Velocity Couette Flow Experiment , 1981 .

[17]  James F. Shackelford,et al.  The CRC Materials Science And Engineering Handbook , 1991 .

[18]  Haifeng Shi,et al.  Crystallization behaviors of n-nonadecane in confined space: observation of metastable phase induced by surface freezing. , 2006, The journal of physical chemistry. B.

[19]  Ruzhu Wang,et al.  An overview of phase change material slurries: MPCS and CHS , 2010 .

[20]  Mónica Delgado,et al.  Review on phase change material emulsions and microencapsulated phase change material slurries: Materials, heat transfer studies and applications , 2012 .

[21]  Luisa F. Cabeza,et al.  Review on thermal energy storage with phase change: materials, heat transfer analysis and applications , 2003 .

[22]  Ying Zhao,et al.  Effect of geometrical confinement on the nucleation and crystallization behavior of n-alkane mixtures. , 2008, The journal of physical chemistry. B.

[23]  A. Sari,et al.  Thermal conductivity improvement of stearic acid using expanded graphite and carbon fiber for energy storage applications , 2007 .

[24]  M. E. Navarro,et al.  Effect of microencapsulated phase change material in sandwich panels , 2010 .

[25]  Jorge J. Moré,et al.  The Levenberg-Marquardt algo-rithm: Implementation and theory , 1977 .

[26]  Wei Li,et al.  Morphology, structure and thermal stability of microencapsulated phase change material with copolymer shell , 2011 .

[27]  Amar M. Khudhair,et al.  A review on phase change energy storage: materials and applications , 2004 .

[28]  A. Sari,et al.  Microencapsulated n-octacosane as phase change material for thermal energy storage , 2009 .

[29]  Alexei Vazquez,et al.  Effect of lignocellulosic filler type and content on the behavior of polycaprolactone based eco-composites for packaging applications. , 2012, Carbohydrate polymers.

[30]  Ye Hong,et al.  Preparation of polyethylene–paraffin compound as a form-stable solid-liquid phase change material , 2000 .

[31]  Mohammed M. Farid,et al.  A Review on Energy Conservation in Building Applications with Thermal Storage by Latent Heat Using Phase Change Materials , 2021, Thermal Energy Storage with Phase Change Materials.

[32]  Dan Zhou,et al.  Experimental investigations on heat transfer in phase change materials (PCMs) embedded in porous materials , 2011 .

[33]  Ying Zhao,et al.  Crystallization behaviors of n-octadecane in confined space: crossover of rotator phase from transient to metastable induced by surface freezing. , 2008, The journal of physical chemistry. B.

[34]  F. Asinger.  Paraffins; chemistry and technology , 1967 .

[35]  Michel Dirand,et al.  Normal Alkanes, Multialkane Synthetic Model Mixtures, and Real Petroleum Waxes: Crystallographic Structures, Thermodynamic Properties, and Crystallization , 2002 .

[36]  Xingxiang Zhang,et al.  Formaldehyde-free and thermal resistant microcapsules containing n-octadecane , 2009 .

[37]  Frédéric Kuznik,et al.  A review on phase change materials integrated in building walls , 2011 .

[38]  E. Sirota,et al.  PHASE TRANSITIONS AMONG THE ROTATOR PHASES OF THE NORMAL ALKANES , 1994 .

[39]  S. M. Hasnain.  Review on sustainable thermal energy storage technologies, Part I: heat storage materials and techniques , 1998 .

[40]  Wei Li,et al.  UV irradiation-initiated MMA polymerization to prepare microcapsules containing phase change paraffin , 2010 .

[41]  A. Craievich,et al.  Evidence of a phase transition in the rotator phase of the odd‐numbered paraffins C23H48 and C25H52 , 1981 .

[42]  J. E. Mark,et al.  Physical properties of polymers handbook , 2007 .

[43]  L. Ventolà,et al.  Phase Change Materials (PCM) microcapsules with different shell compositions: Preparation, characterization and thermal stability , 2010 .