相变微胶囊/环氧树脂复合泡沫的制备及性能
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摘要
以石蜡@密胺树脂微胶囊(Pn@MF)为相变填料,环氧树脂为支撑材料,通过将相变微胶囊封装在环氧树脂泡沫中得到一种复合相变材料(CPCMs)。通过扫描电镜表征表明相变微胶囊与环氧树脂泡沫相容性良好。随着微胶囊含量的增加,差示扫描量热分析表明CPCMs的相变焓值增大,当Pn@MF含量为40%时,焓值达到102. 2 J/g,其泄漏率仅为1. 31%,具有较低的渗漏率; CPCMs的热导率始终低于0. 14 W/(m·K)。随着发泡剂含量的增加,CPCMs的渗漏率降低,热导率降低,而力学性能先升高后降低。发泡温度的升高会对渗漏率、热导率和力学性能产生不利影响。CPCMs的低导热率和低泄漏率可应用于热能储存领域。
Using Paraffin@ melamine resin microcapsules( Pn@ MF) as phase change fillers and epoxy resin as support material,a series of composite phase change materials( CPCMs) were obtained by embedding Pn@ MF in epoxy resin foam. Scanning electron microscopy shows that the Pn@ MF and the epoxy resin foam have good compatibility.With increase of the microcapsule content,the DSC test shows that the phase change enthalpy of CPCMs increases.When the Pn@ MF content is 40%,the enthalpy value reaches 102. 2 J/g and its leakage rate is only 1. 31%,which has a low leakage rate. The thermal conductivity of CPCMs is always lower than 0. 14 W/( m·K). With increase of the foaming agent content,the leakage rate of CPCMs decreases,the thermal conductivity decreases,and the mechanical properties first increase and then decrease. An increase in the foaming temperature adversely affects the leak rate,thermal conductivity,and mechanical properties. The low thermal conductivity and leakage rate of CPCMs can be used in the thermal energy storage field.
Using Paraffin@ melamine resin microcapsules( Pn@ MF) as phase change fillers and epoxy resin as support material,a series of composite phase change materials( CPCMs) were obtained by embedding Pn@ MF in epoxy resin foam. Scanning electron microscopy shows that the Pn@ MF and the epoxy resin foam have good compatibility.With increase of the microcapsule content,the DSC test shows that the phase change enthalpy of CPCMs increases.When the Pn@ MF content is 40%,the enthalpy value reaches 102. 2 J/g and its leakage rate is only 1. 31%,which has a low leakage rate. The thermal conductivity of CPCMs is always lower than 0. 14 W/( m·K). With increase of the foaming agent content,the leakage rate of CPCMs decreases,the thermal conductivity decreases,and the mechanical properties first increase and then decrease. An increase in the foaming temperature adversely affects the leak rate,thermal conductivity,and mechanical properties. The low thermal conductivity and leakage rate of CPCMs can be used in the thermal energy storage field.
引文
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[7] Li W,Wan H,Lou H,et al. Enhanced thermal management with microencapsulated phase change material particles infiltrated in cellular metal foam[J]. Energy,2017,127:671-679.
[8] Wang H,Wang F,Li Z,et al. Experimental investigation on the thermal performance of a heat sink filled with porous metal fiber sintered felt/paraffin composite phase change material[J]. Appl. Energ.,2016,176:221-232.
[9] Prabhu Bose A N,Amirthamb V A. A review on thermal conductivity enhancement of paraffinwax as latent heat energy storage material[J]. Renew. Sust. Energ. Rev.,2016,65:81-100.
[10] Rybinski P,Anyszka R,Imiela M,et al. Effect of modified graphene and carbon nanotubes on the thermal properties and flammability of elastomeric materials[J]. J. Therm. Anal. Calorim.,2017,127:2383-2396.
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[12] Zhang L,Yang W,Jiang Z,et al. Graphene oxide-modified microencapsulated phase change materials with high encapsulation capacity and enhanced leakage-prevention performance[J]. Appl. Energy.,2017,197:354-363.
[13] Jiang Z,Yang W,He F,et al. Modified phase change microcapsules with calcium carbonate and graphene oxide shells for enhanced energy storage and leakage prevention[J]. ACS Sustain.Chem. Eng.,2018,6:5182-5191.
[14] Alva G,Lin Y,Liu L,et al. Synthesis,characterization and applications of microencapsulated phase change materials in thermal energy storage:a review[J]. Energy Build.,2017,144:276-294.
[15] You M,Zhang X X,Li W,et al. Effects of Micro PCMs on the fabrication of Micro PCMs/polyurethane composite foams[J]. Thermochim. Acta,2008,472:20-24.
[16] Arce M E,Alvarez Feijoo M A,Suarez Garcia A,et al. Novel formulations of phase change materials-epoxy composites for thermal energy storage[J]. Mater.(Basel),2018,11:195-213.
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