Enhanced photothermal conversion and thermal conductivity of phase change n-octadecane microcapsules shelled with nano-SiC doped crosslinked polystyrene  

作　　者：Kuan Zhao Jifen Wang Huaqing Xie Zhixiong Guo 

机构地区：[1]School of Resources and Environmental Engineering,Shanghai Polytechnic University,Shanghai Engineering Research Center of Advanced Thermal Functional Materials,Shanghai,201209,China [2]Research Center of Resource Recycling Science and Engineering,Shanghai Polytechnic University,Shanghai,201209,China [3]Department of Mechanical and Aerospace Engineering,Rutgers,The State University of New Jersey,Piscataway,NJ 08854,USA

出　　处：《Energy Storage and Saving》2022年第4期284-292,共9页储能与节能（英文）

基　　金：supported by the National Natural Science Founda-tion of China(Grant No.:51776116);Shanghai Science and Technology Project(Grant No.:22010500600).

摘　　要：Microcapsules incorporating phase change material n-octadecane(ODE)shelled with crosslinked polystyrene(CLPS)were prepared via the suspension polymerization.SiC nanoparticles(nano-SiC)were employed to modify the shell to improve the heat transfer and photothermal conversion of the microcapsules.The scanning electron microscopic analysis revealed the microcapsules of a general spherical shape.The surface components and chemical composition of the microcapsule samples were evaluated by the energy-dispersive X-ray and Fourier transform infrared spectroscopy,confirming that the nano-SiC have been embedded in the CLPS shell.Results show that the microcapsule sample with 1.25 wt.%nano-SiC(denoted as MPCM3)exhibits the best heat property among the four kinds of samples prepared with various nano-SiC dosages,and all the nano-SiC doped samples have improved thermal conductivity and photothermal conversion as compared to the microcapsule sample without doping(denoted as MPCM1).Compared to the MPCM1,the thermal conductivity of the MPCM3 is increased by 65.3%,reaching 0.124±0.005 W·m^(−1)·K^(−1).The MPCM3 has excellent thermal stability as well.Differential scan-ning calorimetry examination shows that the MPCM3 has higher melting and crystallization enthalpies than the MPCM1,achieving 106.8±0.3 J·g^(−1) and 104.9±0.2 J·g^(−1),respectively.In the photothermal conversion experi-ments,the MPCM3 exhibited great photothermal conversion capability,with a 54.91%photothermal conversion efficiency,which is 145.68%higher than that of the MPCM1.

关 键 词：Phase change material(PCM) MICROCAPSULE SiC NANOPARTICLE Thermal property Photothermal conversion 

分 类 号：TB383[一般工业技术—材料科学与工程] TK12[动力工程及工程热物理—工程热物理]