【摘 要】
：
Microencapsulated n-alkanes as energy-storage materials have promising application prospects.The microcapsules containing 100-50 wt% of n-octadecane,0-20 wt% of
【机 构】
：
Tianjin Municiipal Key Lab of Modification and Functional Fibers
论文部分内容阅读
Microencapsulated n-alkanes as energy-storage materials have promising application prospects.The microcapsules containing 100-50 wt% of n-octadecane,0-20 wt% of paraffin and 0-30 wt% of cyciohexane were synthesized by in-situ polymerization using melamineformaldehyde polymer as shell.Cyclohexane was removed after heat-treated the microcapsules at 100℃.The morphologies,cell parameters,phase change properties,thermal stable temperatures of these micrecapsules were examined.The diameters of these mieroeapsules arc lower than 5 μm.The effect of paraffin in the microcapsules on the cell parameters of,n-octadecane is negligible.The paraffin is effectively used as a nucleating agent to decrease the degree of supercooling.The melting enthalpy is decreased from 132 J/g to 111 J/g due to the increase of the cyciohexane contents.The thermal stable temperature is enhanced 6-16℃ after heat-treated the microcales at 160℃ for 30 min.
其他文献
振动激发,不仅会在地下不同介质分界面上产生波动场的反射、折射等现象,同时还能激励产生不同频率的电磁波.本文介绍了自然电位场振动激励效应,也就是研究在野外地质条件下,
Polyacrylonitriles (PANs) were synthesizid both by atom transfer radical polymerization (ATRP) and free radical polymenzation in ionic liquid 1-buty-3-methylimi
In this paper, we propose an incremental statistical analysis method with complexity reduction as a pre-process for on-chip power/ground (P/G) networks. The new
Bump foil bearings without nominal radial clearance were analyzed. An air film thickness model and a bearing theoretical analytical model were developed account
According to thermodynamics and kinetics of phase transformation, a mathematical model of phase transformation was proposed, and the microstructure evolution of
Since in most practical cases the processing time of scheduling is not deterministic,flow shop scheduling model with fuzzy processing time is established.It is
A new aqueous alkaline resol phenol-formaldehyde resin has been prepared from phenol and formaldehyde using NaOH as catalyst;the optimum synthetic process has b
Titanium produces different compounds in gray iron. In order to determine their characteristics, a scanning electron microscope, an energy dispersive X-ray spec
Suppose to toss an independent coin with equal probability of success and failure for each subset of [n]={l,2,…,n},and form the random hypergraph H(n) by takin