Optical Properties and Crystallization of Natural Waxes at Several Annealing Temperatures: a Terahertz Time-Domain Spectroscopy Study

被引:14
作者
Tian, Lu [1 ,2 ]
Xu, Xinlong [1 ,3 ]
机构
[1] Natl Photoelect Technol & Funct Mat & Applicat In, Natl Key Lab Photoelect Technol & Funct Mat Cultu, Xian 710069, Peoples R China
[2] Northwest Univ, Sch Phys, Xian 710069, Peoples R China
[3] Northwest Univ, Inst Photon & Photon Technol, Xian 710069, Peoples R China
关键词
Terahertz; Natural wax; Paraffin wax; Beeswax; Liquid paraffin; Crystallization; MULTICOMPONENT PARAFFIN WAXES; MOLECULAR-DYNAMICS; PHASE-TRANSITION; N-PARAFFINS; BEESWAX; BEHAVIOR;
D O I
10.1007/s10762-017-0461-3
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The thermal analysis and optical properties of paraffin wax, beeswax, and liquid paraffin annealed at variable temperatures have been conducted using terahertz time-domain spectroscopy (THz-TDS) coupled with SEM methods. The characteristic optical properties of natural waxes can be used to analyze natural wax adulteration. The lamellar structure of paraffin wax and beeswax grew by a sheet of chain expansion. Furthermore, the crystallization process of paraffin wax can be assigned: rotator-solid transition and liquid-solid ones. According to the temperature-dependent refractive index curves, the refractive index of paraffin wax varies from large to small followed by rotator-liquid transition, untreated one, and liquid-solid one, respectively. The results indicated that THz-TDS has been proved to be of great potential in identification the crystallization of waxes.
引用
收藏
页码:302 / 312
页数:11
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