摘要
差示扫描量热仪可以测定多种热力学和动力学参数,如比热容、反应热、转变热、相图、反应速率、结晶速率、高聚物结晶度及样品纯度等。该仪器具有使用温度范围宽（-175~500℃）、分辨率高和试样用量少的优点。本文论述了差示扫描量热仪的特点、目前我国与差示扫描量热法相关的标准以及方法的未来发展趋势。未来在聚合物的结晶性研究和相变材料的热焓变化测量方面,差示扫描量热法（differential scanning calorimetry, DSC）会有更广泛的应用。在物质的鉴别方面,熔点的精确测量也会起到很重要的辅助作用。未来期待温度范围更宽的 DSC 仪器的出现,同时,红外-气相-差式扫描联用技术及热重-差式扫描量热联用仪器的更进一步发展会使得联用技术在未来得到更多的重视。
Differential scanning calorimeter can determine various thermodynamic and kinetic parameters, such as specific heat, heat of reaction, heat of transformation, phase diagram, reaction rate, crystallization rate, crystallinity of polymers, and sample purity, etc. The instrument has the advantages of wide temperature range （-175~500 ℃）, high resolution, and small amount of sample. This paper discussed the characteristics of differential scanning calorimeter, related standards in China, and the future trend of this method. The differential scanning calorimetry （DSC） will be more widely used in the study of the crystalline properties of polymers and the measurement of the thermal enthalpy of phase change materials in the future. In the identification of substances, the precise measurement of melting point will also play a very important auxiliary role. The emergence of DSC instruments with a wider range of temperatures in the future is expected. At the same time, the development of infrared spectroscopy-gas chromatography-differential scanning calorimetry （IR-GC-DSC） and thermogravimetric analysis-differential scanning calorimetry （TA-DSC） will make the combined techniques to get more attention in the future.
作者
池海涛
刘伟丽
高峡
周明强
赵婷
CHI Hai-Tao LIU Wei-Li GAO Xia ZHOU Ming-Qiang ZHAO Ting(Beijing Centre for Physical and Chemical Analysis, Beijing Key Laboratory of Organic Materials Testing Teehnology＆ Quality Evaluation, Beijing 100089, China Beijing Academy of Science and Technology Key Laboratory of Analysis and Testing Technology, Beijing 100089, China)
出处
《食品安全质量检测学报》
CAS
2016年第11期4374-4377,共4页
Journal of Food Safety and Quality
基金
北京市科学技术研究院创新工程Ⅲ-1(2015-178305)
北京市科学技术研究院青年骨干计划(201526)~~
关键词
差示扫描量热法
熔融
结晶
焓值
differential scanning calorimetry
melting
crystallization
enthalpy
