Inverse gas chromatography as a method for determination of surface properties of binding materials

2017 3rd International Conference on Applied Materials and Manufacturing Technology

Yu, Jihai^1 ; Lu, Xiaolei^1 ; Yang, Chunxia^2 ; Du, Baoli^3 ; Wang, Shuxian^4 ; Ye, Zhengmao^1,4

Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan, Shandong Province, China^1

School of Chemical and Chemical Engineering, University of Jinan, Jinan, Shandong Province, China^2

Dong Guan Chuang Jie New Materials CO., LED., China^3

School of Material Science and Engineering, University of Jinan, Jinan, ShandongProvince, China^4

关键词: Acid-base property;    Adsorption performance;    Dispersive components;    Inverse gas chromatography;    Measurement techniques;    Sulphoaluminate cement;    Superplasticizers;    Surface free energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/242/1/012001/pdf
DOI  :  10.1088/1757-899X/242/1/012001

来源: IOP

【 摘 要 】

Inverse gas chromatography (IGC) is a promising measurement technique for investigating the surface properties of binding materials, which are the major influence element for the adsorption performance of superplasticizer. In this work, using the IGC method, blast furnace slag (BFS), sulphoaluminate cement (SAC) and portland cement (P•O) are employed to systematically evaluate the corresponding dispersive component (γsd), specific surface free energy (γsab), and acid-base properties. The obtained results show that γsdcontributes to a major section of the surface free energy in the three binding materials, suggesting they are of a relatively low polarity. Compared to the two kinds of cements, the BFS possesses the highest dispersive and specific surface free energies (the values are 45.01 mJ/m2and 11.68 mJ/m2, respectively), and also exhibits a wider distribution range of γsd, indicating their surfaces are heterogeneous. For acid-base properties, the results indicate the surfaces of three samples are basic in nature. In addition, the adsorption investigation shows that per unit surface of BFS adsorbs the most superplasticizer molecules, which indicates the higher surface free energies is beneficial to the superplasticizer adsorption.